2.55-.35=17.... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-09-2006, 09:43 PM   #1
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Default 2.55-.35=17....

Degrees of KR :(

I finnally put the pullie on the car, i did notice a improvment in the butt dyno, but i think all the KR im getting is keeping me way back, so my question is, Do you think i should take it back off and do more mods to support it OR keep it on there for a little while and see if the PCM can lear a little and reduce the amount of KR im getting OR should i take it out and get off my *** and order a JET chip

The only mods that i think i might need to support a 2.2 pullie is to get my EM welded up and ported and to put a better air filter one with a heat sheild



Any thoughts?
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(ignor the oil pressure it needs a new sender)
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Old 09-09-2006, 09:48 PM   #2
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i dont know how u felt a butt dyno difference with 17*KR

id leave it on for a while and see if any learning happens
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Old 09-09-2006, 09:51 PM   #3
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Quote:
Originally Posted by harofreak00
i dont know how u felt a butt dyno difference with 17*KR

id leave it on for a while and see if any learning happens
your right, i took the car out twice after putting it on, the first time i felt the improvemnt the most and got only 9*kr then i got the 17 the second time and the improvment was very minor :(
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Old 09-10-2006, 09:30 PM   #4
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no one else have anythoughts as to what i should do?
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Old 09-11-2006, 12:54 AM   #5
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Yeah...its not happy with that pulley..
I dont know if anything is avail for a 92 in the form of a chip?
Something isnt right though..theres a reason why you are pulling all that KR, and id take guess at exhaust mani leaks..seems every Series one is now suffering this
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Old 09-11-2006, 01:49 AM   #6
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Or fuel pressure.

Get that pulley off of there until you find the issue.
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Old 09-11-2006, 01:59 AM   #7
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I pull 20* of KR with the stock pulley.

thats with a high flow cat, PEMs, CAI, 50PSI of fuel, kg fuel injectors and RX4750 and 50 degrees ambient temp lol.
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Old 09-11-2006, 02:23 AM   #8
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Quote:
Originally Posted by willwren
Or fuel pressure.

Get that pulley off of there until you find the issue.
I dont think it would be fuel pressure, everything but the injectors is new

I would deffinitly fall for the mannys being the issue on this one though, because i have always felt them to look a little bad IMO
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Old 09-11-2006, 08:36 AM   #9
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Peter..you mention EM cracks. Get them fixed up. The knock sensors can hear those exhaust leaks.

Hans.. I'm starting to wonder if your PCM isn't cruising up the wonky trail at 90mph. Have you tried another PCM to see if that'* your issue?
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Old 09-11-2006, 10:46 AM   #10
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Only one knock sensor. And it'* not the noise of the cracks that'* an issue. The leaks cool the manifolds down, making them flow less efficiently. As a result the exhaust backs up in the manifolds, heating up the cylinders.

Regardless of new or not with the fuel system components, check your fuel pressure.
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