Need some advice - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 12 (permalink) Old 02-10-2009, 12:47 AM Thread Starter
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Need some advice

So far I have only pulled once, it was in an indoor arena, and they were calling 250' a full pull. I pulled 232.5' for 5th place. I don't think it was too bad since I'd never done it before.

Here's where I need the help. How do I help reduce or eliminate front axle hop. I've got 38.50" tires, 8" lift (coil springs, not leafs ). About 30-40 feet into the pull, I had to let out of it briefly due to front axle hop, then again right at the end I let out early due to front axle hop.

Here's a video
It doesn't show the beginning or when I let off the first time.

Anyway, what can I do about this front axle hop? I've got a dual shock kit that I have NOT put on the truck yet, will dual shocks up front help?? I'm thinking about putting Bilstein 7100's up front, right now I've just got the cheapy Fabtech white tube shocks.

Any suggestions would be appreciated, and also, where can a get a good adjustable pulling hitch?

Thanks

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post #2 of 12 (permalink) Old 02-10-2009, 03:10 PM
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You need to get your wheel speed up: ie; 33's
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post #3 of 12 (permalink) Old 02-10-2009, 11:20 PM
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Definately need smaller tires to compete( thats why im lowering my truck soon)
and try ratchet strapping down the front springs to where they are compressed/loaded down, it really helps stop the hop on the coil sprung front ends.

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post #4 of 12 (permalink) Old 02-11-2009, 03:23 AM
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4 link and dual shocks is about the only thing that will cure the wheelhop.

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post #5 of 12 (permalink) Old 02-11-2009, 07:07 AM Thread Starter
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Quote:
Originally Posted by BogginF350 View Post
4 link and dual shocks is about the only thing that will cure the wheelhop.

Is there any specific valving for the shocks, that you'd recommend?

2005 F250 CC SB FX4
8" lift; 38.5" Procomps; ARP Headstuds; Banks Intercooler and High Ram Elbow; 4" Exhaust; SCT with custom tunes by Tony Wildman; Isspro Performax guages; '08 TT mirrors; Bushwacker Pocket Style Flares; Recon somked cab and mirror lights; Frontier front bumper replacement; AMP Research power runnning boards; Fabtech floating traction bars


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post #6 of 12 (permalink) Old 02-11-2009, 03:48 PM
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I'll say what has already been said. I would go with some 33's for pulling, until you have alot of power (650 +) I would not cinsider anything bigger, and still no more than 35's.

Ford's are notorious for front axle hop and chatter. I would have to assume Josh (BogginF350) knows his stuff, since he pulls alot with a Ford.

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post #7 of 12 (permalink) Old 02-11-2009, 07:19 PM
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Josh needs to get his four link kit done and up for sale

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post #8 of 12 (permalink) Old 02-12-2009, 07:34 AM Thread Starter
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Can you help me to understand why the large tires are bad for pulling, other that the final drive ratio aspect of them.

I don't understand what difference a 38 or a 35 will make as long as you have the appropriate gears for each size tire.

And also, what does wheel speed have to do with it? (assuming again that you have a good gear ratio in the axles)

Thanks, I'm a noob to pulling, I just want to do it for fun at local pulls, nothing more.

2005 F250 CC SB FX4
8" lift; 38.5" Procomps; ARP Headstuds; Banks Intercooler and High Ram Elbow; 4" Exhaust; SCT with custom tunes by Tony Wildman; Isspro Performax guages; '08 TT mirrors; Bushwacker Pocket Style Flares; Recon somked cab and mirror lights; Frontier front bumper replacement; AMP Research power runnning boards; Fabtech floating traction bars


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post #9 of 12 (permalink) Old 02-12-2009, 10:09 PM
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Quote:
Originally Posted by Keanoknick View Post
Can you help me to understand why the large tires are bad for pulling, other that the final drive ratio aspect of them.

I don't understand what difference a 38 or a 35 will make as long as you have the appropriate gears for each size tire.

And also, what does wheel speed have to do with it? (assuming again that you have a good gear ratio in the axles)

Thanks, I'm a noob to pulling, I just want to do it for fun at local pulls, nothing more.
well considering Josh is running 488s and well was 35s now 33s this year you would need some tall gears, then the pinion gets so small it will snap on a dana 60, also to compete you would have to lower your truck some to get all the angles half way in check for saftey. also wheel speed is what gets the momentum going down the track and going that much farther, So there is no real way you could gear your truck to spin those 38s at say 25mph all the way down and at the end of the track witch is what you want.

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post #10 of 12 (permalink) Old 02-13-2009, 02:45 AM
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Quote:
Originally Posted by brentos View Post
well considering Josh is running 488s and well was 35s now 33s this year you would need some tall gears, then the pinion gets so small it will snap on a dana 60, also to compete you would have to lower your truck some to get all the angles half way in check for saftey. also wheel speed is what gets the momentum going down the track and going that much farther, So there is no real way you could gear your truck to spin those 38s at say 25mph all the way down and at the end of the track witch is what you want.
exactly

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