Best turbo for the stock downpipe?

Osmosis

Osmosis

New member
I"m currenlty saving my cash for a new turbo. I was considering the G20 upgrade, but I want to get the best bang for the buck. I am also consideirng the waller upgrade over the 20g unit.

What is the best turbo upgrade I can get for my stock down pipe?
I don't know of any other options out there, however the waller unit sounds like a nice piece. I'm looking for low 12's, maybe even high 11's.


My Typhoon has a 3 inch cat back system, alky injection, ultimate chip with 3 bar map. I'm currently runing 18psi with no knock. I do plan on increasing the boost once I get time to tune my ty. Currently, I've not had time to do much tuning as I'm in the middle of major home improvement projects and trying to finish them before winter comes.
 
It's just a six

It's just a six

Super Member
Re: Best turbo for the stock downpipe?

Do you still have a stock torque converter?

If so, a straight 20G turbo w/a 14cm turbine housing will probably be slower than a stock turbo,because the spool up time is slower.

You can purchase a 20G turbo & install a 12 cm housing w/a stock torque converter,it works pretty good. The 12 cm housing will need to be machined to fit the "H" wheel.
Or call these guys: http://www.boostplanet.com/gm.htm They can make you a brand new 57 trim compressor wheel & a 12 cm housing,that is if you are going to stay w/a stock low stall torque converter.
They can also install a 60-1 wheel for you (on an OG TD06H-20G turbo) ,but you will need there bigger compressor housing,different wasetgate & so-on ,does not look stock.
You would be better off buying the used 12 cm housing a guy here on the BB is selling & send it to them.

I did this to mine,http://www.syty.net/forums/showthread.php?t=53545&highlight=60-1 ,,,,,,,, but it was a pain, It works great,but a pain to make.
 
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1madgumby

1madgumby

New member
Re: Best turbo for the stock downpipe?

Stock converter, 3 bar chip, 3' dp. no muffler or cat. with A TE-44 I went 12.20 all day long.

Aj.
 
Osmosis

Osmosis

New member
Re: Best turbo for the stock downpipe?

TYTILIDIE said:
For the stock DP, I say wallers turbo is the way to go.
Click to expand...

From what I've read, I would agree! I just want to make sure I get the best bang for the buck as I'm gonna drop a Grand on a new turbo. So far, waller has my vote!:tup:
 
WyoSyclone

WyoSyclone

Active member
Re: Best turbo for the stock downpipe?

I really like my RPM Stage1.... I don't have any experience with John's upgrade so can't comment on it, other than saying it would be an easier install than the Stage1.
 
M

MikeMcNair

New member
Re: Best turbo for the stock downpipe?

awesome info in here!!!

to the guy in here that ran 11.90's on a stock turbo: HOW?
 
JSM

JSM

Active member
Re: Best turbo for the stock downpipe?

:)

It is called tuning, and more than just a chip.

#1 biggest improvement was a 3" downpipe, porting of the exhaust housing. Helped with boost control also and gained about 8mph in the quarter.

We ran 25psi of boost, 22 deg of timing. That takes time to figure out how to do that, from the spark plug gaps, intercooler temps under control, etc.

alky injection to help keep things cool, a stock turbo at 25psi is not efficient at all and creates heat.

Tire pressure, what rpm to launch at, burnout or no burnout, suspension limiters, shift rpms.
 
M

MikeMcNair

New member
Re: Best turbo for the stock downpipe?

makes sense. i was thinking high PSI, but the turbo would be out of the efficiency zone there.,

regardless, great info in here. :tup:
 
JSM

JSM

Active member
Re: Best turbo for the stock downpipe?

MikeMcNair said:
makes sense. i was thinking high PSI, but the turbo would be out of the efficiency zone there.,

regardless, great info in here. :tup:
Click to expand...

No doubt that it is and running 11.9X on stock turbo is not the easiest way to 11 second pass. A lot of easier more reliable ways to do it, we just wanted to prove it could be done.

Stock turbo's don't seem to last as long at that boost (turbo rpm) either.
 
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