Hey guys, over the last few weeks I have been discussing this topic with a guy in my school car club. At first I was very skeptical and thought it was a bunch of BS, but I have finally been convinced to give this tuning method a try. It wouldn't take that long to build a new fuel and timing map and really put this to the test. Who knows maybe it really does work and Ill gain some hp.

Let me hear some of your ideas or thoughts on the subject. I will be putting the car on the dyno in a week and by then I will have two good maps to test out using 2 different tuning methods to see which produces more power.

This thread has a lot of good information in it.
http://www.uscmotorsports.com/forums/viewtopic.php?f=11&t=668

I will also be posting my results here so yall dont have to keep going back to that thread to check the results.

Spent a good bit of time today dialing in the new maps. I got the fuel adjusted to 12.0 under boost and started adding timing back in. I actually got to add a lot more timing than I thought I would be able to. I still need to work on the spark map a little more, I haven't picked up any knock yet so the timing is still getting advanced. This needs to be done on both maps before I perform the finally comparison.

However as I was finishing up tonight I did 2 pulls with the maps as they are right now and I must say that tuning to 12.0afr is looking promising at the moment. Boost was set to 19psi on both maps and pulls were back to back with only ab 5 min in between just to load the other map to MS. From now on Map A is my old tune set at 11.0afr, Map B is tuned to 12.0afr. Map B pulls noticably harder than Map A. I did some quick comparison looking at rpms/sec and Map B averaged almost 100rpms/sec MORE than Map A. Which is a lot when we are talking about 432 compared to 521.

So I decided to bring out a pull I did on 23psi +Meth spraying tuned to 11.5afr. This was the most recent tune I have been running on the car. While this map had a higher peak rpm/sec the overall average from 2k-6k was LESS than Map B.

Also just for the fun of it I used MSs hp calculator - Got ab 250hp on Map A. 300 on Map B and 300 on 23psi with meth so it obviously is making a good bit more power.

When I get the maps completed I will be posting up the pics of my logs showing the gains.

It makes sense to me. I don't recommend it to people who have no clue what the hell they're doing with tuning, but it sounds like it should actually work out quite nicely for you... So you did map b with no meth and still made that kind of power at only 19lbs? Sounds very promising if you run more boost and the meth on top of it. :)

It makes sense to me. I don't recommend it to people who have no clue what the hell they're doing with tuning, but it sounds like it should actually work out quite nicely for you... So you did map b with no meth and still made that kind of power at only 19lbs? Sounds very promising if you run more boost and the meth on top of it. :)


Exactly. I will be doin some more testing today after class. And then the real test will be on the dyno.

I wish I understood all of that, someday I will.

Ya same here Ned.

I'll be tuning for 11.5. Just safer for beginners.

Dave on lower boost I tuned to tuned to 12.0 aound 10psi. By 15psi I was down to 11.5 then for 20+ I tuned it down to 11.0 to make it a little more rich up top. This is the map I will be sending you if I can figure out how to send it.

Dave on lower boost I tuned to tuned to 12.0 aound 10psi. By 15psi I was down to 11.5 then for 20+ I tuned it down to 11.0 to make it a little more rich up top. This is the map I will be sending you if I can figure out how to send it.


That works. Can't you save or export it?

Interesting, I need to have my held to figure all that out.

Did a little more tuning the other day. The gains are not as much as previously thought. Looking at the rpms curves I see no difference between the 12.0 map and the 11.0 map. I haven't compared the rpms/sec which will give me a more accurate answer. This info will get posted when even I get a chance to review them again.

The car is getting dynoed on sunday this coming weekend. I plan on using my current map and also building a 12.0 map with meth on 23-24psi and actually comparing them on the dyno. So if there are gains to be had from tuning a little leaner I will find out soon.

It makes sense you would make more power, the combustion is more efficient and therefore you are literally creating more power with every explosion. a .5 raise in the A/f is equivalent to ~ +%4 gain in efficiency. However, I feel that for a street car and a DD being reserved on the A/F is a good idea. What about keeping the 19psi 11.5 map for street DD use and then using a 12.0 map and Meth for the track, the meth will both lower combustion temperatures and increase the octane of the fuel mixture, both aspects of which would make running a 12 a/f safer