78 Bronco weight transfer - Ford Bronco Forum
 
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post #1 of 12 (permalink) Old 04-08-2016, 03:06 PM Thread Starter
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78 Bronco weight transfer

This seems like the best place to post this questions on here. I have a 78 bronco on 35" bogger/TSL's and ~6" lift. Mild 460 maybe 430HP, 550 ft/lbs, 4.56 gears, c6 np205. I am trying to get it to hook a little better off of a brake launch. In sand drags/hill climbs I typically launch in Low/drive and let it shift on its own. I will be putting some softer springs in the rear, which I'm sure will help with the weight transfer. Is there anything else I can do besides the softer springs to get it to launch harder? Other than the obvious, better tires, more power, etc...


2011 Ford F150 FX4_____1978 Ford Bronco
5.0L, CAI _____________466bbf, 6" lift, 35"tsl/boggers
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post #2 of 12 (permalink) Old 04-08-2016, 04:10 PM
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Originally Posted by fordaholic495 View Post
This seems like the best place to post this questions on here. I have a 78 bronco on 35" bogger/TSL's and ~6" lift. Mild 460 maybe 430HP, 550 ft/lbs, 4.56 gears, c6 np205. I am trying to get it to hook a little better off of a brake launch. In sand drags/hill climbs I typically launch in Low/drive and let it shift on its own. I will be putting some softer springs in the rear, which I'm sure will help with the weight transfer. Is there anything else I can do besides the softer springs to get it to launch harder? Other than the obvious, better tires, more power, etc...
I think the softer springs will hurt you and cause bad axle wrap. Instead, I think it's your tires that hurt you. I think you should get some paddle tires or cut boggers. That will be your best solution. I think your are simply overpowering your boggers and more than likely spinning like crazy off the brake. I spend a lot of time in silver lake and its a night and day difference running paddles over mud tires.

1981 Baby Blue Bronco built to go fast in the sand
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post #3 of 12 (permalink) Old 04-08-2016, 04:20 PM
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I just read your build thread and great Bronco! I will look for you this summer in Silver Lake

1981 Baby Blue Bronco built to go fast in the sand
LS3 480hp w/ reverse manual TH400
Atlas II 2.0 x-case
Full cromoly cage w/ racing seats
Raceline Monster beadlocks on 35" BFG KM1's
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post #4 of 12 (permalink) Old 04-08-2016, 08:49 PM Thread Starter
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I think the softer springs will hurt you and cause bad axle wrap. Instead, I think it's your tires that hurt you. I think you should get some paddle tires or cut boggers. That will be your best solution. I think your are simply overpowering your boggers and more than likely spinning like crazy off the brake. I spend a lot of time in silver lake and its a night and day difference running paddles over mud tires.
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I just read your build thread and great Bronco! I will look for you this summer in Silver Lake
Thanks! Looking forward to seeing ya out there.
When I put the deaver leaf springs in, I will build a traction bar if there is significant axle wrap. I agree traction is an issue, I just thought if I could somehow get some more pressure on the rearend by transferring weight better then I could make better use of the tires I have. Cuts and paddles are just so pricey. Someday I will have a set though, of each!


2011 Ford F150 FX4_____1978 Ford Bronco
5.0L, CAI _____________466bbf, 6" lift, 35"tsl/boggers
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post #5 of 12 (permalink) Old 04-08-2016, 09:14 PM
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Sounds funny maybe, try doing a couple hole shots with the rear window down. What do you run for air pressure?
I have very similar setup and mine launches just fine, the window helped with it down. I am running less power and 4.10's but 35" MTZ's so not quite as much grip. It also helped once I put a full size spare in the back and the traction bar did a lot of good off the line, especially in the sand. Usually do not get beat off the line in my truck just out powered in the big end.
20141026_133747_zps1lcatorc.mp4 Video by CrazyBRONCOguy | Photobucket Runs better now but that was a couple years ago.


The Street Queen: '92 Eddie Bauer- C6 Swap, Roller 357W 400hp/400ft-lbs, SCT Tuned, 4" Lift, 4.10's,
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post #6 of 12 (permalink) Old 04-08-2016, 09:48 PM Thread Starter
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Sounds funny maybe, try doing a couple hole shots with the rear window down. What do you run for air pressure?
I have very similar setup and mine launches just fine, the window helped with it down. I am running less power and 4.10's but 35" MTZ's so not quite as much grip. It also helped once I put a full size spare in the back and the traction bar did a lot of good off the line, especially in the sand. Usually do not get beat off the line in my truck just out powered in the big end.
20141026_133747_zps1lcatorc.mp4 Video by CrazyBRONCOguy | Photobucket Runs better now but that was a couple years ago.
Your bronc sounds good!
I run 10-12 PSI, mostly because I'm paranoid about rolling a tire off the bead. Think I could run less? I prefer taking the top off for silver lake, not sure if that hurts or helps, but it's more enjoyable in the truck.
Is that video from the strip there in Mears? I have wanted to run there, but every time I go they are running the dragsters or something.


2011 Ford F150 FX4_____1978 Ford Bronco
5.0L, CAI _____________466bbf, 6" lift, 35"tsl/boggers
My build thread!
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post #7 of 12 (permalink) Old 04-09-2016, 08:36 AM
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I also run @ 10 in the rear and usually 12-14 up front on dirt. I do think you could try less in the rear.
I have ran at west Michigan but that video is from down in Madison IN at a dirt drag strip, it was only 180' instead of the full 300'
Maybe also try running fuel tank of fuel also.... I do think once the deaver leafs are on there, if you go that route, it will be better as they will squat as the front coils come up.


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post #8 of 12 (permalink) Old 04-09-2016, 09:00 AM
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Waaaay back when i ran swampers i ran 5 pounds in the rear and 7 in the fronts.

If you go to west michigan on fridays of race weekends you can test and tune, run as many times as you want.

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post #9 of 12 (permalink) Old 04-09-2016, 07:40 PM
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Have you installed a traction/antiwrap bar on it. I have a anti wrap/traction bar that a friend and I built. 7/8ths heim on forward end with a shackle, and delrin bushings on the 2 rearend mounts. It works awesome and lets the suspension do what it is meant to do without axle wrap. Better Launches for sure.
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post #10 of 12 (permalink) Old 04-10-2016, 12:34 AM
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Cutting the boggers you have now is FREE!

1981 Baby Blue Bronco built to go fast in the sand
LS3 480hp w/ reverse manual TH400
Atlas II 2.0 x-case
Full cromoly cage w/ racing seats
Raceline Monster beadlocks on 35" BFG KM1's
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post #11 of 12 (permalink) Old 04-10-2016, 12:41 AM
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Anything to move weight from the front to back will help with transfer. But less weight is usually better in sands. As well as lower air pressure and more aggressive tires.

If your not against cutting your current tires that will help some.

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post #12 of 12 (permalink) Old 04-10-2016, 05:44 PM Thread Starter
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I drive my bronco on the road quite a bit, and that's the only reason I don't cut my current boggers. Plus they are only about 30-40% tread, not sure they're worth the effort. I need a second set for around town and some cuts for the dunes! And change to rear engine to get that big block off the front end!


2011 Ford F150 FX4_____1978 Ford Bronco
5.0L, CAI _____________466bbf, 6" lift, 35"tsl/boggers
My build thread!
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