Discussion in 'Engine Tech' started by DougsfastZ, Jul 27, 2008.
Awesome , great write too
congrats on the 11 sec slip!
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!
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.
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
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.
That's awesome on no meth and such low boost.
Good to hear about the Syclone's. I do need a work truck soon, hmmmmmm.
love the porting work want to say thanks.
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/tu...haust-housing-porting-questions-pictures.html
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.
I'm taking the stock turbo off in a couple of weeks, I'll take a picture of the gasket on the manifold and show you how it looks.
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
Here ya go. Same copper gasket in the earlier pictures in this thread.
what does the turbo side look like?
you have been a great help.
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