Write-Up: S/C Port & Polish

Abaddon wrote:

I just got a S/C with 60,000 mi on it for $78....gonna take that biatch apart and do exactly what this thread is about .

The reason I got it so cheap......some tech at the dealer my buddy currently works at mis-diagnosed a "knocking" sound as the S/C coupler being bad. As the customer had GMPP warranty, they authorized S/C replacement (they don't rebuild). Turns out one of the idler pulleys was bad (not the coupler), so he "got" the S/C somehow. All I had to do was get a 3.4" pulley for his daughters GP and put it on......he gave me the damn thing

Robo, porting and polishing ANY engine will gain torque and HP. The more air you suck and blow, the faster you go! <--------I'm a poet?! wtf?!

cool!
gen3 or gen5?

DB's Previuos post.
well i ported and polished my throttle body it made noticeable gains first time that i ever did that to a car big difference i filed and sanded about 1.2 ' off it nice. doin your sc must make big difference my son is goin to do his sc like yours. thanks for the pics and info

Then Double DB posted the following really intelligent post:

flyineagle96 wrote:

first of all i wasn't talking to you, and second i filed 1/16", then sanded with various grit sandpaper and ended with 1500 grit until as smooth as a babies butt. i didn't want to spend a long time typing, I'm not that good at typing, but i am good at making fists...

Lets dissect the above statement. First of all: You were posting on an open forum, not a private message board. You were talkin to everybody, Duh.
As to filing aluminum- It isn't done if you know what your doing, You grind then sand. A file will get full and ruined by Aluminum.
You did not say that you removed 1/16" of material, you wrote you filed 1.2'. ( what we don't know) As you say you were too lazy to make an accurate report of what you did for all others and maybe someone not too experienced to follow.
So, as I have been told before, If you can't post accurate information or are too lazy to, then don't post at all.!!!!
As far as being capable of making fists though, if that's your solution to being critiqued on here, then you should buy another file or two, to have, and teach your son the correct way to file a Supercharger, the Neanderthal way, with fist's clenched.
Good Riddance to you Sir.
WYGACKMHWA

turtleman wrote:

cool!
gen3 or gen5?

It's a Gen III. I would love a Gen V, but hey, $78 and not having to take mine off to work on it.....priceless

And maybe this doesn't belong in this topic, but I also got a Gen V engine minus the S/C, everything else is there......including brand new sets of Clevite crank and cam bearings, and ARP head bolts/studs. Another friend of mine spun the #5 and #6 rod bearings so he replaced his whole engine?! He just wanted it out of his garage so he gave it to me Can't wait to start the build!!!!

Quote :

i think i read somewhere that the most you can get from P&P on a S/C car ,is a little more throttle response. is that true?

I agree with turtle. P&P has little to do with throttle response (torque). Smoothing the internal pathways helps the engine breath with less turbulence at higher RPM, creating HP up top.

For more throttle response, just drop SC pulley size and control knock.

Y

Rickw wrote:

DB's Previuos post.
well i ported and polished my throttle body it made noticeable gains first time that i ever did that to a car big difference i filed and sanded about 1.2 ' off it nice. doin your sc must make big difference my son is goin to do his sc like yours. thanks for the pics and info

Then Double DB posted the following really intelligent post:

flyineagle96 wrote:

first of all i wasn't talking to you, and second i filed 1/16", then sanded with various grit sandpaper and ended with 1500 grit until as smooth as a babies butt. i didn't want to spend a long time typing, I'm not that good at typing, but i am good at making fists...

Lets dissect the above statement. First of all: You were posting on an open forum, not a private message board. You were talkin to everybody, Duh.
As to filing aluminum- It isn't done if you know what your doing, You grind then sand. A file will get full and ruined by Aluminum.
You did not say that you removed 1/16" of material, you wrote you filed 1.2'. ( what we don't know) As you say you were too lazy to make an accurate report of what you did for all others and maybe someone not too experienced to follow.
So, as I have been told before, If you can't post accurate information or are too lazy to, then don't post at all.!!!!
As far as being capable of making fists though, if that's your solution to being critiqued on here, then you should buy another file or two, to have, and teach your son the correct way to file a Supercharger, the Neanderthal way, with fist's clenched.
Good Riddance to you Sir.
WYGACKMHWA

Well said Rick!

Judging from his posts, he types with fists too. Ha.

It's scary people like him work on these cars.

!

Yup, and you got a reply to your pm. Now run along and welcome to my ignore list.

i think everyone should get a Prince Albert and shut the f..k up.

contrary to popular belief,its very relaxing.....

I'll pass.

You guys' are sooooo immature..









was that just an oxymoron? hehehe

98riviera98 wrote:

You guys' are sooooo immature.. was that just an oxymoron? hehehe

Please define what an Oxymoron is.????
Never mind I will for you.
One fine day in the middle of the night,
Two dead boys got up to fight,
Back to back they faced each other,
Drew their swords and shot each other,
One was blind and the other couldn't see,
So they chose a dummy for a referee.
A blind man went to see fair play,
A dumb man went to shout "hooray!"
A paralyzed donkey passing by,
Kicked the blind man in the eye,
Knocked him through a nine inch wall,
Into a dry ditch and drowned them all,
A deaf policeman heard the noise,
And came to arrest the two dead boys,
If you don't believe this story’s true,
Ask the blind man; he saw it too!

robotennis61 wrote:

i think everyone should get a Prince Albert and shut the f..k up.

contrary to popular belief,its very relaxing.....

I think you should keep your "Prince Albert" to yourself. If you know what I mean.
It has absolutely nothing to do with the price of Camel Hair in Mongolia.

Semi detailed overview of the areas in positive displacement supercharger porting:
http://www.superchargerperformance.com/supercharger-performance-tips/positive-displacement-supercharger-modifications

I didn't see that link until it came to this topic. Thanks Andrew & admin.

I found the part about the silencing vents enlightening. I've heard a lot about that from people but I like seeing another source say it too. They are pressure bleeds and it really makes me want to fill them on the project blower, despite my last experience.

very nice read! thank you. i've never heard of anyone porting the roof of a m90 though.

...anyone got a gen V for sale??

Mr.Riviera wrote:

very nice read! thank you. i've never heard of anyone porting the roof of a m90 though.

...anyone got a gen V for sale??

I could.. mines ported.. and would come with a gasket matched LIM thats ported AND veryyy polished.. the blower is also polished on the outlet.. unknown if it was ported.. I'd need your Gen III

Great Link man. NOW I get it......

some more work



The one lip pretty much all polished
As of now, I don't plan on opening the outlet at all.


That's the other lip fine sanded - not polished yet


did a quick job on the bottom too just for shits really. I'm planning to get this all CNC'd along with the bridge removal and whatnot.

Turtle wrote: "I'm planning to get this all CNC'd along with the bridge removal and whatnot.
So, the little bit of work in the previous picture was just to experiment and play around a bit, i gather.
With your intentions of having the outlet port milled and bridge removed, I have a question. Are you removing the bridge for Inter-cooling or not.
I've read where removing the bridge is only beneficial if your going to add an inter-cooler.
Is that what you are going to do.?

Rickw wrote:

Turtle wrote: "I'm planning to get this all CNC'd along with the bridge removal and whatnot.
So, the little bit of work in the previous picture was just to experiment and play around a bit, i gather.
With your intentions of having the outlet port milled and bridge removed, I have a question. Are you removing the bridge for Inter-cooling or not.
I've read where removing the bridge is only beneficial if your going to add an inter-cooler.
Is that what you are going to do.?

Right. This blower isn't going on until I have a full size IC.

The edges of the outlet triangle most likely will be retained since there's no work that needs to be done to them by a machine.

Rick, i removed my bridge and opened up the LIM when i ported mine but have not installed an I/C (yet). i see no down side to doing this if you think you might go I/C later. i still get full boost and have no KR with my mods and 15.5* timing.

More images of SC work:
https://rivperformance.editboard.com/series-i-engine-transmission-f13/project-plug-silencer-holes-and-new-m62-porting-t7099.htm#107920

Some progress pics of my Gen V.
i've only been working on it today, but it will be similar in shine to turtleman's gen V above.

I used different grit sand paper up to 600wet. i will be using a buffing wheel on a drill with compound too.

i am trying to get someone at work to WELD the silencer vents closed too