98 S10 Vortec V6 Throttle Body Mod "Free HP" 

Lol

(Patient) "Doctor, it HURTS when I do THIS!" (Doctor) "Well, don't do that!"

I agree. However I didn't notice any change in fuel economy. My Sonoma is lightened so much that the truck was a little too sensitive with this mod, so changed back to a stock blade.

Michael Beutler if it allows more air in... that adds horsepower...

It only adds horsepower at part throttle. Full throttle makes no difference.

Maybe if it becomes too sensitive you can cut off not the whole thing but only a half of it to improve response?

lmfao.....I JUST did this to my 98 jimmy and hoooooly....shit!!!!

Is that literally cannot make a big difference without considering this modification does zero difference

OMG, noooooooooooooo!

Send ittttt..... lol

That was not smart at all.

I felt physical pain reading that. I hope he somehow got it out.

@@bigboyexpress6668 naw he didnt he left it and its been a couple months now and he hasnt had a problem yet. Idk how its crazy.

Yeah the placebo effect is real. That mod does absolutely nothing and you would not be able to tell a difference

A well taken care of truck it sounds like. The 4.3 is a great engine.

405K miles, sounds like you do regular oil changes. My 4.3 had over 300K but the truck finally cratered.

A 5.7 throttle body has a little lip on them, and it bolts right up on 4.3. Definitely better route then doing all that work lol

5.7 wut year?

The 4.3 is the 5.7 engine with two cylinders sliced off. Almost all parts are identical and readily available.

@@rocketjr5120 I believe it was a 98 5.7 and my Sonoma was a 4.3 year 2000. Just go to a junkyard and pick one up for cheap and keep your original throttle body. And the tps and IAC sensors switch right over, drove the truck for 40k miles like that with no problem until I got rid of it. Hope this helps!

@@kuprebou57 Bingo! Haha even the sensors switch over and throttle cable and cruise control cable. Definitely should have been the way the 4.3 should have been

Don't they have the same size throttle body? If the 5.7 does have a larger bore throttle body, what about the intake opening on the plenum? If it's matched to the original you didn't increase the CFM.

Hi yeah I did this to my 4.3 vortec put an edlbrock intake manifold fuel rail and oh yeah 2 turbochargers that lip blocks the freedom of the air to enter my engine so I can properly warm up my tires for a pull, good luck with grandma speed

And I still get 26mph on the highway with 460 HP ;)

@Jason Winkowski How so? The MAF sensor is upstream from the throttle body!

@@annabellewolfgang7177 "26mph" on the highway is a little slow don't cha think?

You like the no BS approach on a video 100% about bs lol This mod does nothing.

@Cyber_Cowboy I beg to differ once I did this mod on a 4.3 vortec 1500 gmc sierra and before the mod she wouldn't even spin the tires once I did the mod she would spin the tires with ease as always your results may very but from me I gained more power, better pickup and better driveabilty

What about Gas Saving???

Lol what car doesn't cruise at 60 mph unless its a beater?? 😂😂😂

@@kathleenkatefraser1765 right lol wtf

@@JodBronson this mod doesn't save gas

@@dudeinoakland - Thankx for the reply. I learn that a while back.

Hi I have a 3.8 v6 ecotec and I have the mesh screen ! Did it really make a difference pulling it out? Cheers from Australia

@@dragan3290 I have family in the land Down Under, always a pleasure to meet a fellow Ausie! I do some engineering stuff, and had a Corvette (5.7 LS1 baby!) that I de-screened the MAF. I don't recommend the mod, as you'll lose a bit of low-end torque to gain a little HP on top. The Screen straightens out the airflow, reducing turbulence, and increasing air velocity. It also makes a slightly more accurate MAF reading. Air velocity is important in maintaining low end torque, which is why an intake or exhaust that is too big in diameter reduces torque. Low RPM's= less air flow. Air slows down if less air flow in a bigger space. Think of a garden hose with your thumb over the end, slightly restricting... water sprays out with more velocity. A little of the right kind of 'restriction' is good for increased velocity to maintain low-end torque. No restriction is good for top-end horsepower (where you need maximum movement of air and exhaust gasses), but even a fellow Ausie isn't driving at full throttle 100% of the time! This throttle body restriction in the video, however, is nothing but a joke! In the late '90s, GM corporate fools must've asked themselves, "We're coming up with the next Gen Vortec engines, how are we gonna sell them?" "Gee I know, let's restrict and 'sand-bag' the trusty current gen Vortec's to make the next gen 'New and more powerful!" Brilliant!

@@jeladsnikpoh1289 thanks for the quick reply! Cheers 🙂 👍👍👍. The maf I have is a spare. Same as my throttle body porting I did on a spare unit. Very jumpy but I'd you saw the throttle body? I funnelled it and polished till I got a mirror finish. Just as an expirement, but it feels so much more responsive. Lol.

@@dragan3290 sounds good! Porting and polishing helps, and the maf screen doesn't make a big difference either way. Certainly can't hurt it! You might have lost a tiny bit of torque, but you gained a little HP with the screen delete. Modifying engines is in our blood, and we can't help but pursue every last drop of HP, mpg, etc! It doesn't matter if it's a motorized bicycle, lawnmower, or SaturnV rocket engine! It's all good!

@@jeladsnikpoh1289 actually I want to lose the jumpy feel as in the wet you can't take off even moderately. I also ported the intake manifold, matched the intake runners, and I put mace engineering manifold spacer and plenum spacer. So I've basically got a mini tunnel ram. Lol. If I can shift the power to midrange? I'm laughing! 🙂👍👍👍

The MAF should be upstream from this. So no side effects. This won't change the actual volume of air coming in, but the velocity and reduction or turbulence.

If you do the mod exactly like I show it then you will have no issues. I think you have moved or bumped something else. This mod doesn't do anything to your idle.

It did to mine.

I took the plate out with the extra holes. Drilled 5 holes 1/4 inch diameter in the flap of the original plate and put it in. It idles at 600 RPM now and those 5 holes in the flap gives it some extra air without removing the flap.

There is a computer on these trucks with sensors that tell it what is going on with air flow and fuel. It will adjust fuel when more air comes in. There is a limit of what the stock injectors can do but this mod will not test that limit. Your truck might have old sensors or even a worn engine that won't allow you to feel much of a difference.

Actually, when "punching" the throttle wide open, this mod has no benefit. It's not a restriction to the 4.3s ability to draw in as much air as its capable of, without restriction. Even with the damper in place, these TBs are capable of supporting 300+ hp without restriction... All this mod is good for, is giving snappier throttle response at off-idle/part throttle. That's it.

Lee S. i disagree . you dont feel the response much more when off idle /part throttle. but its still more responsive/ jumpy when u punch it.i wouldnt even say MORE responsive. its just the way its responding is different. its more of an agressive response. it would still be responding with the damper just lagging because its choked out when the throttle plate is slightly lifted. this plate does restrict air at a certain throttle position....

milldabeast519 My results have been just the opposite of yours. There's definetly a part throttle difference. But flat-punching the throttle to the floor will make no difference, because the throttle bore will be open more to supply the engine with more airflow than the 4.3 can consume, regardless of which throttle blade I use.

Lee S. when people say they want a snappy throttle response they mean a faster response from the throttle . this does nothing of that sort. its just changing how its responds. which is jumpy. because instead of allowing the air in slow its rushing in. if you have a sense for it you will feel the difference at all levels of throttle.

milldabeast519 you cant drive ive done this mod and can barely feel a difference other then better throttle response

because this is way easier.

Grinding the rivet would cause additional idle air flow due to holes in the plate

@@jenmelendez6237 So you didn't read the whole question.

pull her down into 2nd gear, then take off

If you could drive lol

Ha 😆 👉👌

That's why Chevy brilliantly installed an infinite-ratio throttle peddle. Very cool contraption, the driver can apply any amount of throttle from 0-100%! Really handy feature on ice and avoiding penalties from law enforcement, etc. My Corvettes came with this ingenious feature, and I never had a problem driving them. Crazy thing, with well over 400HP on tap, I never got a ticket, never recked the beasts, even found out it was capable of going less than 180mph, all because of this infinitely variable-ratio throttle feature!

​@@jeladsnikpoh1289 I simple put the Chevy Blazer into 4x4 And with actual ice and snow tires Not "winter Or all season" tires push threw feet(s) of snow Also good for going down that side road that turns into a gravel road that then turns into dirt And pits and bumps crossing a river ....Variable-ratio throttle / Throttle controller for $300 isn't going to do anything for me Or a Corvette stuck in a snow bank / muddy ditch Matter of fact 97% of corvette owners store their cars in snowy areas of North America for one of two reasons Salt And rust, Killing someone And being killed. Yet you say You have a throttle commander on your corvette has helped you drive on ice?

This mod will do nothing but give you a bit more power just as you hit the gas. Nothing else will change at all unless you didn't get the parts put back right.

best all motor 4.3 budget build start im in the middle doin tht exact set up gatta have the alluminum distributor to

For its size it’s a fairly inexpensive motor to play with. Parts range up to $600 to $700. Just short of flashing the ECM, aftermarket MAF sensor, and getting into the internals it runs strong. I added a CAI, the TB, spacer, manifold, headers, high flow cat, and cat back exhaust, underdrive pulley, and electric fans. I had an MSD 6A ignition, but after roasting a few plugs I took it out.

Where do you get a marine intake? I was wanting to upgrade my spider injector but I said screw it and wanted to get external injectors on s fuel rail. Was originally just going to ls swap it but I dont have time this year

It’s been several years but I bought the manifold online. I had the same feeling about the spider injectors, but did the upgrade a year before swapping manifolds. I really didn’t notice much difference with the upgraded spider. The marine manifold did give me a bit more noticeable low end boost in power. For the engine it is it can be really tough. IMO I’d go with the ls swap if you want your truck to run like a scalded ape.

@@bolerdweller man you can get it on amazon just put vortecc 4.3 intake and done

mazdafiero11 Removing that deflector will not effect the idle. You had other issues.

Yeah I think is was the cruise control, I unhooked the wire and now it seems fine damn thing would pull the blade wide open to 4,500!!

You are wrong...….at least 60hp.

Don't forget the cherry bomb extreme muffler with E3 spark plugs 😃

Its the same amount of power just improves throttle responsiveness. And the filters would do maybe 3 or 4 horsepower and the throttle body spacers do jack shit so.

have you put a groove under the blade ? I did that on top of all the other stuff cat back exhaust to I noticed alot more throttle response on my 4.3 but after the initial jump upon flooring it it slowly falls off

@@_THE_PIRATES_BOOTY_ Where you make the groove? Upper or lower of the blade?

Maybe someone did the mod before you bought the truck. If you want fuel mileage make sure your engine is running at good as it can. Good spark plugs, wires, cap, rotor, clean fuel filter, good O2 sensors, good CAT's. A bottle of fuel cleaner every now and then to keep your injectors spraying good. Clean oil is also important. And finally be easy with the throttle.

@@mossman381 40 ohm wires and platinum coated plugs, ect. I may do an EGR deleted and put in an electric fan

Like if they are modified and failed?

🤣😂😂😂😂😂😂 how has no one got this after 3 years

What rivet are you talking About?

@@Ezequiel42o I wish I could send you a picture. Just make sure there are no holes in the plate. You also do not need to remove the throttle body. Just unscrew the plate and pull it out

Don't know about mileage but it does make the truck feel more powerful on take off.

LOL, more Air more Joy? LOL

Best free mod there is for these engines. Doesn't add any horse power just lets more air in the moment the throttle is applied.😎 That flap is a diffuser and the only purpose it serves is to turbulate the incoming air to help it mix with fuel a little better in the combustion chambers but in doing so kills your throttle response from idle. guess gm engineering was okay with that as long as it meant potentially better fuel efficiency.

I Am YZDEMON

Potentially in the future I will make a RU-vid video on this

I don't know about a dyno but driving the truck you can feel a difference. Right when you hit the throttle it feels like you have more power. I probably wouldn't do this mod by itself but as long as you have it tore apart it's an easy mod that you can feel when driving.

This is going on an S10. I have bought ported throttle bodies before and they are a great upgrade. You can feel a difference.

Sorry nobody's replied to you sooner, you've probably already figured out what I'm about to tell you... As far as I know, they only put this joke throttle restrictor in GM Vortec 4300 V6, 5.0l and 5.7 V8s. I have a Vortec 7.4L V8 from the same era, and it doesn't have the stupid restrictor. I also have the newer 5.3L V8 in my Envoy and it doesn't have it. I think they put them in to 'sandbag' the the 1st gen Vortecs, so they could advertise the next gen Vortecs as 'new and much more powerful!' My smaller 5.3L has 60 more hp than the 5.7 did.

bigcartoonyIIV I believe just to give you a "softer" take off. Not sure how else to describe it. Maybe the word would be a more controlled take off. Having it that plate on or off didn't really make that much difference. Would I do the mod again. Probably not.

I have been repairing my intake gasket,on my 4.3 v6 and I am debating if I want to cut it off, since the intake is out my engine. I would love more power, but I don't want to damage my engine. Is is effective if I grind half of it off?

bigcartoonyIIV This mod won't damage anything. The only thing it effects is right off idle. You can feel a little more punch right as you take off. To me it's not worth it. I would either take it completely off or leave it.

If you look at other throttle bodies, they may have a hump in front of the bottom part there. Ls1 throttle bodies have this hump for a more linear throttle response. You can gain flow by porting the hump out. That being said I believe this piece on the throttle body blade has the same effect, making part throttle more smooth, but taking away from response and flow.

mossman381 i i did this mod on my 4.3 and i dont like it... all it does is make the throttle jump off the hop from the sudden rush of air into the motor vs controlled release ... horrible mod if you drive a 2wd s10 in the winter and need very sensitive throttle on ice or being stuck trying to rock it.... if you wanna punch the throttle every time you take off get this mod....

To smooth out acceleration from a closed throttle. For pussy foot drivers

I am not sure I would do that. It will leak air when the throttle is closed. Why not just do it the way I show? Then you know it will work.

@@mossman381 my diffuser was bent off I'm going to have to find the proper size rivets for it it runs but it runs at 3,000 RPM if I cover the two holes and control the throttle it runs perfectly

I will strap it on the dyno tonight and get the results......... You don't actually get more HP. It just feels like it when you first hit the gas because the deflector isn't restricting air anymore. It's was designed that way for smoother starts.

It's not because of more air, it's because of more weight on the plate, likely slows down the tip in. So you might get a jerkier, jumpier throttle but the truck isn't the slightest bit faster because it's not making any more horsepower. Because it's not flowing any more air. Because that is not the choke point anyway.

I was wondering that when I was cleaning mine. They don't' make that " LIP " on the Lawn Mowers and Big Trucks

+Clearanceman2 changing the torque curve will make a vehicle faster. That is what this modification does.

@@xingcho5988 the butt Dyno. as long as it sounds fast it must be. Just buy a throttle plate.

It sure does po171 code and po174

@@67thecrow idk, I went ahead and did it. 2 weeks now and no codes. Definitely makes a difference. It's snappier from stop.

Not really needed, but can't hurt. Autozone has it.

Because then you will have holes that you will need to plug somehow.

mossman381 That’s what I thought you would say. I’m pretty sure that I can plug the holes. I do not want to cut it off because of the intense heat that the grinding wheel causes.. Good video Sir.

@@schism420420 That piece is so thin it doesn't take much to cut it. Make sure whatever you use to plug the holes doesn't fall off.

This will not cause any check engine lights.

@@mossman381 mossman, you are not an engineer. Merely relaying bad information to unsuspecting 4.3 owners looking for a way to get more power out of a stock engine. Every reply, he is backing up the results with bandaids, hoping to keep your *mod* intact. Simply, it does not work. Your engine lights will come on. Your engine will throw codes. It will ruin parts. It's nothing more than snake oil.

@@umarkedreturn8776 You are a complete moron. This mod does exactly what I say it does. Your truck is either junk or you messed it up when you did the mod incorrectly.

No need to be scared of this mod. It won't wreck anything. Your truck will feel a little snappier right as you push the gas. If you drive on winter roads just be aware of that when driving on slippery roads.

This mod will not cause any bad things to happen unless you mess something up doing the mod. Is it worth all the work? If you want to feel every bit of performance out of your truck, then yes it's probably worth it. You can feel a difference when you first hit the gas. I have another S10 and I haven't done this mod. I don't think it's worth the work. If your truck is worn out and not running right to begin with you might not feel any gain.

+Blake Chesla I am sure that GM played with all the options before going into production. To me this mod really isn't worth the effort. If you want to try taking half of it off let me know how it goes.

GM placed this restrictor on the throttle body to lower the Horse power out put to save on transmission warranty claims , this mod is free and quite frankly a bigger performance jump then adding cold air intake headers and exaust and removing cats its that big of a difference ... you are basically adding 30-40% more air flow to engine this is turbo charger or super charger territory here its THAT big of an improvement

I would not do that. You will have air leakage.

I think they wanted to smooth out the take off.

@@mossman381 great thanks

Sounds like you might have an air leak. Intake gaskets or somewhere else.

​@mossman381 you're absolutely right, I put the intake back on but didn't reconnect the breather hose.🤦🏿‍♂️🤦🏿‍♂️ THANK YOU!

@@Psychonautic_Shadow Glad to help.

You have to be more careful for sure.

You can feel it at take off. If you have winter with snow take it easy.

Hell I wish I could see snow. I live in South East north Carolina. Have you put a programmer or a tune on your s10?

Truck was completely stock.

Because I did it this way. I didn't want anything falling into the motor so I left the factory rivets.

+Chase Tinsley - Yea I was thinking of that too, but I guess he's right. I am thinking to do this on mine. I am on a Horse Power Journey and I took most stuff out of our Truck / Car. I have a few Vids on my Channel and I really want to do this, LOL.

Drilled mine. Put in rivets with hand tool.

+S4v4geBeast - Yea, I thought of that too, using rivets to fill in the hole. Also, drill it out, if you don't like it. You can always " Rivet " back easily. Cutting would be a one time thing, and once its gone, it's gone for good ://.

Would work up to a certain degree of throttle opening then would still inhibit airflow after up to wide open throttle. Still an interesting idea though.

@@Sski85 ya good call on that one! 😂

@@Sski85 just opens up and then suddenly gutless 😂

Maybe a little bit more horsepower but what it really does it make the throttle more sensitive so you can slam the gas and revs up quicker

Only effects off idle performance so it shouldn't do anything to mileage.

pues un poco mas de fuersa al pisar el acelerador porke esta entrando mas aire , en pocas palabras te va ayudar cuando le pisas te va a rasionar mas rapido

muchas gracias ya le hice la modificación responde mucho mejor en ralentí y en aceleraciones para rebasar o incrementar la velocidad tuve que reiniciar la ecu con un escaner para que funcionaran los nuevos valores.

Hola amigo aparte de cortar que mas ay que aser ? Tengo una Silverado v6 1997 ayuda Porfavor

This mod does not mess with the EGR. It does add more air right off idle. Your computer knows all about that extra air. I am not sure how people come up with these weird conclusions. You have a new ping because of something else you did. Not this mod.

I gave you a real good thumbs down for such a lame comment.

I have only done it on GM trucks.

That is odd. I never had any problems.

Sounds like I have to re learn my throttle body. I hope. Or it's the throttle position sensor

If you drilled the rivits out toss it away and get another one. Part of the air deflector stays and so do the rivits without the rivits it idles way to high.

That other hole roughly place between the rivets is your idle air inlet. That's why you only cut the lip off! With the IAC valve & throttle completely closed, your engine should idle around 600 (or @ least under 1000) rpm after warm up. When you drill the rivets out, you now have 3 HUGE HOLES causing your engine to idle high. Beyond what your IAC vavle can actually control. I did this to my 1st 2wd 5 speed 01 Blazer and loved it... Helped me destroy the rear diff that still sits in my garage till this day. Not sure if I'll do this on my 4x4 5 speed

Not sure.

I had this off because I was changing an intake gasket so I did the mod.

This mod won't cause a high idle issue. You have something else wrong.

@@mossman381 mod is done and the valve seems to be sticking slightly and taks awhile to got back to idle..... carb cleaner?

@@spencerirwin6892 If the butterfly is sticking you can adjust it slightly so it doesn't go back so far and get stuck with the stop screw.

@Spencer Irwin Might have cut the rivet out in the center, doing this will cause a high idle. Uneven and misaligned replacement of the blade will also cause high idle or in extreme situations a no start.

This does nothing but restrict air flow just as the gas is pressed. With it removed you get better off idle performance. There is no way this could hurt anything unless you drop parts down your intake.

U realize car manufacturers restrict performance for various reasons on consumer models ?

This mod doesn't give you engine codes. If the computer sees more air you get more fuel. If you are getting codes you messed something up doing the mod.

The check engine light come on right after you did the mod? How did you do the mod? Did you drill out the rivets and leave the open holes? Not sure how else you could have put your original piece back on.

@@mossman381 the only thing I shave out of the plate was the over lip did nothing on top I don’t know what else I could had messed up

This mod doesn't do anything but add a little more air flow just as you push the throttle pedal. The computer should be able to compensate for the added flow. Did you check codes before the mod. Codes can sit in the computer for a while. You sure those codes weren't older ones? Did you clear them and see if they come back?

@@mossman381 no codes before I reinstalled the plate again I did nothing other than take that little piece off the plate

Scott miller You don't use up your grinding discs?

+milldabeast519 Yes it will help throttle response, that's what I got from this mod on my 97' Blazer.

+Jay DePonty i did it ... didnt really like it tho

What didn't you like about it?

milldabeast519 what changed? did it give you better response or no?

No difference really. Throttle plate was kinda sticking at first so I thought it was a little more snappy but it was really just the throttle plate jumping... coulp3 weeks later was back to same old...

It's there so when you push the gas it's more predictable and gradually makes power. This mod will give you the power much quicker. I believe GM was thinking in snow climates this would help and it does.

Companys like k&n,flowmaster,msd, Holley exist because they improve factory stuff. Auto Engineers dont have everything right 100% of the time.

The *lip* on the throttle plate is there to give you low end torque when starting out. When you remove or alter the plate, you lose the low end torque, use more fuel, throw codes, ruin your cats, and your 02 sensors. The maker of the video should have put in the caveat *Do at your own risk*. Now, and even years ago, the maker of the video says that "It is not worth doing and would not do it" so what does that tell you?

@@umarkedreturn8776 get rid of the cats too that helps a lot

@@umarkedreturn8776 you earned a thumbs down for that nonsense.

Keith Bartlett There are many different ways to do most things. This is the way I did it. I don't like the idea of using tape. I know the kind of tape you are talking about but I don't think it is designed for use in engines.

mossman381 I think mossman381 did best by cutting it off. You never know if the aluminum tape is going to stay put. You dont want that shit being sucked into your engine.

Keith Bartlett If you do this on the vehicle, you take entirely too many chances of getting metal particles into the intake. Its always best to remove a part when doing something like this.

That's hacked up. The plate also has an air orfice in it, and the hole in the TB is larger than it has to be without it. And metal tape over the rivet holes??? Can't imagine that ever failing...

cutting it off is best method your method is a ticking time bomb as that tape in some point in the future is destined to travel into the engine when it comes loose and possibly doing damage to your internals at very least you will have air going into the engine that is not metered by the IAC valve causing idle issues at very least

It restricts air flow just as you push on the gas.

Designed to give more progressive throttle feel, so more controllable at low throttle, i.e. it doesn't just take off. An eccentric cam on the throttle cable lever would be a far more efficient means of achieving same aim, without restricting throttle body when foot down.

@@matthewjenkins1161 but then it would be hard to modify

Scott miller If it's still usable why not use it?

Hmmmmm Really ???

u gotta disconnect the battery when u do it to reset the ecu

@@dylantemple7426 BS from non-engineering types. Disconnecting the battery has no effect and will not reset your ECU.

I noticed a difference. Your truck probably has other issues or problems that don't allow you to feel much of a difference because it's not running that great.

@@mossman381 Bro do what 🤣🤣🤣 My shit is stupid clean! Well maintained. I’ve only driven it 1900 miles in 7 years

@@mossman381 I’ll dm you a 55-95 roll. It runs flawless. I just didn’t notice a change after cutting mine off

Maybe you didn't notice a difference because you never drive it. It should feel a bit more snappy right as you hit the gas.