lumbeepride Posted June 24, 2012 Report Share Posted June 24, 2012 Need more boost, had a 3.5 inch pulley, what size should I get and where can I get it?? Will a cobra pulley work? Quote Link to comment Share on other sites More sharing options...
Link2603 Posted July 12, 2012 Report Share Posted July 12, 2012 I have a 2 5/8 pulley. How much boost do u have now? Quote Link to comment Share on other sites More sharing options...
lumbeepride Posted August 2, 2012 Author Report Share Posted August 2, 2012 Dude I'm maxin out at 5 psi Quote Link to comment Share on other sites More sharing options...
MID12sSSS Posted August 3, 2012 Report Share Posted August 3, 2012 TVS! Quote Link to comment Share on other sites More sharing options...
Link2603 Posted August 9, 2012 Report Share Posted August 9, 2012 Well a 2 5/8 pulley would give you in theory 7 pounds more( that's saying you get 1 pound for every 1/8" smaller) but from my experience it will only give you 4-5 pounds more on the whipple. I went from 3 3/8" to 2 5/8 and it went up 4 pounds. 2 pounds to 6 pounds and now with a custom 2 1/8 8 rib pulley I see 10 pounds of boost. Quote Link to comment Share on other sites More sharing options...
Blazerdave2000 Posted March 7, 2013 Report Share Posted March 7, 2013 Any reason why I would be seeing 10 pounds of boost on the stock 4.25 pulley? I was told the stock pulley should only be about 5 to 7? Any thoughts? Quote Link to comment Share on other sites More sharing options...
Link2603 Posted March 8, 2013 Report Share Posted March 8, 2013 Where is your boost gauge hooked up at? Intercooler? Is this a older sidemount or a top drive whipple Quote Link to comment Share on other sites More sharing options...
Blazerdave2000 Posted March 8, 2013 Report Share Posted March 8, 2013 It's a side mount whipple. And my guage Is hooked to the 90 that connects from the discharge of the whipple to the manifold. I checked today with a diff guage and it says the same thing. 10 pounds of boost. So that eliminates my thought on a bad boost guage. Quote Link to comment Share on other sites More sharing options...
Link2603 Posted March 8, 2013 Report Share Posted March 8, 2013 Stock cam? Any other mods? What size is the pulley exactly? I take my boost pressure directly off of the manifold so I ll know exactly how much boost is in there. Plus mine was running through a A2A intercooler. My truck also had a cam, headers, P&P heads and other factors that reduce boost pressure. Quote Link to comment Share on other sites More sharing options...
Blazerdave2000 Posted March 8, 2013 Report Share Posted March 8, 2013 All stock internals. I have long tube headers high flow cats and x pipe. 60 pound injectors and that's pretty much it. The pulley is 4.25 I measured it. And I called whipple tech support also and talked to 2 diff guys and they all said should be around 5 pounds of boost. They can't explain why I have 10 Quote Link to comment Share on other sites More sharing options...
Link2603 Posted March 8, 2013 Report Share Posted March 8, 2013 Hmmm I've never heard of one making that much boost on a 6.0 with a factory pulley. I had to spin the shit out of my to make that much boost Quote Link to comment Share on other sites More sharing options...
MID12sSSS Posted March 8, 2013 Report Share Posted March 8, 2013 Yeah. I dont know. Maybe post a pic of where you tapped in your boost gauge? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.