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So I've now got to decide weather to keep the low mount twins and change them to a gtx 2863or 67's from gtrs's

Or

Go to a single turbo setup, now my question is what kind of turbo should I use for my single application, I want response not just a peak power but I'd like to make around 500+kw with around 30psi. Also what size waste gate would I use? What brand of manifold would I use?

My car is a r32 gtr

My motor is a forged 26/30, the head has 280deg cams with 10.5 lift , 1 mm over sized valves, inlets and exhaust ported.

The compression is 10.1

Cheers!

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A 6466 would do 500 with ease, no reason to go to the bigger comp wheel and push the curve further to the right.

I believe JEM did a 2.6 / 6466 engine and spat out 603 at 35 psi.... IIRC. Big dollar engine however.

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EFR = Engineered For Race

Had a turbonetics GTK850 on my 2.8L, dam thing hit really hard around 4500rpm and made 760hp on an engine dyno at 26psi on 98 with 10% meth. But think they are probably a bit old tech now, compared to something like the EFR's.

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So I've now got to decide weather to keep the low mount twins and change them to a gtx 2863or 67's from gtrs's

Or

Go to a single turbo setup, now my question is what kind of turbo should I use for my single application, I want response not just a peak power but I'd like to make around 500+kw with around 30psi. Also what size waste gate would I use? What brand of manifold would I use?

My car is a r32 gtr

My motor is a forged 26/30, the head has 280deg cams with 10.5 lift , 1 mm over sized valves, inlets and exhaust ported.

The compression is 10.1

Cheers!

Hope you built a gearbox too :whistling:

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This sort of comes around to the same question....

....what do want 500rwkw for? and if you really want 500rwkw then it's not going to be anywhere near responsive.

I know 500 is the new 400 which was the new 300 in the 90's.

If your looking for a quick street car, especially something you can punt hard up the west coast, then start thinking 350rwkw max.... a responsive 350rwkw gtr will be faster almost everywhere that a 500rwkw GTR! then by the time the 500rwkw GTR starts becoming faster, your well and truly over any speed limit in Tas.

My suggestion is to have a think about what you want to use your GTR for, then whatever your choice, build the car for it... not just the engine and be happy with the comprimise.

You'll never find a turbo combo that is responsive enough or produce enough power...

...just build something that puts a smile on your dial!

Cheers

J.

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500kw is the target I'd just like to achieve. No real reason as to why, as for the gearbox I no she won't last long at all but that can come after my motor is finished. My main concern is turbo choice atm, I was thinking the gtx 2863 or 67's would be a good power/ response setup for twins. As for a single setup I've got no idea what do, my car put a smile on my dial before I started my new engine :) because I've done the extra work I want to change my turbos, plus reading up about the gtrs's has really change my mind about them becsuse everyone says the rubbish. So I'd like to upgrade I just don't no what to tho

Cheers pete

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