2.85 installed!!

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Sep 17, 2007 | 07:30 PM

#51

06SS/SC STAGE2

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Joined: 08-22-07

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From: Melbourne, FL

Quote:

Originally Posted by Edubs

@ Area...^^^

Now, for you, I wouldn't just slap on a 2.85" pulley and call it a day. Are you having it custom tuned for your setup and location? If not, I wouldn't recommend it. The 42lbs/hr injectors should be good enough for 300 whp since our system flows more psi than that (62ish?). But the only reason I'm risking it is that I had it professionally tuned by someone who knows what they're doing. If you don't hook your **** up to HPT w/ an AFR gauge and log the hell out of it, how the hell will you know what it's doing with that modification? Intakes and exhaust are one thing, but if you're increasing airflow on that level, you should take the appropriate steps to adjust your PCM calibration for it...

I agree with you about watching afr's and ltft as well as idc's. I have done enough loging/tuning on my friends vetts and gto's to know what is safe and what isnt. I like others out there are kind of wondering will -0.50 of an inch gonna make that much of a differance if one is already running a 2.9 on a stage 2. Im all for being safe, but just a little curious if one can get away with a 2.85 set up and also not be beating the **** out of there car. I like to drive it hard from time to time but only in short bursts, for the most part I drive it easy. Cant afford a ticket and seems to be to much traffic when Im out.

Sep 17, 2007 | 07:33 PM

#52

Matty

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Joined: 01-27-06

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From: eh

Quote:

Originally Posted by Onyxd04Redline

42lb injectors + 2.85" pulley = BOOM

Do a search

I can't recall anyone blowing up their goodies with a 2.85/ 42.5# combo...maybe you know the name(s) off hand.

Sep 17, 2007 | 07:36 PM

#53

IonNinja

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Joined: 07-29-05

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From: AZ

has anyone tried speaking to GM themselves about why they chose 42.5# injectors and maybe how they determine injector size with their setups?

Sep 17, 2007 | 07:44 PM

#54

Area47

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Joined: 03-22-07

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From: Still fixing others mistakes.

Quote:

Originally Posted by IonNinja

has anyone tried speaking to GM themselves about why they chose 42.5# injectors and maybe how they determine injector size with their setups?

i believe you would have better results getting to see a donkey show in a retirement home.

Sep 18, 2007 | 08:05 AM

#55

Edubs

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From: West Coast, FL

Sep 18, 2007 | 10:26 AM

#56

lsjwannabe

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From: on here

Quote:

Originally Posted by SSalexSS

....everyone knows the safest would be to run a 2.5 pulley with sotck injecotrs and stock belt duh

i run my 2.5" pulley on a stock belt....

Sep 18, 2007 | 10:31 AM

#57

distillion

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Joined: 05-11-05

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From: mississauga

i run my 2.7 on gms stage 2 belt.
its even tighter now thanks to the meth plate

Sep 18, 2007 | 10:35 AM

#58

lsjwannabe

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From: on here

i want meth not fair

Sep 19, 2007 | 02:28 PM

#59

Dayn

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Joined: 06-07-06

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From: Winnipeg

https://www.cobaltss.net/forums/show...official+blown

if you want to read a deposit of info from people who have blownt heir engine and what they were running.

Sep 19, 2007 | 02:37 PM

#60

Area47

Rent me! per hour

Joined: 03-22-07

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From: Still fixing others mistakes.

Quote:

Originally Posted by lsjwannabe

i want meth not fair

im sure you can find someone in your town to cook up a batch for ya

Sep 19, 2007 | 02:44 PM

#61

Edubs

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Joined: 05-01-06

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From: West Coast, FL

Yeah, they're all self-tuned when someone doesn't know what they're doing or canned tunes that aren't the best or people are throwing extra mods in when the canned tune doesn't account for it...