Follow my port and polish project

Adam Connell

Monster Truckin since 87'
Oct 1, 2006
936
3
18
31
Denton, Tx
So now you did it! Do you think a Dutt Neck is next or what is your next move? Sounds like you have the potential to set the record for fastest stock turbo... The RJC pullies are a worth while investment as well. 9 lbs of rotating mass has gotta be worth a few tenths/mph. You wont get much more boost out of that turbo, but there is potential else where! I think with pullies and a dutt neck would put you down around 11.4-.5. Also if you're running on stock rims there is a ton of rotating mass to be lost there as well!
 
Jan 30, 2004
630
18
18
Boca Raton, FL
I was thinking if I should go for the stock turbo record. If I did it would be, pullies, bigger intercooler, converter, probably some head work.

I'd still would like to do it on pump on radials.
 
Dec 27, 2005
481
0
16
Very nice work.
You have a lot of time into it .

Keep up the great work!
IIRC the stock turbo record for a Syclone is 11.94 @ 111 MPH
YouTube - Jeremy Syclone
Lots of methanol,so much methnoal,they had to lean out the fuel delivery & had to close up the spark plug gap quite a bit,(was blowing out the spark)
4L80E ,3500 stall ,lots of custom tuning w/stock ECM.up to 27 PSI,but IIRC,they ran 24 ish on the record run.

I am shooting for the 11's when I get a chance to go to a track,but w/a 20 G turbo.
 
Jan 30, 2004
630
18
18
Boca Raton, FL
Very nice work.
You have a lot of time into it .

Keep up the great work!
IIRC the stock turbo record for a Syclone is 11.94 @ 111 MPH
YouTube - Jeremy Syclone
Lots of methanol,so much methnoal,they had to lean out the fuel delivery & had to close up the spark plug gap quite a bit,(was blowing out the spark)
4L80E ,3500 stall ,lots of custom tuning w/stock ECM.up to 27 PSI,but IIRC,they ran 24 ish on the record run.

I am shooting for the 11's when I get a chance to go to a track,but w/a 20 G turbo.
That's awesome. Never knew about a stock turbo Syclone record.

Yet, I did it with a stock converter :)
 
Dec 27, 2005
481
0
16
That's awesome. Never knew about a stock turbo Syclone record.

Yet, I did it with a stock converter :)
I had the stock Syclone turbo record for about 5 years w/a 12.29 @ 108

My engine was all 100 % stock long block,no methanol inj,it had a chip ,afpr,cold air intake,255 HP walbro,aux cooler (water radiator for intercooler),3" catback exhaust sys, stock downpipe.stock converter,stock trans,all else pretty much stock.. I ran 18 psi of boost pressure.

Rick
 
Jan 31, 2006
7,085
225
63
L.I NY
Did you match the gasket to the exhaust manifold's out let.
How thick are the edges near the top (according to your pictures).
If I take mines all the way to erase the carbon mark it would leave my walls on that same top section about 1/8 inch think.

this is what mines looks like http://www.turbobuick.com/forums/turbos-turbo-related-parts/280681-exhaust-housing-porting-questions-pictures.html


Today I worked on the turbine housing and finished up the exhaust manifold. I used a copper turbine to manifold gasket as a template and ported away.

On the right is the stock housing inlet, on the left is the ported one.



This pic shows the stock housing with the copper gasket revealing the ridge that the air sees coming out of the manifold.


Here is the ported housing, no ridge to speak of.


A shot of inside the inlet of the housing. Another thing I did was radius both sides of the wastegate hole. That should help some with air flow.



Here is a shot of the manifold flange. I used a belt sander with 50 grit to get the surface nice a flat. Hopefully I'll have no leaks.
 
Jan 30, 2004
630
18
18
Boca Raton, FL
If I recall, I didn't have to gasket match the manifolds, I just cleaned up the inside weld on it.

I didn't measure the wall thickness, but judging by my pictures, it's most likely over 1/8".
 
Jan 31, 2006
7,085
225
63
L.I NY
If I recall, I didn't have to gasket match the manifolds, I just cleaned up the inside weld on it.

I didn't measure the wall thickness, but judging by my pictures, it's most likely over 1/8".


Did you take that same gasket (turbo to header gasket) in the pictures above and match it to the exhaust manifold?
Was it bigger or smaller then the exhaust manifold?

thanks for your help.
 

HP Man

Member
Mar 31, 2007
140
0
16
A Great Posting. Enjoyed all the detailed photos and hard work. Little things do help on any performance build-up. I ported my first set of exhaust manifolds but not as much as yours, then welded the tubes on the outside only as most of the internal welds were ground away. I got all my welding done for free at one of my customers sheet metal shop. Keep us posted on any more track times and mods. Gene