Vortech Pulley Question
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TECH Enthusiast
Joined: Dec 2001
Posts: 553
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From: Columbia, MD
Vortech Pulley Question I'm a few weeks away from ordering my supercharger. It is my understanding that with a Heads & Cam car like mine, the 3.125" pulley that comes with the Vortech V-9 G-trim kit will NOT produce the advertised 9lbs. of boost. That said, which pulley can I use to get the boost back up to 9lbs. (or close to it). I don't want to overspin the impeller unit, if I can help it.
Here are the other three 8-rib pulleys I found on Vortech's website:
P/N 2A038-275 Supercharger Pulley, 2.75", 8-Rib
P/N 2A038-285 Renegade Supercharger Pulley, 2.85", 8-Rib Improved Traction Profile
P/N 2A038-295 Supercharger Pulley, 2.95", 8-Rib
Does anybody know which of these would be equal to roughly 9 lbs. on a H/C car?
Thanx.
Here are the other three 8-rib pulleys I found on Vortech's website:
P/N 2A038-275 Supercharger Pulley, 2.75", 8-Rib
P/N 2A038-285 Renegade Supercharger Pulley, 2.85", 8-Rib Improved Traction Profile
P/N 2A038-295 Supercharger Pulley, 2.95", 8-Rib
Does anybody know which of these would be equal to roughly 9 lbs. on a H/C car?
Thanx.
Thread Starter
TECH Enthusiast
Joined: Dec 2001
Posts: 553
Likes: 0
From: Columbia, MD
Re: Vortech Pulley Question </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by superchargedZ:
<strong>My guess would be a 2.65 or 2.5 pulley. Right now I am running a 2.65 pulley.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">According to Vortech's V9 impeller speed calculator:
Crank Diameter: 8"
Engine RPM: 6600
Supercharger Pulley: 2.65"
Impeller Speed: 68739 (ooops!)
Now, if I go up to 2.85", the Impeller Speed drops to 63915.79, which leaves a little room.
Rethinking my original question, it seems to be now a matter of what pulley gets me closest but not OVER the maximum 65,000RPM impeller speed, rather that what boost I can run with a particular pulley.
Yes, i want to rev to 6600.
Yes, I read all of yours and 30thta436's posts about overspinning the impeller.
No, I don't have the ***** overspin mine. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
So 2.85 it is.
Thanx.
<strong>My guess would be a 2.65 or 2.5 pulley. Right now I am running a 2.65 pulley.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">According to Vortech's V9 impeller speed calculator:
Crank Diameter: 8"
Engine RPM: 6600
Supercharger Pulley: 2.65"
Impeller Speed: 68739 (ooops!)
Now, if I go up to 2.85", the Impeller Speed drops to 63915.79, which leaves a little room.
Rethinking my original question, it seems to be now a matter of what pulley gets me closest but not OVER the maximum 65,000RPM impeller speed, rather that what boost I can run with a particular pulley.
Yes, i want to rev to 6600.
Yes, I read all of yours and 30thta436's posts about overspinning the impeller.
No, I don't have the ***** overspin mine. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
So 2.85 it is.
Thanx.
