Thread: Need some advice with tune!

I am at a stand still, have sunk tons of money into this P11 and it is just plain slow!

I will try to keep this as brief and descriptive as possible lol

the car: 99 infiniti G20T, I/H/E, Brian crower stage 2 cams, and a B14 ECU with calum basic daughterboard. (harness and evap lines done correctly)

For the current .bin, someone on here made a .bin for me with the 1m861 as a starting point and said he tuned it for P11 with cams and the P11 MAF. My 0-60 done by video is about 11 seconds! Now back when I got the car with just intake cams and exhaust it did roughly 8.2 nothing great lol but hey at least it wouldn't get pushed around by Hyundai's!

I am posting a youtube video below showing my AFR at idle, light driving, and heavy WOT driving. It idles at 16-17 which seems very lean to me, and on start up idle was in the high 12s and it stalled a lot and puffed out black smoke.

All sensors are good, timing is spot on 15 degrees, physical timing is perfect, everything torqued to spec. compression test had great results, and running 93. So I am hoping someone can hopefully shed some light on possible issues seeing the AFR. I am assuming it is something in the tune, because the ECU made it alittle slower, but then the cams and 2.5" mandrel cat back made it a lot slower. And yes I did pull the valve cover and get TDC and rechecked timing every way possible just to be sure!!

Here is the video:



NOTE: Not leaving wideband there, have not mounted it yet! And the vibration sound is the exhaust rubbing on the rear frame support. Will be fixed soon.

tune could use a little cleaning up but really isnt that far off for not being really tuned

do you have cam gears to adjust the bc2's decent turbo cams but not so sure how they are na without adjusting them

definitely need a good dyno tune on the car before anything can see a lot more than just looking at a wideband

A tighter tune will help, as stated above some Dyno time and tuning should be the answer. I think your real issue is you are expecting to much out of what you have. P11= heavy and even a well tuned 145hp de will not make it fast. Slap a small turbo on top of what you currently have and you will be happy.

I know what you mean by expecting too much, but it was much quicker with stock everything! The power decreased by literally 30whp with the ecu cams and exhaust. When I say slow, I mean embarrassingly slow. I understand a bolt on DE is a SLOW car but will still hang with some Hondas, right now I honestly don't think it would beat ANYTHING in a race lol

Look at it like this, after driving the g20.. And driving my girls bone stock 01 elantra, her car feels massively powerful compared to the g20 lol

than your ass dyno needs recalibration or something is messed up with your cam install

check your cam timing, the tune could be a little richer in areas, and overall clean up. also check your crank pullie and make sure it hash's slipped and reflecting incorrect timing

Mine loves 12.5 afrs

Is it just me or is that thing pretty damn lean wot. I'd be looking into your tps and make sure it's going up to the 4.xx volt during wot. Rather that our fuel pressure is low or plain and c simple, tune needs more fuel.

Also with the cam swap make sure cam timing isn't off a tooth. (Usually with a good idle its the exhaust cam that's off) and ignition timing.