L76/L92 low on power
L76/L92 low on power Just finished the install, put it on the dyno and was very disappointed with the results. Ported LS3 heads, high compression 6.0 with an EPS 232/242 cam and only made 435/409. It idles fine, but will shake pretty good and then smooth out a little through out the pull. None of my other motors have ever had a shake like that. My tuner seems to think I have a cylinder out, but I cant find anything. I did swap the a and c pins on the cam sensor so the tach would work. I attached the dyno sheet to see if you guys may have some input. what really baffled me was the tq dip at the start of every pull.
plenty, I have valve reliefs
yes and it was locked
yes and it was locked
plenty, I have valve reliefs
yes and it was locked
I will try and upload what I have tomorrow
I will try and upload what I have tomorrow
TECH Enthusiast
Joined: Jan 2010
Posts: 578
Likes: 4
From: REALITY
Just finished the install, put it on the dyno and was very disappointed with the results. Ported LS3 heads, high compression 6.0 with an EPS 232/242 cam and only made 435/409. It idles fine, but will shake pretty good and then smooth out a little through out the pull. None of my other motors have ever had a shake like that. My tuner seems to think I have a cylinder out, but I cant find anything. I did swap the a and c pins on the cam sensor so the tach would work. I attached the dyno sheet to see if you guys may have some input. what really baffled me was the tq dip at the start of every pull.
I have seen a certain group of guys specing these high overlap cams here lately and all of the guys that have these similar cams do not produce the power they should and and they complain after due to the fact that the camshaft timing events do not compliment the LS3/L92 heads.
PHP Code:
The converter was locked during the entire run? Why? Do you have a 5-disc lockup that can handle that low-rpm TQ without slipping?
FWIW, when I dyno'd my 427sbc/4000stall, the dyno wouldn't even register below 4500rpms.
Why did you stop the dyno at 6000rpms? Wasn't the valvetrain upgraded along with everything else? That cam/head combo should still be making power to 7000+
Need to look at the scans for converter slippage, knock, rich/lean, etc.. Is your "tuner" well versed in GenIV ?
Last edited by 85MikeTPI; Oct 25, 2012 at 11:32 AM.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
I hate to say it but WRONG CAM.
I have seen a certain group of guys specing these high overlap cams here lately and all of the guys that have these similar cams do not produce the power they should and and they complain after due to the fact that the camshaft timing events do not compliment the LS3/L92 heads.
I have seen a certain group of guys specing these high overlap cams here lately and all of the guys that have these similar cams do not produce the power they should and and they complain after due to the fact that the camshaft timing events do not compliment the LS3/L92 heads.
