Went to the track tonight

[C-Kwik]

didnt do as good as i wanted. i really wanted to hit 13's which i know i can do. i had a prblem above 4500rpm the car would sputter.

Check your spark plug gap. Higher boost levels warrant a smaller gap to overcome the extra resistance. You may want to think about adding an ignition amplifier. so you don't have to run an extremely small gap.

Too large a gap will feel like you just hit a rev limiter.

[Structure240sx]

really? i thought that the stock ignition system was pretty strong. i was goin to upgrade with my built engine maybe ill try this out. what should i use a msd 6al box thing? i dont know much about ignition upgrading.

[NateDogg]

Try running .028" to .035". The boost will blow out the candle with a stock gap setting.

[Nismo_Freak]

i can hit 10psi without sputtereing its jsut at about 5000rpm when i notice it. the thing is my egt's are gettint oo high so its not running lean. and my engine is still strong i did a leakdown test on it and it didnt leak too mcuh. yea i want to order a tial today since i have a lil extra time and get a price on a hight stall torque converter. i think i will keept he auto til this engine blows then do the 5 spd swap with the built enigne im pickin up on saturday.

silvialuvr- yea im a freshman, what color is ur car i'll look for it next week. thats if we dont go to philly this weekend. hit me up on AIM: structure240sx

You have timing advanced too far above 5000 rpms.

Basically your getting detonation and the knock sensor is pulling timing, pull the timing below 20 degs. total advance on a turbocharged engine with a questionable spark plug gap and you get missing and sputtering.

Pull another 2 degrees of timing and raise your fuel pressure by about ~ 4 psi if you can.

Also, switch to a high grade spark plug like the NGK Iridium.

[Structure240sx]

yea it was the spark. i had the timing retared a couple degrees but it was blowin out the spark. i got 6 heat range ngks and gapped them to .035 which was still a lil too far but extremely better than it was. got rid of 90% of the sputtereing. that was the day tho it over boosted and blew a ring