I pulled 256hp/206tq on stock ECU with: DP, Catback, Intake, EVC IV set at 11PSI. New plugs (< 3k miles), no porting on the motor. EVC IV reports ~400mm of vacuum at 800rpm idle on average temp day around here (80 degrees, 5-15% humidity).

I've since added M2 Stage III but haven't dynoed yet. The car is noticably stronger (and no more fuel cut ) I am running at around 11PSI still (I'm somewhat afraid of my intake temps at higher PSI). I would guess the car is pulling around 270hp/217tq now.

The stock ECU dyno on my car shows no signs of ignition breakup so it is possible to not get the high RPM breakup without adding twin power or other ignition amp.

I also run low weight (10W30) synthetic oil which has been shown to raise HP numbers due to less friction in the engine over fossil oils of the same weight.

P.S. HP numbers in post are Dynojet numbers not Mustang.

 

i think 9/9's are a safe bet. they may drop your hp a little but at least you'll be running cooler plugs.

oh and get a better cb. you prob. see a huge diff!

 

The chance of higher RPM break up on a stock ECU, is mainly cause your only at 11lbs. I mean these guys are talking about 14-18 lbs of boost, and ususally rich conditions to hault detonation.

 

I dont get noticable breakup either below 12psi. But I know its there eating up my precious HP

 

Save for the HKS one. I would go with the HKS one mainly because of simplicity. I heard its VERY plug and play.

[edit] Also since your going electrnics , look into that lightweight battery that is like 14lbs , that thing is nuts. My friend has it in his rx8, its really nice.

 

Wow - 304 hp? I have 275RWHP now, with HKS intake/catback, RP pulley, M2 stage 2, ATR dp, and that's it (power-wise).... I had hoped going to M2 stage 3 and intercooler would bring me at least to 304 RWHP... is that just a pipe dream?

The dyno above was done on a dynojet at KDR... friggin' hot there that day... (95 degrees F?)

 

What times you seeing at the track?(1/4 mile) and have you auto-xed? or tracked? Maybe some temps?

 

They hks twin power ignition raised my rwhp on a dynojet 248c from 296 to 304. I got to 320ish when I switched the hi-flow cat to a resonated MP. The torque went from 261 to 280 to the wheels. I found the dyno sheet and if I remember correctly, both correction factors were in the 1.02 to 1.03 range for the two runs.

I've since went with the PFC and leaned it out into the 11.4 to 1 range on the A/F ratio. At a tad over 14 psi, I'm at 363 rwhp and 320 ft/lbs.

Tim

 

BTW, I've got a dyno appointment set up later this month if I can stay away from work to test a few cat-back exhausts. On one of the runs, I'll turn the HKS unit off and get a run in to compare it on and off.

Tim

 

Tim so with you switching to the PFC your went from low 300's to mid 300's. Thats a huge diffrence from the M2 ecu to the PFC. Interesting.

 

I think he jumped up the boost a bit too.

 

Yeah, I've tracked (the Glen (twice), VIR, and Mid-Ohio) -- 4 different events, 3 tracks.

I've hit the dragstrip once... ugh -- gotta learn how to launch... bog city...

first run: 13.8x @ 102 mph
second : 14.1x @ 105 mph
third : 13.9x @ 107 mph

My 60' in the first run was 2.1xxx , but then I shifted late out of 1st and actually hit the fuel cut before I shifted to 2nd...

The 60' in the 2nd and 3rd runs were pitiful at 2.6xx

 

No just understand that dynoing a car in a specific sea level will make a differance in your readings. Also the engines current compression will make the biggest differance. Thats probably why most of you guys are getting every differant numbers with similar mods and the stage 3. Project Rx7 in SCC dynoed the advertised hp but it had a low mileage engine with healthy compression.

 

again I think it's primarily about flow, that's why the numbers are so erratic

to get the most out of the Pettit or M2 ECU, you need a ported engine, midpipe, hard pipe intake, free flowing (straight) IC tubes, besically everything you can do to get more air in and out of the engine

they tune the things conservatively because they don't want you to pop your engine....M2 even warns against running a mp because they fear the n00bs...

350 rwhp can be done on the Pettit.....proven fact

 

that is not a pipe dream at all. I had the M2 stage 3, m2 med. ic, m2 dp, n1 dual, stock cat and dynoed at 277whp, 243 tq. dyno plot showed that I was braking up badly after 6500k due to overly rich a/f.The misfiring the dyno plot showed was something I could never feel when I drove the car. I have now installed the HKS TP and will be going back to the dyno soon. I'm sure that it will be able to ignite all the fuel that I was spitting out the exhaust.

I installed jpandes's hks tp on my car and after it was taken off, you can tell the difference. Also, one visual cue was that without the HKS tp, during wot at high rpm's, I would look into the rear view mirror and see black hazy smoke from all the excess fuel. Now with the HKS tp installed, under wot, there is no more hazy smoke. I'm pretty sure the HKS Tp is doing its job of igniting all the excess fuel that the M2 chip is programed to dump out. I'm faily confident that with my given mods, I will now dyno around the 300rwhp range. I will be going soon and will post results....


Check out my thread about troubleshooting M2's overly rich fuel map.
my m2 stage 3 dyno without hks tp

 

Thought I'd bring this back since it related to me a bit.
Currently Im getting my motor back with an agrresive street port, full rebuild lost it to a o-ring seal. I want to put the Stage 3 M2 After the extensive break in. I plan to add a highflow pump to that too. Then depending on my AFRs on the dyno I plan to turn the boost up little by little (running non-seq). Until I get it to bump in the 11s (since I know it will never give me a flat line 11). Intercooler, HKS, and many other mods listed here would be part of the plan. I would like to break the 300hp mark but since that seems to be a bit hard I'd be happy with 280 to 290.

BTW The disclaimer on the ECU says not to use with ported engine, anyone experienced any side-effects (besides more HP) because of this?

Thanks!

 

I know Brian Richards, owner at M2, said not to use it with a ported motor. Obviously the fuel requirements are a tad different but also the timing changes a little with a ported motor.

Tim

 

I agree the M2 ECU does run rich. I noticed some backfiring when I got off the throttle and a black bumper near the RB dual tip. Adding the Crane Ign Amp helped alot with the eliminating any kind of break up above 6500 rpms. I would imagine a Twin Pack would work even better. I switched back to the stock ECU for emmissions testing with my set up and noticed improved gas mileage and no soot on the bumper. I guess with my mods I risk detonation until I switch back to the M2 ECU but I have not noticed any problems. I will switch back the M2 when I get the car out of storage this spring. All this discussion is making me consider going to a PFC commander set up if I can save up the bucks!

 

So would this be to say that a Stage 2 M2 ECU should NOT be used on a motor with any kind of porting (any something fairly mild)?

That time is coming soon where I"ll "have the motor out anyway" and it would be a good time to have porting done... assuming it was safe....

 

Some will say they've used the M2 or Pettit with a ported motor with no problems, but according to Brian, he doesn't recommend using any of his rechipped ecu's with a ported motor.

Tim

 

You shouldn't have to switch back to your stock ECU for emissions testing. The M2 ecu mainly just has changes up high in the rpm / boost maps and is pretty much just like stock down low where emissions testing occures. I passed the California Dyno smog stest with an M2 Stage 3 ECU, the M2 bolt ons (exhaust, downpipe, intake, intercooler) and a stock main cat.

 

I agree, I have passed smog with mine, as have many others.

 

M2 also doesnt suggest using MP with their ECU. And I am using it with success. It also leaned out the top a bit, but I still sometimes get backfiring/hesitation. I will put in new plugs though, before I fork out for the HKS TP.

Or I'm just thinking of selling this ECU and going PowerFC.