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Discussion starter · #22 ·
so parallel is actually better? wouldnt there be more power, but generally make more lag? what is the power difference on parallel compared to sequential?
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technically yeah the parallel is better since where turbos are getting to the point where there is very little turbo lag its kind of useless to have a squential set up unless you have a huge motor which can handle the boost of a huge turbo lol. but yes in all theory we will have more lag with the parallel set up vs a squential but it also depends on the tunes and piping also the turbos.....

put it this way i told you to roll a pipe inside another pipe and expected you to get a quick rpm out of the turbine wheel... now we have oiled ball bearings which have less friction and can spin alot faster without breaking.
thats the tech adv. thats all i'm talking about.
anyways you can shoot for the squential set up like i aim but it;s gona be a pain in the ass cause you have ot have both turbos linked as well as the piping and then getting an ECU to control it all.
take a look at the old post i brought up i have a bunch of info on single , parallel and squential turbos set ups on it :)
 
Discussion starter · #23 ·
so how much more does a twin turbo run than a single turbo??is it more tubing or just another turbo you have to buy?
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more meaning cost? or hp?

cost obviously its just gona cost you tubing and the other turbo and bov and blah blah blah

hp it all depends on the pressure you decided to put into the engine. obviously if i have one fan... i can only do so much.... now if i have two fans.... i can push a bit more air into an engine right. but a downfall is our engines can only hold so much pressure but as far as saying i now have two turbos and can produce twice the power... it won't work that way. your probably looking at 150-200 hp max extra out of the next one even though it says its good for another 450 hp.
depending on the turbos you can put out to 500 hp and after that your looking at a different engine i'm assuming after all the rebuilding haha.
 
Discussion starter · #24 ·
GT2871R
Dual Ball Bearing GT2871R turbo assembly with T25 style turbine inlet. Comes with internal wastegate pre-assembled when purchased with T25 style housing.
Optional "T3/T4 drop-in" style turbine housing available for an easy retrofit into older T3 based applications where T3 turbine the inlet flang is required and either internal or external wastegate are used (internal wastegate assembly is not included when ordering T3/T4 drop-in configuration).

This turbo is great for small displacement engines up to 2.2L and has the ultimate spool up time compared to other units. This turbo has a flow capacity of about 400HP. The external packaging of this turbo is identical to that of the GT28RS and can be a nice stealty upgrade to step up to 400HP of flow without much re-arrangement

GT28RS
Dual Ball Bearing GT28RS turbo assembly with T25 style turbine inlet. Comes with internal wastegate pre-assembled. This turbo is great for small displacement engines up to 2.2L and has the ultimate spool up time compared to other units. This turbo has a flow capacity of about 350HP. This turbo would be comparable to the HKS GT2530.

GT3071R-WG
Based upon the same turbo as the HIGH flowing, larger framed GT3071R, but conveniently packaged into the same style turbine housing as the popular GT28Rs/GT2871R turbos. This turbo is uniquely configured with its own turbo wheel trim, turbine A/R, and compressor housing. Unlike, the GT28RS and GT2871R, this turbo now has a much larger compressor housing to support the much higher flowing 71mm compressor wheel. Comes with T25 style inlet flange.

Garrett GT3076R (aka GT30R aka GT3037)
Dual Ball Bearing GT30R Turbo assembly with T3 style housing with T3 inlet flange w/ 4 bolt style exit. T04E style compressor housing with 4.00 inlet and 2.00" outlet. Very Good response turbo for 4 Cyl applications. This turbo has a flow capacity of about 500HP. This turbo would be the same as HKS GT3037. The GT30R turbine housings with 4 bolt exit are made out of ductile Ni-Resist iron (has a nickel content of about 38%). This material is much better at withstanding high exhaust gas temperatures than regular cast iron.
 
#25 ·
Disco Potato -

Lol, anyway with the whole ball bearing turbos turbo lag is almost eliminated anyway. A sequential system is near pointless on our cars. And most of the supra owners think its pointless on their cars which is why we see alot of big single turbo supras.
 
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#26 ·
SSStang said:
Disco Potato -

Lol, anyway with the whole ball bearing turbos turbo lag is almost eliminated anyway. A sequential system is near pointless on our cars. And most of the supra owners think its pointless on their cars which is why we see alot of big single turbo supras.
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+1, but you know some kid is gonna go for the "unique route," even though we never see it.

The disc potato is a great little turbo. Quick spooling, and will run out of huff around 4500-5000 rpms(think about your stock redline). If you get it tuned properly you can get some big power out of it since it is rated for around 350hp. The thing I don't like is that it can run out of huff so quickly on larger engines.

Personally I'm a fan of t3/t4 57mm a/r turbos. They are quick spooling, and don't run out of huff as quickly, and are capable of making a lot of power. I view them as a more versitile turbo than the GT28RS. The GT28 series of turbos are great turbos, and are great starting points as well. Remember turbos can always be upgraded. It's about placement, and welding on a new flange.
 
#34 ·
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#38 ·
SSStang said:
Disco Potato -

Lol, anyway with the whole ball bearing turbos turbo lag is almost eliminated anyway. A sequential system is near pointless on our cars. And most of the supra owners think its pointless on their cars which is why we see alot of big single turbo supras.
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Him
 
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#39 ·
ByPopularDemand said:
SSStang said:
Disco Potato -

Lol, anyway with the whole ball bearing turbos turbo lag is almost eliminated anyway. A sequential system is near pointless on our cars. And most of the supra owners think its pointless on their cars which is why we see alot of big single turbo supras.
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Him
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He's not saying it cant be as effective, it's just not necessary to go through all that extra work when a single turbo can do the job just the same.
 
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#40 ·
I thought single large turbos had lag down low, and the sequential turbos had a small one to eliminate lag and it fed the bigger one for higher rpm power...feel free to correct me if im wrong though
 
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