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Competition Diesel racing, sleds, dynos, power tuning and max performance.

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Old 06-26-2007, 12:47 AM
Dustin_86 Dustin_86 is offline
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Unhappy Pulls- very disappointed

My buddy pulled his 91 two days ago. It is a F250,2wd, 4.1, ZF, 7.3. He "turned up" the screw on the pump. He hooked to the sled, and had no traction problems. He let the clutch out at 1500rpm in 1st gear and he got itmoving about 20' and about 1800rpm then it quicklt brought the 7.3 down to 1,000rpm-floored before he hit the clutch. Seems kinds weakto me it should ATLEAST spin the tires trying to move the sled. Are the IDI 7.3's that weak or did turning up the fuel screw "screw" him.
He Still thinks my 78 F250, NP 435 ,300 I6 would make atleast 100' before traction problems, but after seening that i'm not so sure.My truck should spin the tires in granny gear tied to a sled right?-maybe??
Thanks,
Dustin
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Old 06-26-2007, 10:40 AM
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when me and my brother used to pull we didnt want to spinn rite from the git go.on a good tight track(clay)the only time you should spin is when the sled "gets ya".we found out that granny gear was usless cuzz you cant get enuff speed out of it use 2nd low range and buzz the snot outa it
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Old 06-26-2007, 08:49 PM
Dustin_86 Dustin_86 is offline
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we found out that the 7.3 IDI will NOT even break the tires loose with 4.1's(2wd) and in low (zf5)
Do you think my 78 can?
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1978 F250 2wd RC,LWB,300 I6
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At least the Chow lets you know it is unstable, she just left cheated and called back crying with her appologies.
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Old 07-12-2007, 02:02 PM
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that is one tired id then. I had one before my current strokers and it would spin em right over WITHOUT much grunt at all.........
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Old 07-12-2007, 10:27 PM
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Huh, can't get a 7.3 IDI to break the tires? My buddy's 1992 F350 dually will whitesmoke the tires if you pop the clutch right, and his motor is plum wore out.
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Old 07-15-2007, 06:49 PM
Dustin_86 Dustin_86 is offline
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nope she wouldn't break them loose on clay, this has my 300/np worried
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At least the Chow lets you know it is unstable, she just left cheated and called back crying with her appologies.
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Old 07-18-2007, 05:28 PM
pioneer_plowboy pioneer_plowboy is offline
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Yours is 4wd, right? So put in 4-lo, and pull in 2nd. If you take off, and it is lugging, try to stop before the 75 foot mark, and you can start over. Use first then. But most of the guys around here pull like that with no problems.
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Old 07-20-2007, 08:38 PM
Dustin_86 Dustin_86 is offline
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no its 2wd, but I've seen 2wd's pull 250+ ft so it is more of atorque/gear question
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At least the Chow lets you know it is unstable, she just left cheated and called back crying with her appologies.
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Old 08-12-2007, 01:19 AM
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Quote:
Originally Posted by Dustin_86
nope she wouldn't break them loose on clay, this has my 300/np worried
have you played with the timming at all, or checked it?
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Old 08-15-2007, 04:11 PM
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im thinking that truck needs some engine work i have a 91 myself and i can get it to spin all 4 if im tied to something i cant move -not that theres much i can't move.
it can spin the rears just about anytime i want it to unless im above second.
iv got a rebuilt e40d and a tall rearend.
i hope you get that thing pulling better
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Old 08-16-2007, 05:24 PM
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I hope you have better luck next time. Me and and a good friend of mine both have 7.3L idi's w/ turbos and have never pulled under 210 in the single turbo class. But after the turbo my first clutch went fast.
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Old 08-20-2007, 05:05 PM
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Pull the 300. There are a couple of guys around here that pull 300's and they are very impressive for a 6 cylinder. I have never seen any 300 come in last unless they were pullin in the big block class. The one guy is running an 89 f-150 300 with 33" tires, posi rear and enough weight to make the 6500 and 7800 lb classes. I have never seen his tires quit spinning in the 5 years that I have been watching him pull. The motor is stock. Actually he bought the truck for $200 and just started pulling it aside from installing a mini-spool in the rear. He beats V-8's all the time. Now he has only won 1 time that I know of but everybody loves it when he comes to the line because of the big ole 6.

Oh yeah, his truck is 4x4 and a manual tranny also.
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Old 08-20-2007, 05:05 PM
 
 
 
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