Sleeper_MX5

for the expert which of turbo would you go with and what are the differences? which one is best for the miata motor?

Braineack

iTrader: (62)

needs more "what do i want from my miata" info.

keinayo

iTrader: (22)

Used both and my impression is that the GT25 spools faster, but the GT28 will give you more power in the end. I now have the GT25 and love it because it kicks in fast. As Scott said, a matetr of choice.

Saml01

iTrader: (9)

Depends on how badly you want to cut the factory outlet flange off and spend money or fabricate an inlet adapter.

hustler

iTrader: (6)

t88

levnubhin

iTrader: (30)

Wouldnt it also depend on which T25 or T28. Theres a difference between a T2554 and a T2560, no?
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paul

iTrader: (21)

wasn't the gt2560r called a GT28R for a while?

I run a completely custom gt2560r on my gutted auto-x/street car but decided to buy the BEGi S with 2554 for my daily driver. I have no intention of going to a turbo exhaust from my RB Duals or a custom manifold so I went with a turbo that should still spool quickly with those restrictions. I also only have power goals of 175-200 in mind for that car and should be able to achieve that safely with the MSPNP and 460's already installed & chinacooler from Scott. I'm hoping the spool of the 2554 on the BEGi mani and dp will be comparable to my 2560 setup on the other car.

gwilo

When I made my choice I took the GT2560 and added a 3" exhaust. It gives about the same spool up of the smaller GT 2554

wes65

iTrader: (7)

If you are wanting more than 240hp go with the gt2860rs.

Rafa

iTrader: (22)

Keinayo, from what RPMs do you start seeing boost with the GT25 and the same question for the GT28?

18psi

iTrader: (76)

great thread...i had the same question......one more for you guys: when you say quick spool or late spool, what rpm are we talkin about here?

Saml01

iTrader: (9)

Onset around 2500 and full spool at 3k is early. Onset at 3k and full spool at 4k is late.

edit: educated guess btw

18psi

iTrader: (76)

ok thats not too bad, its pretty good actually. anyone know where a td04 (from a wrx if you will) fits into that? im curious cause im planning on using that temporarily till i build an engine. ive seen dyno charts as high as 250whp on that turbo, anyone here using one?