*****Fast Intentions "Twin Turbo Kit" is here*****

LukasC

Awesome Tony! Looks very promising! And those are good goals and numbers especially on relatively low boost!

BlkNismo

What size oil cooler is this car running?

tower74

Just wow is all I can say. It might be another year before I dip my toes back into the FI pond but this kit makes me want to dive in head first and say f×ck it!!! Very nice sir

ZMan8

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2010 370Z 40 Anniv., 6 MT | Fast Intentions | Swift Springs | SPC | Z1Motorsports | JWM | Redline Oils | 35% Window Tint
2015 Mazda6 | 370ZChicago: Chicago Area Cars & Coffee

F.I. Inc.

We currently have the Setrab 25 row on the car.

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enkei2k

I'm curious why you decided to use a GT28RS vs GT2871/GT2876? It has been out for so long now and there are better (although slightly more expensive) alternatives available.

Seems like most TT kits (GTM also for example) use the disco potato, but I just don't get why.

Is it possible to use those instead?

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...need boost...

Seb@SZ

They are using a much more superior turbo than the normal 2871R. The 2871R is actually not a "great" turbo. The compressor wheel to turbine wheel size difference on the 2871R introduces a very inefficient weak spot on that turbo that will make it laggier and not as responsive. It has too much back pressure as well which is death to any turbocharged motor. If your going to use a 71 wheel you want to step up to a 3071 that uses a larger turbine wheel.

The FI kit uses a much much much better turbo using the new Garrett GTX compressor wheel.

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G37sHKS

GTX ftmfw!

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edub370

question answer

Lower cost is a big driving factor when making fi kits for the masses as well

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FPenvy

if i'm reading this correctly the test car has the stage 4 setup? just curious since it's only made just under 500whp so far with 7.5psi i'm interested in seeing how much they gain with higher boost. other stage 2's have made 550WHP at 9-12psi so if this is stage 4 im waiting to see the end results.

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Scribe

You have to not think in terms of "stages" as there is no hard and fast conventions for what it corresponds with. That term has stuck and is pretty much the least informative marketing speak. It's supposed to be a shortcut for indicating a difference between two products that are similar. You can't use it to compare across anything other than a single product line and it doesn't mean anything between manufacturers or even between two product lines of the same manufacturer.

Stage one for one company might be stage four for another. For example, as a manufacturer I can have a stage one coffee mug (guess what I'm drinking) and a stage two coffee mug. What does that tell you? Nothing. It could be the capacity, the thermal properties, or even the addition of a "World's Greatest Jackass" logo. Now assume another coffee mug maker says they have a stage seven coffee mug. What does that mean? Does it mean that it's better than my stage two mug? Does it have a missile launcher? Who knows. Okay, now say that I (still making coffee mugs) now make a stage one and two water bottle... still tells you nothing.

It's better to think of these things in terms of their actual properties. In the case of turbo kits, it's things like the CFM and spool properties of the turbochargers. Yeah, it requires being more informed on what all those numbers mean and how to read a compressor map, but it's the only way to really differentiate these things.

Oh and to answer your question, the exhaust has a huge part to do with their results. Look at the difference between the power achieved by any kit with the stock versus a full 3" exhaust. It's massive (usually the difference between 475-550whp setups) because turbos work off of a pressure differential.There are other things to consider as well, beyond just initial power numbers on a choked system with no boost controller.

ironhide

All I gotta say is this man knows his stuff

FPenvy

i was more or less showing curiosity in what these snails can produce when they are turned up a bit and with the 3" exhaust added. i understand the marketing lingo with differences from company to company.

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler

Scribe

I apologize for expanding my original response while you were typing.

To answer your question then, the GT28RS has done well in single, small displacement setups (1.8-2.2L setups putting down 330whp). Thinking of the 370Z as two 1.85L 3 cylinder engines, you could roughly project that you could get much more out of two GT28RS. There are other factors to consider that would prevent you from cranking up the boost and maxing out these turbos.

That said, these turbos are probably the best match for the 370Z engine without diving into the internals of the VQ37. You don't need a bigger turbo because you can't up the boost (compression too high) and you can't make more power (connecting rods).

enkei2k

Yes, I understand that the GTX is better, but they're using that for the upper stage TT kits, I was more questioning the 'stage 1' kit, since that's what I will most likely be getting in the future. Thank you for your response though, learn something new every day

I suppose, but it's a small difference (~$100 or so) between the two. I guess the GT28RS would be better for DD purposes compared to the 2871 anyway.

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