T2 Turbine AR question
Turbo Mini Forums

Hi,
What difference is there going to be between a 37 and a 48 AR exhaust housing with regards to spooling up? I'll be running a standard 1275 engine with 10spi. I'm not going any higher either!
I'm not looking for in depth, highly testicle answers 'cause they won't mean nowt to me
Cheers,
Gavin :)

Edited by Bat on 12th Nov, 2007.

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The 37 will spool up quicker.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Hi,
Guess I should have made the question a little more specific!
Would the 37 spool at 2k rpm and the 48 at 3K rpm?
Cheers,
Gavin :)

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the .48s are also used on landrover wolfs if you needed to find one
if you needed to know the standard actuators open at 1.5bar

i think the point at which it would spool up in the rev range is completly dependent on the engine and how fast it breaths, load on the engine etc

Edited by mini93 on 12th Nov, 2007.

David.

Hi,
I think that may be the problem with my question. Those who are running the 48 will have probably dropped the CR to get more boost in there....
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

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mine spools up and has half a bar of boost at around 2500-3000rpm. thats with a low CR. my engine loves boost

I know it's not a T2 but my turbo has a .47 turbine iirc (I should really know). And I get boost (the needle reeds boost on the gauge) from 3k. and Robert gets it a lot wower than this.

I suspect a T2 won't be quite as good as this.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

If you have a 1275 driving a T2 with the 0,35 it's about as close to a supercharger as you'll ever get. The 0.47 knocks a very small amount off the boost threshold - like 400rpm or so, but allows another 500 or so rpm at the top end - from my experience at least.

i dont think mine likes being pushed past 7k rpm. well at least i dont think it does!

it doesnt pull very well from there onwards but has loads lower down. thats why i struggled with a 3.9 and ended up hitting the limiter all the time.

Got some investigating to do this winter though but i would definately say that the .47/.48 (whatever it is!) is not laggy at all and is suited nicely to a 1275ish engine.

I think for me and using higher revs, i could get away with a bigger turbine to be honest. something i might play with if i get time to touch the car this winter!!