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Hey guys AEM has there new website up and it finally has some info about there new FPR's....they bolt onto the stock location and they will solve the flow restrictions of the stock regulator!!...I know they are more $$$...but I think it would work better than the stock FPR with the B&M setup??
http://www.aempower.com/fuel.htm
http://www.aempower.com/html/fuel5.jpg
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John
B18C1 powered Civic EX Coupe
'92 Civic VX Hatch...waiting for H22A
[This message has been edited by CivicR (edited September 13, 2000).]
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Nice!
Any idea how much they cost or who sells them?
Greg
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I think someone posted a groupbuy at the groupbuycenter on the AEM fuel products a little while ago...??
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John
B18C1 powered Civic EX Coupe
'92 Civic VX Hatch...waiting for H22A
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Hmm interesting.. From AEM web site, it says the fuel adjuster can go from the minimum of 20 psi..
Adjustable from 20 psi to maximum fuel pump capacity rating
I wonder if this unit can actually replace the combination of Stock Fuel Pressure Regulator + CommandFlow.
It seems this unit is so versatile that will make it much easier to dial down the fuel pressure if using the larger injectors.
The Cartech plus this unit is the way to go?
By all means, I am no pro in the fuel supply arena. Please correct me if I make any wrong assumptions or wrong information.
Thanks all.
Derek
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Derek: Your assumptions are correct.
With the OE FPR + B&M Commandflo, the lower limit of fuel pressure is determined by the fuel pump because the fuel outlet is small enough to be more restrictive than the FPR itself.
With aftermarket pumps, it can be impossible to get fuel pressures below 45psi or so. If the pump has a high flow rate, the lowest pressure achievable just increases. I've never seen pressures lower than 51psi on my car. (Walbro GSS-342)
The outlet on the FPR determines the lowest FP can go. Nothing the FPR spring/diaphram does can make pressure go lower than that.
When you add larger injectors into the mix, you need to get fuel pressure even lower to idle without being too rich.
The fact that the AEM FPR has interchangeable fuel outlets lets it work with high output pumps. You can put a larger outlet on to lower the lowest FP achieveable and return control of fuel pressure back to the FPR's spring/diaphram doohicky.
I'm 95% sure I'll be buying one of these. (Unless it's like $200!)
Greg
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It should do the job, but seriously, I wouldn't buy one for my application unless it was under $80 and somehow I don't think that's likely.
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rjaffey: Is that because you already have your custom "regulator bypass" mod? Would you recommend the unit for the rest of us who want to get rid of the stock regulator (just to lower fuel pressures)?
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I called AEM today. They gave me a distributor's phone number to call. The distributor told me they aren't available yet. He also said that he doubts that they will lower pressure more than a B&M modified stock one. I guess someone will have to buy one and see before I get my hopes up.
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Roughly $55 (less if I bothered to shop) + an hour's fabrication work doesn't add up to much over $80 as far as I'm concerned, especially if I enjoy the work.
But, Assuming the AEM regulator fits on the OE fuel rail or the JR adaptor (for those so equipped) without interfering with anything, it ought to work without much hassle, but YMMV. They're claiming it's suitable for 1000HP+ applications so it must flow a *lot* of fuel.
BTW, it retails for over $220.
[This message has been edited by rjaffey (edited September 14, 2000).]
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$220???
Ouch. Count me out.
Greg
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Holden...thats retail...it will probaly go for alot less...like I said there is a groupbuy going on right now for them....I would post the info on the groupbuy..but I cant get to the Groupbuycenter website...anybody know whats wrong with it??...Lundgren??
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John
B18C1 powered Civic EX Coupe
'92 Civic VX Hatch...waiting for H22A
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What about not having a regulator in there at all...just use the cartech to set the baseline NA pressure. I can't remember if anyone has tried this.
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Whats the problem with putting an AN tap at the end of the fuel rail, block off the orginal FPR mount, and use an SX/Paxton/etc... regulator? Am I missing something here (it has been a long day).
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Hey guys the AEM FPR is going for $160 at the groupbuycenter
http://www.groupbuycenter.com/buy.as...ad&row_id=1157
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John
B18C1 powered Civic EX Coupe
'92 Civic VX Hatch...waiting for H22A
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yeah Phil said he did this. he couldnt get his base pressure down with the B&M so he just tapped the rail (actually the JR adapter for the FPR I think) and ran a line straight to whatever FPR hes using.
dunno why nobody else is doing this.
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In regards to running w/o the OE FPR, I think JRCivic said that "on boost" performance would be fine, but that between 10" vac. and 0 vac, fuel pressure would rise later (closer to 0 vac.) and faster. This could make "tip-in" detonation problems worse.
I've heard of a few people doing this and have yet to hear any complaints though...
Maybe I'll try it. We'll see.
Greg
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too bad hes only listing the universal, not specific application one.... hmmm...
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Yep...
Tom
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'92 Civic Si H/B (D16Z6) w/JRSC @ 6psi, J&S Safeguard, Fields SFC, Slater CAI, DC 4-2-1 header, custom 2.5" B-pipe, Tenzo-R muffler, Cartech FMU, B&M CommandFlo FPR, a grindin' 2nd gear and a bunch of knock...
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I've run the cartech regulator without the OE regulator and relults were as follows-
Lowest pressure obtainable at idle:
w/ Walbro GS342 18-20psi
w/ OE Pump 10psi!!
It didn't seem to have any more tip in problem but you really just set the Cartech where you want it at 0 vac and it rises quickly and still reaches the requirements you set for under boost.
I got the idea from Jim when I couldn't get it to not throw a CE light at idle with my 380's.
Last I heard he was running like this with his 310 or 320's.
I used a block off "o"ring plate to hose barb I've had from some crappy replacement regulator I got from Landspeed when I got the Blower.
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Turismo: Aren't you using a PMS unit or something? Perhaps that let's you alter the fuel curve to make up for the lack of an OE FPR.
On another note, I just re-read Rafe's directions for his fuel bypass gizmo. Unfortunately, I don't have a drill press (which seems required), so paying $160 for the AEM regulator is probably the way I'll have to go if running without the OR FPR won't work right.
Greg
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Holden:
I am using the PMS but with the 380's it didn't need much "off boost" input even with this low of pressure due to the ammount the injectors were dumping in.
I could see that with 310's or similar size this may be too low but then again I'm not certain.
Heres a quote from Jim on an e-mail I got from him on this topic and his setup:
I am currently using NO OE regulator at all... only the Cartech with a
baseline static pressure of 34 psi. BTW, I am using Venom 320's in the
car. I am experiencing a small "Flat" spot under Mid to High throttle
input around the 4500 to 5000 mark... other than this, there seems to be
no negative effects. Since you have the ability to TUNE your
fuel/timing settings, I do not see any reason why you cannot resolve
this small obstacle.
The bottleneck in the OE fuel system IS the OE regulator... I have a
GSS-342 pump in my car and my minimum fuel pressures, with the Cartech
only, is 19 psi !!! I am currently adjusted to 22 psi at idle on
vaccuum. My peak pressure under full boost is only 44 psi.
Jim
Hope it helps.
