Standard Pfc Or Djetro..?

[PX29]

Guys can anyone advise as to whether a standard PFC is sufficient for 300rwkw with standard internals or djetro required.?

What power figures require the djetro..?

I'd rather not get the djetro if not required as I've been told that it costs alot more to tune etc.

Its for a 32gtr.

Cheers,

Edited November 23, 2007 by PX29

[STATUS]

For most setups both tune the same and one takes no longer than the other, the std PFC is good for whatever AFm you choose to use. i tend to use the d-jetro for radically cammed engines as it actually tunes up quicker... generally speaking the std PFC will offer better fuel economy.

[bnr#@]

Why is that that the standard pfc gets better fuel economy? Have heard it heaps of times but have never realy got an explanation?

[PX29]

For most setups both tune the same and one takes no longer than the other, the std PFC is good for whatever AFm you choose to use. i tend to use the d-jetro for radically cammed engines as it actually tunes up quicker... generally speaking the std PFC will offer better fuel economy.

Thanks alot for the info about tuning(I thought standard comes with a base tune, where djetro had to be tuned from scratch.?).

So it really then depends whether I can achieve 300rwkw with standard AFM's......is this possible....or do I need Z32's...??

Edited November 23, 2007 by PX29

[Beer Baron]

well the Ljetro gets better economy as it runs MAFs instead of the twin map sensors on the Djetro version. they both come with base maps to start from. MAF sensors effectively measure air density/flow where as map sensors just measure pressure so under lots of condition the MAF sensor gives a finer reading.

they both cost the same to tune, but the big difference is the Djetro costs a lot more to install as you need to remove the plenum to fit the pressure feeds for the map sensors (unless you want to risk dropping swarf into the engine). the Ljetro of course is just plug in. BUT I would suggest that 300rwkw updraged MAF sensors is a good idea. either VG30s or Nismos etc. standard 26 Mafs will hit 5.115v at about 260rwkw. you can still tune a car with them to about 300rwkw or even more if you want, but it's much nicer to have a sensor that is still giving usable readings right to peak power/air flow.

[PX29]

well the Ljetro gets better economy as it runs MAFs instead of the twin map sensors on the Djetro version. they both come with base maps to start from. MAF sensors effectively measure air density/flow where as map sensors just measure pressure so under lots of condition the MAF sensor gives a finer reading.

they both cost the same to tune, but the big difference is the Djetro costs a lot more to install as you need to remove the plenum to fit the pressure feeds for the map sensors (unless you want to risk dropping swarf into the engine). the Ljetro of course is just plug in. BUT I would suggest that 300rwkw updraged MAF sensors is a good idea. either VG30s or Nismos etc. standard 26 Mafs will hit 5.115v at about 260rwkw. you can still tune a car with them to about 300rwkw or even more if you want, but it's much nicer to have a sensor that is still giving usable readings right to peak power/air flow.

Thanks for the response, very informative.

Bit confused with this Ljetro..?.....is this another name for the standard PFC...?,..cant seem to find it on the Nengun or Greenline webpages.

What would be the go then..... Standard, Djetro, Ljetro...?? Dont want to spend more than I need too..

Trying to determine which one is best suited for me.

Cheers,

Edited November 23, 2007 by PX29

[bnr#@]

Thanks Beer Baron

Ljetro is just the normal PFC

[PX29]

Thanks Beer Baron

Ljetro is just the normal PFC

Cool.

Been reading from the link below and there seems to be no real advantage going with the Djetro.

http://paulr33.sauvic.com.au/docs/powerfc-...erfc-faq.htm#61

Standard/Ljetro PCF seems to be the go-er at this stage. Anyone else want to enlighten me with their experiences or recommendations. I want to order a unit soon so I can start the 5-6week wait.

Cheers,

[Gav]

paulr33 suffers from MAPphobia

But in all seriousness, talk your tuner and discuss what he is most comfortable with.

I have seen Djetro installs on standard GT-Rs make power gains over the standard MAF version PFC without losing drivability.

[N I B]

Ive seen MAF make better power on GTRs with stock throttlebodys and found power with Djetros by finding ways of stopping the MAP pulse that they(And all other MAP ECUs)have,Mickos ex GTR is way down on power with its Djetro than it was with MAF PFC (400hp MAF 380hp Djetro) I spend much time Datalogging MAP signals and find good gains when we get a smooth input. 300KW is easy for MAF so you wont have to upgrade.

[PX29]

Thanks guys.

Tending towards the standard PFC at this stage, as its seems to be all I require and cheaper for inst etc..

Cheers,

[Beer Baron]

just clearing up there is no 'standard' power FC. the MAF sensor version is L-jetro (short for L jetronic), MAP version D-jetro.

[femno]

Sorry to hijack, but im looking at going d-jetro as well, and for me to sell the L and get a D is cheaper than buying AFMS for the L.

Ill need a new tune with the new engine package, and im going to make custom intake piping anyway whether if be for 80afm or no afm....

Whats best? Engine will be -5 equipped.

[Blue32]

I run the D-jetro on my RB26 - I find I have no dramas at all, runs well, was easy to tune, comes with a base map etc. Common misconception is that you have to remove the inlet manifold. I can confirm this is NOT the case - I have my MAP sensors connected via a T piece to a vacuum feed on the inlet manifold and it runs fine. Talking with the guys at Willal racing, this is exactly what they do and haven't found any differences over running it this way vs drill and tapping fittings into the runners.

Benefits on the d jetro - removing the AFM removes inlet restrictions, also there is obviously no need to upgrade your AFM's once you max them out so that saves you quite a conserable amount of $$.

Economy - I am still obtaining 400 - 430 kms per tank around town running 340 rwkws and have seen 500+ open road. I don't exactly drive it all that economically either - (what point is horsepower if you don't use it?)

I just figured that $$L Jetro + 2xAFMs + tune > Djetro + tune + sell AFMs (its a big difference, trust me)

If you have any questions let me know - happy to answer them.

Edited November 26, 2007 by Blue32