a few pressure regulator and injector rail q's.

[Wildsupra]

hmm might look into the sards too then, malpassi's are cheap but ive heard mixed opinions, like unstable pressures??
Really dont like the idea of fuel leaking out the diaphram so that may be the icing on the cake as far as malpassi's go.

[thechuckster]

2nd hand sard (1:1) should be around the $200

malpassi has mixed reception - mostly to do with holding pressure at low flow rates (e.g. big pump and injectors at idle). Mine never leaked but i never had reason to pull it apart. Popular with the carbi crowd.

Am very happy with my used Sard FPR.

[Wildsupra]

Wanna sell me your used sard then? Seeing though your happy with it i would be too hehe
Hows 2hunge sound? i hear thats about their going rate

Does yours have a part number on it? Ive just found like 5 different sard reg's loks like they come in 5 sizes.....Normal type, RJ type and AN type in 2 models etc...none of em state rising rate, they all just say adjustable type.

[IN 05 NT]

one thing to look out for is CARBI LOW PRESSURE REGS and EFI high pressure regs....if you didnt know that already,

efi regs say....can take 80psi,
carby regs are made for 15psi....

blake

[Wildsupra]

yeah had that bit sorted already but cheers anyway.

[Norbie]

I know a few people who had Malpassi's and eventually gave up on them due to unstable fuel pressure. Never heard anything bad about a Sard though.

[thechuckster]

a- you dont need rising rate regulator - makes fueling in boost territory a PITA
b- adjustable is what you want - just get a guage and set it to 38psi with ECU off and fuel pump on.
c- no, i like my Sard where it's bolted thanks

just buy one like this.

Canned search for you.

[Wildsupra]

Hmm the reason i wanna go rising rate though is because im trying to squeeze out more power with the stock ecu using diffenrent size injectors. I figured with the rising rate i could start with a slightly lower fuel pressure (noot too low) then let the boost bring it up as i raise it higher and higher to try and find a happy medium between over fuelling and leaning out.
I realise its not exactly the best way to go about it, but im really not interested in going full ecu right now, and i have the car VERY close to where i want it with minimal serious mods other than turbo upgrade.
Ive got the gauge for fuel pressure so im sweet there.
More thoughts??
Cheers
Matty

[Forcefed6]

The difference with a Sard reg over a standard reg on most turbo engines, is the Sard has an adjustable base pressure. This means both are rising rate of 1:1, but you can raise the base pressure up, inturn raising the boosted fuel pressure as well.

For what you are describing above, it sounds like you might be better off with a 1.7:1 reg. Aeromotive as mentioned do one, but I will find out when I call my supplier this morning.

And in experience, I have found malpassi regs to be too inconsistant with there pressure, and they would vary vastly with engine bay temps.

[JustenGT8]

lets get some terminology sorted. 1:1 is NOT rising rate, the rate of fuel pressure increase to MAP stays constant. The is the most misused term out there. Virtually all factory fuel regs run 1:1 and is your aren't doing much by way of ECU mods just keep your stock reg and it'll do the job fine.

As the Chuckster says, rising rate (where the rate of fuel pressure rise increases more than the rate of MAP) is a bitch to tune. These are band aid regs from the days before tuneable ECUs.

Seeing you don't want to play with the ECU yet this might be your answer....just be aware that it's a bodge job and not ideal.

[Norbie]

just be aware that it's a bodge job and not ideal.

QFT

Also be aware that a rising rate FPR will push the fuel pressure up to silly levels if you're running a reasonable amount of boost so you'd best have a hardcore fuel system sorted. The factory pump certainly won't keep up.

IMO a better option would be an adjustable linear-rate FPR, bump the base pressure up a little bit to get more flow, then pull the AFR's back into line with something like an SAFC. This is the reasonable middle ground between "bodgy band-aid solution" and "proper full standalone".

[Wildsupra]

Cheers for clarifying that all up Justen, as you say if i buy a 1:1 the only advantage i will have over my stock reg is changing base pressure, which isnt going to really do what im trying to make it do i dont think.

As wot i want to try and achieve is running 2j injectors on my 1J and set the base pressure lower to avoid excessive overfuelling from idle, then use the rising rate to bring it up as it gets higher and higher on boost.
Hmm maybe a 1:1 using a lower base pressure would be sort of ok.....
Dam this is getting confusing. Might be a suck it and see kinda scenario.
As you say this is most certainly only a band aid solution, ideally i'd just go buy an ecu hehe

[Wildsupra]

i wouldnt bother goin with an safc.....its all or band aid hehe

And as for running silly pressures i'd be staring off with a lower pressure anyway, im not trying to squeeze the shite out my stocko's injectors.
What would you call stupid boost? Under 20psi isnt too stupid is it?
Say i had a 1.7:1 starting at a base pressure of 35psi (to try and combat overfuelling at idle using 2j injectors) the most pressure i'l run assuming i did hit 20psi boost would be 69psi
Whereas at the monet i think base pressure on stock reg is about 42, so at 1:1 with the stock reg i must be hitting 62 at 20 psi
Is an extra 7psi of fuel pressure extreme?

Cheers
Matty

[Norbie]

Lowering the base pressure to make 2JZ injectors work is a bad idea, it will screw up the spray pattern of the injectors.

A Microtech can be bought for a bit over a grand, which isn't a lot of money in the overall scheme of things. This will solve all your problems without any dodginess. Do it right the first time!

[Wildsupra]

Lowering the base pressure to make 2JZ injectors work is a bad idea, it will screw up the spray pattern of the injectors.

A Microtech can be bought for a bit over a grand, which isn't a lot of money in the overall scheme of things. This will solve all your problems without any dodginess. Do it right the first time!

Yeah i just bought a microtech and installed it on my rotor....$1100 all done i know.

The reason for not going a computer just yet is, my supra runs absoluely fukn sweetly with not a single hassle, and has done since the day i put the 1jz in it 4.5years ago. Even after every mod ive done its made good power without any hiccups, the only problem im running into and have been for a while but keep pushing it any way is lean AFR's. I dont want to disturb any thing else to do with ecu etc, just want a touch more fuel. I know of too many people who lose function when installing cheapish computers, either they have trouble starting, or they run like a pig when they are cold, or dont idle properly or whatever.
I realise this is not the case with everyone and is certainly overcomeable (if thats a word) but i dont want the hassles yet.

Just purchased a Sard reg to have a go and see wot i can achieve, also just purchased a wideband O2 sensor kit and digital gauge so i can monitor all my fuel pressure changes etc. Im not looking for major changes in regards to amounts of fuel, just enough to push my 1j that little further

Cheers
Matty