Thread: Trying to get a better grasp on tuning for WB 11.1-11.3

So right now im tuning with 89octane, prolly not the smartest thing to do but im giving it a try and thus far its going fairly well. I got AL103 with the electrode arm cut in half and gapped to like 0.040. I just swapped out my washer fluid nozzle from the M2, which looked broken when I took it out, to a larger M5. the PCM’s afr is at 10.5 and I only have gotten on the throttle as much as 80-85% throttle. Barely any blips of KR but I did go a bit more and I usually get 1-2* of KR while commanding 18-20* of timing on the 3.1” pulley. My PLX-SMR WB is showing between 10.1-10.5. and my NB o2s are ~955-970.
Im tuning via PT and I have the AE enrichment table above 85-100% at 132%, stock’s at 128%. I want to be able to dial in at ~11.1-11.3 KR-free. I do have 42.5# injectors, so I can add fuel whenever, its just when I try to dial in at 11.1-11.3 while the pcm’s also at 11.3 I get KR and need to lower timing to 15*. Any higher and I get knock if I add timing. Any suggestions to adjust in the PT? im also tuning fuel on the fly with the AFC2.2 so I don’t have to retune the 7250+ MAF table quite often. I can e-mail a copy of my bin if anyone’s curious and willing to help
Thanks in advance

That's pretty lean isn't it? I thought the sweet spot for a street tune on our cars is around 11.8.

quite the oposite actually, its rather rich. remember that at diela nd cruise u want to stay stoich at 14.7:1, and in PE mode u want to go richer to prevent detonation and possible engine failure so u want to go lower to be richer.

Oh ok, that makes more sence then. I'm a tuning n00b

x2, i was gonna say, isnt vinnie running the mp112 hybrid?

As far as the o2's they do look rather rich. Not to sure since you have the alky setup but it seems like PE o2's should be in the 920-930's. Maybe lower. Now with my setup my PE 02's should be anywhere in the 890's to 920's. BUT since it is around 103 in GA you can bet there in the 920's right now.

Originally Posted by fst

x2, i was gonna say, isnt vinnie running the mp112 hybrid?

I'm running an actual MP112, but I didn't do a lick of the tuning.

basic -20*F washer fluid which has IIRC 30/70 methyl/water distribution. i already swapped out the M2 to the M5 and set the devils' own controller to ~10.75. the number scale on their controllers is off by one, meaning if it says 5psi its really 4psi and since the max i saw the other day was ~9.7psi(seems kinda low with a 3.1" and current mods) i set it at 10.75.

what would be the mixture of adding a pint of HEET to a gallon of the -20* washer fluid?

Reptile, what size nozzle are u currently using now?

im thinking about rolling an M4 pretty soon after i get paid again or something.

yea HEET seems to do the same thing, prevent the gas line from freezing with the water in the gas during the winter. on their site it says it contains methanol and other chemicals but IIRC on the 'other' forum, others use HEET in their gas tanks, so i feel fairly confident i can dump it into a gallon of washer fluid and see how it performs, otherwise i can use to mix with distilled water and get a 70/30 methanol/water mixture. anyways what is the proper mix between a gallon of water to xx amount of Air line Antifreeze?