Well, here it is: 12.34@110.71
Jun 18, 2005, 01:08 AM
#1
Well, here it is: 12.34@110.71
Due to some tuning blunders on my part, I didn't get the MPH I was looking for with just pump gas (93oct), but I ended the night well.
Pump (93):
Best ET - 12.644@106.04 1.748 60' (Flat timing in 4th gear = weak mph)
Best MPH - 12.698@107.21 1.795 60' (Last run on pump I had just finally figured out how to get my timing to start advancing some...even on this it didn't go above 14 in 4th)
Best 60' - 12.654@106.26 1.711 60' (One of my great runs that fell flat in 4th from bad tuning)
Best 1/8th ET - 8.024@84.57 1.711 60'
Best 1/8th MPH - 8.132@86.31 1.774 60' (No clue how I hit 86 on this one, since my trap was only 104.76...)
Mixed gas (4gal 93/4gal 104)
Only got one run - 12.344@110.71 1.789 60' (Culmination of finally figuring out my timing advance along with some higher octane. Didn't get a chance to run at this power level a 2nd time, otherwise with a 1.75 60', it would have been a 12.2x. I also hit the rev limiter in 4th 2 counts before the finish line, so it should have been 111+ if not for the stock rev limiter)
The most valuable tuning lesson I learned tonight was not to focus on O2s first, but rather timing. I was getting a good AFR, but my timing was flat. I had to richen it up some to get the timing curve back to normal in 4th. I didn't understand that my tuning was now different with higher boost due to the different timing maps my ECU was choosing because of the higher airflow levels. Now I know...
Pump (93):
Best ET - 12.644@106.04 1.748 60' (Flat timing in 4th gear = weak mph)
Best MPH - 12.698@107.21 1.795 60' (Last run on pump I had just finally figured out how to get my timing to start advancing some...even on this it didn't go above 14 in 4th)
Best 60' - 12.654@106.26 1.711 60' (One of my great runs that fell flat in 4th from bad tuning)
Best 1/8th ET - 8.024@84.57 1.711 60'
Best 1/8th MPH - 8.132@86.31 1.774 60' (No clue how I hit 86 on this one, since my trap was only 104.76...)
Mixed gas (4gal 93/4gal 104)
Only got one run - 12.344@110.71 1.789 60' (Culmination of finally figuring out my timing advance along with some higher octane. Didn't get a chance to run at this power level a 2nd time, otherwise with a 1.75 60', it would have been a 12.2x. I also hit the rev limiter in 4th 2 counts before the finish line, so it should have been 111+ if not for the stock rev limiter)
The most valuable tuning lesson I learned tonight was not to focus on O2s first, but rather timing. I was getting a good AFR, but my timing was flat. I had to richen it up some to get the timing curve back to normal in 4th. I didn't understand that my tuning was now different with higher boost due to the different timing maps my ECU was choosing because of the higher airflow levels. Now I know...
Last edited by Warrtalon; Jun 18, 2005 at 01:12 AM.
Jun 18, 2005, 01:19 AM
#2
Newbie
Join Date: Jun 2003
Location: Anchorage, AK
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Warrtalon
Due to some tuning blunders on my part, I didn't get the MPH I was looking for with just pump gas (93oct), but I ended the night well.
Pump (93):
Best ET - 12.644@106.04 1.748 60' (Flat timing in 4th gear = weak mph)
Best MPH - 12.698@107.21 1.795 60' (Last run on pump I had just finally figured out how to get my timing to start advancing some...even on this it didn't go above 14 in 4th)
Best 60' - 12.654@106.26 1.711 60' (One of my great runs that fell flat in 4th from bad tuning)
Best 1/8th ET - 8.024@84.57 1.711 60'
Best 1/8th MPH - 8.132@86.31 1.774 60' (No clue how I hit 86 on this one, since my trap was only 104.76...)
Mixed gas (4gal 93/4gal 104)
Only got one run - 12.344@110.71 1.789 60' (Culmination of finally figuring out my timing advance along with some higher octane. Didn't get a chance to run at this power level a 2nd time, otherwise with a 1.75 60', it would have been a 12.2x. I also hit the rev limiter in 4th 2 counts before the finish line, so it should have been 111+ if not for the stock rev limiter)
The most valuable tuning lesson I learned tonight was not to focus on O2s first, but rather timing. I was getting a good AFR, but my timing was flat. I had to richen it up some to get the timing curve back to normal in 4th. I didn't understand that my tuning was now different with higher boost due to the different timing maps my ECU was choosing because of the higher airflow levels. Now I know...
Pump (93):
Best ET - 12.644@106.04 1.748 60' (Flat timing in 4th gear = weak mph)
Best MPH - 12.698@107.21 1.795 60' (Last run on pump I had just finally figured out how to get my timing to start advancing some...even on this it didn't go above 14 in 4th)
Best 60' - 12.654@106.26 1.711 60' (One of my great runs that fell flat in 4th from bad tuning)
Best 1/8th ET - 8.024@84.57 1.711 60'
Best 1/8th MPH - 8.132@86.31 1.774 60' (No clue how I hit 86 on this one, since my trap was only 104.76...)
Mixed gas (4gal 93/4gal 104)
Only got one run - 12.344@110.71 1.789 60' (Culmination of finally figuring out my timing advance along with some higher octane. Didn't get a chance to run at this power level a 2nd time, otherwise with a 1.75 60', it would have been a 12.2x. I also hit the rev limiter in 4th 2 counts before the finish line, so it should have been 111+ if not for the stock rev limiter)
The most valuable tuning lesson I learned tonight was not to focus on O2s first, but rather timing. I was getting a good AFR, but my timing was flat. I had to richen it up some to get the timing curve back to normal in 4th. I didn't understand that my tuning was now different with higher boost due to the different timing maps my ECU was choosing because of the higher airflow levels. Now I know...
Good run and congrats
Jun 18, 2005, 04:19 AM
#6
Originally Posted by Corey
Nice times, but could you put down all the info instead of splitting it up for just the best times and ET's? I would like to see the whole run from beginning to the end. 
Trending Topics
Jun 18, 2005, 09:08 AM
#8
Evolving Member
iTrader: (2)
Join Date: Apr 2005
Location: boise Idaho
Posts: 158
Likes: 0
Received 0 Likes
on
0 Posts
Well there it is. Whey was it so hard to believe my times. You ran the exact time I did and all you have on me is boost controller. 12.34 to my 12.34. Needless to say good job. Im going out again tonight to try for 12.2. I think I can do it if the weather stays cool. Should be about 65 degrees tonight. Not to mention it looks like you picked up roughly 50whp on race gas. You sat there and told me it was impossible and you just did it yourself. What were your afrs? You keep mentioning timing, how are you monitoring your timing? I think the reason that you were pulling timing when you leaned it out is because you didnt have enough octane. The more octane you got the leaner you can go without detonation, therefore pulling timing.
Ps. what did your boost taper off too??
Ps. what did your boost taper off too??
Last edited by whiteevo311; Jun 18, 2005 at 09:14 AM.
Jun 18, 2005, 02:25 PM
#15
Originally Posted by 1.8t
So you would say to place more emphasis on your timing curve than running a slightly leaner tune?
I'm still at the track, so I'l write a lot more later. I just hit a 12.32@101 on a 1.72 60'. I tried to shift to 5th and screwed up, then coasted across at 101, but got my best time ever, and it's 80 degrees. That was a sure 12.2 and maybe better, since my 1/8th was 7.80!!!! I have no idea what to do now...I can't go any faster than 111, and I'm hitting the rev limiter way before the traps. I might try to shift to 5th earlier, but I'm in brackets now, so it's hard to experiment.
I had a bye in the 1st round due to best R/T in qualifying, but there was an odd number, so I had to race. If I get a true bye, then I can get another free test run.