RS-adam

Hi guys

im building a 2,1zvh with all the right parts.. I was going for the GT3071 but I got a good offer on a GT3076..

what you reckon.. should I go for it?

BRAMMER

iTrader: (23)

what is your engine going to rev too??

RS-adam

7k is my plan...

Im bolting the turbo on a hansenturbo tubular manifold and im running a fieldmotorsport inlet.. so the flow should be okay..
the bloke im buying it off, told me the turbo came on boost at 3800 rpm, and it was on his alfa 145 1,8 liters engine

creator

i think simon at sitech racing has done alot with zvh's and these size turbo's he is probly the best man to speak to mate

bezo

what spec head and cam are you running?

JamesH

iTrader: (21)

I'd take the FMS inlet apart and have a look if I were you

RS-adam

Im going to order a Sitech efi head with newman cam and solid lifters.

james90rs: what do you mean mate

bezo

thats what i use

frayz

Depending on your CR on a 2ltr the 76 should be making a bar of boost by approx 4200rpm on a .82 housing.. Also depends on your power targets. Also what AR exhaust housing does the 76 have. You will be better off with the 63. for better spool.

RS-adam

my 2,1 is now 7,8:1 i CR but that will be lowered when i fit a sitech headlayer gasket..
I believe the th 76 have a 80. exhaust housing?

maybe I should stick with the 71 to get the real benefit of a ball bearing turbo.. the quicker spool..

12_Second_rst

iTrader: (1)

imo a 76r would be to big for a zvh and have fun getting it to rev to 7k

12_Second_rst

iTrader: (1)

also out of interest what sort of money is the 76r as i may be interested at the right price

frayz

7.8:1 is pretty low already Adam. You also need to decide where you will be using the car, ie road, track, strip etc.

If you want it for a road car the 76R will be pretty laggy on a 2.1. I personally wouldnt lower the CR anymore as that will make the driveability even worse. Just make sure you run good quality fuel, maybe add some methanol. Also make sure its mapped well.

A 3076R with a .82 housing is a genuine 500+bhp turbo, if youre not aiming for that then i would stick with the 3071R. The 71 will top out at approx 450bhp but obviously the spool will be better.

If i were you id decide what you want from the car and then spec a turbo to suit. Maybe a GT2871R will meet your needs?