Weird dip in power with Punisher cam...
#1
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Weird dip in power with Punisher cam...
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
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
#2
10 Second Club
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.
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.