I think my SR running too rich!?

[crazyfast]

hey guys, I think my SR is runnin too rich.. cuz full tank of gas can only run 300km >< is it normal? wut do I have to check?

[boost_creep]

first id make sure your sensors are all to spec.maf,tps,and check your o2 to see if its even functioning.if those all check out.you could try switching to a fat type o2 sensor,that worked great for me.could also be coolant temp sensor.

[2_Liter_Turbo]

What do you have to do to convert to the fat O2 sensor from the skinny one off of a redtop? (besides the hole that it mounts in of course)

[boost_creep]

thats it.the plug is the same

[Dori Dori]

Check plugs and timing too. I'm at 580km on my one tank and still have probably 60km in her.

[Dori Dori]

Oh also, at one point my o-ring for the fuel pump/sending unit had cracked and gas fumes leaked out (never fluid)...I only got about 300km per tank when it was like that.

[2_Liter_Turbo]

thats it.the plug is the same

Nice (I have a greddy turbo elbow, so I can use either one)

What is the benifit from switching to the fat O2 sensor?

[Fenvy]

I'd liek to know as well

[boost_creep]

i think it reads more accurately

[I ask good questions]

If i am running a internally stock redtop with only a front mount and a three inch exhaust... approximately how many miles should i get from a single tank? Im only getting around 250-260?

[95lstegman]

If i am running a internally stock redtop with only a front mount and a three inch exhaust... approximately how many miles should i get from a single tank? Im only getting around 250-260?

i'm running stock boost getting 25.5mpg almost every time. lately i've been more aggressive on the highway and am seeing about 23.5mpg. please people, state miles per gallon, not miles per tank. i fill up at a quarter tank so as not to run the fuel pump dry too much.

also fuel economy depends a LOT [yes, that's two words] on driving style. i know some people getting 30-35mpg with their SR20DET's. these people seriously drive like absolute p******. this motor is designed so you don't have to piss off everybody on the road by being a fuel miser. go get a prius, sheesh. then you'll have an excuse for driving slower in a RWD turbo car than my grandmother in a corolla.

[I ask good questions]

I am getting around 18-20 mpg when driving easy and around 12-15 when driving hard. I just recently got the swap... now that all of the excitment has died down... i try to drive like a civilized human being and not drive the car to 7k rpms all the time. I just want to know what is around average.

[mallbor240SR]

could also be a bad fuel pressure regulator

[95lstegman]

could also be a bad fuel pressure regulator

i SINCERELY doubt it. check your fuel pressure. if it was running rich enough to cut fuel economy nearly in half, it would hardly run or not at all. i got 12mpg in my built Integra when a sensor went bad and the ECU was in the WOT map 90% of the time. it barely ran most of the time, too. felt like crap, had no power.

but you should do a tune-up if you're getting such bad fuel economy. new spark plugs, gap them properly, check your tire pressures, ignition timing, exhaust gas oxygen sensor, etc.

[johna_99_99]

i have a fat o2 sensor if u want one

[Dori Dori]

also fuel economy depends a LOT [yes, that's two words] on driving style. i know some people getting 30-35mpg with their SR20DET's. these people seriously drive like absolute p******. this motor is designed so you don't have to piss off everybody on the road by being a fuel miser. go get a prius, sheesh. then you'll have an excuse for driving slower in a RWD turbo car than my grandmother in a corolla.

Uhh, no. I drive pretty aggressively on the street and got 615km on my last TANK. I know this whole "per-tank" concept is difficult on you so I'll do the math for you. 615km = 382.2m The car took 12.5 gallons of fuel to fill the tank. That's an average of almost 31mpg.

[nv240fastback]

Uhh, no. I drive pretty aggressively on the street and got 615km on my last TANK. I know this whole "per-tank" concept is difficult on you so I'll do the math for you. 615km = 382.2m The car took 12.5 gallons of fuel to fill the tank. That's an average of almost 31mpg.

**** I wish I got 31mpg..I have a FP big28, 3" turbo back with fat 02 sensor, supra fuel pump, fmic, stock injectors and maf, safc2, and I drive quite modest usually and I only get like 300 miles out of a tank, but if im being an ******* it the needle drops pretty quick.

[Meantime]

I usually get 30 + mpg in mixed driving, or 350-400 miles to a tank. Stock T25, stock SMIC, Walbro, 3" BRM.

[95lstegman]

Uhh, no. I drive pretty aggressively on the street and got 615km on my last TANK. I know this whole "per-tank" concept is difficult on you so I'll do the math for you. 615km = 382.2m The car took 12.5 gallons of fuel to fill the tank. That's an average of almost 31mpg.

no need to be a smart-***. the reason i say "per-tank" is stupid is because some people fill it when it gets to E, some people realize that there is still more at that point and keep going, some people fill it when the idiot light comes on, etc. and then you have the problem of finding a reasonable gas station. the point is that you'll never fill up the same amount of gas twice. whereas with the miles per gallon approach, you have something solid that is very accurate and can then be compared to previous trips.

in any case, i'm running an E5 ECU with a stock redtop oxygen sensor that doesn't work in the first place. sounds like i need to go ahead and get the GReddy turbo outlet . . .

i almost don't want to get good gas mileage. then i won't have an excuse for taking my fiancee's car on all the long trips . . .

[Dori Dori]

I disagree. After refering to the people that can get good gas mileage on their SR's as "p******", I see good reason to be a smart ***.

For the record, Im currently running a stock t25, walbro, 11~14psi...my head is modified as well (blew a head gasket and decided to take advantage of it being off) with JWT C1 cams (with supporting mods).

[95lstegman]

how do you drive? maybe your cams make it that much more fun but i have to be making at least a couple psi in order to not feel like i'm driving a honda civic. some people don't mind that feeling but i like to make my body know for sure i'm driving my new toy.

BTW, how are those cams? as compared to stock at the same boost level, that is. i always figured i wouldn't bother putting cams on a stock valvetrain. just doesn't seem right. so if i'm getting an aftermarket valvetrain, why not get even larger cams to actually use the valvetrain's abilities?

[Dori Dori]

how do you drive? maybe your cams make it that much more fun but i have to be making at least a couple psi in order to not feel like i'm driving a honda civic. some people don't mind that feeling but i like to make my body know for sure i'm driving my new toy.

BTW, how are those cams? as compared to stock at the same boost level, that is. i always figured i wouldn't bother putting cams on a stock valvetrain. just doesn't seem right. so if i'm getting an aftermarket valvetrain, why not get even larger cams to actually use the valvetrain's abilities?

I always have to get on it in 1st b/c of my clutch. I'll wind out 2nd pretty hard too until I reach my desired speed (usually 10 over).

The cams ruined the powerband (to me) with a stock turbo/fuel/ecu. I think with a tune and some fuel (at the very least) things would be much better. I'm not even bothering though since i have basically everything to do my upgrade sans an intake manifold (can't decide if I want to fab my own or get a Greddy).

Oh, and these cams wouldn't work on a stock valvetrain. S1's and any of the S model cams will but C1's-3's are the "competition" level cams from JWT and require at least a spring upgrade (I got comp springs with crower retainers). C2's and 3's seemed like overkill to me (for my goals at least).

[95lstegman]

i know, that's what i meant about cams. if i'm going to bother getting cams, i won't keep the stock valvetrain no matter what cams i get. i like my cars to be bulletproof, so stock valvetrain + aftermarket cams isn't something i would do unless i was buying just S1 cams or something, in which case i'd save the money and buy a sack of poop instead. poop might be more fun than S1's, or any other stage 1 cam for any engine ever.

[Dori Dori]

I know what you mean...while the head was off I also replaced my valve guides, seals, and got a 3-angle valve job (should have just gone 5). I've never seen p&p do anything for an sr otherwise I would have done that too. Once the motor blows and I have to rebuild, I'll send the head back to the machine shop and get at least port match the manifolds.