jackson racing fmu adjusting


bumpit2001
10-07-2005, 06:43 PM
I just put a jackson racing supercharger on my 99 cx and i don't have instructions or anything on which way to turn the screw on the, fuel pressure regulator, for richer or leaner.

superbluecivicsi
10-07-2005, 07:26 PM
you cant adjust the rate. you cant change the fuel pressure on it. it is not a fpr. you can only change the rate at which it rises.

it is a 5:1 fmu.

for every psi of boost it sees your fuel pressure will rise by 5psi.

just keep it at its original position.

better yet ditch it and pick up hondata or uberdata.

bumpit2001
10-11-2005, 10:18 PM
what would be a good a good fuel pressure regulator thats not enging mang. but will do a good enough job for raising the pressure under boost

superbluecivicsi
10-12-2005, 05:14 AM
your oem fpr on the fmu is fine at stock boost levels. whatever you plan on buying in the future, pick up n engine management system. you will not regret it.

stefan525
11-08-2005, 11:30 AM
get rid of that fmu before you blow your car. get a real engine management. look into apex power fc and other stand alone ecu's.

superbluecivicsi
11-08-2005, 01:23 PM
get rid of that fmu before you blow your car. get a real engine management. look into apex power fc and other stand alone ecu's.

boosting at the stock levels or even with an fmu and water injection at higherboost levels will not blow your motor.

stefan525
11-09-2005, 12:11 AM
the FMU seen a certain ammount of boost and will give the car a certain ammount of fuel pressure.

depending on what injectors, fuel pump or fpr you have, that could be too much fuel or not enough.

what im saying, is that an FMU is NOT accurate, you have to get the car on a dyno, check air/fuel ratios and make sure that the car is not detonating.

superbluecivicsi
11-09-2005, 12:34 AM
what im saying, is that an FMU is NOT accurate, you have to get the car on a dyno, check air/fuel ratios and make sure that the car is not detonating.

we know that. its not that the fmu isnt accurate, its that it doesnt provide the right amount fuel and ignition timing acorss the table. especially the transition to boost, where you get that notorius tip in detonation the jrsc causes.

get rid of that fmu before you blow your car.

i was correcting this phrase. ive ran, tuned, and seen plenty of JRSCs run with just the JR FMU from 6psi - 12 psi some as long as 4 years on just the fmu and a few with water injection. as to it causing the motor to blow up..............well, that depends on alot of factors. i have not seen it yet. of course getting a proper engine management system will help the detonation problems plagued by the high intake temps produced by the jrsc's blower, the difference is like night and day.

Kuntry_Boi06
11-09-2005, 09:09 AM
why the fuck would you waste money on that shit?

Kuntry_Boi06
11-09-2005, 09:11 AM
oh and fmu? more waste of money... i would take that money and get a damn enigne swap...
just a suggestion or another suggestion
grab the rope find a tree and end it... research my friend before you make anymore retard decisions.

vesper
04-09-2006, 12:12 AM
oops

kris
04-09-2006, 09:53 AM
oh and fmu? more waste of money... i would take that money and get a damn enigne swap...
just a suggestion or another suggestion
grab the rope find a tree and end it... research my friend before you make anymore retard decisions.



Please tell me why a superchager is a retarded choice? You're one of those people that thinks D series is better than a B series, and here you are telling him to do a motor swap?

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