TT vs. Single

Dzel

For the last year I have been all over the FI area of the site. And I'm finally ready for a kit! But which one, what are the pros and cons between going twin vs. a single other than price that is? Can you guys help me out?

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Trips

I can't take you're serious with that Avatar

But something to read if you haven't

Forced Induction for Noobs...

GaleForce

Single= less parts, easier install, same HP potential as TT.

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SS_Firehawk

Twins generally cost more, more labor intensive and not as efficient as a good single. They do spool faster, easier to package, and still make more power to kill the efficiency argument.

Seems like most single turbo kits are easier to install, cheaper to purchase, and have been able achieve full boost within 500-750 rpm of a twin system. For guys that have aftermarket exhausts, some may find it difficult to pair it up if it isn't Fast Intentions or Y pipe without a shop fabricating something up. There is a top mount kit, a mid mount kit, and then of course the STS rear mount turbo. The farther away the turbo, the longer the delay before the turbo is under pressure.

Some kits are more complete and easier to install than others, could save money in the long run.

Of course, superchargers, especially GTM's have been pretty impressive with the 370Z's, for anyone wishing to build power a bit more progressively.

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elperuano

+100000

With all the info out there.... Seriously???

Kingbaby

we've had this discussion before NEO

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Dzel

The plans are to run it on the drag strip definetly. I am looking for a low 60 ft. time. Looks like if I want to accomplish that I'm gonna need a single.

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Legz

Twin Turbo vs. Single Turbo V6: A Dissertation

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GTM TT G37x coupe! Stage2 8.5psi Hotchkis | GTSpec | Eibach | PLX | Exoticspeed

Boosted Performance

Just remember, that was written when the ST kits started to hit the market, by somebody that only sells TT kits.


With a single turbo kit, the key is a large turbine housing. If you are looking at a TT kit though, go with the new F.I kit. Those (unlike other TT manifolds) are built to flow.

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tower74

Oh god I remember that propaganda thread ....I found it ironic it came out the same time all the single turbo systems were being developed and starting to come on the market. Good read though and loads of info.

What it all boils down to is this...the amount you want to spend and what you are looking to get out of what you spend. Spend $10k on twins and get around 520hp...spwnd $8-9k and get around 520hp.

Dzel

Boosted has the best kit on the market IMO and has a direct line to my bank account. As soon as I give him the ok to start taking money that is. Lol

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chewy08753

Can't wait for him to get started on the next batch

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Mike@GTM

Yup, there's a reason we developed a TT kit...it's in the OP I wrote. The reason I wrote that is because I firmly believe that a TT kit for this application is a better solution. While you may disagree with my assessment, at no time have you ever contributed a serious rebuttal for the technical discussion. From a purely technical perspective, why do you think that a single turbo is a better solution?

I definitely agree with you on the bigger turbine housing for a single...the closer it is to the engine, the bigger it can be as well to get great response as well as top end.

As for your third sentence, do they outflow the GReddy manifolds they are facsimile of (minus the V-band flange)? Do you have flow numbers for all the TT manifolds to validate your claim?

SharpByCoop

Ummmm... Not so fast. The quickest VQ37VHR powered vehicle on the strip just so happens to be a fast spooling, daily driven, GTM twin turbo, old lady automatic, in a heavier car than the 370Z.

Just sayin'....

Coop

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Jim Cooper - (Retired: '08 Infiniti G37 Sport • TheShopCT built • 11.13 @ 123 mph (click for vid) • GTM Stage II Twin Turbo • 5-speed A/T Level Ten built • 591whp @17 lbs boost)

Boosted Performance

We can get techincal all you want, but in the end people look at the power output, so what is the point? Same goes for the power delivery, when comparing the twin scroll to the TT kit, I am sure you have seen the dyno. As for better/worse, at no point in this thread did I say TT is better than a ST kit. That is for the customers to research and make the decision based on what they want.




You can't possibly argue the fact that those F.I manifolds are as good as it gets without going equal length. Each one of the runners come together just before the turbine inlet, directing flow in one (towards the turbine) direction, and at no point does one exhaust pulse interfeer with the next (no "T" type merge). There is no need to get thechinical here either, it is rather obvious that these are very well built, and that a lot of engineering went in to them.

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