Changing Garrett Turbo Hotside to KKK 4 bolt

[Jamo]

In order to save time I decided to change the hot side housing on my GT3076r turbo so that it has the 2.5 inch 4 bolt housing the same as the KKK turbo

Here is the original Garrett outlet with 4 bolt 3" outlet

[Jamo]

Side by side shots of the original housing vs the 2.5" 4 bolt housing



The back of the hotside is different but all bolt spacing are the same.

[Jamo]

Taking the hotside off is a doodle. Slacken off the 6 bolts in a diagonal pattern, you will need to remove the oil inlet and outlet flanges and rotate the housing to remove the bolts.

I took a picture showing the original postion of the collars

[Jamo]

Put the turbo on a flat surface and slowly remove the housing and you have one turbo as it leaves the garret factory! ( for those that don't know garrett sell their turbos without the hotside and it is added depending on your requirements )

[Jamo]

Refitting is the reverse of removal and you should be left with a KKK downpipe compliant turbo.



I need to get to Sal's to take a pic with a downpipe, coming soon.

[Rusty]

Nice work mr. Jamo what will the performance difference be? One looks a little smaller exit than t'other.

[Jamo]

Should be no difference, I initialy thought there might be a performance difference but there shouldn't be.

Both housings output are actually 2.5" initially on the turbine blades, the GT turbo then tapers from 2.5" to 3" on the hotside outlet itself.

This taper will be done on the S2 downpipe instead with the smaller 4 bolt hotside.

[Ross]

Nice write-up. I have a good 3" dowpipe sat on the passeneger seat of my Avant, that would fit that beast very well. It's got your name on it

Cheers
Ross

[terrybullwon]

More likey to be less as the kkk flange will be moe restrictive.

[Jamo]

More likey to be less as the kkk flange will be moe restrictive.

The hotside inlet is a T3 flange not KKK.

The output is made for KKK flange but as the downpipe tapers it will be the same as the original hotside as at the base of the outlet of both hotsides they are both 2.5 inch

[Jamo]

Nice write-up. I have a good 3" dowpipe sat on the passeneger seat of my Avant, that would fit that beast very well. It's got your name on it

Cheers
Ross

Cheers Ross, hopefully getting the cat work done in next 2 weeks

[GazzaG60]

do you not need to have it rebalanced after that?

[Jamo]

do you not need to have it rebalanced after that?

No it's not a KKK turbo, they need rebalancing Garretts gt do not.

As said Garretts are sold without the hotside housing balanced from the factory.

The hotside is an option on purchasing the turbo kit to the customers need.

[Bram]

Next time I will choose a V-band hot-side for easier dismantling of the downpipe. Why again did you choose this 4-bold flange Jamo, jsut to be able to fit a certain downpipe you do not want to rework or something?

[Jamo]

Yes two reasons

a) Directly bolts onto my current exhaust

b) Directly bolts onto my new exhaust.

If I was having an exhaust from new as was originally planned I'd keep the original hotside or better still go for the V-Band

This thread is to show you can have the best of both worlds, the T3 flange and the stock exhaust setup.