Thinking about trading up to Super 70

[John B]

I may now be pushing the limit a bit with my Super 60 turbo. I think a GN compressor wheel with a stage 2 turbine would be about right for my setup. I've checked the vendor's sites and they don't list any turbine wheel options for their "Super 70s" and they don't specify which compressor wheel they use. Any suggestions?

[Force Fed Mopar]

What set-up do you have? I have a Super70 on my GLHS, I believe it's just a stock GN wheel and housing. I'll see if I can get Steve to post some answers for ya, he built my turbo.

[GLHS613]

John,

I have the exact combo you mentioned (Super 70 Comp Wheel in the stock comp cover, Stage 2 Turbine wheel in the stock .48 A/R exhaust housing). The comp wheel was in fact used on the GN's. It has a 1.958" inducer and a 2.758" Exducer.

I had TEC do mine. It's a custom setup to machine the .48 exhaust housing to fit the stage 2 wheel so it'll cost ya. Jim Latour is his name, here's a link to his site http://www.turboengineering.com/


Steve

[Mario]

Here is Turbos Unleashed's S70 unit: http://turbosunleashed.com/shop/product_info.php?products_id=127

I'm not sure if you're running the .48 A/R Turbine Housing Currently, or the .63 A/R housing, but I'd opt for .63 A/R if you think you're pushing the limits of the S60.

Here's the thing though, it's $625 for the S70, plus $175 for the Turbine Housing Upgrade. That's $800. At that point you might as well go with a full hybrid as it's cheaper and depending on your set-up, you may be able to make better use of one.
http://turbosunleashed.com/shop/product_info.php?cPath=21_87&products_id=187

Another option, is if your current turbo already has the .63 A/R housing, you could just get both of the housing machined for the new wheels and buy both wheels, install them, and then get it all balanced. :crazy:

Just trying to give you a few options. I probably am not making any sense and am not saying I'm an expert on turbos. If you gave Chris a call at TU I'm sure he'd help you out with what you need and can guide you better.

[GLHS613]

John,

Mario is right, depending on what A/R exhaust housing you have, it may be about the same price to just upgrade to a T3/T4. If that's the case, I would reccomend doing it as the Super 70 will never match a T3/T4.

The only reason why I went the S70 route was because it was a drop-in instalation and the S2 exhaust wheel set me up for an easy conversion to a T3/T4 at a later date (I've got the parts to build up a 46 trim T3/T4).


Steve

[Force Fed Mopar]

What's the exact specs of my S70 again, Steve? GN comp wheel and what spec exh wheel?

[GLHS613]

Rob,

Your S70 has a stock exhaust side with the exception of a clipped exhaust wheel. Exducer=1.925"OD, Inducer=2.315"OD


Steve

[John B]

How do you like the S70? What were you using before?

[Force Fed Mopar]

I like it, I had a stock Garrett before. The S70 spools pretty quick, not much slower than the stocker, and it's good to about 20 psi reliably. Right now I'm only running 15 psi, will bump it to 18 or 20 once I get my MAP sensor.

[Omnious]

My thoughts on the s70. It seems to spool ok but the lower end power was missing, it didnt seem to make anymore power past 18psi. the boost was way more agressive then the stocker mine has a stock .48 hotside

[Force Fed Mopar]

My thoughts on the s70. It seems to spool ok but the lower end power was missing, it didnt seem to make anymore power past 18psi. the boost was way more agressive then the stocker mine has a stock .48 hotside

Yeah mine's the same way, on take off it's kinda soggy, unless you dump it hard, in which case I just spin and spin, thru 2nd, even with 225/50's. I have a stock .48 turbine as well but with a clipped exhaust wheel. Also I have a small wastegate can shimmed out, I get 16 psi but I was told that's probably the limit of the small can.

I find I seem to launch the best at part throttle and letting the clutch up easy, then hammering it. It'll break the tires loose as soon as it spools past 10 psi, I let it spin for about 2-3 secs then hit 2nd. Depending on road surface and conditions, it'll usually grab and go after a little wheelspin. Or it'll just smoke 'em:thumbsup:

[GLHS613]

About the only advantage the S70 has over other turbo upgrades is that it's a drop-in fit. Plug and play. It'll definately give you more power potential than the stock Garrett T3 but there are definately better options out there.

My S70 is definately kinda soggy on the bottom as well but has a good mid-range hit. With having a .42 A/R comp housing with the GN 70mm comp wheel, it's not going to flow as good at high boost levels but the combo does tend to give good midrange punch. The general middle of the road comp side A/R a 70mm wheel would be a .47, and you sometimes might want to go higher.


Steve Coghill
89 Daytona Shelby TII
S70 w/Stage 2, 0.48 A/R

[Force Fed Mopar]

If it's for your V6, I'd go with a full T3/T4 turbo, the extra 2 cylinders should give you enough extra flow to spool it pretty quick.

[Force Fed Mopar]

Yeah mine's the same way, on take off it's kinda soggy, unless you dump it hard, in which case I just spin and spin, thru 2nd, even with 225/50's.

I also have a larger cam cam than stock, which probably contributes to the lag a little.

[Tbird232ci]

I would go with a hybrid of sorts. Right now, i have a T3/T04B V1 with a .63 exhaust housing, and there isnt much more lag than a stock T3, if any extra lag at all, and from my research, the turbo will support 400-450hp before going out of its efficiency range

You can easily go and order the compressor housing, wheel, and backing plate relatively cheap, ~350 bucks, then take it and get it balanced, and you can have a pretty nice setup. If you dont have a .63 housing, you could possibly go with a clipped wheel, or a stage 2 as mentioned, have nice response, but could run out of steam in the upper RPMs. Id personally run the .63 housing, i noticed that you actually gain a little bit of off-boost torque with the larger a/r exhaust housing.

[Tbird232ci]

I also have a larger cam cam than stock, which probably contributes to the lag a little.
It depends on the overlap. There are many debates, but from my experience, and experience of friends, a cam with a moderate amount of overlap helps with spool time. What are the specs of you cam?