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01-02-2011
so i am gunna try and get an intercooler from ZZP when i get my tax return my main question is i was cosidering getting a pully as well how small of a pully can i put on with just an intercooler on my car. other than a cold air intake i havent done anything to my 98 grand prix GTP. i have herd mixed things on this such as i can go as small as 3.0 with just the intercooler installed.
01-02-2011
With just a intake? You need ATLEAST a down pipe 3.3 IMO. With headers- 3.0/2.9
This is assuming its a s2 IC
Other things you really should do other then The intercooler is ported LIM and blower, 104 autolite spark plugs,and headers.
Last edited by 01gpgt01; 01-02-2011 at 10:39 AM.
http://www.streetfire.net/video/2001...ynp_208097.htm
01-02-2011
if you do go down a size, only go to a 3.4... The intercooler is a great investment, I have the S2 from zzp and love it (dont get the short stack its a waste of money). But with just an IC, its really not gonna do a whole lot for your car until you get some flow mods (exhaust, cam, rockers, etc...) so I wouldn go that small in pulley size...
and another thing you should get is a scan gauge now in case your IC pump fails so you can see the KR....
01-02-2011
so would you all recomend getting the flow mods or basicly what i can with the money instead of getting the IC right now? this is all assuming i do get enouigh money from my return lol
01-02-2011
As long as it is tuned right...who the hell needz flow mods.
Buddy of mine is running a 3.2" knock free on his '97 with just a short stack...and all he has for supporting mods is a open cone and a catless 3" DP...everything else on that car is BONE STOCK. Just keep in mind GM had a intercooler on the concept GPX back in '96 and it ran down the F-Body with ease at the time...factory pulley was a 3.0" or 3.1"... http://image.motortrend.com/f/161598...GPX+engine.jpg
Note the braided lines above the belt for the IC lines...
If I were you...I'd get the stage 2 intercooler and headers...you'd be set. Also...is it a 97-03 or '04+? Because that'll make a huge difference on the pulley you'll be running. Anything lower than a 3.2" on a 97-03 car you're going to be needing injectors...intercooler and headers on a '04+ car is a 3.4"...done.
01-02-2011
KR just tells half the story. Whats his afr whats his timing. Just saying no Kr is very misleading. If you have zero KR and a afr of 10.2 and 13 degrees WOT timing...Then running that pulley size isnt what you want. You want to run the pulley that you can run 11.6-11.8 afr with Atleast 17 degrees timing with little to no KR. Intercooled. Non intercooled id shoot for 11.3-11.5Originally Posted by bluegtp91
But Each car is different. And your gonna have to scan and see where your at
Last edited by 01gpgt01; 01-02-2011 at 01:02 PM.
http://www.streetfire.net/video/2001...ynp_208097.htm
01-02-2011
Why didnt GM go ahead with the stock intercooled l67 idea? That probably would have solved the whole knock issue.
01-02-2011
I was refering to just having the IC with the stock tune... of course with a tune you can get a little more out of it...
oh and stock injectors are good till a 3.1
01-02-2011
I hope you're not talking about Christian....
01-03-2011
Hope your jokin...furealzoh and stock injectors are good till a 3.1
I am...only because I've seen the scans...not saying the car is fast by any means...trust me.
01-03-2011
I don't doubt he is knock free, but I gotta say for an ic'd car I stuck it to him hard with my old 3.4.
01-03-2011
I've theorized that a Gen V is as good or better (temp wise) than an SS IC. Costwise, it's something to mention if money is an issue.
01-03-2011
mines doin just fine...
Last edited by blueguy; 01-04-2011 at 03:14 PM.
01-04-2011
Dude, on our write up it says this:
"Also keep in mind that if you do happen to get away with dropping lower than a 3.1”/3.0” pulley, your stock fuel injectors will probably run static (out of fuel) and you’ll need bigger injectors."
By that I also understand that the stock injectors are good enough until a 3.1 pulley.
01-02-2011
Money.
01-02-2011
I was hitting 105 percent injector duty cycle on a 3.4 pully with high compression lol. Id imagine a 3.1 on a gtp would be well into the 100's as well
http://www.streetfire.net/video/2001...ynp_208097.htm
01-04-2011
Depends on your IDC.
It should be 80% or lower.
01-04-2011
Right Juan...lower than a 3.2" you will start to run static...then again, every car is different. That thread is just a basic guideline...and it needs to be re-done...but it still gives the simple way to mod these cars effectively with the knowledge you need.
01-04-2011
When every car usually has 100k+ miles on a stock fuel pump and the setups are different, it depends on the tune and your particular car. Injectors can only do so much to keep up. Pulley size is most of the time irrelevant.
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