flyguyvan

just got my car dynoed, and i was looking at the graph. theres a weird spike in torque, or if you look at it another way, a big dip in torque. car is pretty much stock besides breather mods.
CAI, test pipe, exhaust. any idea?

twohoos

CAI resonance, perfectly normal. With no CAI, the spike would disappear.

mxt_77

The bump at 3700RPMs (and the slight loss from stock below 3000 RPMs) is due to the CAI. There's another bump in torque just above VTEC (~6200RPMs)

My car without CAI vs with CAI:

flyguyvan

what do you have modded in your car? and whats the stock whp/tq?

mxt_77

My stock hp/tq was 201/133. At the time of the dyno above, I had AEM CAIv1, Toda cams SpecAv2, some mild headwork by Marcucci Motorsports, and I think that's it.

The dyno above was actually my best numbers ever. After that, the Toda cams had the lobes shear off, and since then I haven't been able to get back to those numbers (even after installing a new set of Toda cams, adding a Toda header and Amuse R1000 exhaust).

Click the link in my sig for the full story line.