i.e. my car is making crank hp.
mods are:
ecu flash mbc 22-20psi
3inch ebay exhaust
stock cat..

 

Go dyno it.....

You might be making 260-270 to the wheels but that's being generous. Every car is different.

 

No way to know or estimate what you're making at the crank, and frankly there is no reason to care. Dyno it to see your WHP - that's the only number that matters, and even that is just a number that means very little without track numbers to back it up.

Btw, you do not have a TBE if you're using the stock cat, so you may want to change that in your sig or whatever...(if you care)

 

take that stinkin cat off, that robs you like a ****. then go dyno it. you should be making decent power.

 

I would expect around 300whp dynojet and 260 MD.
Should be good for low 13's high 12's depending on the driver. I would imagine a trap somewhere in the 112mph.

 

tbe= only turboback with test pipe? how much hp could a stock cat rob of hp?

 

You're all over the place here, Joe. First of all, he's more likely to be around 270whp with the stock cat on an 03. Secondly, he can already run low 13s stock just like any Evo. Thirdly, 300whp would be good for low 12s. Lastly, a trap of 112 is not even close to reality and would mean 330whp on a Dynojet minimum. The more likely guesses are:

- 270whp Dynojet (93oct)
- low 13s with poor driving, but 12.7-12.9 with decent to good driving
- 105-107mph traps

None of these answer his question, though.

 

A stock cat robs 10-15whp.

 

and some spool up.

 

Is your ebay exhaust a full 3"?