i've had the kit on for about 3months or 3000miles, its all stock, just has the vortech. i was going to keep it like that cause i daily drive the car(i also have the ings half kit and 19" sf challange, was going just for looks) but now the car doesn't feel fast anymore. i want alot more power, something that will get that fast feeling back, so my question is what parts should i get (i have the r4 program already, just haven't had time to take it get tune)
some parts i have been thinking about are the fujitsubo y pipe and exhaust or should i go with the nismo full exhaust (or what exhaust makes the most power). should i go with high flow cats or test pipes, does the test pipes give you a check engine light? and my last big question should i get a plenum? what plenum is the best, will it crack and does it help make alot of power?
what do you guys think my car is making right now and what else do i need to get to 400 or more rwhp (without cams)?
thanks for reading the long *** post and thanks for any info!!

 

Best bang for buck would be a smaller pulley.

 

Plenum, hi-flow cats and exhaust.

 

totally different car with the 3.12 pulley

 

That is the pulley that everyone refers to as the "9 lb pulley", correct?

 

I gained 30whp when my tuner use the R4, also u may need to get a new belt to get some boost back, but yes a smaller pulley would be the way to go. Tig488, what size belt is needed for the 3.12 pulley, and what were your gains by switching to that pulley, assuming you have that one?

 

I agree..

1. Replace all belts - slippage will kill hp.
2. Get the 9lb pulley
3. Get the car tuned

 

A 93 inch belt will work for the 3.12 and 2.87 pulley's . Get the Gates belt....thicker , stronger, stretches less . And yes...Best thing to do is get the car tuned

 

exactly as boog said. yes i do have the 3.12 (9lb)

 

So is the 3.12 pully less safe? How much gain do you get from adding this?

 

Your probably in the 300whp range now , tuning will get you 320 to 340 , the 312 pulley will get you 360 to 390whp . This all depends on your tuner and the dyno you use while tuning ,If your tuner doesnt have a knock sensor to use while tuning ,dont take out less than 7 degrees of timing out at 8lb's of boost and above . I tried and broke a piston . All the number depend on what kind of Dyno you are on also . I used a loaded Mustang Dyno...set for a 3,700lb car and got 351whp, a dyno jet would show me at around 390whp {well not any more...its broke for now }

 

Best pully kit to buy and where?

 

holy ancient thread, batman!!

 

No Chit...old