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Little more complicated than that. I'd recommend genuine Garret turbos, but that depends on your budget.

All comes down to how much power he wants to make, on an RB20 a KKR430 would be good for about 400hp flat out, if he want's less than that, i'd suggest something like a GT3071.

Give us some info on the motor? I'm guessing RB20? Any other mods?

Little more complicated than that. I'd recommend genuine Garret turbos, but that depends on your budget.

All comes down to how much power he wants to make, on an RB20 a KKR430 would be good for about 400hp flat out, if he want's less than that, i'd suggest something like a GT3071.

Give us some info on the motor? I'm guessing RB20? Any other mods?

He has a Cefiro with an RB20DET. It was a boost controller and airpod. He wants a turbo that achieves full boost at around 5k rpm. Woud the KKR430 do this as the budget would not stretch far enough for a GT3071? Is the quality of a KKR430 ok considering its a chinese knock off.

Thanks

Yeah they are a Chinese knock off, but they aren't too bad. Try a Hypergear turbo. Garret bearings, Australian Service. There's a 60-something page thread of Hypergear testing and refining their turbos.

I don't know why your fella specifically wants a turbo that has mega lag and takes till 5k rpm to spool... Lag is a negative side product of a big turbo that makes HEAPS of power, and without the 'HEAPS' of power, it's shit to drive a car that takes untill 5k to make power.

http://digi-hardware.com/turbocharger.html

A Hypergear TR43 is about the same as a kkr430, but better quality :)

Full boost probably around 3500-4000 rpm depending on boost.

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