froggy47

Anyone try one they liked? Before/after dyno?

I know it's already highly tuned, but an extra 10 or so hp is good.

Froggy

Apocolipse

Better off buying a Halltech 103. Basically does the same thing and leans it out a bit.

froggy47

You running it?

Apocolipse

Yes, I have a 103. It under reports the maf airflow by ~4%.

froggy47

Educate me. If a maf is "programmed" to under report air the less air = less fuel so it's leaning the mix out? That how it works? Did you get a tune also?

It seems like the Halltech is doing what a tune does, the same end result, lean it out a little, or am I wrong?

So why would a guy get both? Just asking?

Froggy

92rsz

That's pretty much what it does is lean It out. The oem tune is stupid rich after 4000 rpm. It commands 11s from there to redline. Even with the halltech under reporting 4% it's still rich. That's why an mf103 and a dyno tune is usually worth ~30 whp. Gets the afr in the low to mid 12s where the ls7 likes it

Apocolipse

Ls7 doesnt need more timing so for a stock motor a tune just adjusts wot afr.

GoVolsZ06

If you do heads get them ported and milled. I did and added a mf108 with a dyno/street tune. Car did 512 rwhp with these basic mods.

froggy47

Thanks all, so the mf103 does some leaning, but not "enough".

Why would you not just skip the mf103 and do it all with the tune? Not like the mf103 is cheap?

Apocolipse

Because some people want to keep things stock. If you do - then u do halltech. If you dont then open it up and do whatcha want.

froggy47

OK, got it.



If I bought ls1 edit or other tuning software, does it come with the necessary hardware connections and any instructions such as "How to tune an ls7 motor"?

I bought a clone tech 2 and it came with a LOT of hardware connections but very skimpy "paper book" on what to do.

Back in the day I was a cobol & fortran programmer, not afraid to mess a little with a gm engine module.



I emailed one of the Canned tune companies but they did not have anything for ls7.

Apocolipse

The stock tune is great...not much to change hence not much power to be had. All that you would do for a stock engine is lean wot out. Otherwise doesnt need it. And really at that its like 10hp.

froggy47

Where I need it is WOT, for autox, In a typical 60 sec. course I will (briefly) go WOT 3 or 4 times. It might only be for 2-5 seconds, but we win/lose at thousandths of a sec. So every bit matters.
When I am at part throttle, if I'm over say 4k rpms, I've always got more power under my foot, But at WOT that's all she wrote, full is full.

Anyone got a used mf103 off a car they are selling? $600 on FleaBay all day long.

Unreal

Completely disagree tune is just leaning out WOT and maybe 10hp. The turning off or reduction in torque management alone is HUGE gains in lower gears. Doesn't show up on a 4th gear dyno pull, but when the car is limiting power in 1-3rd gear you will sure feel that.

froggy47

Tell me more about torque management, I confess I don't know much about it. Is it a nanny like traction control and active handling? When I turn all the nanny's off (2013 z06) is torque management still limiting me?

Help?



Found this about torque mgmt

Actually, what it was originally intended for was to "soften" the power during shifts on automatic transmissions. This was to make for smoother shifts, and to reduce shock to the drivetrain during shifts. It basically retards timing (it may control other parameters as well on todays more electronically controlled engines).

I realize that I am a skeptic on how far TM goes, so you have to understand that there will be conflicting answers. But let me continue. There is some degree of what people are calling TM on all cars today. During certain "events", the computer may reduce timing in order to save the engine from itself. I personally consider this to just be a basic function of the engines tuning. As long as the car is putting out it's rated horsepower, then I don't believe that TM is actually holding a car back, as many people believe.

My belief is that what many people are calling TM (when it pertains to 1/4 mile times) is actually more the intrusive nature of todays traction control and active handling kicking in. Why do I think that? Because I have had a C6 at the track, and I did experience some unexpectedly intrusive traction control and what appeared to be the rev limiter kicking in before I reached redline when I was in competitive mode. When I turned TC/AH completely off, there were no such issues, and even during very hard shifts, I never felt like power was being pulled (and my 1/4 mile times verify this).

So we enter the never ending you're right you're wrong phase of my original post.

froggy47

Just to refresh everyone's memory it's a 2013 z06.

Unreal

TM has nothing to do with traction control or AH, and is separate. You can't turn it off with the button. It limits torque production and cuts power in certain gears and situations.

Plus tune adjust fan speeds, removes speed limiters, removes skip shift, etc etc. So it isn't just max power.

froggy47

So both automatic, stick, ls7 all have it, you are sure? Different in different applications?

Unreal

Yes, they all have it.

froggy47

So really the Halltek 103 is just a little part of what a tune will do.

Should I buy ls1edit or such and learn it myself?