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Old 01-08-2014, 03:50 PM   #9
Racecobra
 
Join Date: Dec 2013
Location: Austria
Age: 41
Posts: 6
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Racecobra is an unknown quantity at this point
KA

Thanks All for your response!

I realize, that I have to upgrade the injectors.

Quote:
Originally Posted by PoorMans180SX View Post
Just to be clear here, the GTX line doesn't really spool faster than their GT brothers, they are just more "efficient".
I always thought, that the main advantage is spooling performance. Because if I compare the compressor map of the GTX3071R and the GT3071R, both have 77% peak efficiency. Yes, the GTX has a wider range with high efficiency.
http://www.turbobygarrett.com/turbob...R_803712_1.pdf
http://www.turbobygarrett.com/turbob...00382-3_20.pdf
Thanks, for the hint.

Quote:
Originally Posted by Scott@FontanaNissan View Post
Personally I'd Recommend
JWT Fuel Rail
ID1000cc injectors
Tomei FPR
DocRace Twin Scroll T3 Manifold
GTX3071R with .82 A/R divided Housing.
Full 3" Exhausts.
Turbosmart Comp40 Wastegate.
I have installed a large AEM fuel regulator and two bosch 300l/h fuel pumps, each has its own filter.

So I think I don't need the tomei FPR.

I can't find a docrace twinscroll manifold for the KA24DE, but fullrace offers one: Nissan KA24DE Twin Scroll Turbo Manifold - Full-Race.com

I have some questions regaring twinscroll:
1. Are there internal gated twinscroll turbine housings available?
2. My understanding is that twinscroll seperates the exhaust pulses to optimized flow and spoolup. But if I use just one wastegate, the exhaust pulse are not separated any more. Will this weaken the positive twinnscroll effect? I have also seen twinnscroll setups (on RB25 engines) with two external wastegates. (this will become expensive, because I have to change the manifold and add two external wastegates, dumppipes, etc)

Regarding Camshafts, so you think the 276° crower camshafts decrease spooling performance because of the large valve-overlap and the bad filling at low rpm? Hmm, I changed the cams last year and they helped a lot achieve the 370whp (yes response is peaky). I will think about this interesting argument. Which JWT cams would you recommend?

Thanks a lot, your inputs help me a lot!

BR Matthias
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