kllrvet

iTrader: (4)

So I was looking at the final dyno run for my car, and noticed it had a significant dip in power at 3200 rpm. The run was started at about 2200rpm, and was at WOT the entire run:



I decided to strike a line across the dip, at it looks like about a 60+ lb/ft, and about a 40rwhp dip!




I have been told this is normal for a cammed LS car, but I cant find many charts staring early enough to show much.

Anyone have any input on this?

2006 LS7
Mods:
Stock heads milled .030 with solid stainless exhaust valves
Stock intake
Ragin racin Punisher cam 236/256 .660/.660
Complimenting springs with Ti retainers
Morel linkbar lifters
Smith Brothers 3/8 pushrods
Ported throttle body
Mahle 11.5:1 compression forged pistons
Vararam
LG 1 3/4 headers
No cats


Thanks in advance

Tony

RAMPANT

iTrader: (17)

I had a similar dip with my motor at a slightly higher rpm. though with mine I think we needed to play with the AFR as it dipped richer in the same spot.

In fact I have the heads and cam from Stage 7s first combo and we had nearly identical dips in the curve.

Do you happen to have a copy with AFR on the graph?

I think cams do create this type of thing though I do not know the cause. Hopefully someone who does know can comment.

Mine:



Stage 7s, same cam and heads. I notice his has the same AFR dip as well. Making way more power though.

kllrvet

iTrader: (4)

It may be the cam. I found this dyno chart on Ragin Racin's site, it's the same cam, with a similar dip: