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What Parts Are Needed To Fit A Gt3071r/gt3076r Iw

darrinspencer
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darrinspencer Grand Master

darrinspencer

Posted
Posted

Looking at buying either a garrett Gt3071R IW or a GT3076R .82 IW with the genuine garrett rear housing (not the factory RB housing) to suit a Rb25det

A bit of searching shows I need a spacer plate, custom dump and oil and water lines.

So I have a few questions

1. What thickness spacer plate and bolt lengths. Is there only one size available

2. Can I use my current bell mouth dump pipe and cut the Rb flange off and make it fit the new 5 bolt garrett flange. Is the bell mouth big enough?

3. What will be needed for the intake side of the turbo. Compressor oulet elbow size 63mm? Will the stock intake suction pipe fit?

4. What length oil and water lines.

5. Anything else?

skylinecouple Experienced

skylinecouple

Posted
Posted (edited)

Definitely get a 20mm spacer to get good clearance for the comp cover. So obviously you will need 20mm longer bolts or studs.

Yes you can keep your bell mouth but will need to modify it a bit as I did to allow for the considerable size difference between the .82 and the standard turbo.I just welded a 3" pipe onto the flange for the turbine outlet then a 2" pipe for the waste gate and joined them together with a bit of grinding and cutting. Works a treat. What I'd like to do though is start with the 3 and 2" pipes then into 4" dump to cat.

You'll need a new suction pipe in 63mm or just get some 3" pipe in 90deg. and weld a couple of fittings on in 10mm and 19mm I think from memory. These are for the blow off and oil mist from valve cover. Then get a silicon connector for intake to AFM and intake to turbo.

Oil and water I used a piece of wire to cut to length and shape of hose and went to local brake guy to make up new lines and connectors. Or go to Pirtek but they will over charge you. Come to think of it, the water line was the original and I just bent to suit.

Don't forget 3" hose clamps and because of the 20mm spacer you will need 2 gaskets. Oh and the turbine inlet is different to the spacer size so prepare to grind the spacer to suit for best flow. Don't try to keep blow off return pipes in original position, cut old metal pipe from just above the exhaust manifold and this will make it easier to put new rubber hose on new fittings on the intake.

Hope this helps. Just do a search on 3071 or 3076 and should be heaps of advice. If you have the PFC or some other management plus injectors and cooler then go the 3076 as my 3071 is at the end of compressor flow at 264kws and I recently went for a drive in a same setup but 3076 and practically no lag difference but 278kws @ 16lbs versus my 264 @ 18lbs.

Edited by skylinecouple

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