Engine Dyno Testing LS3 Intakes INSIDE!!
10-16-2009, 09:11 PM
#41
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
10-28-2009, 04:26 PM
#42
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
11-14-2009, 09:36 AM
#43
TECH Regular
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.
11-14-2009, 10:16 AM
#44
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. 
11-17-2009, 01:46 PM
#45
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
