so if i get a bigger pully untill i can get 60 injectors what size would be safe with hp tuner onits way????

 

well what are you now? completely stock? unless you have the stage 2 (42.5 lb) injectors, you shouldnt change anything regardless of hp tuners.

 

2.6 zzp pully

 

you better get the stock sized pulley back on or buy a pulley that is that size to go back on that hub. and stop making threads asking the same questions

 

i just wanted to see if i can order a 3.0 pully or something other then stock size!! I do have the colder plugs and the tuner. i'm going to order pully this week so thats why i started this one. feed back u know!!

 

i got my stock one for sale..

 

3.0 is safe with stock injectors. as long as u have a tune, my duty cycle is at 91%

 

what size injectors do you have?

 

If you have a stage 2 tune or the zzp s2 tune then you're okay with anything 2.8-3.0. 2.6 has got to be sketchy without 60's.

 

stock injectors
stock pulley...your idc is like 120% @ 6500 rpm

42s
s2 tune 3.0 max
custom tune 2.9 max
custom tune 2.8 max if you limit 6500 rpm

the rest your playing with fire

 

Yup. When I got tuned...GM Stage II with 2.9" I had 116%IDC.

 

ok i put a 3.1 on to be safe what should i do to tune?? yes i have hp tuners!!

 

do you even know how to tune?

 

2.9" with the stage 2 tune 2.6" is not safe short or long term. The smallest you should probably go for is 2.8" but that's pushing it.

2.9" is fine with stage 2 running the injectors that high is counterproductive but if you don't constantly go over 6k you should be fine. Intake temps around 155 driving hard in the summer.

Everything depends on how you drive your car. The two things to watch are intake temps and injector duty cycle.

Honestly running a 2.7" on the stage 2 tune would kick intake temps up at least 15 degrees but I haven't checked...I could check if someone wants me to...but I run richer than stage 2 tune when I run it (maybe 50 miles in 6 months?) so that might skew things.

Um...you have stage 2 correct?

 

why the hell would gm run a car with the duty cycle at 120% from the factory? they wouldn't do that!

I have a custom tune with a 3.0 pulley stock injectors and my duty cycle is 91%

 

idc's can be miscalculated what is your pw. I bet it is over 17ms

 

what did u do to the tune ??

learning!

 

i have a feeling he has no idea.

 

no!!

 

im not gonna lie im no tuner at all I got it tuned with efi live by greenlightmotorsports.com all im saying is why would gm release a car with 120% idc and no i don't know the calculation for it im sure i can find out how, but efi live does it for u.

so whats this calculation for IDC?? ive only ever looked at EFI Live and it calculates it for you...

its not miscalculated efi live calculates it on its own. pw? spell it out im no tuner i don't know the lil phrases....

 

pw=pulse width.

 

it can be

http://www.rceng.com/technical.aspx?...FHoz44mFzZsTzl

say you want 260 crank hp and a max of 80% idc's you need at least 42's.
Most people on stage2 make more hp then that at the crank hence why those idc's will always be over 80.

 

hey thanks for settin me straight... i guess i should do the calculation and not just read what efi live says.... and im gonna see what my pulse width is

 

http://www.stealth316.com/2-calc-idc.htm

another useful site

 

hey thanks man

a guy i work with has efi live v2 scanner and it says it suports our cars but it won't read it for some reason do u know anything about that?