So, I'm working on getting the part throttle stuff dialed in (waste of time too, considering I'm going to make some rather major changes here soon) and I'd like to get the WOT stuff right as well. My problems with that are there are no tracks close to here, and the closest one is really a lousy track, theres no traction to speak of and the return roads suck. So... since I am taking the car to get dyno'd again for another baseline, how useful would it be to tune the spark curve there? I know driving the car and having it spin its wheels on a dyno are two completely different things, but will it at least be close or is it a complete waste of time and effort?

 

depends on how good the operator is. some guys can create hills and other things

 

Max, I have found the best results by capturing data with a scan tool and then monitoring the improvment with a "common" speed test at a "common spot".

To avoid "wheelspin issues" I roll-on the throttle until I am doing about 20 mph in WOT (and hopefully not spinning) and then monitoring the time it takes to hit 70 mph. This way I don't have to worry about local "Gendarme".

I feel that this is the best test, short of an actual track run.

 

I really wish I could. Last 2 times out trying to do just that, almost got busted both times. I did it a while back and was almost afraid to try it again, because I had barely gotten far from home. I finally tried that again a couple weeks ago, and guess who? Bad luck... Its track or dyno only I guess with that car. Too much traffic around here to use the freeway either.

 

That's too bad. When I lived on the "Coast" the best I could find was on flat "on-ramp" from a Rest Stop. I found "early mornings" was the best time.

 

If you go to the track the real monitor of Horsepower is mph anyway,though this may not help much with your low rpm stuff but 3000+ it should show you if you are making gains.
If traction is that poor lower alot of timing at stall speed
to minimize of line torque.

 

Ya, actually doing some tuning, is a waste of time, once folks like you that know it all, don't need to sharpen their skills. Once you do one car once, you know it all so why bother?.

If you really were trying you could get all but the last 5% done without even making WOT runs.

Course that means getting the tools and knowing how to use em.

By using a dyno you can always blame them for things being crappy, rather then figuring things out yourself.

Having a good scapegoat,
priceless......

 

Well thank you, thats quite helpful. If this is the best you have, its pretty weak. Cya around.

 

His name isn't Grumpy for nothin'

 

Where the hell did that come from? Makes ya wonder......

 

That's usually the response I got from that guy too. He'd rather nit-pick your post than relay some useful info.

Anyway, I think any time on the dyno would be useful. With the car right there you could churn out a bazillion chips and get it real close. Of course it wouldn't be perfect. As you'd expect if the weather gets real hot and the engine runs hotter then you might have some cells in the SA table that are a little too advanced and will ping.

They'll probably have a wide-band for you to use as well...icing on the cake.