Will my fuel setup work with 1000cc injectors?

BIGBLAZE79 · 10-05-2008, 10:13 PM

I recently installed my PTE4431R and my 660cc injectors are definatly not big enough. I'm showing 93% duty cycle on DSMLink. Thats at only 18Psi. I can't floor it cause the minimum boost with the controller turned off is 20Psi. If I get 1000cc injectors will I be ok with my walbro 190 w/rewire and stock FPR or do I have to purchase a 225 and after market FPR?

Backinajiffy12 · 10-05-2008, 10:15 PM

I would upgrade to the 225

JayRolla · 10-05-2008, 11:10 PM

I would buy both to be safe, you dont want to run lean and cause a chance to damage something. I would also get a AFPR, I dont run one but the 2g's have more issues with over run.

95GSXracer · 10-06-2008, 04:13 AM

Looking up that turbo quickly on PTE's site it looks like it's about 55 lbs/min. The 190 is too small for this turbo, the 255lp is borderline, and the 255hp will support it with enough headroom to be comfortable with it.

The 660s are too small as well. 750s are the minimum you can run, but those will see 100% IDCs if you max the turbo out, so you might as well go bigger. With DSMlink there is no compelling reason to run anything smaller than the ~1000cc-ish injector of your preference.

2G's do have a bigger issue with return line over-run, anything 255lp and up will over run it (whether or not you notice it or care about it). The simple upgrade is to run a 3/8th inch hose barb on the regulator's output, to a short piece of 3/8ths fuel line, to a length of 3/8th brake line (~5 foot lengths available at autoparts stores for ~4 bucks), to another short piece of 3/8th rubber hose to the tank fitting (either clamp it down hard (it's low pressure) or build a fancy adapter that drops it to the stock size of 1/4 inch that won't restrict flow).