I'm thinking about going TS if I get sent to afghanistan\Iraq again. If I make it back, I'd probably do it. So,which is better for higher torque numbers?

T3 or T4? Which divided A\R for a 35R turbo, 1.06?

Also when you go TS, do you get more torque out of switching from Single scroll? I know you get quicker spool, but does your torque curve move down or up? Or is it broader of a curve?

The turbo I have in mind is using y HTA35R for the turbo. That's depending on Force Performance putting out a bigger HTA turbo or not.

 

I'm not sure there is enough results out yet to say which A/R works bet. I believe Full Race sent EvoDan several housings to try. So even Full Race is not really sure yet.

Regarding torque, if you make the same horsepower, but make it earlier, then I think therefore that means you are making more torque.

 

No Twin scroll wizards out there that can answer this?

 

It isn't easy to answer your questions for a few reasons. For starters, we haven't seen back-to-back comparisons of the different sized TS T3 housings on an EVO with GT35R. Likewise, there are factors aside from the turbine housing that determine where the torque curve peaks. And of course, peak numbers don't necessarily mean all that much in the grand scheme of things.

Perhaps a better approach is to describe what you're seeking, and we can go from there.

 

OT for a SECOND. LT1runner, what will your job be in Irag/Afghanistan?

 

I'm in the TN National Gaurd. It will hopefully be computer work, but they place you where they need you sometimes.

 

Well I want a weekend warrior drag car that can autocross. As it sits now I know I can autocross the car. Just looking for improvement where it seems some can be made. I daily drive it now with no problems.

 

I went from a single scroll GT3076R last year and at the same boost level as my old single scroll GT3076R I gained 30 ft/lbs over the entire curve and 40hp. It is so much more fun to drive. I had one of Full Race's first twin scroll turbo manifolds on my SR20 and I am very happy with its performance. SInce I have a smaller turbo I run the .78 divided housing, I have considered getting the .82 divided housing which is not available in the US directly but can be shipped here. I think the 1.06 would be great on a GT35R but I think for daily driving I would highly recomend the 3076. Its an awesome turbo. I know my engine is different but I get full boost of 18psi @ 3800 rpm's and hold tq to 7700 rpm's which was my old redline. I have just finished building my head and changed cams so I will be reving it to up to 9500 rpm's depending on where the Tq starts to drop quickly.

I just realized you already had the GT30R once before but I personally think the GT35R is too big for autocross. You would be blown away by how much more fun the twin scroll GT30R is compared to Single scroll. Its the single most enjoyable modification I have made to my car. Well we'll see the solid lifters may be more fun now that I can Rev it like crazy.

 

I agree with everything in the above post (a 3076R with TS .78 A/R hotside is a better option), except that a spinning a 2.0L engine to 9500rpm with a 3076R almost certainly makes the car go slower and engine wear and tear much higher.

FYI

 

This sounds great. Yeah, I had a 3076, and loved it. If people don't go as big as a 35r, then I think the 3076 is the best option. I've "messed" around like you would during a autocross event, and as long as I keep the boost at 20 psi, I'll be fine. Th car performs good for me during this kind of use. I wouldn't even consider going twin scroll if I wasn't going to come into more cash like I will be when I get sent over there. It just doesn't seem worth it. BUT, the fact that teamsprock gained in HP/TQ over the single scroll is encouraging. I just hope that gain wasn't the result of a better tune.

 

No. If/when you drive this setup in TS, you won't need a dyno to know the difference.

 

Twin scolls can definitely help with spool, but often there is some loss on the top end,,, you really want the best of both worlds, find something like BW"s VNT

remember, there is no such thing as a free lunch!

 

FWIW, we're not yet seeing any loss on the top end, which seems to correlate with the outside data that's been presented. As far as no free lunch, it would appear the benefits to be due to a superior design given the inherent pulse characteristics of a 4-cyl engine. A win-win situation doesn't necessarily imply a perpetual motion machine.

 

Ala Free lunch. As long as you can afford it. Going twin scroll is like universal healthcare. You think healthcare is expensive now, wait until it's free.

As far as telling without the dyno, I can see that, but I'll still need to retune pump maps.

Best of both worlds sounds great. Makes me want to go up in turbo size. We'll see how the HTA grows.

 

Hey man, I don't think TedB knows your car is the evo pumpgas king on our dyno.... Yeah we would need to retune, That translator pro has you running very low in the load cells already, if you spool a few hundred rpm sooner, we would deffinetly need to adjust for it. So that would be what five trips down to the shop now in the last few months...

See you this weekend man, hopefully all the labonte goodies will install without issue and we can get your meth map done finally