A long time coming, Rob's 4motion turbo build!

[WhO]

Would recommend going for a different set of brakes than the R32's unless you pick them up really cheap 2nd hand.

Already got a set at a pretty reasonable price so i'll see how they go!

WOW! That's what I'm talkin about! Did you source locally or OS? I'm wanting to do the same but hard to find others who had or are doing a turbo build. I take it the house is on hold?

A large component of the items i'm getting are being sourced from OS, both because of price and availability considerations. House is not on hold but progress is slower lol

You and me two haha, at least i can still be the first in WA i hope. I should talk to you two on how you planned and came up with what parts you needed. How much you guys looking to spend well whats the budget. Thats all thats stopping me at the moment is the dosh. Other than that looking good Wh0

Let me know if you want a breakdown of my costing too, just be warned whatever you think it'll cost, take that figure and add lots to it.

[WhO]

Got bored at work tonight so decided i'd do the maths and figure out how well a GT3076R will actually work with a VR6.




The three lines show the turbo's operation through 3200rpm-7000rpm at different levels of boost calculated according to desired crank hp.

Note figures are approximate however all looks pretty good to me, You can see that at 500hp at ~ 22-23psi @ 7000rpm the turbo will be slightly past the choke line not ideal but only just. At the bottom end around 3200rpm (peak torque on a n/a 24v vr6) the turbo is just past the surge line, not really a problem in this instance though as there's no way the compressor is too big! Although its probably a bit out of the ideal range for efficiency its not too bad and still acceptable.

@ 450hp ~ 19.5psi the turbo's sitting pretty with the line nearly smack bang in the peak efficiency range and @ 400hp ~ 16psi the turbo is pretty much at peak efficiency. Good considering my base line boost will be 15-16psi with me running up to 22 for when i feel the need for speed!

All the hp numbers are crank figures so can be expected to be less at the wheels and as with all things they are really only estimates thus i wouldn't be surprised if real world figures varied greatly, who knows, maybe even up to 20%. Only time will tell! At least by punching out these rough numbers i've been able to satisfy myself that my turbo choice for what i'm after is pretty much ideal