how much boost can i run with my stock 440's?

[98FWDSM]

ok, I have done research and checked different things but i am still not sure of what the best thing is to do. Ok, here goes...I have a 98 Automatic tranny GST, the engine has 104K miles and it has a FP big T28 that has about 10K miles. The mods that I have now are as follows: Greddy Intercooler piping, Greddy Type S BOV, Apexi intake filter, 3" intake pipe, 3" RSR catback exhaust, a straight through cat, new magnecor 8.5mm spark plug wires, new NGK spark plugs, and a manual boost controller. In case it matters, I always use 93 octane. Right now I am running 14 pounds and I have all the supplies to rewire my stock fuel pump..............http://www.roadraceengineering.com/fuelpumptechtip.htm............and I plan on doing this tomorrow but I was wondering what I will be able to turn my boost up to while still running the stock 440 injectors, I have heard 17 but am not totally positive on this number. So, who can tell me what to do????

Thanks
Chris

 

[troysevo16]

yeah 17 is about right with 440cc injectors but you will probably hit fuel cut right around there too. Get some 650 and an afc and you can run much more boost

 

[TRBOTSI]

congrats, you have the first DSM ever with "stock" 440cc injectors

 

[sweet97]

Well they're 450's.That FR big T-28 is suppossed to flow a bit more than the t-25 right? Go for a set of 550's. You should find them used for less than $200. Then I would recommend a GM MAF&Translator from www.fullthrottlespeed.com. Get the MAF at a local yard.
Get a logger. Then up the boost 1 PSI at a time and stay within the safety zone for a 2G. Mark

 

[ryanman]

congrats, you have the first DSM ever with "stock" 440cc injectors

I was gonna post the same thing. :laugh: :laugh:

 

[kpt4321]

Probably around 16 psi, but nobody can tell you for sure. Get a logger on the car and just turn it up until it knocks, easy choice.