@@bigboreracing356 you can't be sure of that. Bore and stroke are different, head flow, cam design are all different. My custom lsx454 with ported stock LS7 heads makes about 700 crank hp. Its a bit better than the crate 454lsx but not by much. I haven't looked into a typical 454 bbc crate but im sure there are different options. Would be an awesome test none the less
@@bigboreracing356 oh I know and I agree. I just think overall it would be such a fun test to show how technology has advanced over the years. Richard could break it down by comparing rotating weight, bore/stroke, cylinder head size like port volumes, combustion chambers, valves, rockers, port flow, compression ratio, and like you said BSFC, not to mention engine weight/size. I would love to see that test. Basically a new style big inch small block vs an old style smaller cubic inch big block.
No Prep Stretch Definitely more or less on your own cranking up Mercedes in the us. I drive mine everyday though and having double stock power sure makes it more enjoyable.😎 If time and money were available I would love to see what one of those old 70’s 450sel 6.9l to see what could be done with one. Talk about #theotherguys
I like the little chat. As a generation X person raised when a 225 hp 5.0 Mustang was considered "quick" from the factory, these are amazing times to be alive and a gearhead.
@@JohnsonPortWorx That is so true. I goofed around in the Super Chevy/ Popular Hotrodding quick street car races. I ran 11.10 and made the top 8! 1st rd was not good racing a 9 second car lol
@@AB-80X It was a bit down for sure. These days just about every thing is quicker than it was, so we are a bit spoiled. 1989-1993 era me would be super excited if I was told in 2020 you could buy car with over 700 hp from the dealerships with warranty.
Richard Holdener. What happened to the old Buick torque monster? Just wondering. I'm so excited to see more. That 671/dual 950's with that 455 would be nice to see🤔👍
I LOVE the fact that with you, it's not a Chevy or a Ford or a Mopar, or an import, or NA, or turbo, or supercharger, or nitrous, or cam, or heads, or headers, than show you are the fastest. It's the time slip.
Richard is trying to bring us all together. He’s doing more than teaching us about engines. We’re all in this together and we can all learn from each other.
Your objectivity to anything that us car enthusiasts can enjoy that you elaborated on for the first 5 minutes is one of the many reasons this is an excellent channel and why I subscribed.
We need more of this! Perhaps an 8-71 on a stock bottom 6.0 and see what MAX power it can make. That would be cool and I bet it would surprise some people. Maybe compare it to the p1x or sumn.
You're intro ..well said my friend ! And a reminder to all that what is available today is an evolution of the past. Had the previous generation not done and learnt what they did, then we wouldn't have the technology of today. Blowers rock!😉
Preach it brother! Totally agree, there’s too much good in this world to be focused on the minutia. We all want the same thing and there’s different ways to get there, one of the things that makes this country exceptional!!
best to make a very powerful na motor, then add the roots blower to allow it to make 1000 hp at a lower boost, where this type of blower is more efficient
We should start calling blowers The Hot Rodders Bacon. Just like the real thing, it makes everything you put it on BETTER. Those "curves" looked AMAZING for something to be street driven.
Richard is the BOMB !!! Crank that boost up to at least 12-14 lbs. I think you can make 900+ I have LSX with a CARB... some people hate it. I love it! And I go 10s NA.
Preach brother, there will always be something more powerful down the road. The hobby is big enough for flatheads to electric motors to be appreciated.
I agree! LS engines are great. I have one in my truck, it’s fast, it makes great power. But I also have a 2.2L, and instead of swapping it for another LS I’m also going to make it fast😁 because like you said there’s more then one way to make power and have fun👍🏼
It is hard to over-carb a roots blower. At 7.3lbs, you're pushing in about 1.5 times atmosphere - so effectively 383x1.5=575cid. A true 575 would have no problem using 2x 950cfm on the right manifold/head/cam combo.
You are the MAN. SUPER Thankful for your content. Always looking for your next video. There's something to be said about what you provide for the community. You provide tried and true evidence of what certain combinations of engines and components provide for the person who doesn't care what everyone thinks is "cool". Thank you for what you do! I'm sure I'm not the first nor the last to appreciate this fact. Take care, brother!
That is some serious work to test all those different configurations. 👍 If you modify your car and you are happy about it, you succeeded in my opinion.
@@doughuncklerspeedgangster7061 hey really was NASCAR that came from the moonshiners but I just thought you was getting farfetch with what he was saying
Coming back from WW2 , being taught about, and working with all that technology-- like V-12s, turbochargers in the P-38, etc.. And hey, a drop tank makes a great body for a dry lakes car. They passed those enthusiasms on to their kids.
To me, and after seeing the old school go to new school, the new school tech has allowed truly streetable, reliable and relatively inexpensive 1000hp engines to exist. Race engines are now undercammed truck engines.....all the moderns have race blocks and race heads from the factory. 6 bolt mains and high flow heads were unheard of 30 years ago.
I’m 38 and feel like I’m in the middle. I grew up around SBC and BBC then the LS came out but was really only in F bodies and Vettes. When everyone caught on that the truck engines were almost the same it was still too expensive to play with. Now “LS” is just like the SBC the parts are everywhere, cheap and the aftermarket is huge and they are even more reliable and the SBC was a standard of n hot rodding reliability. long story short I like the old school and new school.
Richard, yet another question. Where did you end up timing wise? Normal SBC timing curves still seem to end quite high on roots blower vs turbo. Still the case with LS?
I wonder how this thing would perform with the blower and a throttle body Injection setup to be able to keep all the benefits of fuel injection as far as for tuning potential.
Maybe next video, wait for the caffeine to wear off a little bit?...lol. Gotta love these Big blower tests...because I would never do it, but you'll see it here! Keep em coming, we're watching!
The boomers were young when muscle cars came out. Millennials are young now that we're in the baddest horsepower war ever! At the end of the day, Richard is right. It would be in our best interest to do what we do, because we love doing it. If you're always in a competitive mood, you're going to deny yourself the ability to enjoy the full ability of whatever it is you've built. On a side note, holy crap, an LS rocks with a 6-71
I am a millenial and I work with a person considered as a boomer. We get along much better than with younger people (like middle-age as my parents are) Maybe it comes from that that I spent so much time with my grandad as he taught me like everything from surviving skills to car building. 😃
I agree with him on needing to stick together because I have built alot of fast cars out of asking for favors to looking through people's old parts bins who cares what it is use what you got and make your car fast and embarrass some people at a stoplight..... Still waiting on the caddilac 500 motor to I have always wanted to build one
Try with E-85 the blower needs that kind of cooling never pump gas again when dealing with blower the E85 will act as a intercooler and pick back up more horse while being reliable 💯.. Blower should never be recommended with regular gas for the lack of a Intercooler... Even if you 9:2:1 on the Motor Procharger and other come with intercooler so pump gas is super reliable on those Applications... Blower Applications should always Run either E-85, methanol or race gas only if you wanna make real power while being reliable 😎
Thanks for another great video. Just curious as to why you didn't use the speedmaster I-beam race rods with this combo? You obviously trusted the 4340 crank from them and the rods are way less expensive as well. Thoughts?? TYVM!
@Michael Teeple people are making 1500hp with blown flatheads. Not sure what is takes to make that or even if it's on a stock block. But it is possible to make crazy power with the flathead ford design
Speaking different ways of doing things I put a 5.0 Coyote in a 2ed gen Camaro just because I was bored of small blocks and an LS swap wasn't weird enough. 😁
@@bigboreracing356 Nice. Your one of the guys I'm getting revenge on though - everyone who's ever stuck a chevy in a ford I got a ford in my chevy lol.
@@bigboreracing356 You don't have to justify anything 👍. I'm just saying it sometimes bothers the Ford guys to see all these Chevy swaps into fox body Mustangs so here's a little revenge for the blue oval boys. I'm not a brand loyal guy either. These things are glorified air pumps, they don't care what name is on valve cover so why should I, ya know? 😁
Funny you did this bcz ive been wondering if I could build LSX engine to 526ci & then run same Blower setup as my Pro Mod runs which is Fowler F11 Extreme, carbon hat w/a spacer..Since they make LSX type engines with Turbos pushing 3000+Hp, I figure IF I could make LSX of same basic size as my 14*degree symmetrical big chief w/a KB Olds block..Figured same size engine w/the characteristics of LSX with great heads, How can it NOT make similar power? Everybody w/a Roots Type Blower now is switching to HEMI, pretty much bcz of RPM, limits of Olds BBC Is there valve train at Hi-RPM where the problem hits..When engine like mine is pretty much limited to 9500rpm yet a similar HEMI engine can easily roll to almost 12000rpm! Now w/a Billet Rotor Hi-Heliex Fowler F11, at same overdrive level but now spinning another aprox 3000rpms, Imagine how much more booste especially at that engine speed will be achieved? IDK how much of difference between the 2 engines wud be solved by hi rpm boost but to go by other guys running Blown Alcohol Hemi's which are going into 3.60s & PSI screws that are running in 3.40s at 221mph in 660ft😳.So if anybody would know would be you..Also, why not use Hi-Heliex Blower? Maks Way More Power, taks less then 1/2 amount power to run Blower & the intake charge is Significantly Better bcz of heat reduction again which is significant, some why not try "Blower 2 Blower" comparison to 60degree cast rotor blower, 120degree Hi-Heliex billet rotor design & Then a Procharger, Atleast 136 prefer 140 for max power tests but most guys were using 136 Procharger..Then we'd all know kinda power differences are made w/a Roots, Hi-Heliex & Procharger combo on any given engine, And Id personally like to know IF I Could run LSX in 526ci range? I think LSX would have better power bcz they have ability to Rev higher which would spin Blower faster at same overdrive Or I THINK things would go that way..I maybe thinking on completely different level of thougt to this then avg car guy would, they dont know what Hi-Heliex even is😮, so this would be good information for them all to have aswell😁🐾.Oh thanks for channel, I pretty much just trust what you say & prob what Steve Morris says over most others who build & test these engine videos....
Hey Richard what happened to the "Other Guys"? I am looking forward to seeing that Buick 455 hopped up and the inline straight 6 engine reach its full potential.
Richard, is there any down side to using an internal wastegated turbo vs the same size with an external? And when will you have merch? Shirts, cups or anything with your wrong cam and dynosaur on them?
I love watching your videos, I'm still waiting for a video on the power plant I would love to put in my project, any guess on what that is? Lol let's say it won't be cheap lol
Hey Richard, love the channel. I don’t think runner length will make much difference when using boost. Could be tested with blow thru carb and a turbo.
I'm building an LM7 to be a 383 as we speak. I think I've got it all figured out, but any advice specific to doing the 383? I know a lot of guys talk about issues with piston rock at BDC with the 4" stroke. (Before y'all say it, yes I know a 408 build / anything LQ4/LQ9 would have been more cost efficient. I just want to do something different and I'm not looking for boost either.)
Hey! On that ls blower set up what pully crank hub did you use? Did u have to add or fab a new keyway? Im installing a 671 on a 6.0 but hub fits loosely it just spins on crank.....what do i do?!?
@@richardholdener1727 yes thank you for ur response! I apologize the sec i sent that comment i watched another one of ur vids ware u did just that. Thanks again! Who's a fan of richard holderner.....this guy!
Is there a rough formula for runner length? Ie x length to make power at y-z rpm or is it completely dependent on displacement, chamber & port volume, cam lift/duration etc of your combination?
Hey Richard, horsepower was still climbing why didn't you run it to 7000? Also, in my experience running roots blower motors, the BLOWER is the limiting factor in ultimate power output. I've went to higher flowing heads before and ran nearly the exact ET and MPH, although boost went down. Only when I changed pulleys did the performance increase. I like it when you show the boost curve graphs as it shows where the boost begins to back up into the manifold and the camshaft/headflow becomes the limitation.
Richard, you are a very informative fellow and I like that you are out of the boa as well! But we’ve all heard a turbo ls, and supercharged ls. WE WANT TO HEAR A BLOWN LS!!! Please and thank you.
Hello I’m really hoping you could give me some advice.I have a 66 c10 that I’m building as of now it has ,what the casting numbers are telling ,me is a 80s model 350 4bolt from a van or truck and a 2 speed power glide.I recently purchased a th400 and am going to have it rebuilt and use it for daily driving. What I need advice on is I’m just looking for the cheapest way to make 400 to 500 hp should I keep the old 350 put heads and a cam should I pull it out and have it rebuilt into a 383 s. Or should I get an Ls short block and put a cam and carburetor intake on it (because I don’t want efi Trying to stay in the classic vibes) idk what’s the best bang for the buck pls consider engine life and durability thanks. Hope to see you in the inbox
Imagine huge displacement big block with modern tech like variable timing and GDI I'd be in heaven! I like LS and coyotes but I also like old school 'boomer' stuff too their stuff is what got me into cars in the first place
Richard, with Chevrolet having so many 3600 engines in everything now. From the Camaro to the traverse, I'd like to see you turbo one of those engines. Thanks
It's all great. An LS screaming at 8000+ has something special going on, just like the shotgun blast exhaust of a 14-71 blown 532 with 14:1 compression, or a Ford revving to 11+k. It's all fun, but I am probably a BBC guy at heart, and I'm not even an actual boomer. Hmmm, this begs the question. Boomer vs. Millies. Where do we late gen X'ers like you and me fit in?
Brother Richard, we got to hear these gems sing!!! I know that these older test and your showing us a career of knowledge. But please let us hear the Symphony of power. Ps. If that ends up on a shirt all i ask is a lil AJJ near it. 😆
I was just reading a thread on how to build a 560hp 383 SBC. Those guys were doing big cnc afr heads, 250* solid roller, 11.5:1 cr and JUST getting there. The 383ls you did here could be driving gramma to church and probably get decent gas mileage to boot.
how much power could the block take with that bore? going from 3.780 to 3.905 is a ton of bore. its like a 9th of a inch. would you be better off with a 3.80-3.840 bore at 1000+hp?
@@richardholdener1727 how would it do at like 1000-1200hp you think? with a boosted set up i dont really see a lot of benefit to going forged rotating assembly and $500 in block work if the block can't take 1200hp besides more low end power from more displacement. you kinda proved the turbo/blower flow rate is what limits hp as long as the motor will take it.
Datsun / Nissan RBs were never sold to N. America. Nissan's best engine historically. Over 5 decades of aftermarket tuning & modifications. & still revelant today.
@@ryanmalin you telling me. I would love a nice RB maybe 2.5L & a small turbo. Definitely one of Japan's epic engines. Currently building a SR20DETT & 5spd for a hilux.
Hey Richard holdner its joe the guy who keeps bugging you about the 429 ford I was wondering about cheap ways to get more power out of my 5.4L ford f150 already did headers ported the intake and throttle body 4 inch exhaust and cold air intake been looking for a stock 4.6 blower but if you have any cheap ideas let me know by the way the truck rips pretty good right now I'm just the guy who wants more lol
I remember growing up and dreaming about taking a old 350 SBC and making a proper stroked. Then the I'm older and have money and time and junkyard LS well make my $8k engine look sad. Never really though about making a LS stroked didn't know you could really do it. Any con rod clearance issues or bottom end stuff?
@S Gray TY We shall see what the junkyard god bestow upon me. One bonus of living in MT i wish I could trade some one some Chevy or ford cores for a Honda B16 core.
