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I'm replacing the timing chain pre-tensioner
and will be cleaning up the intakes, fuel rails etc. at the same time. Any reason NOT to upgrade my '95 Duratec's fuel pressure regulator to the SVT one? Any performance increases on my 113K motor(will it run any better?)
Mark
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An FPR is an FPR is an FPR... Besides your fuel rail is different from an SVT's... Probably wouldn't even fit.
...and if it did. Why? Let me tell you why not...
No power gains to be had even if you installed an aftermarket adjustable FPR without the need for the extra fuel. Matter of fact you would lose power by making the engine run too rich. Worse case scenario you contaminate the oil with fuel and ruin the O2's and cat, maybe even bearings & rings...
Short Answer...
No.
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I agree with DemonSVT, but you may want to replace it with the same P/N. I did.
-Lance
Lance Kinley
CEG Webmaster
95SE, "Official CEG Beater"
Quaife, SVT parts, ST200 wheels, SS Y-pipe
I perceive you to be a stand-up, rational individual...
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Originally posted by DemonSVT:
An FPR is an FPR is an FPR... Besides your fuel rail is different from an SVT's... Probably wouldn't even fit.
...and if it did. Why? Let me tell you why not...
No power gains to be had even if you installed an aftermarket adjustable FPR without the need for the extra fuel. Matter of fact you would lose power by making the engine run too rich. Worse case scenario you contaminate the oil with fuel and ruin the O2's and cat, maybe even bearings & rings...
Short Answer...
No. Hate to burst your bubble but increasing fuel pressure will only increase flow which will confuse your computer, as it will have to adjust injector duration to maintain proper fuel flow and air fuel ratio. Demonsvt is right.
"careful man, there's a beverage here."
e-mail: boseraq@hotmail.com
aol IM: madhat1412
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I am going to agree with Lizzy on this one. Higher fuel pres can help in some instances. The computer will adjust itself if air/fuel gets out of tolerance. I honestly cannot see it hurting. It happens to be a litle trick the Mustang guys use to get a few extra ponies, jack up fuel pres, you then get more fuel in per opening of the injector (higher pres through the same size orifice equals more flow)
Just call me Judge.
People suck.
Life begins at 170mph...until that point it is just boring.....
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there is no point in wasting your money, to my knowledge, all applications of the Duratech (especially the SVT) run rich stock, and increasing fuel pressure won't help that in the slightest (quite the contrary is true actually)
While the computer may be able to compensate for the wrong FPR, it can only adjust so far, and the bottom line is, you don't need more fuel, so why spend the money on a new regulator ????(unless the old one is bad, or questionable)
Just because it fits, or even still runs w/ it, doesn't make it a worthwile modification.
It's all about balance.
bcphillips@peoplepc.com
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Originally posted by Judge:
I am going to agree with Lizzy on this one. Higher fuel pres can help in some instances. The computer will adjust itself if air/fuel gets out of tolerance. I honestly cannot see it hurting. It happens to be a litle trick the Mustang guys use to get a few extra ponies, jack up fuel pres, you then get more fuel in per opening of the injector (higher pres through the same size orifice equals more flow) Another plus to higher fuel press. is better atomization, which will help frovent fuel molecules from bunching up, and may also help reduce emissions. Both sides of this discussion are making sense, but after considdering it I understand that the there is no reason why the computer would not be able to or have trouble adjusting injector duration to compenstate for higher flow rates.
"careful man, there's a beverage here."
e-mail: boseraq@hotmail.com
aol IM: madhat1412
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btw, I do agree that there are times/applications for increased fuel pressure, but I really don't beleive this is one of them.
It's all about balance.
bcphillips@peoplepc.com
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Correct. This is definitely not one of those times... Making a car run even richer is not smart, not performance enhancing and not in the best interests of engine efficiency... N/A Engines make the best performance just this side of lean. (For safety reasons running like that would of course not be smart)
We are not taking about car engines in general here!!! This is a specific engine (which is notoriously rich to begin with) and a specific set of parameters and OBD-II will adjust slightly but to no great extent. (BTW at WOT the PCM bypasses most of the sensors anyway)
Elizabeth. If you got such a big increase by adding just an SVT FPR (not including any data if it was but ONE of many mods done at the same time! That data is not relevant!) Yours was bad to begin with... It's as simple as that...
Now if you are saying by adding the SVT upper intake, SVT TB and FPR you got a power increase... ummm... I hope so...
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My '95 has the EEC-IV, which is more forgiving about readjusting the computer. I plan on adding a supercharger in the future, but not immediately, and am trying to save some time and aggravation. No bubble here to burst, I'm replacing the regulator regardless, I'm just trying to do the upgrade now when I clean 113K worth of grunge off the intake, if the fuel rail issue is not a problem. I have already added the SVT exhaust, MAF, and airbox with a K&N filter. Any final thoughts on staying wth the same regulator or is NOW the time to do the upgrade?
Mark
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