Hardtop00SS

iTrader: (17)

I just got the new issue of Chevy High Performance and it has a article that dyno's a bunch of intake manifolds on a stock 98 LS1 Crate Engine with only Hooker LT's and a raised rev limiter. The manifolds they tested were:

1. LS6 Intake
2. 6.0 Truck Intake
3. LSX Intake
4. Weiand/Lingenfelter

Base run with the LS1 intake was 419.7 HP/416 TQ. With the LS6 Intake, it jumped to 425.5 HP/421 TQ. The 6.0 Intake peaked at 427.9 HP/419 TQ. The LSX peaked at 426.2 HP/427 TQ. Last, but not least, the Weiand intake pushed out 411 HP/408.6 TQ! I guess the heak soak really does hurt the Weiand intake after all. I expected more out of the LSX, but a 1 HP difference between that and the LS6? I know what intake I'm buying! Just thought I'd post this up and get everybody's opinion on this.

Robbie

Kent1

Nice information on intake manifolds. For the money, it appears and seems that the LS6 is the best one for the price. How much does the 6.0 intake costs. I have the LS6 currently on my car and I guess it will stay there. cheers.....

Blacker

iTrader: (3)

I would like to see the same test on a H/C or cammed only car

verbs

1hp/6tq over an ls6 on a light bolt on car isn't that bad.....more importantly, what power gains are to be had under the curve, and not just at peak?

jrp

iTrader: (16)

exactly what i was going to say

BADFNZ-383

iTrader: (41)

I just got this issue, and they said in the next issue they will do the same test with a cam, and the issue after with a H/C

DaveSchott

iTrader: (5)

Good info to post.

Clearly the Weiand/Lingenfelter is a dog for some reason but unless they did a test where the air temp is measured at the intake port, the "why" is still unknown. Might very well be soak but air doesn't stay in the intake very long. I do know the gaskets and the fitment of the kit are also a PITA.

Good to know the ls6 is best bang for the buck. I wonder if some of the aftermarket hoods provide enough clearance for a truck intake.

AidanN20

This is a horrible test in my opinion for guys serious about making horsepower. Using a stock engine is like putting a tunnel ram with two dominators on a stock 396 bigblock with 8:1 compression and saying it doesnt make any more power than a performer rpm intake.

For any real world use, they should have done this test on a 320+ cfm headed, 230 duration+, full bolt on motor and seen which one put down the most in the 400+ rwhp range. a stock motor doesnt need an lsx, why compare using it.

lsx24

iTrader: (45)

Excellent! If we all write explainations to them, do you think they will include the SAE dyno graphs next time?

1Blown04

i think the problem lies in cowl clearance not hood clearance, the same reason we cant use magnachargers

CamTom12

iTrader: (1)

hehehehe https://ls1tech.com/forums//showthread.php?t=168311

SScam68

iTrader: (20)

Its called setting a baseline

Friday13th

iTrader: (6)

These intakes were not made with the intention of being used on a "stock" motor. They are best used on engines with modified heads. They are great for porting and matching the intake on heads. I highly recommend this intake on a set of Stage 2 and + heads.

You are correct in the fact that the air does not stay long in the intake very long. If you are running the car at the drags, it is as simple as icing it down after your run.

Some people have complained about a vacuum leak and that the inatke does not properly seal. When I installed my gaskets and intake it was as simple as adding a little extra RTV sealant. I have no leaks and no complaints. Check out some of our sponsors they will also recommend the same installation of these intakes. Talk with Bob at Exotic Performance.

Hope this helps clear up all the negative buzz about these. Oh BTW, if they weren't that good would John Lingenfelter have put his name on them????