MSD 2 step with auto trans (Updated Track Results)
On The Tree
Joined: Aug 2013
Posts: 132
Likes: 0
Good job Ron, moving in the right direction. I'd say converter first, then gears if you run out of engine RPM wise before your ET goal. Also I highly recommend getting with Jarrett for one of these Yank converters, you won't be disappointed.
I think Ron is closing in on 150mph...probably should just leave everything alone and focus on the tune and a couple more psi. Converter is ~1000.00 and a gear change is probably 700.00+ with the spool/axles etc. Not sure the ROI would be that great with the changes in question.
Staging Lane
Joined: Oct 2004
Posts: 89
Likes: 0
From: In the garage
Thanks. 3.42 was my plan. Will require new spool and axles.
I'll look into PTC. Got a contact recommendation there?
Guys also seem to like the Yank Pro series.
I'm sneaking up on this thing. I'm surprised at the power to be honest. A few guys at my track on pump with more boost are 10 mph slower.....
I'll look into PTC. Got a contact recommendation there?
Guys also seem to like the Yank Pro series.
I'm sneaking up on this thing. I'm surprised at the power to be honest. A few guys at my track on pump with more boost are 10 mph slower.....
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
On The Tree
Joined: Aug 2013
Posts: 132
Likes: 0
I think Ron is closing in on 150mph...probably should just leave everything alone and focus on the tune and a couple more psi. Converter is ~1000.00 and a gear change is probably 700.00+ with the spool/axles etc. Not sure the ROI would be that great with the changes in question.
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ron glad to see that is working for you . 145 mph is flying
did you try lowering the timing on the 2 step and see what it does. when I was setting up my launch control i used the denmah setup and he had it pulling 10 degrees timing in launch control. i just lowered the 2 step rpm to 1650 rpm and it works pretty good even set that low. im going to get some runs in next weekend and im planning on raising the rpm 100 at a time until i find my best launch.
did you try lowering the timing on the 2 step and see what it does. when I was setting up my launch control i used the denmah setup and he had it pulling 10 degrees timing in launch control. i just lowered the 2 step rpm to 1650 rpm and it works pretty good even set that low. im going to get some runs in next weekend and im planning on raising the rpm 100 at a time until i find my best launch.
I believe Forcefed uses the timing retard rather than advance method even on his transbrake with great results. Builds a lot of boost that way. I know with the launch control on manual cars that is what we did. Pulled timing and dumped the fuel with a spark cut and it worked pretty well.
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
Hey guys. You are doing an excellent job of spending my $$$!
I used the Wallace calculator with my numbers and the actual slip is 9.7-10%. I assumed 146 mph, the speed trap is an avg over the last bit of the track.
Anyway, not horrible.
Thanks for the PM Dustin. Maybe you could chime in and tell us what a typical slip is for the PTC 9.5.
The first thing I want to do is reset the CalTracs back to what worked with the rat. And get to a good track.
As far as the two step setup, I put it in Thurs, raced on Friday. I have just a bit more experimenting to do there.
Running out of season, sometimes we make it through Oct, sometimes we are done mid Sept.
BTW, if I were employed, I'd already have the converter and gears. I just need to spend money wisely.
Ron
I used the Wallace calculator with my numbers and the actual slip is 9.7-10%. I assumed 146 mph, the speed trap is an avg over the last bit of the track.
Anyway, not horrible.
Thanks for the PM Dustin. Maybe you could chime in and tell us what a typical slip is for the PTC 9.5.
The first thing I want to do is reset the CalTracs back to what worked with the rat. And get to a good track.
As far as the two step setup, I put it in Thurs, raced on Friday. I have just a bit more experimenting to do there.
Running out of season, sometimes we make it through Oct, sometimes we are done mid Sept.
BTW, if I were employed, I'd already have the converter and gears. I just need to spend money wisely.
Ron
Staging Lane
Joined: Oct 2004
Posts: 89
Likes: 0
From: In the garage
Hey guys. You are doing an excellent job of spending my $$$!
I used the Wallace calculator with my numbers and the actual slip is 9.7-10%. I assumed 146 mph, the speed trap is an avg over the last bit of the track.
Anyway, not horrible.
Thanks for the PM Dustin. Maybe you could chime in and tell us what a typical slip is for the PTC 9.5.
The first thing I want to do is reset the CalTracs back to what worked with the rat. And get to a good track.
As far as the two step setup, I put it in Thurs, raced on Friday. I have just a bit more experimenting to do there.
Running out of season, sometimes we make it through Oct, sometimes we are done mid Sept.
BTW, if I were employed, I'd already have the converter and gears. I just need to spend money wisely.
Ron
I used the Wallace calculator with my numbers and the actual slip is 9.7-10%. I assumed 146 mph, the speed trap is an avg over the last bit of the track.
Anyway, not horrible.
Thanks for the PM Dustin. Maybe you could chime in and tell us what a typical slip is for the PTC 9.5.
The first thing I want to do is reset the CalTracs back to what worked with the rat. And get to a good track.
As far as the two step setup, I put it in Thurs, raced on Friday. I have just a bit more experimenting to do there.
Running out of season, sometimes we make it through Oct, sometimes we are done mid Sept.
BTW, if I were employed, I'd already have the converter and gears. I just need to spend money wisely.
Ron
I installed the 2 step and tested it in the driveway.
I found some info on how to set the timing and fuel while activated. Basically the same as W/O a 2 step. Lean with a lot of timing.
I'm pretty conservative, so I set it to 2400 rpm, 12.5:1 AFR, and 29 deg of timing.
I saw just over 2 psi. I figured it would go a touch higher at the track with my silencer removed. It's pretty restrictive.
Not a lot of boost, but a start. Given that it takes .5 second on a normal run to go from 85 KPA to 116 KPA, I'd reduce that from the spool time.
At the track, it made right at 3 psi on the 2 step.
First pass, I got it on the 2 step, but didn't give it enough throttle to build boost. Typical me forgetting my game plan at the line.....
Car ran 9.84 @ 145.35. Hmmm, promising, it didn't spin once boost hit. World record mph for the car as well.
2nd pass I got it hard on the 2 step, bumped into the 2nd stage light, floored it and released the brakes. The car moved good for about 10 feet then wasted the tires.
Reviewing the log, I left at 121KPA, and within .9 seconds was at full boost with the tires smoking.
I didn't bother with another pass. No track prep and radial slicks just don't work.
So, this is hugely promising. My first runs with the car it would lazily build boos not getting to full boost until 100ft out in. Where it would fog the tires....
Now I'm seeing full boost in less than a second, so I've essentially moved the fog the tires point 90ft closer to the starting line.....ha!
I believe with more timing...maybe 33 degrees, and a leaner AF, maybe 13.5:1 I can get more boost for the leave.
Still on 15 PSI. E85 of course.
Ron
I found some info on how to set the timing and fuel while activated. Basically the same as W/O a 2 step. Lean with a lot of timing.
I'm pretty conservative, so I set it to 2400 rpm, 12.5:1 AFR, and 29 deg of timing.
I saw just over 2 psi. I figured it would go a touch higher at the track with my silencer removed. It's pretty restrictive.
Not a lot of boost, but a start. Given that it takes .5 second on a normal run to go from 85 KPA to 116 KPA, I'd reduce that from the spool time.
At the track, it made right at 3 psi on the 2 step.
First pass, I got it on the 2 step, but didn't give it enough throttle to build boost. Typical me forgetting my game plan at the line.....
Car ran 9.84 @ 145.35. Hmmm, promising, it didn't spin once boost hit. World record mph for the car as well.
2nd pass I got it hard on the 2 step, bumped into the 2nd stage light, floored it and released the brakes. The car moved good for about 10 feet then wasted the tires.
Reviewing the log, I left at 121KPA, and within .9 seconds was at full boost with the tires smoking.
I didn't bother with another pass. No track prep and radial slicks just don't work.
So, this is hugely promising. My first runs with the car it would lazily build boos not getting to full boost until 100ft out in. Where it would fog the tires....
Now I'm seeing full boost in less than a second, so I've essentially moved the fog the tires point 90ft closer to the starting line.....ha!
I believe with more timing...maybe 33 degrees, and a leaner AF, maybe 13.5:1 I can get more boost for the leave.
Still on 15 PSI. E85 of course.
Ron
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
World of difference with traction!
So big smile on my face!
1/8 mile.
6.13@117.4 and repeated with a 6.12@117.15
60 ft was 1.52. Not earth shattering, but way better than 1.7.
2600 on the two step, it makes 125kpa.
I know there is a bunch more in it.
Ron
So big smile on my face!
1/8 mile.
6.13@117.4 and repeated with a 6.12@117.15
60 ft was 1.52. Not earth shattering, but way better than 1.7.
2600 on the two step, it makes 125kpa.
I know there is a bunch more in it.
Ron
Thread Starter
Joined: Aug 2011
Posts: 4,729
Likes: 814
From: Portland, OR
Right now I'm at 2600 rpm, 12.5:1 and 29 deg timing.
It's just doing it, I'm far from an expert tuna.