Diamonds Posted September 26, 2011 Report Share Posted September 26, 2011 Apparently My car's FPR does not reference boost. How does it work? where is the port normallly? on top? I need to buy one tomorrow, I am going to go to jegs. Can anyone recommend on that is under 150 bucks? Quote Link to comment Share on other sites More sharing options...
Ef8sirJunkie Posted September 26, 2011 Report Share Posted September 26, 2011 aeromotive 13109 is the most common and works great. jegs price is $144 Quote Link to comment Share on other sites More sharing options...
Rotarded1647545491 Posted September 26, 2011 Report Share Posted September 26, 2011 aeromotive 13109 is the most common and works great. jegs price is $144 Thats the one we used on most of the FD builds, and I had one on my mine. How does it work? where is the port normallly? on top? I need to buy one tomorrow, I am going to go to jegs. Can anyone recommend on that is under 150 bucks? The FPR uses the boost pressure to increase the fuel pressure in a 1:1 ratio, meaning that for every pound of boost you increase fuel fressure by 1 PSI. The port comes out of the side in the form of a nipple: http://www.jegs.com/images/photos/0/027/027-13109_7.jpg Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted September 26, 2011 Report Share Posted September 26, 2011 Your FPR has a refrence...: http://i822.photobucket.com/albums/zz143/TransporterRaphy/240sx/IMG00111-20101020-1808.jpg Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 26, 2011 Author Report Share Posted September 26, 2011 I know it has a nipple... I think it only references vacuum... And/or does not have a rising rate. Read this product description... http://www.amazon.com/gp/aw/d/B000PVD7MM/ref=aw_d_detail?pd=1 It says it's absolutely not a rising rate... My guess is that some FPR'S have nipples for vacuum reference... But do not reference boost (kind of a luxury option if you will). Can anyone confirm this Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted September 26, 2011 Report Share Posted September 26, 2011 Unless theres some sort of valve in there or the air just pisses out the top I don't see how it couldn't be a RRFPR. I'm using a summit brand aeromotive copy and it works fine @ 50 psi base pressure, holds fine up to 72 under full boost. fuel lab is another good product also Quote Link to comment Share on other sites More sharing options...
99FLHRCI Posted September 26, 2011 Report Share Posted September 26, 2011 Are rising rate regulators only needed if you are running to small of injectors or higher boost or what? I have a similar FPR that senses vacuum but is not a rising rate. I am running a bigger pump and bigger injectors and my tuner never said anything. At what point or in what situation is a rising rate required? Quote Link to comment Share on other sites More sharing options...
mathc2003 Posted September 26, 2011 Report Share Posted September 26, 2011 a 1:1 boost reference only prevents the "effective" fuel pressure loss due to boost....in other words, if you run a static fuel pressure, each pound of boost "opposes" fuel pressure...trying to force fuel back into the injector. A true "rising rate" would be like a 2:1 that raises fuel pressure by 2 psi for every 1 psi of additional boost. Some older cars are set up for 1:1 out of the box. Old-school guys would use a 2:1 (or higher) to bandaid a lack of tuning ability for higher levels of boost. A cool thing about any of these regulators is that they run a lower fuel pressure at idle than in boost, so you can run a smaller injector for a given boost level and still potentially have a nice idle. Get on RC injector's website and do some calculations for your target HP to find the injector size you need....try different fuel pressures too. You can boost the fuel pressure up, yes, but properly sized injectors are the best bet...the fuel pump has a limit, after all. Keep in mind that other parts of the fuel system may become a restriction before the regulator/injectors do, depending on the vehicle. Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 26, 2011 Author Report Share Posted September 26, 2011 Unless theres some sort of valve in there or the air just pisses out the top I don't see how it couldn't be a RRFPR. I'm using a summit brand aeromotive copy and it works fine @ 50 psi base pressure, holds fine up to 72 under full boost. fuel lab is another good product also There must be.. .because my existing FPR has a nipple and it clearly states that it is not a rising rate unit... The big question is… Are there FPR’s with barb VAC nipples that only reference vacuum, and others that reference both? Or should that barbed nipple work for both VAC/Boost on every FPR….? IE - does a barbed nipple mean it references boost? Quote Link to comment Share on other sites More sharing options...
mathc2003 Posted September 26, 2011 Report Share Posted September 26, 2011 My best guess,(can't find a manual online), is that it's a 1:1 from my earlier logic. The reference allows it to hold the set pressure without the boost "dropoff" you would see in a returnless/static fuel system. Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 26, 2011 Author Report Share Posted September 26, 2011 i have never seen a 2:1 boost ref FPR... with my setup the main restrictor is going to be the turbo or the MAF. i am running a walbro 255, larger fuel filter, 550cc injectors, and big rail.... and at 8 psi and hitting 13.5 AFR... BUT, at idle its got about 45psi of fuel pressure. Today i will find out if the fuel PSI raises as i build boost when i connect the FP gauge in my car. Quote Link to comment Share on other sites More sharing options...
mathc2003 Posted September 26, 2011 Report Share Posted September 26, 2011 yeah, i think it's normally a 10:1 for those rising rates, i used 2:1 to make the math easier to explain. Post the results of your test in here, the DSM guys have been conflicted about whether this thing does the boost referenced 1:1, as well. http://www.dsmtuners.com/forums/bolt-tech/275686-megan-racing-fpr.html Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 26, 2011 Author Report Share Posted September 26, 2011 ^^^ CRAZY on the product description it clearly states that it is not a rising rate FPR. I BET, I BET, I BET, megan first introduced it 5 years ago as rising-rate... but after it didn't work... thye jsut (now) market it as non-rising.... hence why its in CAPS in their item description. From the description.... Product Features: - Polished - Professional installation is highly recommended. - Package comes with fuel line and vacuum line as well as adapters for most 2-Bolt applications. (May not fit your specific vehicle; however a machine shop can fabricate an adapter for your application.)- Universal Fitment with most Return-Type fuel systems.- Holds user-defined fuel pressure. (NOT A RISING-RATE REGULATOR) Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 26, 2011 Author Report Share Posted September 26, 2011 what is the difference between a regulator, bypass regulator, and a bypass regulator with a jet? basically, im looking at the quick fuel units.... http://www.quickfueltechnology.com/search?query=boost+regulator also, they all say "anodized top has a fitting for boost referenced applications"... does that mean that its set to go... or that i need other components to run a boost ref system? Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted September 26, 2011 Report Share Posted September 26, 2011 get this one. its what im running and works flawlessly, essentially an aeromotive knockoff http://www.summitracing.com/parts/SUM-220066/ Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 26, 2011 Author Report Share Posted September 26, 2011 I need one that's at jegs. Suggestions?! Quote Link to comment Share on other sites More sharing options...
NTHER91 Posted September 27, 2011 Report Share Posted September 27, 2011 Jets may have copied one see if the have a jegs brand one, call them 18003454545 http://www.jegs.com/i/Magnafuel/665/MP-9925-B/10002/-1 buy it Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted September 27, 2011 Report Share Posted September 27, 2011 http://www.jegs.com/i/Aeromotive/027/13109/10002/-1?parentProductId=750083 get the real deal if youre gonna spend $$ like that Quote Link to comment Share on other sites More sharing options...
Ef8sirJunkie Posted September 27, 2011 Report Share Posted September 27, 2011 No offense i think you need to diagnose your problem some more before throwing parts at it. Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 27, 2011 Author Report Share Posted September 27, 2011 http://www.jegs.com/i/Aeromotive/027/13109/10002/-1?parentProductId=750083 get the real deal if youre gonna spend $$ like that yep, bought that one tonight. to EF8SIRJunkie... I feel what you are saying. But i did discover that my FPR was not a rising rate unit... so that needed to be changed regardless. Quote Link to comment Share on other sites More sharing options...
DavidBaustert Posted September 27, 2011 Report Share Posted September 27, 2011 No offense i think you need to diagnose your problem some more before throwing parts at it. my thoughts exactly. i have a feeling the regulator will solve nothing Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 27, 2011 Author Report Share Posted September 27, 2011 my thoughts exactly. i have a feeling the regulator will solve nothing even after we established the point about it not being a boost ref FPR? fingers are crossed! Quote Link to comment Share on other sites More sharing options...
Ef8sirJunkie Posted September 27, 2011 Report Share Posted September 27, 2011 do you have a consult cable and Calumsult or nissan scan tech software? if not I do we could possibly get together this weekend and do a datalog and see what is going on. Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 27, 2011 Author Report Share Posted September 27, 2011 (edited) That would be amazing. Would u be willing to come to my garage. It's just south of German village. Wow, that's generous of you. What does the system tell us? Also, i will be at the shop tonight, Thursday, and Saturday (maybe sunday ifthats the only day you could make it). Or really any other day you could make it. Edited September 27, 2011 by Diamonds Quote Link to comment Share on other sites More sharing options...
Diamonds Posted September 30, 2011 Author Report Share Posted September 30, 2011 som the FPr seems to have fixed the problem... yet im not runnign a boost controller yet (took it off while chasing down problems). But, sicne the New FPR references boost it should not matter when i turn it up to 14 lbs. problem solved, for now. Quote Link to comment Share on other sites More sharing options...
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