I want to make my 2jz on stock twins faster!

[xzeror]

Its from a jdm supra not aristo 2jz.

Mods: usdm denso w/ 12v mod, hks cam gears, usdm cams, 3inch dp and exhaust, intake, fmic w/ 2.5 hot side and 3 cold.

I would like to get more power out of my stock twins but im afraid im not sure what to do. Most posts and articles are for usdm 2j's.

I thought i was hitting boost cut but then i realized its just the speed limiter around 115-120.

I do have a aem wideband and tru-boost controller but havent installed them yet. As of right now i love how the car pulls and with the 275/40 nitto 555r DR i can hook just fine as it is.

So i guess my question is what mods should I do next? How do i get rid of the limiter, and how can i up the boost some more perf to the max safe limit of 17psi? Single turbo is out of the question for now, as i want to run my twins till they blow.

Thanks in advance!

 

[hvyman]

Tune and more boost.

To get rid of speed cut disconnect the pink speed sensor wire from the ecu. You will get a check engine light when you go over but it will turn off when you cycle the key.

 

[DOUBL3 D]

Turn up the boost...the difference between my friends 2JZ car in 12psi vs 18.7psi is very noticeable.

 

[xzeror]

So with the truboost would I be able to up the boost safely and not hit fuel cut?Is it only possible to tune it with a piggy back or standalone, don't feel like dropping the money for either....yet. just want to get the most from my twin setup.

 

[hvyman]

Yes have to have some sort of tuning device.

Can safely boost to fuel cut at anytime. Did it on my 1j.

 

[xzeror]

Anyone have any experience with the tru boost on stock twins. Perf on a 2jz. Or know of a write up to install? Ill be going off the aem instructions but it would be awesome if there was a write up. How are the upgraded Ecus? Like the mines and blitz ones? (just wondering cuz they are kinda expensive and might as well go standalone for the price of one...)

 

[DOUBL3 D]

If you're going to get a new ecu you may as well go standalone but if staying on the stock twins you don't need it. My friend has his on 18.7psi and he's untuned (though he is a USDM 2JZ). As far as installing the truboost I thought there was a write up on SF somewhere

 

[xzeror]

Yeah standalone is the only thing I'd upgrade to. I'll look again on sf but if someone has the link I would appreciate it!

 

[SC61 MK3]

More boost, tune, cams...

Did you happen to race a wrx today? If so its a buddy of mine

 

[te72]

Can never go wrong with a good porting job. It may not give a whole lot of "extra" power, but you'll spool up sooner, and won't choke off on top quite as soon. Only downside is it can be an expensive mod, and you need to be choosy on who you have do it.

 

[DOUBL3 D]

For all practical purposes just get the Tru Boost wired up. You're still on the stock 440's correct?

 

[Jostar]

AEM tru boost=horrible boost controller..

 

[xzeror]

Im looking at getting some gsc 1 cams >.>. What is a "good" boost controller for a jdm 2jz on stock 440s?

Not sure if i did race a wrx that day o.0

 

[Radial]

Twins I don't know much about, but my old Twins where somehow difficult to stabilize in over-stock boost..... fluctuations in boost where big with my old Apexi EBC ID-ii, so big that one turbo got an heart-attack in the end. Went single after that.

So this is my 5 cents on a EBC fellas... works like a charm on my dual port WG in a small Single-setup....Rock steady boost-control.

http://jzxproject.com/bbs/index.php?showtopic=8650

 

[f00g00]

MBC, FCD, 550's with resistor pack, wideband to see whats going on. That is if your on a budget.

 

[xzeror]

Cant i hurt my engine by doing the fcd and 550s on the jdm ecu thats tuned for the 440s?

 

[SupraMedical68]

Cant i hurt my engine by doing the fcd and 550s on the jdm ecu thats tuned for the 440s?

Your ECU probably won't be able to compensate entirely as it tries to pull fuel, so you'll run rich. Shouldn't be a huge problem, but you'll want to have a AFC at least to pull fuel.