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Tomei Arms M7655

OIR32

By OIR32,
in Engines & Forced Induction

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OIR32 Enthusiast

OIR32

Posted
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help!! ive just committed to buy some tomei arms m7655 turbs with ported stock manifolds and dumps, im running 14 psi high with a nismo cat back and m's intakes. has anyone fitted these to there stock 26, just read up they are laggy and not good for my motor..... ;( ... any advice????? thanks

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Serpandrew Rising Star

Serpandrew

Posted
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Have a read of this: http://www.skylinesaustralia.com/forums/topic/368988-tomei-arms-m7655-on-rb26/

Long story short: More expensive than the tried and tried again garrett bolt ons (comparison to -5's seems like mostly) except laggier.

Here's the dyno graph of that guys run:

IMG_0835-1.jpg

Serpandrew Rising Star

Serpandrew

Posted
Posted (edited)

How much power do you want and is this just for a street car? -7's might be a bit too small, they are the standard bnr34 n1 turbo. -9's would be better for an all rounder and still a decent upgrade.

-9's don't come with actuators standard though so you'd need to grab some with them, also a couple of the coolant fittings don't fit without modification so you can buy ones that fit for ~$70 extra.

Edited by Serpandrew
OIR32 Enthusiast

OIR32

Posted
  • Author
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How much power do you want and is this just for a street car? -7's might be a bit too small, -9's would be better for an all rounder.

yeah mate just a street car.... know idea really, my plans eventually is to do, dumps,front pipes,injectors,fuel pump,turbs, power fc.. it doesnt have to be 1000000hp but enough to blow away a v8 haha
Serpandrew Rising Star

Serpandrew

Posted
Posted

Why do you want to divert from turbos that have been tested and given good results multiple times to turbos you don't know anything about?

If it's a street car just get -9s and be done with it, almost everyone else will say the same thing :P

Serpandrew Rising Star

Serpandrew

Posted
Posted (edited)

No worries, you should have a read of the following thread btw: http://www.skylinesa...rett-gt2860-9s/

Has heaps of examples, tells you everything you need to know about these turbos and other similar options and why you shouldn't go for other turbos.

Yes it's a long thread, but you'll be fully educated and won't have second thoughts after buying them :)

Edited by Serpandrew
OIR32 Enthusiast

OIR32

Posted
  • Author
Posted

No worries, you should have a read of the following thread btw: http://www.skylinesa...rett-gt2860-9s/

Has heaps of examples, tells you everything you need to know about these turbos and other similar options and why you shouldn't go for other turbos.

Yes it's a long thread, but you'll be fully educated and won't have second thoughts after buying them :)

rido will do, thanks again.
Serpandrew Rising Star

Serpandrew

Posted
Posted (edited)

-5's are a bigger turbo, -7's are the smallest (~270-300atw?), then -9s a bit bigger (~310-330atw?), then -5s (~350-400atw) which will be laggy on a 2.6 and no good for street driving.

Don't quote me on the figures those are just estimates, for them you of course need all of the supporting mods. Have a read of that thread I linked you and it will answer all of your questions.

Stock turbos on any gtr (except the n1's) have ceramic wheels which can't take much boost, and they are fairly small anyway. All of the above are steel wheel and bigger turbos, they can take a fair amount of boost.

Just keep in mind that your engine is around or possibly even over 20 years old along with the turbos, those things have had a long life and you'd need to replace a lot to get a reliable and powerful result.

Edited by Serpandrew
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