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Question for a technicla person should they see this...or maybe a research project for bored people

HKS 2835 with the .63 housing

Garrett GT30R with the .63 housing

What is the difference is spool up times going to be?

ill dig up some compressor & turbine maps :huh:

Based on that scientific advice I will thke the GT30 :huh:

Then run it at 20psi and see what I make!....apart from brown undies lol

i was just gonna ask how much boost u looking to run in it? Also wats ur rev limiter?

GT3071R-700382-3

Compressor -

IND - 53.1mm

EXD - 71.0mm

Trim - 56

A/R - 0.50

Turbine -

Wh Dia - 56.5mm

Trim 84

A/R - 0.64

HKS 2835

Compressor -

IND - 51.2mm

EXD - 71mm

Trim - 52

Housing - GT35

CFM - 608 MAX

Turbine -

Trim - GT28

EXD - 51.8mm

IND - 56.5mm

Flange - T25

Housing - 0.61 or 0.73

The HKS info was taken from this site: http://www.ztechz.net/id1.html

From that info id have to say the 2835 would be slighter better. Having a smaller comrpessor wheel aids in spooltime, but i dont know how the Trim affects things. Also given the fact that HKS turbo's are 'known' to perform better at their peak (read effiiency) id go for the 2835, thats if u dont mind spending 3k on a turbo :huh:. Also i dont know if that HKS info is actually 100% accurate, as the site it came from isnt a 'genuine hks site' so it could be out.

Also, i think the best way to go about choosing a new turbo, would be to have a power figure in mind, boost level u want to run, and then u can work out ur flow and then by looking at turbo maps (compressor & turbine) u can correctly choose the best turbo for ur application :huh:

Actually, bugger it, ill make a phone call and get some definate info, as i need to figure out what turbos i can run.

i was just gonna ask how much boost u looking to run in it? Also wats ur rev limiter?

20-25psi and lets be safe and say 8000

hey andy.....

i remembered you said somethin about not bein able to replace it till friday if we didnt do it the other night.

can come around tonight before i make my way to shanes????

You can come and pick it up tonight and swap it yourself and bring the black one back later? Cause I def wont be home tonight

Also, i think the best way to go about choosing a new turbo, would be to have a power figure in mind, boost level u want to run, and then u can work out ur flow and then by looking at turbo maps (compressor & turbine) u can correctly choose the best turbo for ur application :huh:

Actually, bugger it, ill make a phone call and get some definate info, as i need to figure out what turbos i can run.

20psi for about 260-280 rwkw Would be ideal I guess

That will be nearly at its limit if you get 280atrw.

it'd be past its 'limit' with a 20% drivetrain loss at 280rwkw. But it'd be good for 260rwkw. A turbo is best run at its 'peak' so u get the most out of it. I'd need to do some calcs and then look at some compressor maps, and i dont really have the time now. I'll have a play at lunch though.

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