Stage 3 pcm and 620cc or 650cc injectors for drivability? - Page 3 - SRT Forums

lVlemphizStylez · 10-28-2008, 10:05 AM

For the record Aaron Neon also gets his from the Fuel Injector Clinic (or at least gets them tested there, that's what the flow chart I got came from)

redsoxsrt · 11-15-2008, 04:06 PM

i have a set of 615's from aaron, on my stage 3 and the car runs perfect. it actually idles smoother than the stage 2 injectors. so just DOOO IIIIITTTTT lol

Novak94 · 11-15-2008, 09:05 PM

Quote: Originally Posted by redsoxsrt

i have a set of 615's from aaron, on my stage 3 and the car runs perfect. it actually idles smoother than the stage 2 injectors. so just DOOO IIIIITTTTT lol

dam i need to pick some of those up...

ade99 · 11-17-2008, 06:10 PM

Quote: Originally Posted by redsoxsrt

i have a set of 615's from aaron, on my stage 3 and the car runs perfect. it actually idles smoother than the stage 2 injectors. so just DOOO IIIIITTTTT lol

I also have these injectors (615ccs) on my Stage3 with FM's 44lb wheel. But when I got my car dynoed, it was running really rich between 3K-5.5K. So rich that it was below the 10AFR line (off the chart) and my car was bogging. This is all Stage3 PCM controlled. My car still made 395whp and 427wtq but I would've wanted to see what it could've made with a more ideal AFR. Would've been nice to hit the 400mark. So tempted to put back the Stage3 injectors just to see how much of a diff. it makes. Or just go with a return line maybe. BTW, this was on race gas and holding 24psi. Other significant mods are TKMS Walbro255, FMIC, AGP WGA, Hardpipes, 3"Dump, 62mm TB and Ported IM.

TomC3 · 11-17-2008, 08:15 PM

ade99...you running the full stage 3 fpr and rail (i.e. 75 psi from the pump), or the standard 58 psi with 255?

ade99 · 11-17-2008, 08:59 PM

Quote: Originally Posted by TomC3

ade99...you running the full stage 3 fpr and rail (i.e. 75 psi from the pump), or the standard 58 psi with 255?

I'm running full unmolested S3 fpr and rail.

srt4geezer · 11-18-2008, 11:19 AM

I've heard that low end bog from several people with the bigger injectors & no SAFC to lean it out.

lVlemphizStylez · 11-18-2008, 11:34 AM

you get the same bog with the SAFC...it happens if you run a static pressure that's too low

nickobsrt4 · 11-18-2008, 02:10 PM

i have aaron's 625 inj ii love how the car feels with them

90VNT · 11-18-2008, 02:26 PM

Can't see how people can use them without pulling fuel so the car isn't rich as hell.

nickobsrt4 · 11-18-2008, 03:17 PM

well i have stg 3 pcm with returnline set at 62 psi static and lft are like 10 and sft are around 6 not to bad annd the pcm is so good it puts the afr in ck at 14.7 15.5 with my setup that runs me to about 11.6 afr in third gear and 10.8 in fourth car drives stock no stumbles like some other inj

90VNT · 11-18-2008, 03:21 PM

Quote: Originally Posted by nickobsrt4

well i have stg 3 pcm with returnline set at 62 psi static and lft are like 10 and sft are around 6 not to bad annd the pcm is so good it puts the afr in ck at 14.7 15.5 with my setup that runs me to about 11.6 afr in third gear and 10.8 in fourth car drives stock no stumbles like some other inj

You are not using the S3 fuel rail. Completely different results.

**Monster** · 11-18-2008, 03:31 PM

Quote: Originally Posted by 90VNT

You are not using the S3 fuel rail. Completely different results.

Why?? I would think you could mock the s3 fuel system with a returnline. A local here ran a returnline with his s3 setup on a 03 rail with a walboro and it ran identical to a s3 fuel setup.

nickobsrt4 · 11-18-2008, 03:31 PM

yep i agree but u wanna trade rails ?lol

90VNT · 11-18-2008, 03:33 PM

Quote: Originally Posted by Monster

Why?? I would think you could mock the s3 fuel system with a returnline. A local here ran a returnline with his s3 setup on a 03 rail with a walboro and it ran identical to a s3 fuel setup.

S3 rail has its own regulator, it doesn't provide a constant fuel pressure. Pressure varies with boost.