GT 3071 : A direct bolt-on

[2XS]

Hey guys, just thought I'd let you know there is a mobb in the USA doing a couple of direct replacement turbos to suit the MPS.

ATP in the states is using GCG Trubos in Sydney as their Aus. supplier. Price is $2560 delivered. You can reuse all your factory manifolds and dump pipes too.

I'm getting one of these babies.



GT3071R Bolt On Turbo Kit for Mazdaspeed 3: atpturbo.com

[Nuliaj]

I'm pretty sure these have been out for at least a year now if not longer?

Mazda3Online :: ProtegeGarage :: MazdaRX8Online - Your Source for Mazda Performance
ATP GT3071R Bolt-On Garrett Turbo Upgrade MAZDASPEED6

[2XS]

Thanks, I asked and no-one knew anything about direct bolton turbos. Oh well. I do now, lol.

[Nuliaj]

I would also be careful of the 'direct bolt on' nature of these, as experience from people who have had them fitted in the US show they are anything but. Also unless you're considering porting the IWG, maybe consider welding it and getting a EWG.

[tricache]

How is that a direct bolt on! look at the size difference!!

[Nuliaj]

Direct bolt on in that it will bolt on to a stock exhaust manifold. The size of the turbo is different so a 3 or 4 intake will be needed, but the connecting parts are the same.

[MattMPS3]

I would also suggest a 'direct bolt on' forged rods & piston set to go with the turbo, and a tuning method Xede or standback, otherwise youll be hearing that crunchy grinding metal sound before long.

[EQ]

Turbo Australia in Darra also do them...nice and local

Jim

[Nuliaj]

With the forged pistons, there are choices of compression rates. I haven't quite wrapped my head around how compression rates work, anyone able to explain?

[2XS]

Direct bolt on in that it will bolt on to a stock exhaust manifold. The size of the turbo is different so a 3 or 4 intake will be needed, but the connecting parts are the same.

True, mostly after the bolt-on option for the factory exhaust manifold and intercooler connection and oil/water inlet/outlet.

I would also suggest a 'direct bolt on' forged rods & piston set to go with the turbo, and a tuning method Xede or standback, otherwise youll be hearing that crunchy grinding metal sound before long.

I will be getting the XEDE to go along with it too, thanks for the heads up though, but, pistons and rods won't be necessary imediately if its tuned right and I don't run 23psi boost, as they suggest.

Turbo Australia in Darra also do them...nice and local

Jim

Might give them a call, I like the idea of local.

With the forged pistons, there are choices of compression rates. I haven't quite wrapped my head around how compression rates work, anyone able to explain?

Not 100%, but,
Lower compression means you can run more boost and make more power, but in turn you loose so much more low down, whereas a higher compression ratio will create more low down power, but, will hinder the top end perfomance. Then you have to look into timing, fuel etc. to compensate for the different compression ratios. It all becomes very complicated very quickly. If you start changing comp. ratios, you have to be willing to spend the money in getting it working correctly together and tuned just right.

Hope this helps.