3.4 verses 3.5 pulley size - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 05-16-2006, 04:09 PM   #21
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Yeah...I now have PEM'*..however when I pullied I only had a gutted air box. I took many scans before and after the PEM'*.

Note: 3.4" installed in the beginning of Novemeber and I live it CT...so 50-70 degree days.

Before PEMs:
3.4 pulley would get me 2*-4* KR in warmish weather. no kr at all in weather below 30 degrees.

After fixing up my gutted airbox to pull better air from behind the headlight.... I didn't check for KR..but it felt a little better.

Putting the PEM'* on.. KR is inconsistent and non existant under 60 degrees. I saw no change adding a high flow cat.
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Old 05-16-2006, 06:44 PM   #22
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Mind you it is still a little cool out but I think for us with small mods 3.5 is perfect and you will notice a huge difference.I have FWI , 180 , 104 autolite and a standard intense PCM never see KR.Although I have a 3.4 I am not even going to bother for now.Happy with HP for now.
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Old 05-17-2006, 12:29 PM   #23
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umm stupid question but what is a PEM? im just bout ready to order the 3.5 inch pully and i just wanna be sure so i dont like blow my car up
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Old 05-17-2006, 12:52 PM   #24
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Quote:
Originally Posted by dynomite4224
umm stupid question but what is a PEM? im just bout ready to order the 3.5 inch pully and i just wanna be sure so i dont like blow my car up
Ported Exhaust Manifold, basically makes the exhaust free flowing where the restrictions are....

you wont blow up the car with the 3.5, you will be fine with a CAI/FWi or a Gutted airbox, and a 180 thermo
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Old 05-17-2006, 12:56 PM   #25
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haha ok thats good to hear alright so i finaly found a 3.5 pully on zz performance and now my last question is were can i find a gatorback belt that will fit the i found a few that would fit the 3.4 or could i use the stock one....i wasent to sure if it be to long....
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Old 05-17-2006, 12:57 PM   #26
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so what is the likley power increse im lookin at itll deff be noticable right...i just want a little more get up n go power
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Old 05-17-2006, 01:01 PM   #27
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wait i answered my own question.....a 98 bonneville is the w body right i found one on the intense racing site
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Old 05-17-2006, 01:37 PM   #28
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That would be the 715 belt. Trust me,I know
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Old 05-17-2006, 01:41 PM   #29
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Quote:
Originally Posted by dbeast420
That would be the 715 belt. Trust me,I know
Thanks for the giggle Cap'n Belt Slip.

I'm with Scott (aka Dbeast) on that... 715 is the magic number.
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Old 05-17-2006, 02:16 PM   #30
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Quote:
Originally Posted by dynomite4224
wait i answered my own question.....a 98 bonneville is the w body right i found one on the intense racing site
No, a Grand Prix is a W body.
A Bonneville is an H body.
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