Malpassi VS Sard VS Nismo

[Skyrine-Dave]

Can anyone give me information, pro and con's about these three different types of Fuel Pressure Regualtors?

Do they all do the same job as well as each other?

The nismo item looks like the stock reg, but with a screw on top, where as the malpassi and sard are more solid, robust units. Would this affect their performance?

I''m just a little confused with these products.

Cheers

Dave :headspin:

[krawler]

I queried between sard and malpassi at gavin woods and his response to malpassi involved some fairly heavy language which I possibly shouldnt repeat in polite company. It wasnt a positive response, put it that way.

I dont actually remember what brand he did reccomended over all, but I know sard was a name that cropped up as a "good" one.

[Russco]

malpassi suck, go Sard

[Skyrine-Dave]

ok thats a technical response slapper... but WHY??

is it because its not a jap brand... is it because it costs 1/3 the price of the Sard?

[krawler]

ok thats a technical response slapper... but WHY??

is it because its not a jap brand... is it because it costs 1/3 the price of the Sard?

Gavins reasoning (minus most of the more colourful words) was that the malpassi couldnt maintain its set pressure between full boost and idle, especially after a hard run then quick back off. You would see the malpassi holding full boost fuel reg pressure even at idle, or vice versa (ouch!)

Also the build quality was "shit" and "typical of italian crap" and "I wouldnt even throw one on at my worst enemy". ... Thats not entirely verbatim

[Skyrine-Dave]

lol nice.

well thats the sort of info i want. I do know that the malpassi's work as i've used one on a previous car with no drama's, but i just want to justify the $300 odd for a sard or nismo item.

Cheers krawler

[Zombie]

$300? my Nismo one cost ~$150

Adam

[Skyrine-Dave]

thats my other query.

The nismo's look like the stock fuel reg, but with a screw on top (the one i owned did anyway)

How do they go at controlling boost? are they rising rate etc? Their small design makes me abit wary of them...

[Zombie]

I couldnt tell you because mine is sitting in my wardrobe waiting to go on.

But i think there are some other people around here who use them.

Adam

[GTR-Ben]

Look at the nismo one that bolts on. It looks like stock.

All it does is restrict fuel on the return.. how can a different brand really have that much difference?

Skyline-Dave. How can it control boost..? And unless you running enough fuel for 4000HP I can see the small size hurting?

And I would say the Nismo one is all you need.. they have been proven to work. Rising Rate is not always a good thing.. you should use tuning to get the fuel right.

[Skyrine-Dave]

errm i dunno what i meant when i put controlling boost

i think i must have meant how do they go about conrtolling fuel whilst under boost.

[Bass Junky]

Why do you need a rising rate reg.

Whay don't you get a bigger pump insted?

[EnricoPalazzo]

nice thread guys, keep it up.

[Scooby]

Can anyone give me information, pro and con's about these three different types of Fuel Pressure Regualtors?

Do they all do the same job as well as each other?

The nismo item looks like the stock reg, but with a screw on top, where as the malpassi and sard are more solid, robust units. Would this affect their performance?

I''m just a little confused with these products.

Cheers

Dave  :headspin:

Dave;

I've heard only good things about SARD, and Nismo aren't known for making junk. That said, make sure you need one before you spend the $.

[Skyrine-Dave]

yeah i've got a bigger fuel pump, and injectors will be >660cc i have decided.

I want to make sure i am going to be completed protected on the fuel side of things. Hence asking all the questions. Alot of money is going into My RB30DET and the GT35R will be wound up in boost pressure.. so i want make sure i'll have adequete fueling.

[mokompri]

^rising pressure reg. are usually 'band aid' fixes people use to flow a little more then what there injectors can handle with normal fuel pressure... and as most band aid fixed its best to do the job proper and just get bigger injectors

ive also heard similar bad things about the malpassi, and have been recommended the sard over it, reason given was that the malpassi cant hold a steady fuel rail pressure, and well if that is the case, then its a pretty pathetic product really isnt it

[Bass Junky]

You can also push some more current through the pump to raise the static pressure....

I think.,

[mokompri]

yeah i've got a bigger fuel pump, and injectors will be >660cc i have decided.

I want to make sure i am going to be completed protected on the fuel side of things. Hence asking all the questions. Alot of money is going into My RB30DET and the GT35R will be wound up in boost pressure.. so i want make sure i'll have adequete fueling.

i recommend you not even go with the fuel regulator, run stock fuel pressure, and run bigger injectors if your running out of fuel, IMO, if your increasing fuel rail pressure to make up for lack of fuel, then your injectors are too close to 100% duty cycle anyways, and again in that case its a safer option to go with bigger injectors, if you want to be safe, which you say you do

pushing the injectors too hard will increase the chance of something going wrong, your spray patterns are also affected when you push the pressure too high

[EnricoPalazzo]

Im gettin 550cc injectors, big bosch pump, and also an adjustable FPR to wind abit more out of my injectors if need be.

[mokompri]

You can also push some more current through the pump to raise the static pressure....

I think.,

mmm i doubt it will, unless you have a shitty regulator, the pressure is simply a result of the restriction from the pressure regulator and it should accomodate for any extra flow and keep its pressure consistent, although its a common DIY trick to upgrade the wiring to your fuel pump, so you get less voltage drop + more current to the pump, which increases its FLOW, not pressure