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Comp map shows peak efficiency around 22-24psi, which is roughly target boost. 

Oh and I should have clarified, 9kw less, but now has cams, so would have been more if it still had the stock cams in it. 

The point was that hopefully the cartridge is still be decent if it's spinning well enough to support that power. 

Anyway, the purpose of the thread was to help me determine what the lack of power and response was, thanks to all who provided suggestions and assistance, we know now the issue and will get it sorted :) Looking forward to having it running well again. 

 

21 minutes ago, ActionDan said:

 

Able to diagnose a turbo failure without seeing it/the car/knowing the rest of the setup etc? 

Where were you when I was chasing the issues that lead me to pulling it down and finding the problem. I could have used your magical diagnostic powers lol ;D

 

You're the 1 who has said your turbo has failed not me? 

Im telling you why and i can almost guarantee Its just the usual problem. 

Compressor maps dont mean a thing. Looked at the new maps garrett supply now? 

They incorporate TURBINES into the equation and give you a compressor flow based on turbine selection.... Gee I wonder why they did That???

 

 

11 hours ago, Kinkstaah said:

Other than stealthiness there's really no reason to buy more twins nowadays. If you buy two new twins, you could buy a single + manifold/fab to fit that for the same money.

Obviously cheaper if you replace it by buying one single, but then again the real savings are in known good second hand turbos ;)

Still curious how a turbo can fail causing only a 9kw loss though? Maybe just detune the thing to 300kw and drive it around for awhile.


New set of -5s are $2500, a Borgwarner EFR is $2600 minimum, $1300 for a manifold and then your intake piping, exhaust piping, lines and fittings... Not even slightly the same money.

My two cents is, you've bought ANOTHER set of second hand turbos after your first set of second hand turbos failed? Not a great idea... Rebuild your original ones or go a single would be your most reliable options.

Also, your car would be faster with stock cams in it.

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