1990 240sx ka24det daily drifter
Posted: Sat Feb 26, 2011 8:50 pm
ok so its not 100 percent running yet im having an issue with revving past 4800 and was hoping someone on here could be of some help but here is my setup
1990 240sx chassis
j64 diypnp ecu
1991 ka24de engine
stock single coil ignition system
aem 24+1 trigger wheel
550cc subaru sti injectors
walbro 255lph fuel pump
stock fpr
aem uego wideband
engine mods
bored.040 over with wiseco forged pistons 9.1:1 comp ratio
eagle h beam rods
arp head and main studs
full system ballance
isis rs3871 turbo
koyo dual core alluminium radiator
fmic
anyways here is my problem i took it to mac autosport to have it tuned today and got the motor running real nice starts up good, real good afr's all the way up to 4800 rpms where is hits a wall, it seems like a definite rev spark/fuel cut rev limiter the engine acts exactly as a 2 step launch control would no matter what everytime exactly between 4800 and 4900 rpm it goes strong all the way up to that point and then starts shooting fireballs etc etc flat out wont do anything more as far as settings go launch control is off rev limit is at 6600 soft cut 6800 hard cut neither my tuner or i can figure out what the heck is going on with this thing any suggestions? if need be i can upload my tune and some composite logs etc if you have any questions that may help you to help me feel free to ask away
1990 240sx chassis
j64 diypnp ecu
1991 ka24de engine
stock single coil ignition system
aem 24+1 trigger wheel
550cc subaru sti injectors
walbro 255lph fuel pump
stock fpr
aem uego wideband
engine mods
bored.040 over with wiseco forged pistons 9.1:1 comp ratio
eagle h beam rods
arp head and main studs
full system ballance
isis rs3871 turbo
koyo dual core alluminium radiator
fmic
anyways here is my problem i took it to mac autosport to have it tuned today and got the motor running real nice starts up good, real good afr's all the way up to 4800 rpms where is hits a wall, it seems like a definite rev spark/fuel cut rev limiter the engine acts exactly as a 2 step launch control would no matter what everytime exactly between 4800 and 4900 rpm it goes strong all the way up to that point and then starts shooting fireballs etc etc flat out wont do anything more as far as settings go launch control is off rev limit is at 6600 soft cut 6800 hard cut neither my tuner or i can figure out what the heck is going on with this thing any suggestions? if need be i can upload my tune and some composite logs etc if you have any questions that may help you to help me feel free to ask away