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Old 11-25-2004, 04:09 PM   #1
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Default Mo Boost finally

Finally got the new pulley and CAI installed. CAI is not finished as I'm awaiting a K&N filter yet, but for the time being I'm using the "top notch" Autozone $24.99 special. WOOHOO. REady to get flamed for getting the 2.4 inch pulley, but I they were out of 2.5'* at Pulleyboys, so I went with what I could. So far so good. I get some KR but no more than I used to before the mods, so that'* good I guess. All I can say is 2nd and 3rd gear pick up effortlessly now. 40-100 never came so quick. I'm a happy camper.
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Old 11-25-2004, 04:38 PM   #2
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Watch that kr in hotter weather. It can be a real killer.
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Old 11-25-2004, 07:40 PM   #3
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Maybe I'll just have to go for a 2.4 instead??? 2.4 and 2.5 THAT big of a difference with KR?
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Old 11-25-2004, 10:18 PM   #4
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Yes, it'* that big of a difference. Wait for a stock 92/93 pulley. Killing KR is not an easy task.
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Old 11-25-2004, 10:28 PM   #5
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In order to run a smaller pulley than a 2.5 you should make you're engine breaths better. CIA and full exaust with headers. If you produce a lot of boost you want you're engine breath freely or else it will be strained; and you could, not likely, but could pop a piston.
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Old 11-25-2004, 10:37 PM   #6
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Quote:
Originally Posted by fantastic88
In order to run a smaller pulley than a 2.5 you should make you're engine breaths better. CIA and full exaust with headers. If you produce a lot of boost you want you're engine breath freely or else it will be strained; and you could, not likely, but could pop a piston.


It doesn't have anything to do with headers (which aren't available for the 92-95), but we do have more efficient manifolds. It has to do with spinning the M62 faster than it was designed, and getting into it'* inefficient zone where you're producing more heat than boost.

Pop a piston? I've been running 12 psi for over a year now. And I've yet to see an L67 pop a piston for ANY reason.
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Old 11-25-2004, 10:47 PM   #7
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Heard it on clubgp. Some of those guys are questionable and i'm still new to this supercharger thing so i'll beleive almost anything I read. But when I read it I thought, hmmm... people throw nitrus on these and you're telling me I'd pop a piston running a 3.25" on a series 2? Rriiiight.
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Old 11-26-2004, 11:47 AM   #8
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How much psi does an M62 have stock? 9-10ish? Well that'* at least what it says on my boost gauge.
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Old 11-26-2004, 11:51 AM   #9
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Headers do help reduce knock. equal length headers would be great but they'll have to be custom.
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Old 11-26-2004, 12:18 PM   #10
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Quote:
Originally Posted by beckstyle
How much psi does an M62 have stock? 9-10ish? Well that'* at least what it says on my boost gauge.
GM gauges read one thing, and mean another, trust me . My I/P volt-meter says 14.1-4 volts, and if I read it at the battery, I see 13.1-4. My fuel gauge.. I don't even want to know if that is off, and neither with the oil pressure. My speedo is usually off by a few mph, but that'* okay, and the tach is off by about 200rpm consistantly.


-justin
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