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Old 05-25-2006, 07:49 AM   #1
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Default general supercharger info

Ok, so I got a spare super charger that I'm going to port then stick on the car. I also got a LIM to port. What are the best things on these to port? How do I tell if the rotor coating is still good and what should I clean them with to check?
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Old 05-25-2006, 09:13 AM   #2
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Do a quickie search and find Willwrens supercharger page link. (I think it'* at the top of this forum as a sticky)

That will help you out a little. As for porting an LIM .. unless you are going to push the limits on the car.. you won't gain much by porting the LIM..it'* pretty free flowing from GM.
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Old 05-25-2006, 05:46 PM   #3
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well the lim had a real rough feel on the inside so I was thinking polishing it would produce some notable gains
yea I checked out the sight its tells me some but its still under constuction nice site tho will
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Old 05-25-2006, 06:14 PM   #4
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Think of the LIM as a true manifold. It'* only 'storing' air, waiting to be used. The flow in the main body does not follow the surface, but rather it'* a 'stored charge' when the boost accumulates.

The areas where surface friction can cause heat from the flow crossing rough surfaces is at the inlet of the supercharger (rough casting), the outlet (sharp edges), and the 6 ports of the LIM.

The hottest surface during normal operation (due to air friction) is the inlet of the SC directly behind the TB.
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Old 05-25-2006, 08:39 PM   #5
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will ill remember that
so porting/polishing the LIM is a waste of time?
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Old 05-26-2006, 12:12 AM   #6
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NO. I didn't say that at all.

Let me re-phrase this (then go back and read what I wrote above):

Porting anything that doesn't match the adjacent surface will help. (match the port sizes from the LIM to the heads).

POLISHING should be done in any flow-restricted area. Supercharger INLET, supercharger OUTLET, and LIM OUTLETS.

If you don't know what this means, find out from someone who can explain it better than me, or don't attempt it. There is a great potential for self-inflicted damage here. Ask Matt. He ruined his first manifold.
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Old 05-26-2006, 02:32 AM   #7
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Yes, Matt certainly did, i learn things the hard way, but ive sucked it up and orderd another LIM.
They are VERY tricky if you have never done it before.
It has to be perfect, it cannot be anything else.
Once you have removed to much, thats it. Get out your money.
If you feel confident enough to try it, do so, and take lots of pics, make notes, and take VERY carefull measurments.
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Old 05-29-2006, 06:29 PM   #8
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Bill your site isnt working for me I cant get past the home page.
Could somone do a detailed writeup or somthing because I am seriously considering doing this?
I know it would take some time but I would realy appreciate it
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