Jump to content
SAU Community

Recommended Posts

maybe the way the power delivery/rev limit? (engine design)

there must be a reason 2jzgte never been used in JGTC while rb26dett GTR win more than any other engine equiped car.

True, the RB is more of a rev-happy race engine, the 2JZ is a hi-po street engine, for a street driven car extra displacement is nice (hence the run on RB30 conv. atm).
  • Replies 6k
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

I've picked my self up a VG30DET BB turbo with plans to get it highflowed by gcg later on down the track. Anything over 250rwkw I'd be happy with. :(

For now I will be bolting it on with an adj. FPR (maybe injectors depends on $$) to see what she gets.

I'm expecting around 210rwkw peak some where around 5500rpm. ;)

Unfortunately I can't spend money on the highflow at the moment as I need to get the suspension and diff sorted.

The subframe bushes are nackered as is the diff, it now some times breaks out in to a single spinner when jumping on the gas in second, if it doesn't do that it breaks out in to a nasty axle tramp due to the stuffed subframe bushes. :(

do you know how much one is looking at to get a stock Skyline turbo high-flowed Joel?

My Neo turbo also has the plastic impeller - I wonder what the cost would be to change it to a steel one?

It comes down to you get what you pay for. As usual. :(

A cheap bush style highflow is around the 1k mark.

A BB core highflow is always up around 2k. GCG charge around $1900.

GCG are fairly well proven to highflow a turbo that is reliable and doesn't pop, I'll spend my money with them.

I could do the GT30/35 external gate thing but honestly big gates hanging out the engine bay really make me paranoid.

Sambo, Its making 175rwkw at 4400rpm then peaks up to 176rwkw (wow) by 4800rpm then drops to 176rwkw by 4950rpm then tails off to ~130rwkw or something by 6000rpm.

The stock rb20det turbo is waaay to small for the rb30.

It peaks to 12psi as soon as boost is made then quickly tails off to 9psi, this is on the stock actuator pressure. So the peak figure is made on 9psi, not too bad for a little rb20det turbo. ;)

The Rb20DET needed 15psi to make 164rwkw so it goes to show how much better the rb25 heads flow. :(

Guest
This topic is now closed to further replies.



  • Similar Content

  • Latest Posts

    • You are selling this? I have never bought something from marketplace...i dont know if i trust that enough. And the price is little bit "too" good...
    • https://www.facebook.com/share/19kSVAc4tc/?mibextid=wwXIfr
    • It would be well worth deciding where you want to go and what you care about. Reliability of everything in a 34 drops MASSIVELY above the 300kw mark. Keeping everything going great at beyond that value will cost ten times the $. Clutches become shit, gearboxes (and engines/bottom ends) become consumable, traction becomes crap. The good news is looking legalish/actually being legal is slighly under the 300kw mark. I would make the assumption you want to ditch the stock plenum too and want to go a front facing unit of some description due to the cross flow. Do the bends on a return flow hurt? Not really. A couple of bends do make a difference but not nearly as much in a forced induction situation. Add 1psi of boost to overcome it. Nobody has ever gone and done a track session monitoring IAT then done a different session on a different intercooler and monitored IAT to see the difference here. All of the benefits here are likely in the "My engine is a forged consumable that I drive once a year because it needs a rebuild every year which takes 9 months of the year to complete" territory. It would be well worth deciding where you want to go and what you care about with this car.
    • By "reverse flow", do you mean "return flow"? Being the IC having a return pipe back behind the bumper reo, or similar? If so... I am currently making ~250 rwkW on a Neo at ~17-18 psi. With a return flow. There's nothing to indicate that it is costing me a lot of power at this level, and I would be surprised if I could not push it harder. True, I have not measured pressure drop across it or IAT changes, but the car does not seem upset about it in any way. I won't be bothering to look into it unless it starts giving trouble or doesn't respond to boost increases when I next put it on the dyno. FWIW, it was tuned with the boost controller off, so achieving ~15-16 psi on the wastegate spring alone, and it is noticeably quicker with the boost controller on and yielding a couple of extra pounds. Hence why I think it is doing OK. So, no, I would not arbitrarily say that return flows are restrictive. Yes, they are certainly restrictive if you're aiming for higher power levels. But I also think that the happy place for a street car is <300 rwkW anyway, so I'm not going to be aiming for power levels that would require me to change the inlet pipework. My car looks very stock, even though everything is different. The turbo and inlet pipes all look stock and run in the stock locations, The airbox looks stock (apart from the inlet being opened up). The turbo looks stock, because it's in the stock location, is the stock housings and can't really be seen anyway. It makes enough power to be good to drive, but won't raise eyebrows if I ever f**k up enough for the cops to lift the bonnet.
    • There is a guy who said he can weld me piping without having to cut chassis, maybe I do that ? Or do I just go reverse flow but isn’t reverse flow very limited once again? 
×
×
  • Create New...