Vendor Help! 2.85" pulley!
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From: Illinois
Originally Posted by OniMirage
i would love to think we would be ok and having the injectors go static for only a second isn't going to do too much if any harm to anything specially since the next thing you do right after it goes static is change gears and put them back down to less duty
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From: Philadelphia, Pa
Originally Posted by ludicristSS
They where no more then 78-82% fine they did go 88-92% with the 2.7 over 6600 A/F would get up to 12.4-12.8 by 6800 and power would fall off 50lb injectors would work nice with a 2.7
Originally Posted by ludicristSS
Nope just that run on that car Non of the others did it 3 that day with 42lb 2 with 2.8 and one with 2.7
So technically, they tuned a 42 lb, with a 2.7.
I still think their tunes are too freaking expensive.
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From: OP, KS
Originally Posted by OniMirage
just a question but how would either flow better if they can only send out 42.5lb/min. pressure is one thing but forcing something through a channel that only allows for a certain flow rate is still only going to yield that flow rate. This could be applied to water entering a tube from a larger tank. while the pressure before the tube would be higher than in the tube it can only flow to its maximum regardless of outside pressure until it breaks.
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From: Phx, AZ
Originally Posted by DWK5150
Yes I agree the only time I might be comcerend with that is if you were holding the motor at a constant 7,000 for a long period of time. We also need to remember that every vehicle is different and will resond a little differently as well.
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From: Illinois
Here is a injector flow calculator for those that are curious.
http://www.rceng.com/technical.htm#WORKSHEET
http://www.rceng.com/technical.htm#WORKSHEET
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From: CT
Originally Posted by DWK5150
With the 2.7 though they were at 88-92% duty cycle thats getting high where I prefer not to be.
I think a 2.85" pulley would just be perfect. It would stay a little more snug in that GM stage 2 belt too.
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From: CT
Originally Posted by DWK5150
Here is a injector flow calculator for those that are curious.
http://www.rceng.com/technical.htm#WORKSHEET
http://www.rceng.com/technical.htm#WORKSHEET
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From: Illinois
Originally Posted by CTCOBALTSSS
Yeah 2.7 = Too small for 42's.
I think a 2.85" pulley would just be perfect. It would stay a little more snug in that GM stage 2 belt too.
I think a 2.85" pulley would just be perfect. It would stay a little more snug in that GM stage 2 belt too.
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From: Philadelphia, Pa
People are running 2.7 and upping the rev limit. I am going to keep it at 7000 and shift before then anyway. I want the Smaller puilley for the increase in tq. If I have to I will install a MBC and limit it to 17lbs or so, and still shift early. I have my shift light set at 6450 anyway.
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From: Illinois
ok how about this one this one is good also.
http://www.stealth316.com/2-calc-idc.htm
http://www.stealth316.com/2-calc-idc.htm
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From: CT
Originally Posted by DWK5150
I would say they are figuring a 10% drivetrain loss with that.
GM stage 2 w/2.85" pulley
Header
Downpipe
Cat-back
CAI
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From: Illinois
Originally Posted by CTCOBALTSSS
Oh OK, then it would be about 265-270whp. That would be about these mods.
GM stage 2 w/2.85" pulley
Header
Downpipe
Cat-back
CAI
GM stage 2 w/2.85" pulley
Header
Downpipe
Cat-back
CAI
Thread Starter
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From: CT
Originally Posted by DWK5150
No whp is wheel horse power. Thats what you would be putting to the ground. BHP is engine horsepower basically.
I hope a vendor chimes in. Knowing what we know you would think they would want to make a 2.85" pulley because they would sell very well. Come on vendors.
