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How do I make more boost????

 
Old 07-20-2004, 09:10 PM
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Default How do I make more boost????

My P1SC is making about 5.5 psi with stock ATI crank pulley and a 3.2 sc pulley. I want to make 7-8 psi. I can't find a MMS crank pulley anywhere and don't want to go to a smaller sc pulley, as I'm having belt issue already with such a small sc pulley. I don't have a ton of extra $$$$ to get 8 rib set up. What can I do? I thought about hooking my leaf blower up to my P1SC, but that looks a bit strange...lol Anyone know what the options are. Please help!!!

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Old 07-20-2004, 10:12 PM
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If money is the issue, get the 6 rib spring tensioned SDCE set up then. Its a lil less than the 8 rib set up.
J
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Old 07-21-2004, 12:18 PM
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2000silverbullet

I am glad to see someone else only seeing 5.5 psi with a P-1SC-1 and a 3.2 pulley. When you say you only see 5.5 psi with a 3.2 pulley, people tell you how they are seeing 7-8 psi with that same set-up and that something must be wrong.

My SD Concepts 8-rib set-up is on the way, so lets hope I can start seeing 7-8 psi
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Old 07-21-2004, 10:35 PM
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Do they take sad pictures of a guy who is really wanting just 7-8lbs of boost as payments? Probably not...... Good luck with the 8 rib set up!

I would get 6 rib set up, I'm still not sure about pulley size to get the boost I want. I already have 3 pulleys and no numbers that I'm happy with. If the belt is slipping that much, it makes it very hard to determine what size vs. tension.
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Old 07-21-2004, 10:47 PM
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I'm not sure what you want to hear. You want to make more power and not spend much money. Modding doesn't work that way. To get more power you can change the pulley, go to an 8 RIB setup, add a blower cam, etc .. All options are going to cost you a few bucks.

Good Luck,

Mark
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Old 07-21-2004, 10:47 PM
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what sizes do you have now??? more info and what boost you saw with each will help us help you.....
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Old 07-21-2004, 10:52 PM
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I had the same problem with my P-1sc-1 and 3.2" pulley. Then I got an MMS 7.85" crank pulley and a 3.7" pulley. I know that I see 5 psi as soon as I go WOT and 8 psi by redline! I would try the spring loaded tensioner from SDCE. Everyone I have talked to says that it works great!
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Old 07-21-2004, 11:05 PM
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With stock crank pulley and 4.10 sc pulley I saw 2psi > with 3.4 pulley 4psi > with 3.2 5.5psi. I'm not sure if there is a lot of slipage. I don't see any blk dust from belt and I'm using a gator back with tons of belt dressing. I never hear any strange noises either. Trust me > I understand spending money. I just don't like mis-spending money. Just looking for some help, thats all.
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Old 07-21-2004, 11:15 PM
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What RPM are you shifting at?? Im using 5800RPM is these equations..... your spining the blower at 43,472 rpm's now and seeind 5. psi of boost with the 3.2" blower pulley with the MMS crank pulley and the 3.4" blower pulley you will be spinng the blower at 54,903 RPM's...... and alot more boost......... id keep the 4.1" pulley u might need it...... i was seeing 7 psi with my D!-sc before with a 3.2"blower pulley and withth e MMS pulley and a 4" blower pulley i was seeing 11 psi...... Hope that helps...... get a MMS crank pulley.
Kyle
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Old 07-22-2004, 12:35 PM
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I will let you know what psi I get with my SD Concepts 8-rib set-up and a 4.0 pulley. Since we are seeing the same boost (5.5 psi) before the 8-rib, we should have identicle results.
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Old 07-22-2004, 03:45 PM
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Where can I get a MMS pulley? The MMS web site is no longer in business. Anyone know of any other options of pulley designers?
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Old 07-22-2004, 05:22 PM
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Going have to find a used one. I used to run the MMS with a 3.4 successfully, a little slip. When I tried the MMS and a 3.2 it was slip city and would toast a belt after two to 3 runs.
J
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Old 07-22-2004, 07:06 PM
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Originally Posted by 2000silverbullet
Where can I get a MMS pulley? The MMS web site is no longer in business. Anyone know of any other options of pulley designers?
Check with Strictly Performance. They told me they were going to continue to make the MMS Pulley.
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Old 07-22-2004, 09:30 PM
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I'll try and contact them. Thanks for the info.
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Old 07-23-2004, 03:45 AM
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Originally Posted by 2000silverbullet
My P1SC is making about 5.5 psi with stock ATI crank pulley and a 3.2 sc pulley. I want to make 7-8 psi. I can't find a MMS crank pulley anywhere and don't want to go to a smaller sc pulley, as I'm having belt issue already with such a small sc pulley. I don't have a ton of extra $$$$ to get 8 rib set up. What can I do? I thought about hooking my leaf blower up to my P1SC, but that looks a bit strange...lol Anyone know what the options are. Please help!!!

I had some issues as well with the P1SC on a modded motor, in a C5. 3.5" pulley I was getting 5-6psi. I fixed some tensioner/slippage issues and went to 6-8psi. Installed 3" Reichard pulley, 10psi. Then upgraded to D1SC/3" Reichard, 14psi to 5k, 9psi to 6k. Installed A&A bracket, and found crank pulley traction, 14psi to redline. Hope this helps.
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