Purchased a highly built 240sx last season and i've noticed some significant breakup going into boost. Generally occurs around 1500-4000 rpm and then pulls insanely hard.
Car runs otherwise great, I also noticed the breakup does not occur in first gear.
I tried gapping the spark plugs (BKR7E) tighter to see if it would fix the issue with no success.
Unfortunately the one thing that the previous owner cheaped out on was the ECU. The car is running an AEM Series 1 (Yes yes I know, terribly outdated) but I was wondering if anyone had the background knowledge to give my tune a quick lookover. My previous car had a Link G4 which was insanely easy to work with and I can't seem to get any momentum with this older ECU.
Current engine mods are;
Eagle H Beam Rods
Timing Chain Tensioners
Supertech retainers & dual valve springs
LS Coil packs.. Couple other small things that the previous owner did not mention.
Car is currently tuned 380whp @ 17psi.
I am unable to find the dwell setting although was told these engines are unhappy with anything over 2, wondering if anyone could point me in the right direction as I was unable through a bunch of time last night to find anything resembling a dwell table.
Also a general checkover of the tune from anyone with experience would be amazing. The car was tuned by a shop but I'm not positive on the quality of work they put out.
Thank you guys so much!
@hfx240 on instagram if you want to check out the car any further.