HOW MUCH POWER DO TUNNEL RAMS MAKE? HOLLEY HI RAM TEST-CARB VS EFI-WHO MAKES MORE HP? DIY, HOW TO 

Still get more with a big single 4bbl! Seen Nelson Racing Engines test the difference on a build they were doing. Also learned from them you gain like 100+ horsepower with long tube headers over zoomies! That was on a 2500hp motor, but still.

Go for it!

he's not a dyno guy

I really enjoyed my LS7 headed LSX 427 ci you see in my profile pic. You could probably run a smaller cam without sacrificing much power.

what do the LS7 heads cost?

It all really depends on cost. Stock used with rockers probably $1,500.

Richard mentioned his 495 build in the vid. I got to go back and read that article again. The LS platform is soooo cool

Carbs alot simpler and easier to dial in than efi...I agree carbs rock dude!!! ⁸

Glad to help

first problem he is using a engine that likes boost not a tunnel ram u need high compression for a tunnel ram the higher the better i run 13.5 to 1 for my tunnel ram on a pro built engine i get over 1200 hp on pump gas on a 327 but it is really built and the carb test he had it over carb no balance with the fuel makes a big different i lost 400 hp just because i had it over carb running 2 650 had to drop to 485 carbs gained a lot first thing u need to blue print it then build it not just through parts on it very very bad test .

@@jeffrey4547 1200hp out of a NA 327ci with 13.5:1 on pump gas? 3.6hp per CI is amazing. I’d love to see a video of that thing running.

Boost is boost, I'm wanting to see some more volatile fuels used , can't really call it the big bang without nitromethane.

please see the three videos where i ran turbo, twin screw, roots and centrifugal blower on the same motor

@@richardholdener1727 yeah, but did you spool the huge oversized turbo up with a small hit of N20? Hehehehe

Volvo XC90 t8.2018ish ... Is electric , turbo and supercharged. A Dream SUV of mine forsure.

Cooler and denser air/ fuel charge temp contributed to power gain with carbs over efi..

NEEDS A TIGHTER LSA CAM

from what i've heard, which is all anecdotal. Stock LS cranks don't enjoy boost over a long period.

if it has good heads to match-then twin 750s (with a high stall) or 650s

boost

@@richardholdener1727 hey, thanks for the reply! I am currently locked down in p.e.i Canada, not one single dyno on this island so I would need to be able to street tune it myself. I wouldn't mind trying it but the base tune would be the hardest part I think. The factory ecu in these cars are trash so I'd have to start from scratch I think.

I'm surprised more guys don't go for the longer strokes. Aftermarket blocks or sleeves aren't cheap. I guess that is the reason

Carbs by virtue of where the fuel is sprayed often add a cooling element to combustion. Efi fuel is often hotter

You running Ls3 heads on that 418ci? I made 622rwhp and 550 tq with a 418 and Frankenstein heads e85 and fast 102mm

@@sic7camaro ls7 heads

What rwhp are you running ?

@@sic7camaro 575whp

What? 😂

@@johnyfrankendub No trolling im txts on my roof jobs. you dont even have a race car or fool with hot rodding . Take trolls to another youtube page

@@god1st.530 ok? You don't even know me, but best of luck on your roofing jobs, bud. Gobbless

@@johnyfrankendub ok man God bleas you too

check out the ls7 head test video-its there

Just did and thanks for doing that test too

what fuel

@@richardholdener1727 alcohol or methyl alcohol

the front mount flows and makes less than the dual quad top

@@richardholdener1727 Thanks for the info but I was more thinking about the comparison ls for a fuel injected engine. I’m buying one for my small block ford and will need a new hood to clear a front mount but the side mount fits fine. I was curious to see if the front mount flows any better to make it worth it.

With blow through carbs

Funny that on a 1969 440 a tunnel ram is long runner but on an LS3 it's short runners!!! I was expecting increases in low end power on this test when he switched to the tunnel ram but it lost low end. Then I realized the LS3 intake has longer runners than the tunnel ram. Cool test for sure!

Carb and tbi will produce very similar results. Port efi power will be down slightly but drivability will improve.

@@177SCmaro probably, but its possible that the tbi makes the most power due to not having a restriction that a carburetor has to have to pull fuel but still has the air charge cooling effect. and because its fuel injection you get a more stable AF ratio so lower torque numbers should be better then the carb set up, but is it as good as the port injection? actually testing all 3 would show it so we dont have to speculate

@@DBLDREW Port efi when you want more precision, carb or tbi when you want a little more power. Probably the best set up would involve port efi for start up, idle and cruising and then adding in injectors just downstream of the throttle body to cool the charge on manifold designed to be "wet" but this is a lot of added cost and complexity/tuning for a relatively small power gain (only about 20hp on a 700hp engine). The restriction of the venturi on a correctly sized carb is negligible in most cases (especially dual carburetors), but still worth noting.

@@177SCmaro a 20hp gain is not a small amount. But only one way to find out what it really is.. this is where @Richard Holdener comes in.. why speculate when you can dyno it and know

@@DBLDREW On a 700+hp engine 20 hp is relatively small, ~3%. Atmospheric conditions can make a bigger difference. It's not really necessary to test. In this video they tested efi vs carburetors on the same intake. tbi is going to be very similar to a carb(s). Again, venturi on a properly sized carb cost negligible hp relative to efi. So long as carbs are "big enough" a comparable efi tb without venturi doesn't do much, if anything. In other words, if an engine at a particular power only needs, say, 800cfm then putting a 1500cfm tb on it isn't going to do much, if anything.

NO IDEA ON JETTING FOR ALCOHOL

YES

Consistently

TAKE A LOOK AT THE LS3 INTAKE TEST

@@richardholdener1727 if anything the LS7 intake is worse below 6k rpm.

He doesn't want to hurt the dyno.

AT LEAST

this test motor was a 468-I also built and tested a 495 stroker ls

@@richardholdener1727 I thought. so awesome show it's great naledge and learning show thanks for your time

dyno cable

LONG RUNNERS ALWAYS WORK BETTER ON STOCK MOTORS

@@richardholdener1727 that’s what I’ve always read or heard too, just curious because I’ve seen a stock internals SS 8L80 racing on a RU-vid channel with a hi ram and headers and other bolt ons and it runs good but I just don’t see the logic in that intake with no cam or head work, etc.

That would be dope

that's tbi

@@richardholdener1727 yes it is any ideas I don't want to buy a diesel truck

What heads?

YES-WHAT HEADS

@@8power857 AFR 2.02's alum CNC'd

@@mikev.7361 the cam will be the limiting factor her but will still be nice, around 390hp on the engine dyno, 360 ish in the car, 260-280 at the wheels. Depends on a lot of differing factors of course!

@@8power857 Ya, I'm putting a blower or turbo later on down the road once I break it in properly and I can afford it...

i tested all the comp cams on the 2v-you can get the cam info there

HOW MANY AFTER MARKET CAMS ARE AVAILABLE FOR THE NISSAN?

@@richardholdener1727 my point exactly! The LS is getting all the attention and aftermarket support right now, but it's still limited by it's pushrods. The VE56 has more "junkyard turbo" potential than a 5.3L LS in my eyes, as long as the bottom e d holds together.

If the VE56 got the same attention as the LS then the Nissan 5.6 "should" outperform even a 6L LS. It's also in a WIDE variety of their service and consumer vehicles....... Richard.... Please turbo a junkyard Nissan 5.6.

I thought the same thing. On this combo, it seems to work pretty well

I WOULD NEED TO TEST THROTTLE BODIES ON THE DUAL QUAD HIGH RAM TO BE SURE

@@richardholdener1727 That would be a good test. I know some of that gain is charge cooling, but I dont think all 20 hp is.

the 8000 rpm motor was a 347

i did

Do they run the same rocker ratio?

depends on power by 850 or 950 will work

@@richardholdener1727 I was thinking a nice 850 would be good 👍 but if I ever got a bigger cam then 950 would be the one I would go with. Thanks for your thoughts I appreciate your time.!!!!

we used a dual quad linkage from Holley

@@richardholdener1727 thanks Will Sparkman

WATCH THE LS INTAKE TEST VIDEOS

no

Not going to doubt you with less money and headaches to a naturally aspirated coyote 5.2 will need to turn 9200rpm to do so so I'm thinking it better be put together right using the most expensive highest quality parts available to do so and even then it will not touch these torque numbers these engines are making better off with the Ford new gas 7.3 truck motor it will be much more simple more cost effective and make way more torque than a 5.2 coyote but your entitled to your opinion and it will be more reliable and last longer than these engines the 5.2 coyote will be turning 9200rpm and the engines in the video turn 7200rpm think about it logically even if you made this kind of power with a 5.2 coyote engine it would be a edgy engine and wouldn't last very long and would wear out quickly turning this kind of rpm

NOT THERE YET

"Beer 30"? Hell, it's "Quarter to rum"!!

@@vincentrobinette1507 Five To Whiskey (For The Win)

some

Really most engines making this kind of power aren't going to be daily driven it's going to be going in something lighter 3800 pounds or less even this setup with the lowest low end torque will have plenty of torque for street driving and l could be wrong but running this kind of engine without at least a 3000rpm to 4500rpm stall converter and 4.10 gears or more would be pretty much a waste of time you'll only be worried about the power were the converter engages say 4000rpm to redline 7200rpm the most average torque and horsepower throughout this powerband probably wins but peak numbers look good not to many street cars driving around have this kind of power as these setups tested big bore and stroke power and big horsepower numbers

I know LS3 heads rectangular port heads compared to cathedral port heads like LS2 or LS1 heads with all things equal same engine the LS3 will be down torque slightly below 3500rpm but generally the LS3 head will make more torque 4500rpm and up and more horsepower 5000rpm and up but I'm talking engines much more tame than in this video under 550 horsepower and 6.0 or 6.2 liters much more likely to see something like this street driving or cruising around than something making 650-750 naturally aspirated horsepower monster

no sir

I did-IT MAKES LESS THAN THE CARBS

I’m talking about the Holley efi sniper dual throttle body on the high ram. Injectors in the throttle body.

then look at the other 300-400 videos on non ls stuff

cold fuel helps

A cold fuel test would be good. I would also like to know if cooling the fuel allows you to run more compression before detonation? There is a couple of tests for you.