rb25 gas mileage

[iilee]

okay i have a greddy intake mani, straight 3" exhaust, fmic, blitz filter, hks ssqv bov and im getting around 7 miles to the gallon. im wondering how much mpg u guys are getting out there cuz 7 is hella low. and i heard one guy gets like 24 miles per gallon on a rb. do u guys have the same problem?

[Kansei240sx]

As long as i stay out of boost i get around 24, but i rarely stay out of boost, so i have no idea.

[iilee]

daamn i dont even boost and i get 7 mpg

[BoostFab]

proper tuning get your best MPG out of the motor

[iilee]

its running factory tuned and facotry ecu

[BoostFab]

did u installed the high flow fuel pump and fuel pressure regulator (FPR)?

[iilee]

no FPR, you think that might be it doesnt seem like its running rich

[klh6686]

if you have a fuel pump other than a 240sx (which i hope you do) you need a fpr and a gauge to set the pressure right. you are probably running pig rich which the mileage show. i just got 26 mpg on my rb20 w/25 turbo on my last trip (13 gallons - 340 miles) that was highway driving ~95mph and some trips around town, and I have a heavy foot around town, so not really trying for gas mileage.

[cdorhout]

My best mpg is 25.

It didn't start out that way though, like you, my car ran super rich. FPR, and tuning my PowerFC to lean out the A/F ration to 14:7 at cruising speeds.I gotta pimp the FC Datalogit software again, it gained me over half a second in the quarter mile, and got my mpg up to 25.

[Shocker]

My best mpg is 25.

It didn't start out that way though, like you, my car ran super rich. FPR, and tuning my PowerFC to lean out the A/F ration to 14:7 at cruising speeds.I gotta pimp the FC Datalogit software again, it gained me over half a second in the quarter mile, and got my mpg up to 25.

cruising at 85-90MPH got me 360 miles to one tank. So around 25 ish mpg at that rate... any other time I could give two ****s about gas mileage.

[RBadam]

i get pretty good gas mileage in the city not sure what, no speedo, but on the highway i was getting 32+ mpg on a road trip, i got the pretty standard mods, fpr, fuel pump, intercooler, bc, ect

[NISMO_RB25]

I am running a little rich, but I usually see 22 to 26 on the RB25.

My RX-7 TII gets 11-13, with 550 primary and 720 secondary injectors, so if you are getting 7 on a stock RB you must be running really rich.

[iilee]

alright thanks for all the info

[iilee]

wat brand of fpr's did u guys use for the rb25det? wanted to double check does the nismo adjustable fpr work(ecr33)
Modified by iilee at 3:52 AM 12/5/2006