All Things Mk5 > Performance Modifications

How to tell if K03 or K04 turbo?

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Duke:
Hi guys,

How do you tell which turbo your Golf has?

Thanks

edd666999:
Gti = ko3

Edition 30 = ko4

Unless your car was modified before you bought it. In this case your dv will be located at the front of the engine bay if you have ko4.

Duke:
Thanks. I have a GTI however it gave exactly 230bhp on the rollers when I bought it, so wondered whether the turbo had been replaced and was running quicker than stock. I had it remapped about a year ago or so and it put it to 250 on the dot (same rollers). I have had the DV changed as it split but didn't do it myself so not sure where it was located.

RedRobin:
.
If it's a GTI it will have K03 - Unless changed by a previous owner.

If it's an Edition 30 it will have K04.

If still in doubt, check the plate on the turbo itself....

GrayMK5GTI:

--- Quote from: Duke on November 10, 2013, 08:29:59 pm ---Thanks. I have a GTI however it gave exactly 230bhp on the rollers when I bought it, so wondered whether the turbo had been replaced and was running quicker than stock. I had it remapped about a year ago or so and it put it to 250 on the dot (same rollers). I have had the DV changed as it split but didn't do it myself so not sure where it was located.

--- End quote ---

The K04 turbo wouldn't run well with the K03's ECU map so I doubt the turbo would have been swapped for a larger one. The car may have had an ECU remap on the stock turbo, or the car has some other hardware modifications, or the dyno was a bit optimistic.

Do you have a graph from the dyno run?

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