When do u know u need a larger SC?
When do u know u need a larger SC? Do my friend need a larger SC if he is running a 2.75 pulley and only getting 11psi on a 8.6C/R motor? He was running 9psi with a 2.95 pulley and when we got a 2.75 pulley we were expecting a 13-14psi not a 11psi!!! He has a V-2 vortech SC and the specs on this SC are:
It flows 1000CFM
Maximum boost pressure: 20 PSI *
Maximum impeller speed: 50,000 RPM
I was thinking he will be needing a larger SC to get more boost and power from it since the V-2 isnt enough for his engine IMO. What do u think guys?
It flows 1000CFM
Maximum boost pressure: 20 PSI *
Maximum impeller speed: 50,000 RPM
I was thinking he will be needing a larger SC to get more boost and power from it since the V-2 isnt enough for his engine IMO. What do u think guys?
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Joined: Nov 2001
Posts: 3,048
Likes: 12
From: Raleigh, NC
Re: When do u know u need a larger SC? The boost increase from your pulley swap sounds about right to me. If he can spin the supercharger more without detonation, I think he needs a bigger crank pulley.
Getting smaller than 3" on the supercharger pulley begins to introduce more slippage, which, of course, reduces potential boost level.
my2cents
Good luck!
Getting smaller than 3" on the supercharger pulley begins to introduce more slippage, which, of course, reduces potential boost level.
my2cents
Good luck!
Re: When do u know u need a larger SC? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Black LS1 T/A:
<strong> The boost increase from your pulley swap sounds about right to me. If he can spin the supercharger more without detonation, I think he needs a bigger crank pulley.
Getting smaller than 3" on the supercharger pulley begins to introduce more slippage, which, of course, reduces potential boost level.
my2cents
Good luck! </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Detonation is not a problem here. So its ok to see a 2psi gain with .20 less in the pulley size as happend with us(from 2.95 to 2.75 just 2 psi gain)? How large should he go with the crank pulley to increase another 2 psi?
So would a larger SC help to give the same level of boost with larger pulley? For example, the small V-2 gave 11psi with a 2.75pulley, would a larger SC gives 11psi with a 3.15 pulley to minimize slippage?
<strong> The boost increase from your pulley swap sounds about right to me. If he can spin the supercharger more without detonation, I think he needs a bigger crank pulley.
Getting smaller than 3" on the supercharger pulley begins to introduce more slippage, which, of course, reduces potential boost level.
my2cents
Good luck! </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Detonation is not a problem here. So its ok to see a 2psi gain with .20 less in the pulley size as happend with us(from 2.95 to 2.75 just 2 psi gain)? How large should he go with the crank pulley to increase another 2 psi?
So would a larger SC help to give the same level of boost with larger pulley? For example, the small V-2 gave 11psi with a 2.75pulley, would a larger SC gives 11psi with a 3.15 pulley to minimize slippage?
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Joined: Apr 2002
Posts: 1,755
Likes: 2
From: Cincinnati, Ohio
Re: When do u know u need a larger SC? I spoke with RMCR (about getting an S or T trim) and he said that the belt slippage problem is really an ATI thing. He said the Vortechs don't have this problem due to the better tensioner design. A t-trim is 1250 CFM max 55000 rpm and bolts up the same.
Re: When do u know u need a larger SC? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 2001WS6Vert:
<strong> I spoke with RMCR (about getting an S or T trim) and he said that the belt slippage problem is really an ATI thing. He said the Vortechs don't have this problem due to the better tensioner design. A t-trim is 1250 CFM max 55000 rpm and bolts up the same. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well the Vortech does slip on both of my friends cars. On of them are using a 2.95 pulley and the other one is using a 2.75 pulley. We have found a way to make the belt very tight without slipping... Take the tensioner pulley out and drill a hole at 12 O'clock position(the hole is drilled at 1 O'clock position now) and then put it back on and tighten the bolt well at the 1 O'clock. It will be much tighter on the belt after that and wont slip.
<strong> I spoke with RMCR (about getting an S or T trim) and he said that the belt slippage problem is really an ATI thing. He said the Vortechs don't have this problem due to the better tensioner design. A t-trim is 1250 CFM max 55000 rpm and bolts up the same. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well the Vortech does slip on both of my friends cars. On of them are using a 2.95 pulley and the other one is using a 2.75 pulley. We have found a way to make the belt very tight without slipping... Take the tensioner pulley out and drill a hole at 12 O'clock position(the hole is drilled at 1 O'clock position now) and then put it back on and tighten the bolt well at the 1 O'clock. It will be much tighter on the belt after that and wont slip.
