Twin scroll T3 manifold
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From: Milwaukee
Actually, the divided T4 housings can be had in the following ratios:
.58, .70, .84, 1.00, 1.15, 1.32, and 1.59
AFAIK, none of them are hard to get, but I'm uncertain as to fitment compatibility between T series vs. GT series turbos. Anyway, here's a sample of some listings:
http://www.turbocharged.com/catalog/thousing.html#t4
.58, .70, .84, 1.00, 1.15, 1.32, and 1.59
AFAIK, none of them are hard to get, but I'm uncertain as to fitment compatibility between T series vs. GT series turbos. Anyway, here's a sample of some listings:
http://www.turbocharged.com/catalog/thousing.html#t4
From Garrett's website, the only twin scroll T4 housings they have are .85, .95, 1.06, 1.17 and up from there.
That's good to know though, at least I would have somemore options. Thanks.
Last edited by Frenchy4g63; Apr 20, 2007 at 06:54 PM.
if geoff @ full race needs a 91 octane guiny-pig, count me in!
The twin scroll design, along with the smaller primaries is what i have been working with for the last ~15 years! Either 2.75L v6's or 2.65l v8's spinning +17k & making positive boost @ 4,200 rpm!
it's great to see people putting those components into a evo.
The twin scroll design, along with the smaller primaries is what i have been working with for the last ~15 years! Either 2.75L v6's or 2.65l v8's spinning +17k & making positive boost @ 4,200 rpm!
it's great to see people putting those components into a evo.
Last edited by Aby@MIL.SPEC; Apr 21, 2007 at 06:05 AM.
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I haven't seen any Green's make over 400 on pump and I have only seen one of those. The Green is a great option over a stock turbo and honestly I may have considered it, if it had been available, before going the way I did, but I would hardly compare it to a 3076 when discussing ultimate power. The 3076 can make over 500whp on race gas easily. A Green cannot match this. 53lb/hr vs 47lb/hr. That's roughly 60hp more potential with a 3076. Alot of people dislike the 3076 but I have to say that for me it's perfect.
I think the Green is a great turbo and is a nice upgrade for someone looking for 30 or so more whp than stock without giving up much spool. Ultimately though, it is a 47 lb/ hr wheel and subject to the same laws of physics as every other turbo.
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Well, your (Ted's) goals are exactly what I want.
I'm thinking a HTA35R with a .85 a/r T4 housing would work really, really well.
The HTA wheel and twin scroll design should help spool and mid range power, while the larger housing allowing all the peak power. Sticking with the 2.0, I'd like to take advantage of the high rpm capability, and dont want to have back pressure issues.
I'm thinking a HTA35R with a .85 a/r T4 housing would work really, really well.
The HTA wheel and twin scroll design should help spool and mid range power, while the larger housing allowing all the peak power. Sticking with the 2.0, I'd like to take advantage of the high rpm capability, and dont want to have back pressure issues.
I think .78 is perfect for a gt3082r considering an fp3065 is a .70 and makes sick power. Looks like improved spool and greater top end than the fp unit on paper, however, FP's housing is internally mirrored after the new GT housings designed around the new GT wheels and this twin scroll is some sort of retro fit jobber.
A/R ratios are exactly that, ratios. A .70 A/R T4 hotside is volumetrically huge as compared to a .82 T3 hotside, so one cannot realistically say that if such and such works well with a T3 hotside of a specific A/R that it translates directly to the A/R of a T4 hotside.
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I never once mentioned a T4 however we are 100% in agreeance on what you just said.
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From: Milwaukee
Who and what is hta?
I think .78 is perfect for a gt3082r considering an fp3065 is a .70 and makes sick power. Looks like improved spool and greater top end than the fp unit on paper, however, FP's housing is internally mirrored after the new GT housings designed around the new GT wheels and this twin scroll is some sort of retro fit jobber.
I think .78 is perfect for a gt3082r considering an fp3065 is a .70 and makes sick power. Looks like improved spool and greater top end than the fp unit on paper, however, FP's housing is internally mirrored after the new GT housings designed around the new GT wheels and this twin scroll is some sort of retro fit jobber.
So I'm thinking about doing a twin scroll T4 flanged manifold, with a .85 a/r T4 twin scroll turbine housing on the HTA 35r. Which is why Ted mentioned the T4 housings.
Basically a twin scroll T4 35r, with better midrange and quicker spool, due to the HTA wheel and the twin scroll design.
The .78 a/r T3 housing your mentioning uses a divided housing. Generally when you go to a twin scroll setup, you need to use larger than normal turbine housings. Personally I believe that housing is too small for a 3082/3065. I still think it would be become a restriction on a 3076 if you were trying to max it out. Although according to TedB, it works very, very well.
The 3065, 3082, and HKS 3037, are all the same turbo, just different names.
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The HTA turbo's are a line of custom compressor wheels designed by FP. Dave Buschur has one, the only one as far as I know, and it makes a little more power than a standard 35r. But, it makes a lot more midrange power, spools faster, just better in every way.
So I'm thinking about doing a twin scroll T4 flanged manifold, with a .85 a/r T4 twin scroll turbine housing on the HTA 35r. Which is why Ted mentioned the T4 housings.
Basically a twin scroll T4 35r, with better midrange and quicker spool, due to the HTA wheel and the twin scroll design.
The .78 a/r T3 housing your mentioning uses a divided housing. Generally when you go to a twin scroll setup, you need to use larger than normal turbine housings. Personally I believe that housing is too small for a 3082/3065. I still think it would be become a restriction on a 3076 if you were trying to max it out. Although according to TedB, it works very, very well.
The 3065, 3082, and HKS 3037, are all the same turbo, just different names.
So I'm thinking about doing a twin scroll T4 flanged manifold, with a .85 a/r T4 twin scroll turbine housing on the HTA 35r. Which is why Ted mentioned the T4 housings.
Basically a twin scroll T4 35r, with better midrange and quicker spool, due to the HTA wheel and the twin scroll design.
The .78 a/r T3 housing your mentioning uses a divided housing. Generally when you go to a twin scroll setup, you need to use larger than normal turbine housings. Personally I believe that housing is too small for a 3082/3065. I still think it would be become a restriction on a 3076 if you were trying to max it out. Although according to TedB, it works very, very well.
The 3065, 3082, and HKS 3037, are all the same turbo, just different names.
I don't believe your statement is accurate. Why would you need to use a larger A/R to take advantage of the twin scroll? The basis for the twin scroll is to use a manifold design that more efficiently uses the exhaust energy to spool the turbo.
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That statement is highly doubtful considering the knowledge, modelling, prototype capabilities and expertise required to actually design a wheel. The most likely scenario is that FP has found a wheel from some other application and applied it to the GT35R. This approach is the same used for the 67mm wheel that a lot of people now use.
I don't believe your statement is accurate. Why would you need to use a larger A/R to take advantage of the twin scroll? The basis for the twin scroll is to use a manifold design that more efficiently uses the exhaust energy to spool the turbo.
I don't believe your statement is accurate. Why would you need to use a larger A/R to take advantage of the twin scroll? The basis for the twin scroll is to use a manifold design that more efficiently uses the exhaust energy to spool the turbo.