2000 S10 Xtreme Drag Truck

[D.B]

I used the last two races of the season to test out my new engine. Saturday night was extremely scary. I went to the right lane, set the transbrake at 3500 rpm, shift at 6200 rpm and rev limit to 6800 rpm. First pass the truck wheelied and pulled hard to the right. Came very close to hitting the wall, got out of it. Ran a 6.53 with a 1.39 60ft. For pass 2 I went to the left lane, turned up the transbrake to 4000 rpm, shift at 6500 rpm and left the rev limit the same. Truck wheelied, pulled hard to the right, thought I was going to hit the tree, stayed in it. I hit the rev limit and I thought it did not shift into high gear. Ran a 6.39 with a 1.37 60ft. I decided I would turn it down to transbrake 3700 rpm and raise the rev limit to 7000 rpm. Ran a 6.30 with a 1.37 60 ft.

[biketopia]

Bummer on the red lights and hard pulls to the right! But the times are impressive. Any idea why it pulled so hard to the right?

[D.B]

Originally Posted by biketopia

Bummer on the red lights and hard pulls to the right! But the times are impressive. Any idea why it pulled so hard to the right?

When I staged I lined up more to the left of the groove and that seemed to straighten it out. Maybe I was out of the groove when I was first lining up. I thought I was lining up correctly. The S10 went straight on Sunday with no problems. I did notice the S10 needs an anti-roll bar. When the truck pulls the front wheels, the truck is not level. The anti-roll bar will fix that.

[LT7A]

I liked reading about this. Keep us up to date. Very clean little truck.

[D.B]

Update: Anti-Roll bar installed. Rear 4-link, front and rear shocks, front upper/lower control arms were removed, cleaned and greased. Truck is scaled and ready for the track.

[regan wilson]

Looking Darrell. When do I get to drive it?

[D.B]

Originally Posted by regan wilson

Looking Darrell. When do I get to drive it?

Let me know if you plan a trip to Xtreme and we can talk about it.

[D.B]

While the S10 was on the lift I noticed the front driver side caliper was dragging. Passenger side wheel would spin freely but the drive side wheel did not. So, I ordered seal kits and rebuilt the caliper. It is a 4-piston Aerospace Components brand. Very good quality and easy to rebuild. Now the wheel spins like the passenger side wheel, no dragging.

[biketopia]

Aerospace makes some really nice stuff that just works.

[D.B]

I finally had a nice day to go to the track and make some passes on the new anti-roll bar. Xtreme Raceway Park was open Saturday at noon so off I went. Made five passes and none of them were very good. I redlit 4 of the 5. On my 1st pass I cleared my delay box earlier and could not remember what my delay setting was. I was in the left lane and just entered a number in the box, stagged, light came on and I let go of the button. Truck rolled before I stabbed the throttle, redlight. Just cruised down the track. Got back to the trailer, checked by racers log and found the correct delay and entered it. 2nd pass, in the right lane, stagged, light came on, stabbed the throttle and it launched with the wells up. Redlight.



3rd pass, right lane, redlight.
4th pass, left lane, no redlight
5th pass, right lane, redlight

I never made a full pass because I hit my rev limiter each time way before the finish line. My truck settings are - transbrake (launch) is 4600rpm, shift at 6800 rpm and rev limit at 7400rpm. I run a 32" tall slick, 4.71:1 gear and a turbo 400 trans.

The next trip to the track I will set the truck up with - transbrake 4000rpm, shift 6500rpm and 7400 rev limit.

[Shark_13]

Awesome truck! Wow

[D.B]

If any of you watch YouTube videos then go to TSV Motorsports and scroll to 22:40.

TSV.pdf

[regan wilson]

I watched it Darrell. The truck is leaving good. What was the 60'?

[D.B]

Originally Posted by regan wilson

I watched it Darrell. The truck is leaving good. What was the 60'?

1.33 60ft

[D.B]

Hopefully the weather will change soon for the better. It is downright cold.

My last TNT at Xtreme had me thinking my 4.71 rear gears were just wrong. After more research I am thinking now my issue is fuel related. After doing some calculations about diff gear recommendations, the 4.71's maybe fine. I did find the positive and negative wires for the MSD box was not fully tightened. My fault must have got in a hurry when I replaced the box back last year. I was told years ago that the float level for E85 should be at half level on front sight window and almost to the top of the window in the rear. I checked and mine was right. I was also told I could run up to 7.5 psi fuel pressure before having any over pressure issues. So, I bumped mine up to 7.5 psi now.

Making and checking these made me think about my fuel pump and what its capacity was. I run a Magnafuel Quick Star 300. The tech sheet says it can handle 950hp naturally aspirated on race fuel but only 500hp on alcohol. Well, E85 is alcohol and I over 700hp. I am thinking fuel pump will need to be changed. I will verify when I go to the track soon. If I do need a fuel pump, I will go to the Magnafuel Pro Star 500. It handles up to 1200hp on alcohol.

[SCOTI]

Are you testing your e85 or is what your using spec mixed w/a data sheet provided?

Looking forward to seeing this one put some passes down.

[D.B]

Originally Posted by SCOTI

Are you testing your e85 or is what your using spec mixed w/a data sheet provided?

Looking forward to seeing this one put some passes down.

Yes, I do test my e85 and it came out as e90 which is very good. Hopefully the weather will turn right for me real soon. I need to get some runs in because the season starts March 23rd at Xtreme.

If you watch youtube videos you can check this link out below and scroll over to 22:40 and watch my run against a big block 68 Dart.

https://www.youtube.com/live/rLlmxoV...lk49aKc1w0Jv0M

[regan wilson]

Have fun and do good.

[D.B]

Regan, I removed the shift selector module and going back to the chips.



Today's runs were not real bad for me but not good either.

1st pass - .0128 light, 1.4266 60 ft, 6.2876 at 109.73 mph
2nd pass - .0095 light, 1.3796 60 ft, 6.2884 at 109.83 mph
3rd pass - .0538 light, 1.4890 60 ft, 6.3911 at 106.81 mph

For some reason the motor stuttered at the top end right before the finish line. Thinking it is the shift selector module.

Saturday heading south to Little River outside of Temple, Tx. Never ran the S10 at this track. So, this should be fun. Be more fun when I can start making rounds.

[D.B]

Well, the race at Little River was cancelled due to weather. I was hoping to get some runs in to see if the changes I made fixed the problems I have. I will try to get back to XRP before the next race for a couple or three test runs. Next race is at the Texas Motorplex in Ennis on April 13th.

The fixes I did was readjusted my shift pressure. M&M said their shifter needs 125 min to 150 max pressures. I found out somehow it dropped to 90. So, I readjusted it to 150 psi. Minimum bottle pressure is 800 psi and mine is over 1,000 psi.

Then I replaced the MSD RPM switch I use to activate the shifter with a new one. The old one I bought at a swap meet back in 2013 when I put the truck together. A poor man finds a way to build his toys. Mine was to use swap meet parts. I did the change because one: that was the only item I have not changed and two: the chip did not seem to fit as tight as with a new switch.

And lastly, I wired the MSD Digital 6 box direct to the battery. I had it wired through an MSD noise filter, then into a terminal strip that include a lot of other items. Not sure if mine was being feed "dirty" power. A "clean" power connection is direct to the battery terminal.

You never know what can cause gremlins in electrical components. Hopefully one of these fixes my problems so I can make full power runs.

[D.B]

I fixed the coolant catch can that broke a couple of weeks ago. Made a bracket out of an exhaust pipe clamp. Then put a strip of rubber between the clamp and can.

[regan wilson]

That's a good clean fix DB.

[HO455]

Originally Posted by D.B

I fixed the coolant catch can that broke a couple of weeks ago. Made a bracket out of an exhaust pipe clamp. Then put a strip of rubber between the clamp and can.


Attachment 2417976



Attachment 2417977

Nice fix. Now I'm going to have to start looking for the smaller truck clamps at the swap meets just for this kind of thing. Thanks.

[D.B]

Thunder Valley in Oklahoma. We were set to go Saturday but the event was rained out. So, we went Sunday. Got to the track around 7:30am. Got the vehicles unloaded, checked them out and got them warmed up. Track was to be live ready for time trials at 10am. But due to early morning rain the timing system was jacked up. The track worked on it until 2 pm and finally called it, No Race. They did tell us if we wanted too, we could make passes but there would not be any time slips. I was ok with this since I wanted to make sure the work I did on the S10 fixed my issues. The track provided us with an arm drop.
My first pass I set the transbrake at 3500 rpm launch and 6500 rpm shift. I did the big burnout to heat up the slicks, rolled to the line and the track official dropped the arms. I took off, beat the Dart to the stripe. The S10 never missed a beat, it ran perfectly.

The Dart driver said he wasn't ready and wanted to make another go at it. I said, "No problem, let's do it".

On to the second pass. I bumped up the transbrake to 3700 rpm launch and same 6500 rpm shift. Did my normal rolling burn out, rolled to the line. Arm dropped, the S10 shot out like a rocket and clicked off the shifts and beat the Dart to the stripe.

Went back to the trailer, very happy how the S10 ran. Was loading it up and the Dart driver thanked me for his lesson that day and complimented me on the truck and my arm drop reaction.

Next event will be at Houston Motorsports Park on Saturday May 10th. My plans are to go watch Regan Wilson run Friday May 9th at the Texas Motorplex, then get home so I can get all loaded up for the Houston trip. Saturday is going to be a long day.

[regan wilson]

Good to hear the truck worked well for you. It sucks to drive that far for a rainout but it happens. I'll be at the Motorplex from the 13th to the 17th