Hey,
Just bought an FPR for my ecotec, however come to realize from the mechanic that what I have is not the correct one. For the ECO's, the FPR is attached to the fuel rail. The one I have is to be put between the fuel lines. One mechanic said it would make no difference if he even cut the fuel lines and added the FPR because the stock FPR would just bring the pressure back down. Another mechanic said it would WORK if put between the fuel lines. Not sure how an FPR works, so please help.
DO I SELL my FPR and get one made for the ECO? If so, guys please lead me in the right direction (web sites etc). OR do I get the thing INSTALLED?
Just don't like the fact that my metal fuel lines have to be cut for this thing to be installed. For one, I'd have to leave it in the car if I ever sold it.
Thanks for the help
"FRIENDS DON'T LET FRIENDS DRIVE STOCK"
You can always look at summitracing.com and look for an LT1 FPR. I have one on my truck, and it will fit eco's as well. That's if you don't want to cut the fuel lines.
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Quote:
DO I SELL my FPR and get one made for the ECO?
Sell it and buy an Apexi SAFC-2. I have it installed on my ECOTEC. It hooks up to your computer and pretty much tricks your computer into thinking you need more or less fuel in whatever RPM range. It's more detailed than an FPR. If you want, I can even give you the maping for whoever is installing it so they can do it correctly and not mess anything up. Last thing you want is a bad installation of something hooking straight up into your ECU.
If you do get, make sure they sauder the wires...the guy who installed mine didn't and the wires eventually started coming loose and it would turn off...threw me into limp mode on the highway...not a fun feeling. If you have more questions you can ask away.
Good luck to you.
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how much is that SAFC?
04 sunfire auto, mid 15's n/a, and still going
04eco (roy) wrote:how much is that SAFC?
around $240 on ebay.
i still think you will want an adjustable FPR to tune your fuel pressure down at idle
I was a retard, and now I'm permanently banned.
04eco (roy) wrote:how much is that SAFC?
Anywhere from $200-350 depending where you get it from.
I bought mine for $200 from my friend with a turbo hatchback who didn't need it anymore.
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Appreciate the replies guys.. Will look more into an SAFC and make a decision.
What if I had both the SAFC and the FPR?
Thanks again
"FRIENDS DON'T LET FRIENDS DRIVE STOCK"
Honestly, I think if anything your running rich and all you need to do is turn down the amount of fuel. Just one is neccessary.
www.kronosperformance.com / 732-742-8837
u have an 02, the lt1 regulator will not fit your rail, only for the 03+ guys
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NACHOTEC wrote:u have an 02, the lt1 regulator will not fit your rail, only for the 03+ guys
Good call...didn't even notice he had an 02.
Yeah so, importkiller, your better off getting the SAFC-2
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the computer doesn't control fuel pressure but controlls the injectors, i left a few good posts on this already. higher pressures will only lower the duty cycle of the injectors, so you really won't be injecting much more fuel, just injecting it faster. higher pressures are needed on boosted cars because of the increase in air pressure makes it harder to inject the fuel. that's about it. and those "in-line pressure regulators" are garbage, you could grab a pair of vice grips and pinch off return line with better results,lol.
CAR GODS MADE THE 1.6 SOHC TO MAKE US 2.2 OHV GUYS FEEL BETTER.
chapter10 wrote:the computer doesn't control fuel pressure but controlls the injectors, i left a few good posts on this already. higher pressures will only lower the duty cycle of the injectors, so you really won't be injecting much more fuel, just injecting it faster. higher pressures are needed on boosted cars because of the increase in air pressure makes it harder to inject the fuel. that's about it. and those "in-line pressure regulators" are garbage, you could grab a pair of vice grips and pinch off return line with better results,lol.
Exactly. You really only need higher pressure on boosted vehicles. More than likely you'll need less fuel from the injectors.
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the inline ones work the same as the on the rail ones....... and they work the same as a pair of vise grips on the return line........ except theres not vac. line on the vise grips......
The princible is to restrict the fuel comming out of the fuel rail, building pressure in the rail, and inlet line. All of those do that. Increasing your fuel pressure, affectivly make your injectors flow like larger injectors. While it doesnt change your fuel maps, it increases the flow rate of the injectors. The SAFC changes the duty cycle of the injectors, but they can only change so much. 100% is 100% (granted, injectors should never be ran at that).
not saying to use vise grips on your return line.
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If you increase the pressure on the injectors the computer will shorten the pulse width of the injectors (to a certain degree)
So would think it would be useless on a n/a motor. Simply because the computer will compensate for the rise in pressure.
My Car
^Fuel pressure is not computer controlled, it operates off of engine vacuum. Increasing the pressure on the injectors will not be read by the computer, the only way injector timing and pulse width will vary is by demand for more power from your right foot.
I didn't see that he had an 02, my bad.
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4.4 liters of S-10 and Cavalier pimpin'!
ok, i suppose you don't know anything about fuel trim. when the o2 sensor's voltage is read on a cruise the PCM can make changes in the fuel map. if you scan an ODB-II car and the trim is over +/- 2% something is usually wrong, sometimes it's water in the fuel tank, blown diaphram in the psi regulator, pinched fuel line exct.
Yes the pressure is controlled by vaccum, and guess what the vacuum at idle (17-21Hg) and the vacuum at WOT are vastly freakin different. if you use the "in line" garbage than your pressure will be constant say 55psi instead of a varying pressure like a rail mounted pressure regulator with a vacuum port would give you.
CAR GODS MADE THE 1.6 SOHC TO MAKE US 2.2 OHV GUYS FEEL BETTER.
Don't speculate unless you know me. I understand the reason why they install O2 sensors, that's not what we were talking about.
Maybe I just wasn't clear.
Vacuum is generated by the motor. I could care less how much vacuum it's making unless there is a serious problem with any of the vacuum operated accessories.
The pressure regulator I spoke of is a bolt on adjustable regulator, not some "in line garbage" regulator. It is a vacuum operated, 1:1 ratio regulator and it's adjust-ability range is from 30 psi to 65 psi fuel pressure. I have mine set at 35 psi idle and it rises to 45psi at WOT. of course I can adjust it to whatever pressure setting I want, but more fuel without more air is just a waste of gas.
It doesn't just fit on LT1's, but it will fit on the 2.2, 2200, and 03+ Eco's; Or so they say. I don't have any knowledge of the Eco, so I must leave that field to the Eco guru's.
Like I said, I didn't know that he has a 2002 with an Ecotec. I assumed it was the same. So I was wrong to speculate the interchangeability without research.
Please don't take this post as an attack or some smart@$$ post. I only state what I know and that wasn't enough...
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4.4 liters of S-10 and Cavalier pimpin'!
eh. don't beat yourself up over it. there are just so many victoms of misinformation. like high pressure make you car run rich (which is true on some early TBI, Bosch CIS, exct.) and the fabled backpressure = torque. yeah i love debating that one with my 50 year old shop manager. All i can say is to read reliable books, surprisingly some of the books written by old fella's on fuel injection are about as dated as a Holley 4 barrel.
You got the best pressure regulator there is, assuming you got the aeromotive unit. I ment no attack on my part either.
CAR GODS MADE THE 1.6 SOHC TO MAKE US 2.2 OHV GUYS FEEL BETTER.
Bigrey: I had a big speech typed up but my computer dumped it.
Yes I know that fpr are run off vacuum. and the increase in fuel pressure can be read indirectly by the o2 sensor. Also, it's tried and true (by myself) that if you increase fuel pressure at idle the computer turns the pw on the injectors shorter.
Oh and you probably have the accel fpr. correct?
Fyi chapter10: higher control pressure on a cis nets to a leaner mixture.
My Car
eh, it's been awhile since i read up on the kraut wagons, thanks for the update.
CAR GODS MADE THE 1.6 SOHC TO MAKE US 2.2 OHV GUYS FEEL BETTER.
Read all the posts, thanks again everyone.
I'm still a little confused, sorry! If I put in a ADJ FPR, will I see some results?
Or is it absolutely useless unless I have a turbo or supercharger?
I figured that I have some good bolt ons, and that since I have more air, I would need a little more fuel. I don't know how the ECU works and how it reads air/fuel. Understand a little from the above posts.
So, ADJ FPR a waste? OR will I get a few more ponies?
"FRIENDS DON'T LET FRIENDS DRIVE STOCK"
03_CF_Blues wrote:SAFC-2 would prolly be the best bet unless you are running boost correct?
Also safc should work well with nitrous too correct?
Well it's a fuel management system so you can set it to run a little rich and then when you do spray you will run pretty stoich. It can run good in any circumstance.
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im just going to swap to the 03 rail as its too hard to do this on an 02
1989 Turbo Trans Am #82, 2007 Cobalt SS G85
my exhaust pipe is super black. is this a sure sign that i am running rich? will a FPR or the SAFC-2 work to lean my mixture out a bit?
ECOSPEEDZ
