waynehartwig
www.jeeperman.com
- Location
- Mead, WA
Took it to the track Friday night for the first time since the engine swap and it did well, not as well as I think it should, but very consistent. I think it should be well into the 15's.
First off, I got yelled at by the track official during my first burnout. Pulled up, burned out, let off the brake and burned 'em across teh start line. Stopped, backed up to stage and got a talking to. Something like "Dont you ever do that again unless you are running nitro!". DOH!
16.3 @ 83.5 mph. I made 5 passes and all of them were 16.3-16.4 and 82-84 mph. So good honest numbers and good honest power. Nice to see track conditions didn't play on it to hard - started out at 85* and ended up just under 70*.
It's very sluggish off the line until it gets up to about 3k RPMs, then it pulls very strong! The motor would also drop out at 6k RPM. 1-2 wasn't noticeable, because it was fast (didn't know it until I saw the log file). 2-3 was very noticeable, with a few MPH loss, and right at the bottom of the track.
The lag, I think I got figured out - just added a bunch more timing down low. Basically took everything below 8* and made it 8*. Down low it was -12*. The log file only showed some false knock. I was running low octane pump gas.
The gear change/engine management deal was tricky, but I finally figured it out. The engine has a cold start feature that depending on engine temp and length of runing, has a limited RPM set. So unless I was running more than 80 seconds, my limit was 6000 RPM's. It's now set to 6800 like my extreme cut outs
(shift RPM's are set much lower, and conservative)
This was an issue because the lines were long. So I'd shut it off while I waiting my turn. On my last run, a guy scattered his motor and it took them about 45 minutes to clean up the track. While this was going after dark with a 10 mph wind and 70* outside, my engine/trans lost a lot of heat. Then we get up, do our burn outs, and the official stopped the race again. Apparently the pair that just ran left some oil in the #2 lane all the way down the track. So they had to clean that up. So because of this, I know my motor wasn't running for more than 10-15 seconds before I left.
I also found that my injectors are too small for this motor - stock injectors that came with the motor. My duty cycle on them was 82%. I've seen that number a lot higher on other engines, so I'm not real concerned with it yet. Plus, I was a little too rich - 11:1. Since I'm naturally asperated, I am shooting for a 12.5:1. But it does show that if I plan on running much more horsepower, I will need to replace them with some higher flowing units.
So anyway, I've made the changes and will try again Friday night I think I should be into the mid 15's. Not bad for a 6,000 lb rig, STOCK 5.3 motor and 39" tires
First off, I got yelled at by the track official during my first burnout. Pulled up, burned out, let off the brake and burned 'em across teh start line. Stopped, backed up to stage and got a talking to. Something like "Dont you ever do that again unless you are running nitro!". DOH!
16.3 @ 83.5 mph. I made 5 passes and all of them were 16.3-16.4 and 82-84 mph. So good honest numbers and good honest power. Nice to see track conditions didn't play on it to hard - started out at 85* and ended up just under 70*.
It's very sluggish off the line until it gets up to about 3k RPMs, then it pulls very strong! The motor would also drop out at 6k RPM. 1-2 wasn't noticeable, because it was fast (didn't know it until I saw the log file). 2-3 was very noticeable, with a few MPH loss, and right at the bottom of the track.
The lag, I think I got figured out - just added a bunch more timing down low. Basically took everything below 8* and made it 8*. Down low it was -12*. The log file only showed some false knock. I was running low octane pump gas.
The gear change/engine management deal was tricky, but I finally figured it out. The engine has a cold start feature that depending on engine temp and length of runing, has a limited RPM set. So unless I was running more than 80 seconds, my limit was 6000 RPM's. It's now set to 6800 like my extreme cut outs
(shift RPM's are set much lower, and conservative)This was an issue because the lines were long. So I'd shut it off while I waiting my turn. On my last run, a guy scattered his motor and it took them about 45 minutes to clean up the track. While this was going after dark with a 10 mph wind and 70* outside, my engine/trans lost a lot of heat. Then we get up, do our burn outs, and the official stopped the race again. Apparently the pair that just ran left some oil in the #2 lane all the way down the track. So they had to clean that up. So because of this, I know my motor wasn't running for more than 10-15 seconds before I left.
I also found that my injectors are too small for this motor - stock injectors that came with the motor. My duty cycle on them was 82%. I've seen that number a lot higher on other engines, so I'm not real concerned with it yet. Plus, I was a little too rich - 11:1. Since I'm naturally asperated, I am shooting for a 12.5:1. But it does show that if I plan on running much more horsepower, I will need to replace them with some higher flowing units.
So anyway, I've made the changes and will try again Friday night
I think I should be into the mid 15's. Not bad for a 6,000 lb rig, STOCK 5.3 motor and 39" tires 
