In case anybody was wondering whether it was possible or what the upper limit on injector control for the stock PCM is... I am now running 1000cc injectors... the cold startup is a bit rougher than I want (I need to tweak the injector constant a bit more) but the warm AFR and warm low rpm/low tps cruise is at a very solid 14.5 - 14.9:1....
They are set to idle at 28 psi of fuel pressure for reasons that have nothing to do with HPTUNERS. Low RPM's and mild throttle they are very responsive and at 19 psi @ around 5500 rpm in 4th with mild tuning are barely over 40% duty cycle... plenty injector left for the amount of power I want to make.
So - as a headsup - yup it's do-able. I know I couldn't get an answer because nobody had tried it yet, not even Chris @ HPTUNERS had an answer for me... haha.
Good luck, all.
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
thats awesome to hear man. I run my 650cc at stock fuel pressure, they run fine. If you run them around the 19psi mark, around 43 psi the 1000cc, would actually be around the 450-475 mark. Thats frick'n awesome to hear
HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED
Another first for Sweetness!
good work Chris.
-asia
Blew it up, build numbers coming soon
Awesome.
I cant wait to see this thing in action!
What is your injector constant?
wow congrats man... I know i'm going to be tuning in my 720's on my setup come spring and I will absolutely be looking for some of you help and insight. With so few people running big injectors, and big hp numbers on the jbody it's nice to hear you're having good luck with it and being ground breaking
"Horsepower is the Ultimate Accessory"
nice to see chris maybe put my 1000cc in instead buying 650's
R.I.P. Brian Klocke, you will never be forgotten
Boosted2point4 wrote:nice to see chris maybe put my 1000cc in instead buying 650's
ouch, that is a total burn on me... BITCH!!! JK, lol
HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED
LOL, nah i have 1000's i bought for the motec m4, but thought they would be too big for the hpt, proably still will go with the 650s thoo
R.I.P. Brian Klocke, you will never be forgotten
I want to see this car eat someone CHRIS !!! (you know who lol !)
My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
theres nobody on this entire site vendors included that would even come close to maxing out 650s, totally a waste of money
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
hmmm. I run mine around 75%... and Iam not running over 260-270whp.. hope you can justfy what you are saying...
HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED
Whoever said I wanted to max out a set of injectors? I didn't - that's an asinine thing to do.
I calculated my desired power, maximum fuel pressure, maximum duty cycle, and then picked an injector from there that would be SAFE to do the job I require them to do.
if I wanted to max out an injector I would have kept the brown tops in there.
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
ge_forcez22 wrote:hmmm. I run mine around 75%... and Iam not running over 260-270whp.. hope you can justfy what you are saying...
Wow dude.. my duty cycle is like 42% at 12 psi of boost lol... on 650's..... I think before that at 9 psi it was 27%
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