DA-MAX

iTrader: (10)

WARNING...this is VERY long and drawn out and even confuses me at times and I'm no pro tuner so the whole table I made might be screwy..

anyways Corey is dead set on tuning the ignition...so I say what the hell. Emanage presents you with a blank table(RPM x PSI) and allows you to adv/ret certain amounts throughout...anyways I'm not totally stumped, but was just wondering if any of yall had any input on the best way to go about this? his engine builder suggested 6* retard for 14psi. also being that the engine has a lower CR what are the thoughts on slight advance through vacuum up to around -.20 mmhg?(maybe 1*, or even 3* advance?) my plan is tune for 10 than 14 psi…we also have an MSD knock alert as well

I made a little mock table while I had time yeasterday and this is what I kinda came up with...based on my few datalogs, his max/target boost seems to hit around 4000rpm.

so basically...(all decimal values are kgcm2, NOT bar)...the order 1-7 means nothing, just the sequence on the map

1. 1* advance throughout vacuum up to -.20 mmhg(might adv more)

2. 0* advance/retard from 0 vacuum - .61kgcm2(~8.5psi)

3. -1* retard from .61 up to .70(@3500rpm) ~8psi heading into 10

4. -3* retard from .70(@4000rpm) up to .80(@4000rpm) ~10psi into 11psi

5. -4* retard from .80(4500rpm) up to .90 11psi into 13psi

6. -5* retard from .90 up to .90(@4000rpm) ~13psi heading into 14

7. -6* retard from .90(@4500rpm) into and through 1.00+(~14psi)

this might seem confusing but look closely at the table and it'll make perfect sense...(please ignore my desktop lurking behind there )



now I know you wont really be able to tell until its on the dyno and the MSD knock monitor is in place, but I think this might be pretty safe...basically if I did this right I'm just pulling random incriments around when max boost hits(3500-4000rpm)...so basically when he hits .70 kgcm2(10psi)(@4000rpm) he will have 3* pulled back as it goes into .80 kgcm2(11psi)..blah blah I’ll have some help probably from the dyno crew, but I wanna go into this with a clear undertanding.

areas I'm shaky on are the .80 to .90 transition(#5 and 6)(11-13psi) and I'm also shaky on how the coils will handle this madness. also in any of the areas does my timing seem too little or too much. this is kinda new to me, on the Honda rom editors I've used I'm used to having the igniton values already in the table, not adv/ret from scratch(same concept though)

MardiGrasMax

iTrader: (14)

When I had the normally asperated modified ecu and the J&S with the SC I did it like this.
I would see the first hit of detonation at ~5200rpm, this is when the torque peak was hit. At that RPM I was near 10psi, so I set the J&S to start retard at 9psi with 2/3 a degree per psi after that max i was pulling was 3deg. The SC peaked at 13-14psi at 6500rpm. I did not see any detonation with the J&S set this way. Stock timing is very conservative, I was running an ECU with advanced timing for NA performance with a 10:1 motor. I dont think you will need to pull any timing until 11psi perhaps 12psi. Do it in slow calculated inrcements, do allot of pulls and work your way up.

DA-MAX

iTrader: (10)

cool man...at this point I only see being able to do this right is to play it by ear when we dyno...so far hes peaked at about 9psi and had no detonation(no timing pulled) so yeah looks like I'll follow your advice and start pulling timing around 10 or 11 psi rather than 8. and since you say Maxima stock timing is rather conservative, than that combined with his low CR should allow plenty of room for error and maybe I should be able to pull alot less timing than I did...I dunno I'm tired now, can't think straight, time for sleep. I might make a few maps with different less aggressive combinations between 10-14psi and then on dyno day we can sort this out...thanks for the input though

Confused

iTrader: (4)

I don't know but pull the graph out of the way and lets see the desktop..

Redmax

iTrader: (20)

I was thinking the same thing!!!

Redmax

iTrader: (20)

Hey Addae, I just got off the phone with Moe from SRT and he said that we only have to retard 2 degrees at most on the car and that is where the turbo really begins to spool. Its only a precautionary measure. he also said not to advance the timing in any way. He said he will help us with the greddy map. Hey I got a dyno time and date set So call me ASAP!!! are wemeeting up tonight?

DA-MAX

iTrader: (10)

leaving work for class now..I'll call you in about 30

DA-MAX

iTrader: (10)

pick up your phone dammit!!!! anyways I'll come by at 7:30-8p...I need to do my OBD1 conversion too while I'm there. now to go pick up Jahlils SR