Engine Dyno Testing LS3 Intakes INSIDE!!
it made 470rwhp@6000rpm with the l76 flattening off after 5000 w weak lifters and weak valve springs started floating mid 6000rpm
503rwhp@7200rpm better springs morell lifters single plane with ported edelbrock tight elbow
not exactly a L76 vs GMSP intake comparison but u still get an idea oh how the single plane performs in the rpm. i think the l76 would have thrown down some better numbers with the better springs and lifters
503rwhp@7200rpm better springs morell lifters single plane with ported edelbrock tight elbow
not exactly a L76 vs GMSP intake comparison but u still get an idea oh how the single plane performs in the rpm. i think the l76 would have thrown down some better numbers with the better springs and lifters
Hey Guys,
Don't want to hijack this, but I thought you all would like to see these results.
The bigger everywhere lines are the L92 truck manifold, the lower lines are a stock LS3!!!!
Talk about dissapointing. These are on a 427 with LS3 heads and a 230/240 cam. This is all through a 85mm descreened truck MAF.
I did notice that the truck intake was pegging the MAF sensor starting at 5800, the car manifold only did it above 6200!!!!
Don't want to hijack this, but I thought you all would like to see these results.
The bigger everywhere lines are the L92 truck manifold, the lower lines are a stock LS3!!!!
Talk about dissapointing. These are on a 427 with LS3 heads and a 230/240 cam. This is all through a 85mm descreened truck MAF.
I did notice that the truck intake was pegging the MAF sensor starting at 5800, the car manifold only did it above 6200!!!!
Either way - good news for me selling my LS2 truck intake!
-bob
TECH Regular
Joined: Sep 2008
Posts: 425
Likes: 1
From: Scottsdale, Arizona
When I was at the SEMA show I talked with the guys about the new FAST intakes. For my application he said that the truck manifold made 20+ more HP than the short version.
That was interesting to me.
That was interesting to me.
There are guys deep porting the truck intakes to get rid of the restriction. They are cutting these manifolds in 1/2 to do it. I'd like to see if one of these manifolds can be put in an f body, I've been told they just don't fit, even with cutting the cowl. 
Found the original thread I was referencing:
https://ls1tech.com/forums/generatio...omparison.html
In that, it stated the L92 truck intake flowed less than the car intake - the opposite of what was found in the tests above. It does make intuitive sense that a larger volume plenum will breath better - just an interesting disparity between dyno testing and airflow testing. In the end, power at the wheels will always trump airflow cards.
-Bob
https://ls1tech.com/forums/generatio...omparison.html
In that, it stated the L92 truck intake flowed less than the car intake - the opposite of what was found in the tests above. It does make intuitive sense that a larger volume plenum will breath better - just an interesting disparity between dyno testing and airflow testing. In the end, power at the wheels will always trump airflow cards.
-Bob
