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First Port&Polish attempt

logan809

logan809

New member
I was doing an LIM gasket and decided i would port and polish my SC while i had it off. heres some pics
right after rotor removal:
image.jpg

after rough cleaning of rotor walls:
image1.jpg

before port:
image2.jpg

after port and polish completed:
image3-3.jpg
 
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And, you now have a paper weight!

You cant touch the walls of the blower... there is a -.002 interferance with the case, it is what creates the seal that keeps boost in your motor.

Someone probalby has a new blower around here for around $100.. so it shouldnt hurt too bad.
 
I saw first attempt at Porting and Polishing and got all excited... and you did well for first try on porting.
Some waviness I can see that could be touched up, and more rounding could be done... but not bad

As far as polishing, you did well, except for like darkhorizon said... there is a very small gap for cleaning, and the EGR would just make it all dirty again by the time your engine warmed up to proper operating temp, which is why nobody worries about the inside. Its not like anyone would see the inside anyways. Polishing the supercharger usually refers to the outside casing.

Nice work tho
 
OUCH... that blows man. the rotor pack wears to the case anyway. im not a fan of swapping cases as i feel this could result in a bad seal too. like said if you sanded the walls of the case it is time for a new blower.
 
FWIW I advise not to clean the inside area where the rotors sit. Becuase of the clearance issue. The bigger gain could be had at the inlet end and smoothing the roughness.
 
you shouldn't have touched the insides, like the others above have said. you may have just screwed yourself over and ruined the case.
 


You going by an actual reading or the Giant Pile tinker toy block sticker looking boost gauge?

Regals have a digital numeric readout. In case one of you guys I'm normally picking on is wondering.
 
logan809 said:
Haha whatever you guys say...haven't lost a bit of boost so I'm really not too worried about it.
Click to expand...

I imagine you feel like you didn't lose any boost, but really you did. Porting the outlet should have allowed more air to be pushed into the LIM thereby giving the engine more power. You don't notice any loss because you killed pressure with the polishing, but upped the outlet so you countered your own modification. You have a ported blower that might be performing like a stock blower, grats
 
well... opening the outlet would have allowed more boost and polishing the walls would have lowered it... the outlet looks great. you may have a net gain. but still lost some from polishing the walls.
 


Z34Phoenix said:
well... opening the outlet would have allowed more boost and polishing the walls would have lowered it... the outlet looks great. you may have a net gain. but still lost some from polishing the walls.
Click to expand...

And no, opening up the OUTLET lowers boost levels...more flow.

Less heat, less parasitic loss, less restriction.
 
I guess ill make myself look like a dumbass and say giant pile tinker toy guage. Alls I know is it never maxed out until now.
 


I lost about 2-3psi according to the real gauge in my Bonne when the coating got stripped off the rotors (long story abotu TB cleaner).

You probably lost a pound or so.. power will still feel pretty good and well.. I think maybe you could buy a sticker that shows a maxed out block toy thing.. or glue some legos there. Remember go with red and yellow blocks only. Green don't match well. :th_peaceout:
 
I have a 97 blower if you need, it needs fluid cuz most of it leaked out cuz i stuck the blower upside down on the shop floor.

And Bill why you always got to be hatin on us GP guys cuz we got the short end of the stick when it came to everything but the engine and trans over the other l67 powered cars.
 
logan809 said:
Alls I know is it never maxed out until now.
Click to expand...

Regardless if you think you "fixed all vacuum leaks weeks before I did the LIM gasket and didn't change", you didn't. Mine pegs the gauge at 3/4+ throttle, if yours does not, there is a leak somewhere. You prolly just got it fixed once you put everything back together.
 
Well maybe your right bill....but Im not planning on taking my car to the drag strip anytime soon so not a huge deal for me
 
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