jrussell

Well, I made it back to the track last night so the old truck could redeem itself of the mid-18 it ran last time. This time I ran it in 4wd and built around 15-20psi at the line. First run was a 16.7 @ 78mph and second was a little slower at 16.8. On the second run I actually pulled my foot out of the throttle near the end to try and force a 3-OD shift. It still didn't shift and obviously that slowed me down a little. The first run it shifted into OD right near the finish line at around 3100-3200RPM. The power seems to really drop off around 2800RPM so I think an earlier shift into OD would give a little faster times. I know when OD hits on the highway it usually feels like I got rear-ended by a semi.

Launching in 4wd is awesome too! It pulls so hard in 1st gear and I beat both the cars I raced off the line (to the 60' mark). They were pretty fast cars too at 15.8 and 13.8. RT's were much better this time at .621 and .135. Oh, and this was using a 60%/40% water/meth mix.

gman07

And your tranny isnt gone yet?

You can wire up a potentiometer to make it shift into OD when you want, and it will replace the TPS.

jrussell

I've only launched it like that a couple times and don't plan on racing it every weekend. I think a driveline/diff/axle would break before the tranny though. With a tight TC I bet it would be in the high 15's or really close. How do you think the tranny will like it then?

I don't really need the TPS/potentiometer fix for normal driving and towing. The OD usually hits between 50mph and 70mph which works great. If I take it back to the track again I might rig one up because I'm pretty sure it would help ET and MPH if that shift was a little sooner. Maybe I really need a piston lift pump to help with the upper RPM fueling now.

gman07

I've heard the output shafts like to break at >15psi launches, but that's probably on a little more powerful trucks. You could also adjust your TPS down a little for the track. I used to run mine at about .7 volts when it was still on the truck, and it would shift around 42mph in normal driving.

flashgordon

Whay to go!!! I new there was a much better et.,in it!!! only two time trial? you didn't try and compete?

EDIT
A tenth of a sec between runs is vary compeditive for a street class!!

jrussell

I'll keep it around 15psi or less next time...thanks Gman.

Flash: Not sure about the time trials/competition thing. This was the "street legal midnight drags" and I wasn't aware of any time trials or competition. Do they do something like that at these events? Now that you mention it, I noticed on my way out at about 1am there were only a few cars lined up to go again and I didn't want to push my luck and run a 3rd time for no real reason.

Man, if we were competing I would have killed it! The runs were actually 16.787 @ 78.70mph and 16.800 @ 77.55mph. My best 60' time was 2.220 (is that good?). Also, how can you have a RT of .135? I thought the lights were .500 apart and .500 is a perfect reaction time? I don't think I redlighted so that has me puzzled.

wannadiesel

Rig a mystery switch that grounds the OD solenoid so you have OD when you want it (orange wire with green stripe). If the switch is off, the OD works as normal.

jrussell

Wow, thanks Wanna, that sounds really easy to do!

Can I have that switch and still use the stock switch like normal? I assume this would just go between the stock switch and the solenoid then?

flashgordon

http://www.rmrracing.com/2006/schedule/event-times.htm

k i gess the midnight drag is just a heads up night of racing? I have never been to the midnight drags. when to street legal once w/my cuda(when it had cheater slick)when i when down the wrong week end and desided to race any way(it was licenced and had tire to get a way with it, at the time!) and no that,s not the first place trophy, thats in my pic gallery!

street legal,and et. series have, 2 time trial, then right your et on the window and go racing!!!

looks like the midnight drags would be the eseast way to go race my truck if i deside to....

flashgordon

Man, if we were competing I would have killed it! The runs were actually 16.787 @ 78.70mph and 16.800 @ 77.55mph. My best 60' time was 2.220 (is that good?). Also, how can you have a RT of .135? I thought the lights were .500 apart and .500 is a perfect reaction time? I don't think I redlighted so that has me puzzled

Thats way good et's

.500 is a perfect light but a couple years ago thay desided to make it so the spectators could under stan it better and .000 is the same perfect light as the .500 was!
so in ether word you were 135 thousens of a sec slow of a perect light....less then a blink of an eye!!!!
If you can get your truck to be that consistent(consistancy is what wins races not the fastes et! ) You should go to a street legal night and clean up!!!!

Just for a comperison my 60' time with my cuda and 4:56 gears are 2.210!

smokin92

I knew that there was a better time in her. It is amazing what 4wd will do. I wish I had that luxury in my truck.

Begle1

That's with a stock torque convertor?

How much do you weigh? I would think that you're a second or two too slow, especially with four wheel drive and the 15 PSI powerbrake...

flashgordon

Got to remeber, thats at 5000 feet!
I would be willing to bet that he will be able to kill almost a1/2 sec off his time with just some tweeking of his now truck pkg and brake into the 14s with a tranny upgrade W converter!!!

jrussell

Yeah, the stock TC is burning up a lot of the power. I am positive with a tight TC it would be in the high 15's or very low 16's. I've never driven/ridden in another 1st gen with an auto, but I think my TC might be even more slippy than a normal stock one.

Not sure on the weight, but I would guess about 6500 stock + class V hitch and remainders of the plow mount. With me and a few tools too it's probably about 6800 or so. Also, don't forget the altitude as a contributing factor.

Hey Smokin, when are you planning on going again? Even if I don't run mine, I would like to take a ride in yours and see how the TC feels compared to mine.

flashgordon

Ha jrussell, did you try Dave's mystery switch yet!