Trilogy Turbos Adjustable Fuel Pressure Regulator Install

[jisleyjr]

I was able to install my new fuel pressure regulator after work today.

 

Here are some photos:

 

Old one:

http://i131.photobucket.com/albums/p299/jisleyjr/fuel_pressure_regulator004.jpg

 

Just installed new one, the vacuum hose was too short, so i had to scavenge around for one.

http://i131.photobucket.com/albums/p299/jisleyjr/fuel_pressure_regulator006.jpg

 

Vacuum hooked up finally.

http://i131.photobucket.com/albums/p299/jisleyjr/fuel_pressure_regulator008.jpg

 

I wish i would have screwed the bolt in before mounting because the car wouldn't even start. After a couple minutes of turning the screw in the pressure started to rise. Got it to a 38lbs at idle.

http://i131.photobucket.com/albums/p299/jisleyjr/fuel_pressure_regulator010.jpg

http://i131.photobucket.com/albums/p299/jisleyjr/fuel_pressure_regulator009.jpg

 

I took it out for a drive and while boosting my pressure didn't rise more then a couple lbs. When i went WOT the pressure would drop. I did a couple pulls in 3rd and it seemed the pressure would spike, then settle back closer to 40lbs as rpm's rose.

http://i131.photobucket.com/albums/p299/jisleyjr/fuel_pressure_regulator011.jpg

 

The stock regulator wasn't raising the pressure 1lbs fuel per 1lbs boost so i am suspecting the stock fuel pump isn't up to it. I don't have anyway of testing the pump out, i'll have to wait until the weekend when a buddy is around.

[emagdnim]

Yea, something is defiantly wrong with the fuel system.

 

I wouldn't boost it until you get a new pump in the car.

[Trilogy Turbos]

Here is the list of all FPR shipped; starquest name or last name, city and date shipped.

 

SpEeD147; Cary;10/10/07

Sermeno;Elmont; 10/17/07

Garcia; farmingville; 10/17/07

Valenti;metairie; 10/17/07

Dragon 7606; Patterson; 10/17/07

whataride; freeland; 10/17/07

Extreme Industries; Calgary; 10/17/07

da Silva; Miami; 10/17/07

livesTSI; Stockbridge; 10/10/07

Sousa;Hicksville; 10/10/07

LaCourse;Westford;10/10/07

jisleyjr;Fargo;10/10/07

Dan87quest;Stratford;10/10/07

vinmaxesir;Broomfield;10/10/07

Daehnert;Glenbeulah;10/10/07

jetspd150;Sharpsburg;10/10/07

Rund;Woodland;10/10/07

Outcast Horizon; Benlomond; 10/10/07

Martell;Hopewell;10/10/07

Raschke; Saint Angelo; 10/10/07

D_Venable;Eaton;10/10/07

vmstsi;Williamsport;10/10/07

GCNTSI;Tallahassee; 10/10/07

busdriver;Jessup;10/10/07

PDX87Starion;Vancouver;10/10/07

John86TSi;Providence Forge;10/10/07

Rose;Rockville;10/10/07

Ortega;Fresno;10/10/07

Jonesh242;Los Angeles; 10/10/07

Castillo;Watsonville;10/10/07

86 Starion; Anaheim; 10/10/07

 

This is everyone I had listed that paid with Paypal and called me later with a credit card.

If I missed anyone please e-mail me back so I can look for your payment and ship the FPR. I don't think I've left anyone out.

Tks,

 

Heron

Trilogy Turbos

[PDX87Starion]

Yea, something is defiantly wrong with the fuel system.

 

I wouldn't boost it until you get a new pump in the car.

 

If you get more pressure when your tank is full, rather than empty, its most likely the fuel pump.

 

Nice pics and wright up.

[GCNTSi]

So has anyone else installed this? I installed mine the other day and it doesn't want to hold the baseline 36psi. It keeps falling back to 34psi, three times now I have adjusted it to 36 and it falls back to 34, close to 33 at idle.

 

Anyone else have this problem?

 

Thanks, GCNTSi.

[Xtreme Industries]

so far the results dont sound promising. has anyone else installed this yet, i was going to install mine but i dont want to take any chances of not having enough fuel pressure.

[jisleyjr]

Well my lack of pressure is something that i had before, so it isn't like this caused it.

 

Give it a try, only takes a few minutes to install.

[GeoffRomain]

Why don't you reference it from under the throttle body? Wouldn't that give the pressure regulator a better source of engine pressure? cause when the TB closes, you aren't getting as much vacuum.

[jisleyjr]

I hooked it up were the last one hooked up to. Never heard of a regulator being hooked up to under the throttle plate.

 

And welcome to SQC.

[mikec]

Why don't you reference it from under the throttle body? Wouldn't that give the pressure regulator a better source of engine pressure? cause when the TB closes, you aren't getting as much vacuum.

Fuel pressure regulators are supposed to maintain CONSTANT fuel pressure across the injectors: from injector's fuel inlet (where the regulator is) to the spray tip. So on a throttle-body style car, the regulator vac hose taps in above the throttle plates - that's where the injector tips are. On a multi-port setup, the regulator senses vacuum in the intake manifold since the injector tips are also in the intake manifold.

 

Injectors are designed to "atomize" the fuel at some specific pressure - and the "pressure" really is the difference between the pressure of the gas going into the injector minus the pressure at the injector's spray tip. If you go below that pressure you'll get less fuel flow and possibly a poor spray pattern too. If you go too far above that pressure, you might blow seals in the injector.

 

Imagine it this way:

 

40 psi fuel pressure ==> Injector ==> "chamber you spray fuel into"

 

If the "chamber you spray fuel into" is after the throttle plates, it'll see engine vacuum (and boost pressure on turbo/supercharged engines) so the net pressure across the injector will be changing constantly... so instead of running a constant 40psi input, the fuel pressure regulator monitors the "chamber pressure" and adjusts the 40psi to account for that as well. In an extreme case: say you had a 50psi turbo engine (race engine)... well, in that case if the fuel pressure stayed at only 40psi you'd end up with air flowing BACKWARDS through the injector, all the way back to the fuel tank! The fuel system would end up with 10psi air pressure instead of 40psi gas. Instead, with the regulator monitoring boost pressure, the supply pressure would go to 40psi + 50psi = 90psi total input pressure... fighting against 50psi air. The injector would still "see" only 40psi fuel pressure DIFFERENCE from inlet to outlet so you'd get the right fuel quantity and it would spray/atomize properly.

 

mike c.

[VICE]

I recently got a reg. from Heron along with 950cc 650cc injectors and I installed a Walbro 255 and I'm getting much better performance.

[jisleyjr]

I just finished installing a new walbro along with a new 3/8th inch fuel line. I now have 48 lbs of pressure at full boost. Can't wait to slap in the wideband and 1g translator and see what it can do.

[soulassasincc]

where do you get the sensor thingy for the fuel pressure guage? so that i can take the crappy on i got off.. and run one inside..

the one i have just screws into a elbow and i gotta read it under the hood.. its crap thou

i would like to do what you did and get whatever that is

and get a fuel pressure guage that i can run in my car..

[jisleyjr]

Hey, this is what i bought. http://store.summitracing.com/partdetail.a...mp;autoview=sku

 

Comes with the sending unit too. There is a thread out there about removing the brass plug and tapping that hole a little more. I think you'll need a 1/4" NPT tap.