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Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 01-26-2006, 10:38 AM   #31
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What I was saying was you can have them coated, then underdrive the blower to the boost you want. It'* better then getting the boost you want with a higher blower speed. See where I'm going here?
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Old 01-26-2006, 10:41 AM   #32
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www.canadiansupercharger.com will Teflon Coat for an $80 up-charge. It'* not the same epoxy coating they had OEM, but it is proven to last.

If you sent your assembly to them, it would be the cost of bearings/seals plus 80. I spoke with them about this yesterday.
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Old 01-26-2006, 10:46 AM   #33
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Thanks for the link, Will!

I do see where you are going J. You are correct. As I said, the Lightning guys run 8lbs boost stock. I believe that the bottom end will hold it for a while anyways...
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Old 01-26-2006, 10:56 AM   #34
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We need to be thinking of CFM, not PSI. A bone-stock M62 or M90 will run 8psi, but the M90 flows more CFM'* at that pressure, and the M112 even more yet.
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Old 01-26-2006, 12:29 PM   #35
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Correct, but you also have to look at it this way. I have a 330CI SOHC V8 with identical heads/cams/intake as the Lightning, that will be going into my car. So I can safely use that stock 8psi of boost as a good number to start with. I MAY port the heads a little, but only on the exhaust side to go with my PEM'*.
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Old 01-26-2006, 02:44 PM   #36
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Same compression ratio?
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Old 01-26-2006, 02:56 PM   #37
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That'* a very good question.

Use this chart to see where you'll end up. Your project car is likely to be a higher compression ratio than an OEM supercharged car.


Simply find your SC (intended) boost level on the vertical, then draw a line over to where the compression ratio of your engine (diagonal lines) meet. Then draw a line straight down to see your effective ratio.

In my case, I'm at 11psi of boost at WOT, and a compression ratio of 8.5:1, so I end up at an effective compression of about 11.2:1.
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Old 01-26-2006, 02:59 PM   #38
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With the PI block and PI heads, it'* 9.3 or 9.4:1. So roughly 11.75:1 effective. 8 lbs boost
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Old 01-26-2006, 10:12 PM   #39
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Just curious, If you used the exchanger from the stock setup with the a/c what are the chances of turning your manifold into a big chunk of ice?
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Old 01-26-2006, 10:14 PM   #40
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Well I now have a spare case and set of rotors that need to be reworked. I bought a used M112 off of eBay for 213+shipping with 38K on it. Not bad if you ask me. The pics clearly showed me that the rotor coating is intact and I firmly believe this will expedite my project. Next step, piston rings and a can of acetone to get the old ones out(stupid carbon!)
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