tigercrazy718

ok so i got my car dynoed at hennessey performance during the supra nationals about a month ago. i got 204 at the wheels on what is apparently a conservative dyno. but the dyno graph showed some weird dip in hp towards my top end. the guys dynoing my car didnt know what was going on, but they were just shop grunts. my friend asked if i had something variable in my engine because thats what his graph looked like when he had a problem with his variable intake i think, but i dont know if i do or not. so im asking yall what do you think this is? is it my tune? should i contact doug about it? thanks!!



if yall need me to make this bigger i can

Torch_Vert

Nothing really variable (like cam timing) in the 4.0L

Is your car an automatic, and if so, was your car holding in one gear throughout the runs?

tigercrazy718

its a manual and it was in 4th
happened on both runs two
just to clarify there isnt a torque curve just 2 hp curves

Joshspony

Just to be clear, your signature says all you have for mods is duals and a 93 torque tune. Is that the tune you were using when you ran it? Are there any other mods on your car that haven't made it to the signature yet?

I am just wondering if ~204 rwhp is the norm with exhaust & 93 ___ tune/cai. I have been curious about my hp, but haven't made it to a dyno yet.

tigercrazy718

yup thats all the mods i got
magnflow exhaust
C&L intake
SCT tuner with a Bamachips 93 octane torque tune
i think with the race tune u get some more hp but im not 100% on that

Joshspony

cool, thats about the same setup I've got

Thanks

tigercrazy718

on some dynos u might make 210 from what ive heard because everyone there was saying the hennessey dyno is conservative
so anyone got any ideas? should i contact doug?

Joshspony

couldn't hurt, I'd send him an email or call and ask

Torch_Vert

Ditto. It looks a bit odd, and it's almost identical between the two runs. I'd send Doug a copy of the sheet and get his opinion.

tigercrazy718

ok guys so heres an update
i emailed some guys at bamachips, showed them the dyno sheet, and this is what they said:
Does the car give you any issues while driving? Is this issue noticeable then, or only on the dyno? It appears that it’s just something like a misfire. Might wanna try using a different wire for the tach signal lead when getting dyno’d. Double check all your plug wires and plugs.

now I cant tell if i can know the difference while driving. i think i can feel it but idk if i actually feel it or if im just imagining it because i know its there. so how do i check the plugs and plug wires? this is my 1st car so ive never had to do that before. and what do yall think of Dan's analysis?