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Old 09-24-2005, 01:08 PM   #1
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Default 3.25 pulley reliability question?

hi,

im planning like probably many know now install my 3.25 next spring, with supporting mods,

yesterday i hear someone at the drag (he got a GTP) telling me that getting down to 3.25 is risky for blowing a gasket.

is it right? and if yes, what can i do to prevent that?
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Old 09-24-2005, 01:38 PM   #2
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definitely do the 1.90:1 rockers and the pcm. you should also consider a set of PEMs or headers.
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Old 09-24-2005, 01:48 PM   #3
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with the mods that you currently have a 3.25 would give you massive KR
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Old 09-24-2005, 06:18 PM   #4
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Default Re: 3.25 pulley reliability question?

Quote:
Originally Posted by mike_peperni
hi,

im planning like probably many know now install my 3.25 next spring, with supporting mods,

yesterday i hear someone at the drag (he got a GTP) telling me that getting down to 3.25 is risky for blowing a gasket.

is it right? and if yes, what can i do to prevent that?
i repeat... i heard that putting a 3.25 pulley can blow gasket, is it right?


for advice ,greatly appreciated, but i already know that for supporting mods
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Old 09-24-2005, 06:33 PM   #5
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Cars ares running smaller pulleys than that with out a problem with stock gaskets but you need suporting mods to take care of the KR you would get.
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Old 09-24-2005, 11:18 PM   #6
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FYI, I was running 11psi of boost before the LIM porting, and never did a thing to a gasket. If you flow correctly (freely), there'* no risk.
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Old 09-24-2005, 11:48 PM   #7
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Quote:
Originally Posted by willwren
FYI, I was running 11psi of boost before the LIM porting, and never did a thing to a gasket. If you flow correctly (freely), there'* no risk.
ok, nice to hear
im now 100% sure of my future mods!

willwren
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Old 09-30-2005, 01:14 AM   #8
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A 3.25" pulley is not going to cause you to blow a head gasket. We run a 2.55" pulley on the GTP daily and the heads have never even been off of it. It has the original head gaskets and it has had over 15psi boost for more than 15k miles, and it has had 11psi+ for its entire life 33k+ except the first 300 miles. With the stock cam we hit 17psi or more on some occasions and it caused no problems. If that doesn't convince you, I'm not sure what will...

Shawn
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Old 10-03-2005, 08:39 PM   #9
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Quote:
Originally Posted by dbtk2
A 3.25" pulley is not going to cause you to blow a head gasket. We run a 2.55" pulley on the GTP daily and the heads have never even been off of it. It has the original head gaskets and it has had over 15psi boost for more than 15k miles, and it has had 11psi+ for its entire life 33k+ except the first 300 miles. With the stock cam we hit 17psi or more on some occasions and it caused no problems. If that doesn't convince you, I'm not sure what will...

Shawn
no more doubt about it!
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