tuning with megasquirt help

[emo1010]

I have done alot of s-afc and with base timing tuning but this is my first stand alone attempt.

The set up is:
6bolt
evo316g set now to about 18 psi
560cc
walboro 190 lph
lc1 with gauge and hokked to the megasquirt.
base timing is set 5*

I just got the car idling right and cuising with good air fuel mid 13's afr the full throttle pulls are high to mid 12's on 93 octane. I have no logs right now, ill try to get some this weekend

The problem is the car feels flat like it has no timing but when I compare the timing table to others it seem very similar. If anyone has any advice or more questions that may help I would appreciateit.

Eric

 

[toofast82]

Is this 4g63 in a Spirit for real?

You want the car to be in 14.7:1 range during cruising and part throttle(closed loop)
Shoot for around an 11:1 at WOT on pump gas, you're pushing it at 12:1

Your high load timing does seem to be a little on the low side,
My suggestion would be to start with a 2g base timing map and work your way from there. The 1g map is a little aggressive for 93oct above 15psi as it peaks at 24*

For reference on a b16g,E8pump(190lph) and 560ccs, I was running around 24psi dropping to 20psi and about 20* at 6500rpm and 11:1 on 93oct

Are you using Speed density or MAF and which one?

 

[twdorris]

Is this 4g63 in a Spirit for real?

If so, very cool. A guy on our forum has done a 4G63 in an Avenger, complete with AWD swap. Another guy is running our ECU in a Volvo...with a Volvo engine. How cool it is to see these projects these days!?

You want the car to be in 14.7:1 range during cruising and part throttle(closed loop)

For proper emissions and to keep the cat happy, yes, you want the mixture oscillating around 14.7:1 on gasoline. But if you're just trying to get a smooth idle, you can often get better results locking it in open loop (during idle) and running richer than stoichiometric. That increases injector pulsewidth and makes deadtime variation from one injector to the next less critical relative to total pulsewidth.

Shoot for around an 11:1 at WOT on pump gas, you're pushing it at 12:1

I agree on the WOT mixture...especially if you're running running "high to mid 12s" as you mentioned. You're not getting any significant power over 11:1 by running that lean, IMO.

Your high load timing does seem to be a little on the low side

It does, but I wonder if MS takes into account the 5 degrees of mechanical advance when displaying the timing table? Maybe those numbers are all really 5 above displayed values.

One thing I might suggest is to smooth that timing table out more. You have a sudden drop from high 20s to low teens. That could be killing your mid range power and making the thing feel like a dog.

Does your setup have an active knock monitor feeding into the advance calculation? If so, do you see any significant activity at WOT?

Are you using Speed density or MAF and which one?

Based on the VE table posted, I would assume SD. But as long as he gets the mixture right, it shouldn't matter too much just for WOT tuning.

Thomas Dorris

 

[twister7]

post youre MSQ, i think i would start buy rescaling youre map and rpm valves!