Even if he dosent have a purpose on the built..does anyone agree this would be just plain fun?

A 6-700hp supra is fun on the street, i would imagine 700 awhp would be even more fun.

 

Can't cry about 700's

 

IMO the best way to make 700whp is with a GT4088R. I wanted 700whp without giving up any spool to a 35R. In my research I found that a GT4088R with a divided/twin scroll manifold will spool the same if not quicker than a 35R with a .82 a/r housing. All while making more power.

With a twin scroll/divided mani, you need to use a larger a/r housing for the turbo however.

With a 2.3L/40R the best is 1.06 a/r.

With a 2.0L/40R the best is .95 a/r.

Otherwise, if you dont mind giving up some spool, and want to save some money, just do the T67-Ptrim/"37R" with any single scroll mani you choose.

 

you said to get a twinscroll manifold but do you get a hotside with twinscroll as well?

 

Agreed. I qualified my statement a couple posts down from the one you quoted. I daily drove it for a good while. You just have to accept what you get for spool when you run a turbo that large for racing purposes. Seeing how people tend to cry about lag on this particular forum, I tailored my response for the intended audience. It's worth noting however that there are now cam options available that are providing significant decreases in boost threshold that just weren't available 3 years ago... Makes running big turbos a little more liveable. Using one of these cam options on my 2.3/T67 would have made a world of difference for daily driving.

After having run turbos like T25, 14b, small 16g, big 16g, EVO3 16g, 6H 20g, 6H 50 trim, 6H 35R, 60-1, T67, Etc, and now EVO8 16g and EVO Green, with varying displacement, I have a good idea of what I would like in a street-strip car. The EVO Green on the street, and with nitrous on the track, is the best compromise I have found yet. I might be getting old, but I could probably only tolerate up to a 35R these days... But now I've completely digressed from the original topic, my fault.

 

Well yeah, otherwise it will defeat the purpose of a twin scroll setup. The 40R has a twin scroll T4 housing.

 

IMO there's no way a T4 gt4088r even with a twin scroll will spool as if not faster than a T3 gt3583r ..... are you sure your reading was including the fact that the gt35r would be a T3 NOT a T4 ... bc all the supra and cobra guys use a T4 gt35r....

HorsePowerFreaks has a T4 gt35r'd where they believe the bigger T4 exhaust housing will make more topend without losing too much spool... (on a side note... has of right now no one really knows ... bc their car needs a fuel system) However just by upgrading to a T4 exhuast housing they lost what i believe 400-500rpm ... u think a T4 gt4088r is gonnna be ANY better... i think not...

::shruggss:: just my opinion

 

Were they using a divided manifold? (since they switched from a T3 to a T4, I'm guessing no)

Do you have any pics of it? n/m, I found pics, single scroll mani.. so that's not at all what I'm talking about. You need a twin scroll mani AND twin scroll T4 housing.

Every time someone mentions the 40r, saying how slow it spools, was using a single scroll mani.

A twin scroll mani with a gt4088r with T4 twin scroll housing will spool about the same, if not a little faster than a single scroll mani with a gt35r (.82a/r) with a T3 single scroll housing.

I was skeptical too, but I found otherwise. The only reason I looked into it was because it was recommended by the owner/head of one of the most respected shops in the world..

 

well i stand corrected i thought horsepowerfreaks' turbo kit was divided ...

however with the t4 twin scroll housing being faster... hopefully your right i'd love to see your results! keep up updated if you do it

 

What cams are you specifically referring to?

Who makes gt4088r kits with a T4 twin scroll mani?

 

Shearer builds twin scroll T4 manifolds, also if it's not part of a kit, as it seems from their web site, i'm going to purchase one from them for trying the GT4088R turbo, on the basis of the previous T3 manifold of this brand i just own i can only say enthusiastic things of these units, and their T4 is a true twin scroll, with 2 waste gate housings....

 

The most recent results that come to mind are from the BC 280s. They've been shown to dramatically reduce boost threshold on 2.3/t67 setups recently. They have also been shown to be a bit more restrictive than some other options at high rpm, but this isn't much of a concern with strokers that are only being reved to 7500-8k. Based on the specs of those cams it's possible that similar results could be achieved with cam gears, but that is something I just don't have enough personal experience with to say for sure.

 

You read my mind im putting cam gears on my BC 280/280 tomorrow. and going to -4/-4

 

Good stuff... unfortunately it doesn't leave space for the stock A/C. Do you know of anybody that makes a true twin scroll T4 manifold that leaves the stock A/C intact?

I'd rather swap radiators than have to take out the A/C... it gets a tad hot in Arizona during the summer. Just a little.

 

I don't think it's practically possible to retain ac compressor with a T4 manifold and turbo, for me it's not a problem, as i swapped out my ac system also with a t3 manifold, because i don't drive my car on the road except some rare cases, but if you live in a so hot area it could be a great problem...