Originally Posted by pinoyFMtC

I'm pretty sure you're right, oil-squirters, slight raise in compression and a more equal-length exhaust manifold. They changed the way they measure SAE crank horsepower around 2005 or 2006 I think? This may be why the '07+ have a slight bump in power, but they are rated the same at the crank. Could be wrong though.

Originally Posted by rhythmnsmoke

It's not biggie, I mean it's only a slight street tune for WOT. Also, I changed the way the car transitions into WOT (closed loop into open loop). If you stuck a wideband on a stock tC, you can watch the A/F ratio go from 14.7 (normal), and then it goes lean to about 15's/16's and then starts to drop down to 12's and eventually 11's when you get into the 5k+rpms. This is super slow compared to what I did to the tune. I made it to where the car wouldn't dip down into the 15's/16's before making it's way back to 12's/11's. Instead, now it's more like 14.7 - 15.0.....13.5....12.9. I kid you not it's like the car hits Lift/Vtec the way that it's tuned now. It's like whaaammmm...WHAAAAMMMM and not...wwwwwwwwwwwwwwwwwwAAAAMMM. The stock tune is more low reaching down low and gradual build up, vs what I've done to it now.

To put into perspective. I guaged this via real world means as well, by having my boy Slikk race me in his 08 tC. His 08 has a Injen CAI, and I just have a full exhaust (stock header, stock airbox), since buying those things would be worthless because I'm going back on boost soon.

We raced and he would pull about a half a car to car on me before the EU tweak. Granted I have drag holding me back since I have an APR front splitter and APR GT200 wing. So, I went home, flattened the wing out some, and then I began to tweak the EU. We re-raced on another day with the tweak to the EU. I pulled like 3 cars on him with both of us starting in 3rd gear at like 40mph.

The other benefit to this is that the EU has the ability to increase your redline. The 05-06 tC redlines at 6250rpms and the 07+ redline at 6500rpms (this is another reason why you might find a slight increase in HP on the 07+, they simply have more compression and a tweaked tune to go with that bump in rpms). Since my tC is an 06, I changed the redline to that of the 07+ (6500rpms). Great benefit for 05-06 guys to be able to shift at the same time as the 07+ guys.


FYI...tC can effectively rev to 7k rpms without work to the head. On a completely stock motor, I would not put no more than 6800rpms to it (to high for NA but good for turbo), and if you have a built bottom end and turbo but with stock head, It would be fine to take it to 7k.

Originally Posted by myr6goesfast

I don't know why you N/A guys don't listen to this man. The reason why I got my ultimate is because his input and knowledge.

Originally Posted by ESEMRFOZZ13

+2 for rythm. i preffer nobody listen to rythm though, this way i keep pounding my fellow tc's on the track. it does feel like my civics vtech but with torque added. 1 thing i do dissagree with, is the compression it's 9.8.

Originally Posted by Nakioki

should've gotten faster car?

Originally Posted by Nakioki

should've gotten faster car?

Originally Posted by rangerryda

You are correct in all three categories.

Originally Posted by divisii

nitrous is the most low cost per power output
next would be turbo

It'd be a waste of cash and effort on IHE if you are saving for a turbo;
The only thing worth your trouble is exhaust, and even that won't be really worth ish until the turbo is in.
R