Looks good Tom! Definitely looks like a beast!

The general area of peak torque. I would just be interested in seeing the results. It's nice to get some good hard data like that with E85 timing/AFR, especially around peak torque.

Thanks Freddie. It definitely feels much more transformed now when boost hits.. before it would be smooth, now it yanks you back aggressively.

No problem, thats easy enough.. and extremely fun for me as well. I will try to get this done tomorrow. I couldn't do anything today because of rain.

I dug up something interesting from last night logs..... heres one pull vs another. its definitly timing creating the aggressive torque spike. the ****ty thing is the timing stopped logging on my last pull because the stupid cursor pad had my mouse pointer in the evoscan menu and i accidently unticked it i guess.. but here is the graph and here is also the raw datalog:



= 5.csv

What wast he difference in timing between those two runs above in the graph at 4500RPM? The yellow line with the higher torque is even about 4 psi lower, yet has about 40tq more. I think that datalog snippet is from the run shown with the red line?

Your load is going nuts because you are supassing the limit for your 1byte load factor. What do you have it set at now...something like 1.9?

yes that snippets from the red line. its set to 1.8. what do you recommend i set it to? i see 430 load at 7000rpm & my maps are scaled to 500. should i set it to 2.0?

do you think i can manipulate that spike if i start at the same rpm as i did that created that spike? I think the timing is around 2* where it will spike like that.. I will try to recreate it tomorrow to confirm.. or i will just force timing at peak and do pulls and compare differences. i think the spike occurs with 2* tho.. im not positive tho. its gotta be around 1-3 tho.. i think the trick might be to ramp it as soon as you hit the mbt so it carrys the torque higher instead of repeating the same number and making it flatline.

Your 1byte load factor should be set to cover whatever load you are hitting. Max load = 255 * 1 byte load factor (in both your ROM and in your logging program).

So, 255*2.0=510. If you hit over 510, then raise it some more. Any time you see the load loop back around 0, it is because it went past your max load setting for your 1 byte load factor. You can tell how much you need to raise it by how far past you are.

As far as the timing at 4500RPM for the two graphs above, are you saying that 2* gave you that torque spike where 4* gave you the lower torque? If so, then that 4* is past MBT. I just want to be sure I understand what you are saying.

that is correct. i believe the 4* is also over mbt, but since i have a built motor it wont cause any issues to do a few runs like that. i believe that 2* is the torque spike. I will confirm all of this tomorrow for you and my self and we can make an analysis of this torque spike deal. i think whats causing the aggressive spike is how fast the timing gets ramped up after the initial cell is hit for that spike instead of repeating that number you ramp it up asap. this is why the dyno tune was at so much loss of torque because the number just kept being repeated and not ramped up.

I simply think your timing was just past MBT in that area. E85 for some reason doesn't seem to like a lot of timing at peak load/low RPM. I think you definitely give some hard data exactly to this fact. And you even have a 2.3 which enables a bit more timing to be run.

This is definitely some great data. Keep it coming. I also agree that a few runs isn't going to hurt your built motor. But definitely don't keep it past MBT for longer than needed. Get the car back in the range where max torque will be made and keep the bearings as happy as can be.

Again, definitely awesome numbers and an awesome setup.

Thanks man. I will report back with more findings as I gather them together. Hopefully tomorrow I can find exactly what creates the high torque spike then I will post my findings here.

good data, and great numbers

I like !!!

Interesting data

is your road logging; data that stopped @ 5100 rpm, a 3rd or 4th gear pull?

Good to see that the buschur race is helping ya out. Thats what I went with , dropped my car off at buschur yesterday morning. I cant wait

Thanks.. you got some fast dsm's it looks like

every pull I do is always 3rd gear.

Honestly I dont know if it helped or not, im digging up old logs with the perrin and the perrin made over 500whp at just 29psi. the perrin also made more hp then the garrett core 35 psi vs 39psi.. so im not sure yet.. but then again i only got a chance to alter the tune 1 time so all the power is yet to be extracted. I dont know if the consistent pulls had to do with the intake air temp vs timing tables i changed or what but i might pull the garrett core back off and test the perrin back to back to get 1000% confirmation.

Keep in mind I have one of the super super old perrins, the new ones are made horrible compared to the old ones. Buschur has confirmed this in his testing.