gt30 turbo?

akexnads · Nov 3rd, 2007, 02:25 AM

I have the baby turbo (t-20) now, and was thinking about upgrades in the future. For now I am pretty satisfied with the little bitty turbo, it spools darn quick. Any I know the most popular upgrade is the "disco potato" , but I was wondering if any had used anything like an externally wastegated gt30 series turbo? I know I would need to weld a t3 flange on to my current manifold, but is there anything I should be aware of? Is this a plausible idea or is this just a pipe dream?

RallyBob · Nov 5th, 2007, 01:14 PM

What about a GT3071 w/ internally gated T25 flange? As long as your manifold allows for the larger compressor housing clearance, it should bolt right up.

Bob

akexnads · Nov 5th, 2007, 04:29 PM

Awesome news I might have to try that. Would an external wastegate cause clearance issues? I am just curious because I have never seen it done on a ga16 before, and would like to try it if possible. I currently have a tsi manifold if that helps.

RallyBob · Nov 6th, 2007, 03:20 PM

If you are planning on running a larger turbo at modest boost levels, then an external gate can certainly control it far better. You could either weld the stock T25 gate shut or make a rigid actuator arm to hold it shut, then run the external gate. I was thinking that in terms of simplicity (your outlet flange and downpipe configuration), the T25-flanged GT3071 might be an easy fit.

Phoenix turbo offers such a turbo, as does ATP turbo. I'd probably stick with the .64 AR on a GA16.

akexnads · Nov 6th, 2007, 05:09 PM

Awwright, thanks for the advice. After I work on my engine management I will be upgrading the turbo and put a little more thought into which direction I will go with things. Thanks again.

**wes** · Nov 6th, 2007, 06:34 PM

My first question is what are your power goals. The GT28RS or it's big brother the GT2871R can support between 340 and 400 hp. The 30R is a great turbo but requires more work than these two choices and is somewhat pointless unless you have a seriously built motor.

I am moving this to the Forced Induction section as it is better suited to that forum.

akexnads · Nov 6th, 2007, 07:45 PM

I will never break even 300hp so the gt28 will work for my power goals. I honestly didn't know it supported that much power. Guess I should have done a little more research. Thanks for the advice.

RallyBob · Nov 7th, 2007, 02:30 PM

Quote:

Originally Posted by wes

The 30R is a great turbo but requires more work than these two choices and is somewhat pointless unless you have a seriously built motor.

Shhhh, now you've ruined the surprise Wes!

I was secretly hoping he'd shoot for a 450 whp GA16....

Bob