Sunday pulls

Sled-pulling, Drag results, Dyno results

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Sunday pulls

Postby seeker1056 » Sun Jul 22, 2007 3:26 pm

Hello all - I finally can contribute - I made my first pulls today with my diesel truck

So we know what we are dealin with its a 91 Ford one ton, with a 5.9 cummins, twin turbo, open diffs, and street tires like an All Terain with 3:50 gears and a C6 tranny.

First class is local 7500 lbs - I had to add 1800lbs of sand in the box to get to 7400 with me in it.

HAving never driven a diesel before I just nailed it like i would a gasser - almost right off the chain - well I hit 50 psi boost, second gear, and then third then back to second and then first - so like 5 gear changes in 200 feet - blew the tires away and it was too late to backpedal as the track was chips wet down n very slippery - so I did like 216 feet on a win of 261 feet - so I am not feeing too embarreassed given i had the tires lit the whole track throwin mud from the track bein wet down. Finished fourth outa six, so all is good. Motor sat on 3350 rpm, 1200 degrees n 50 psi in all gears

Second run is a demo in the Pro Street Diesel class asanctioned pro class - they wiegh in at 8500 lbs, full mods, single turbo.

I eased it out this time in first for 20' then nailed second gear and left it there this time, and hung in there for a tire spinnin 288' two wheel squeal for fourth place. Not bad for being 1200 lbs under weight, and open diffs , street tires in a full mod class

I be smilin n thinkin of what to do next
91 F350 5.9 Cummins, Custom built VE 12v

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Postby KTA » Sun Jul 22, 2007 6:20 pm

Got any kind of idea what final gear ratio you are running in 2nd?
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Postby gman07 » Sun Jul 22, 2007 8:16 pm

That sounds like a lot of fun :D Once I'm through college and making some money, I think I'll give pulling a try.

Did you get the drive pressure issue fixed or are you still running higher than a 1:1 ratio?
1992.5 W250 pump tweaked, straight pipe, gauges, 3200 Gov. spring, AFC lever partially ground, timed at 1/8", Fuel pin ground, BHAF, HTT Stage IV H1C/E 60/12wg (ported), Transgo shift kit, KDP clothes-hangered, 202,000 miles - 36psi, 1250°
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things we forgot in all the excitement ;o)

Postby seeker1056 » Mon Jul 23, 2007 5:17 am

lol - in the heat of the moment - forgot to check hitch height and tire pressure - got home and its 19" on a 24" max, and tires were all at 36 psi


1st gear low range = 17.04
2nd gear low range = 10.11
3rd gear low range = 6.93

I carried each gear at full rpm ;o)

Intersting notes on drive pressure - when it is cool and damp out in the morning drive pressure is about 1.1:1 and during the middle of the day back up to about 1.7:1 at cruisin boost. Under power the drive pressure changes from 1.7 down almost to 1.2:1 ie at 45 lbs boost I am just at 60 drive pressure.

This is drivin me crazy tryin to figure that ratio thingy out.

But!!! 45-50 psi is 45-50 psi no matter how I get there lol. What a rush under power ;o)
91 F350 5.9 Cummins, Custom built VE 12v

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Postby KTA » Mon Jul 23, 2007 6:29 am

I take it a c6 is a non lockup tranny. Get your hitch right and some good tires and you might do ok. On the tracks around here if your truck is setup to hook you would have to run 1st gear. It takes about 1000hp and 2000ft-lbs to run a true 10.1 :1. With no lockup the converter lets you run the gear and stay on top, but I am shure if someone videoed it you could probably notice a decrease in wheel speed. When we were fooling with suncoast years ago on the 47rh trans and not running lockup we could run 3rd gear and the tires would just about stop, when we went to ATS and started pulling lockup we could only run 2nd, but 2nd locked was faster than 3rd unlocked. Congrats on your successful attempts anyways! 8) I am shure as you figure it out you will do better, but a 1gen taking the win shure would be sweet. :D
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Postby seeker1056 » Mon Jul 23, 2007 7:24 am

Nope no lockup in a C6 - and doubtfull anyone makes one. Given the power of the diesel, maybe a lockup would be a good idea, but how do they work?

We been runnin C6 in our superstocks for years, but never saw the slowdown your talkin about but then only at around 800 ft lbs at the best of times.

We video all runs - and even my run in third gear shows no noticable slowdown in wheelspeed till the weight hit, then i downshifted to second. I will see if I can get a copy from my friend

Got cut 35's comin for Fridays run, and the hitch is just an adjustment

I am still asskicikn myself for the hitch n tires, as I know better havin been a truckpuller for some 15 years, but I guess four years , an too much excitement is responsible for my olds hiemrs yesterday, lol

Fuel - first run I only had a puff of black for like 10' then no smoke at all

Second run had grey smoke for about half the run

So I need more fuel - but cant afford a set of "BIG" injectors at the moment

Anybody wanna loan me a set of injectors for some testing ;o) - hell i even got offered a free run on a dyno yesterday, if I wanted to cuz the owner was so impressed with it bein a VE, but turned it down till it is worhtwhile
91 F350 5.9 Cummins, Custom built VE 12v

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Postby KTA » Mon Jul 23, 2007 11:15 am

Lockup uses a clutch in the converter to make the input shaft of the transmission turn at flywheel speed 100%. The stall on the diesels is soo close to where they make peak power they never get close to fluid coupling like they do in a gasser where they stall at 4000 and turn 7000. On the diesel they stall at like 2500 and turn 3500 so its a fine line between laying on the converter stall and getting fluid coupling.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Boost pressures?

Postby seeker1056 » Thu Jul 26, 2007 6:48 am

"Things like HTB3's and H2E's are reserved for MASSIVE fueling on second gens for sled pulling, and as a bottom turbo in twins. Which u still need lots of fuel to run twins or u get high drive pressures and no boost. "


I am curious KTA, this came from Cowboy customs on the other site.

Could this be my drive/boost ratio problem?

I do know I dont have much smoke if any once spooled.
thanx
Ken
91 F350 5.9 Cummins, Custom built VE 12v

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Postby KTA » Fri Jul 27, 2007 5:27 am

I don't think that is your problem fom what I recall with just the 35 alone you still had bad drive pressure issues, lots of heat and no boost. Did you ever get anothet hx35 to try or even a stock h1c?
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Friday night pull

Postby seeker1056 » Sat Jul 28, 2007 6:38 am

looooong nite - pull started an hour and a half late, at 730 and I got to pull at 1;00 a.m.

3rd outa 11 trucks 255.31 on a 259' win - really soft track and heavy sled

still no traction - guess i gotta decide if I am gonna get serious, or park it ;o)

O and of the two trucks beat me, one was a new modified n stacked Dodge, and the other a stacked Ford
91 F350 5.9 Cummins, Custom built VE 12v

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Update

Postby seeker1056 » Mon Jul 30, 2007 10:05 am

now I be really feeling good about Friday nights pull - turns out the two trux that beat me were a little more than just modified - they were sanction class, Pro Streets, steppin down for what they thought would be an easy win.
91 F350 5.9 Cummins, Custom built VE 12v

Sponsors of new truck

Performance Diesel Injection
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Toms Contracting
seeker1056
14mm rotor
 
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Postby KTA » Tue Jul 31, 2007 5:39 am

Good job! 8)
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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