twin turbo J30

[Eswift]

theres a guy in the VG30DE/ VG30DETT forum that said he converted a J30 into a twin turbo. He posted that about a month ago, and i didnt see it until now. maybe he will reply...

interesting to see what he did with those pistons if he kept the NA block in there and just TT'ed it. sounds like detonation soup....

im interested to hear, in any case.

http://www.nissaninfiniticlub....12244

[Omar]

I have been thinking about the same thing. Another thing I was wondering was that wont it be easier to take the engine and replace it with the TT engine? Of course with other minor modifications, would this be a good idea?

[Sopdadope]

You're probably already aware of this, but that's A LOT of work...

On top of the already cramped engine compartment there's the issues of where to mount the two intercoolers... BIG $ unless you're a jack-of-all-trades fabricator.

[Eswift]

fitting the turbos is the biggest problem as the steering column goes right through where the driver side turbo would optimally reside.

intercoolers could easily fit in front of the front tires. the turn signals on either side of the grille could be removed and used as ducts. cuts should also be made on the wheel-well liner to allow un-interuppted airflow.

the corner lights could then serve as turn signals.

Unfortunatley, there are many other major modifications required to put a TT engine in. It would be easier to just convert the NA block, even if it had to be removed to change the pistons, cams and exhaust valves.

I see a supercharger as the most viable solution for the J30, but the AC would have to go...

[Omar_J30]

You know I was thinking about a post earlier saying that J's in Japan came with a 4.1L V8 engine. Now obviously its a bigger engine...so how did it fit in the bay? How much would it be to get the whole engine (thats if it fits into the bay)? I'm just curious. I would like to know what people did when they converted their J's to TT. I want to mod my J so bad.

Take care. Later...

[Eswift]

it fits with ease, the actual size is probably even smaller than the 3.0 because the 3.0 has a monsterous intake manifold.

you would need to make custom (S.S) exhaust manifolds.

You would need a front clip from a wrecked Q, including all AC stuff, ECU, harnesses, etc.. that could run anywhere between 1-4k (wihtout any of the TONS of labor that would go into it)

maybe we will hear more about this TT J30, im sure it can be done, and done well, but i have a feeling it may have been done poorly. (either poor performance, or poor reliability) The Zemulator changes these limitations now, but unless he had a complete MOTEC with HAL running, the engine was being harshly punished.

[madmax88]

why not put in a V8? that is what I am going to try to do!

[Eswift]

that is what I am going to try to do!

i have a feeling you are going to try and find someone to do it for you..rather than do it yourself. if its going to be just you, well good luck to ya. and thats the reason i don think its a very viable option. so many hours of labor, and a good amount of custom fabrication.

[Omar]

Hey Eswift, I remember you telling me that you were thinking about supercharging your J. Are you still thinking about it? How much would it cost? How much power would you gain? It sounds like a good idea. I would be interested too. The only downside is that I would have to get rid of the A/C.

[Eswift]

i am still in the process of figuring all the details out.

AC will need to be removed. Pricing will be at about $3000, (about the same as the stillen kit for the maxima) and the expected power output will be ~300-320 RWHP. It will most likely involve a powerdyne head unit, stock TT injectors, Zemulator ECU mapper, and some combination of an air/air FMIC or water injection. Reliability should be excellent. currently i am working out details of integrating the water injection system into the ECU. The water injection might not even be necessary with the intercooler, but it may actually prove to be a replacement for the less efficent intercooler all together. that is, if i can get this triggering sorted out.

an added plus is, if you ever buy a NA Z32, you will be able to bolt this same kit on and get the performance (plus some) of a stock TT.

[Q45tech]

8 psi is 6.6 x8= 52.8% less density less power required by supercharger less back off for higher static compression- reaching a net of 290-310 flywheel HP will be a challange for the NA J30 engine supercharged.Then the 22-18% [depending on TC slip speed] power train friction loss.

Wish somebody would try and see what they get

[Eswift]

340 rear wheel HP has been accomplished on the NA VG30DE block with stock TT turbos and intercoolers. 320 with a nice buffer to rule out any possibility of detonation. Its all in the correct fuel and timing mapping. I think with water injection triggered by the ECU, about 9psi yielding low 300s RWP would be very possible, and this is what i plan to do.

Will definitley need an exhaust pyrometer, good wideband A/F, and several hours on a dyno to get it right, but it sure is possible.

[Eswift]

dennis, thanks for the input, by the way. i have another post floating around somewhere that shows those dyno results i quoted...

[Eswift]

great writeup on water injection, intercooling, charge air..etc.

http://www.interex.co.uk/faq_printer.html