S15 SR20DET MAF Causes power loss?

[MeanGreenS13]

well here isd the deal. Right now ive got an S13 Redtop SR with a GTI-R Pulsar T28 and an 8psi gate on sidemount.. and im geting beat by guys running 10psi on a T25 and front mount... and i dont mean by like a few feet.. i mean im getting beat BADLY!

a 28 on 8psi should EASILY hang with a 25 on 10... my car hasnt been right from day 1 anyway. we had to retard the timing something STUPID just to get it to keep it from falling on itself. IM wondering if it could be the S15 maf i have. I'm not tuned or anything if anyone knows or needs more info let me know. When im at idle. a dark grey smoke comes out (not oil but fuel) and it hiccups a little bit.

[WhiteKoukiS14]

well here isd the deal. Right now ive got an S13 Redtop SR with a GTI-R Pulsar T28 and an 8psi gate on sidemount.. and im geting beat by guys running 10psi on a T25 and front mount... and i dont mean by like a few feet.. i mean im getting beat BADLY!

a 28 on 8psi should EASILY hang with a 25 on 10... my car hasnt been right from day 1 anyway. we had to retard the timing something STUPID just to get it to keep it from falling on itself. IM wondering if it could be the S15 maf i have. I'm not tuned or anything if anyone knows or needs more info let me know. When im at idle. a dark grey smoke comes out (not oil but fuel) and it hiccups a little bit.

phil who told you that you have a s15 maf? look on the maf and write down the part number,and post it on here, i am running a s15 maf, but as far as i have heard they will only work on s14 and s15 engines. I think you are expecting too much from the t28, honestly. keep in mind the t25 on the s13 motors made 205hp, and t28 on the s14 only made 225, thats only 25 hp which is easily made up by an additional 3-5psi that cory is bosting, you need to figure out whats up with your timing, cause you being so retarded is the big reason for running so rich, which also could be the loss of power you feel. Also might want to invest in a Nismo fuel pressure regulator, i know i need one

[slow s13]

Ive read many times that the s14 cant use a s13 maf because its calibrated differently so I would assume the same for the s15 maf pn a s13 there just calibrated differently. If your maf connector has round style connector ends its probly a s15 maf.

[WhiteKoukiS14]

Ive read many times that the s14 cant use a s13 maf because its calibrated differently so I would assume the same for the s15 maf pn a s13 there just calibrated differently. If your maf connector has round style connector ends its probly a s15 maf.

you are correct s14 zenki and s14 kouki/s15 maf are the same but with different connectors, and i have heard that they wont run a s13 unless the ecu has been programed or a afc is used

[MeanGreenS13]

i dont really care about beating cory or jorge, or you for that matter lol but i know something is wrong with this car. and the fact that the MAF plug was way different from what anyone, EVEN MARK, has seen, really got me wondering. My headgasket is starting to leak and im throwing out gray smoke really bad at idle. It smells of oil but i could never really tell the difference lol ill have the part # later, i have to get back to work

[WhiteKoukiS14]

i dont really care about beating cory or jorge, or you for that matter lol but i know something is wrong with this car. and the fact that the MAF plug was way different from what anyone, EVEN MARK, has seen, really got me wondering. My headgasket is starting to leak and im throwing out gray smoke really bad at idle. It smells of oil but i could never really tell the difference lol ill have the part # later, i have to get back to work

where did you get the MAF from? if ur head gasket is leaking you should see more of a white smoke and the smell would be sweet like burning antifreeze, well i gotta work 2night but if you wanna come by my work after 9ish i could prob take a look at it. id like to see the maf that you are using we can compare it to mine, the s14 zenki plug is the same as the ka plug, and the s14 kouki\s15 maf plug is the paper clip style. or visa versa. cant remember off the top of my head.

[scottsnissan]

. My headgasket is starting to leak and im throwing out gray smoke really bad at idle. It smells of oil but i could never really tell the difference lol ill have the part # later, i have to get back to work

May not be ur head gasket.Running rich could cause the rings to wear out and slip a lil oil past.Aslo could be ur turbo thats causing the smoke.Mine would do the same at idol and not while driving execpt when i shift.So right there i knew that it was more than likly my turd blower.So i replaced it and not one drop of smoke anymore.Aslo had a big increase in power.Jus trying to help.

Before the swap i was loosing to a 13.9 car by about 3 cars.(eqauls 3 ths or so)Now at the track i run a 13.7 on stock boost with the new turd blower.

[MeanGreenS13]

didnt mention turbo is BRAND NEW rebuilt. i took a week to let it break in and now im just driving it normal. i dont know what to do im getting pissed to the point of nearly wanting to go back to DSM but that wont happen

[574-240sx]

I personally know that a S13 maf wont work on a S14. What voltage are you getting from the maf.

[Florida240sx]

Sorry to hear man.Workign on gettign a truck to come get that KA from you. Don't understand...Why is your timign so retarded?You have mark check it to see what your current timing is? Spark plug gap?Check all your grounds?Why is your HG leaking.Thought you rebuilt it about 2 months ago. Wish I knew more about the SR.

[WhiteKoukiS14]

alright phil your MAF is a s13, but its the S13 SR20DE MAF, now I dont know if running the sr20de MAF is like running a SOHC MAF but i would definately recommend gettin a S13 SR20DET MAF ASAP... its amazing what a little searching will do

[dsm007]

I bought the same MAF phil has from the same guy on ebay,same part number and everything,if it is the same calibration or whatever as a SOHC MAF then it is good for 7 lbs of boost for now,I have seen the SOHC MAF work fine on Charles Register's car like 5 years ago when he was just trying to get it to run on a tight budget.....one thing I have seen with other types of turbo cars(not going to say what kind on here) is when you run a 255 LPH fuel pump with a stock regulator that doesnt flow enough to make it back to the tank the car runs pig rich......a 190 LPH pump would help or a BOLTON fuel pressure regulator FLOWS enough and allows you to turn down the pressure back to stock and then you take advantage of the higher flow of the walbro 255 to get more fuel through stock 370's or bigger and fend off the dreaded fuel cut(most cars its at 14 psi in cold temperatures)......I still cant figure out although a calibrated MAF....we are not driving mustangs with an ECCS system that uses a system in which if you want to run bigger injectors you just swap the MAF's for a recalibrated one thats set up for 36 pound per hour injectors instead of the stock 19 pound per hour injectors,pop your supercharger on and drive/haul *** down the road....these are a hot wire type of MAF in which it heats the wire between 1 to 5 volts,the more volts that is required to keep the wire hot the more the ecu knows how to add fuel based upon the fuel tables that are programed in it....if this was the same type of case as a mustang then I could just drop in a s15 maf and 440 cc injectors and drive down the road...I guess I am kinda confused here,can anyone chime in who has run into this before?.........Levi

[johna_99_99]

i have a redtop and it was running great when i first got it..........it ran real good for about 2 weeks but now i know its not running properly(not as much power). does your car backfire everytime you shift? well mine is backfiring like crazy.....it never did when i first got it. when i first got it it wasnt running an 02 sensor but it was still running great for a while.....when it started to run bad i thought it was just the 02 sensor.....so i got the 300zx one....put it in......and the car is still running crazy rich and doesnt have close to as much power as before......let me know if changing the fuel pressure regulator fixed it i guess..........the only thing i dont understand is that it was runnig great at first.....but anyways hopefully we can both fix our problems......it sucks when u put 6 grand into a swap and the engine isnt running like it should......i shouldve just kept the ka.....it would prob. beat my car right now.

[MeanGreenS13]

7 lol im not runnning 7 levi lol im running 8 spiking at 10 haha full boost hits and im misfiring like mad. thank you chris for that info. I tried searching nico for S15 MAF but I never thought of searching for part numbers and matching them up. this is why im still the low man on the todem pole in the SR community. i am looking for an S13 SR20DET MAF as we speak and im also trying to buy a headgasket AND figure out how i can get my dump off to beat it in so my column stops rubbing. what w ****ing week! thanks guys!

MGS13 Phil

[WhiteKoukiS14]

7 lol im not runnning 7 levi lol im running 8 spiking at 10 haha full boost hits and im misfiring like mad. thank you chris for that info. I tried searching nico for S15 MAF but I never thought of searching for part numbers and matching them up. this is why im still the low man on the todem pole in the SR community. i am looking for an S13 SR20DET MAF as we speak and im also trying to buy a headgasket AND figure out how i can get my dump off to beat it in so my column stops rubbing. what w ****ing week! thanks guys!

MGS13 Phil

no prob man, like i said i dont know if the sohc maf and the sr20de maf will run the sr20det temporarily, they have different part numbers, im not sure if you have a head gasket issue, there are so many possiblities when it comes to smoke from the tailpipe, get the new maf, and then see how it runs, i would take it easy on the maf u have no cause i dont know if its gonna compinsate enough fuel for what u need, and that could cause u frying ur piston rings which could cause smoke.

[MeanGreenS13]

well the smoke is white. i confirmed that this morning at work when my boss looked at me and he said youve got a lifting head gasket dont you lol. gotta love working at a shop. im going to get the apexi 1.1mm gasket for 202 at option and i bought studs from mark. im really thinking about dipping into my 5k in the bank and building the bottom end while im at it. but im not sure if i can yet. i dont think i can get it till im 21

[Beemen550]

well the smoke is white. i confirmed that this morning at work when my boss looked at me and he said youve got a lifting head gasket dont you lol. gotta love working at a shop. im going to get the apexi 1.1mm gasket for 202 at option and i bought studs from mark. im really thinking about dipping into my 5k in the bank and building the bottom end while im at it. but im not sure if i can yet. i dont think i can get it till im 21

hey if u need a s13 sr20det mafs let me know i can hook with a good price?

[MeanGreenS13]

YES YES OMG YES PLEASE EMAIL ME!! lol [email protected]

[MeanGreenS13]

btw i find it interesting that mark made that assumpsion (sp) last night and it actually may true lol cudos to mark always ontop of his game :-)