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:
after rough cleaning of rotor walls:
before port:
after port and polish completed:
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10-24-2011
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:
after rough cleaning of rotor walls:
before port:
after port and polish completed:
Last edited by logan809; 10-24-2011 at 01:26 PM.
10-24-2011
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.
10-24-2011
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
Originally Posted by AmericanSoldier
10-24-2011
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.
10-24-2011
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.
10-24-2011
you shouldn't have touched the insides, like the others above have said. you may have just screwed yourself over and ruined the case.
10-24-2011
Should have done some research before taking the die-grinder to it:
10-24-2011
Haha whatever you guys say...haven't lost a bit of boost so I'm really not too worried about it.
10-24-2011
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.
10-24-2011
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
Originally Posted by AmericanSoldier
10-24-2011
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.
10-24-2011
IMMABOOSTIN' muh LEGO'S!
10-24-2011
And no, opening up the OUTLET lowers boost levels...more flow.
Less heat, less parasitic loss, less restriction.
10-24-2011
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.
10-24-2011
Probably because you fixed a vacuum leak somewhere.
10-24-2011
I fixed all vacuum leaks weeks before I did the LIM gasket and didn't change.
10-24-2011
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.
10-24-2011
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.
Originally Posted by The Sunfire Guy
10-24-2011
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.
Originally Posted by AmericanSoldier
10-24-2011
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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