• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

3.25 pulley / 3 in downpipe

gtpinsc

gtpinsc

resident snitch
alot of u kno that ive been in desperate need of something to open up exhaust...i finally got around to installing a 3 in downpipe with hi flow cat...is this enuff for now to stop from screwin my engine up...or should i up a size on the pulley?...i have stock manifold u bend delete the downpipe and flowmaster catback...along with other bolt ons in my signature.
 


best to pulley up if you're currently running the 3.25 as u still have stock manifolds. the front manifold, specifically, is the bottleneck/restriction.
 
i have a stainless powerlog if you are interested. i told you a while back your mods were not enough for your pulley size. do you have rockers or anything else?
 
QwikGT said:
i have a stainless powerlog if you are interested. i told you a while back your mods were not enough for your pulley size. do you have rockers or anything else?
Click to expand...

no i dont have rockers yet...the car had the 3.25 on it when i bought it.I would have had no clue if it wasnt for GPF that wasnt good...how much u want for powerlog?Should i go with a 3.4? I just want my ride to be correct.
 
gtpinsc said:
no i dont have rockers yet...the car had the 3.25 on it when i bought it.I would have had no clue if it wasnt for GPF that wasnt good...how much u want for powerlog?Should i go with a 3.4? I just want my ride to be correct.
Click to expand...

every car is different, i run a 3.4 with rockers, DP, etc...i am adding my N* tb and headers and dropping to a 3.25 this week, i still have to hook up my intercooler. im running a L36 block so i dont need the crazy amounts of boost. gimme 150$ for the log, ill take pics if you want
 
QwikGT said:
every car is different, i run a 3.4 with rockers, DP, etc...i am adding my N* tb and headers and dropping to a 3.25 this week, i still have to hook up my intercooler. im running a L36 block so i dont need the crazy amounts of boost. gimme 150$ for the log, ill take pics if you want
Click to expand...

take some pics when u get time...im not 100% sure when ill b able to get the money together...with powerlog in ur opinion will i b ok with my 3.25? what are your plans for the 3.4 u have?
 


Headers would be a better option, but if you were to go up a pulley size to the 3.4 the powerlog will help, and your front pistons will thank you lol.
 
Even with the powerlog and your current mods you still might not even be able to run a 3.4" pulley let alone a 3.25". Definitely up pulley sizes, that 3.25" is WAY WAY to small. If I were you I'd invest in a scanner so you can determine what size pulley to run.
 
this is my suggestion, pulley up to a 3.4, then get either of the following items or all of them:
-scanner to scan knock plus other nifty stuff
-tuner-HP Tuner, DHP PT, Custom Tuned PCM, DHP PCM, or AFC 2.2
-Front Power Log
 


Thanks for all the input guys...This is my first forced induction car...most of the stuff came on the car when i bought it...I guess ill just b easy on the throttle til i can get all these kinks worked out.
 
you can also unplug the boost bypass valve connector thats near it to limit boost to 4psi if u dont have the 3.4" pulley yet. grant it, it'll be slower than a stock gtp by slightly ^_^;
 
Theres really no way to tell without scanning...the cars are all different and react different to mods. One could run a 3.4 with x amount of mods and be fine while the other one with the same setup will not be ok...It greatly depends on the tune. In other words it helps a lot. But you have to do it the rightway. Not run a smaller pulley than you should and just give it more fuel.


But to answer your queston with the mods in your sig I ould go to a 3.8...wich is stock
 


blowfishRus6 said:
woot woot!! now get a scanner and see where you can go with it
Click to expand...

congrats. you made a good desision. it may seem slower and probably is a little bit but you're doing yourself asnd car a favor. Do it the right way....I almost went about things the wrong way but a cupple people changed my mind.


now like he said get a scanner and a tuner...you may come out better getting a tuner since it includes a scanner. I will personnally walk you through everything if you decide to go that route. And theres a lot of other people on here willing to help also.
 
TDCRacing said:
congrats. you made a good desision. it may seem slower and probably is a little bit but you're doing yourself asnd car a favor. Do it the right way....I almost went about things the wrong way but a cupple people changed my mind.


now like he said get a scanner and a tuner...you may come out better getting a tuner since it includes a scanner. I will personnally walk you through everything if you decide to go that route. And theres a lot of other people on here willing to help also.
Click to expand...

how much am i gonna be looking at to get a decent one? ok to go the used route or buy new one? what brand would be recommended?
 
You must log in or register to reply here.
Back
Top