The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Racing and high performance (trucks haulin more than hay)

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-30-2013, 07:52 AM   #1
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
What about bags?

So I got this idea about running bags up front only on my 69 c10 for adjustable ride height. My original plan was to have a track only truck, but I had an idea of making it street worthy too. Is it possible to run bags at the drag strip?
Only problem I can think of is that my truck might just lift the wheels off the ground and when it lands, it may just blow the bags out.
Anyone see a problem with it?
low&slow is offline   Reply With Quote
Old 10-30-2013, 10:22 AM   #2
Marv D
Registered Truck Offender
 
Marv D's Avatar
 
Join Date: May 2008
Location: hells training ground (aka Ariz)
Posts: 3,118
Re: What about bags?

I think there is probably a good reason you don't see air bag suspension at the track. Blowing the bags I don't think would be an issue, it's the lack of stored energy would be pretty counterproductive at the track IMO.

__________________
Still playin with trucks, even at my age!

When you're dead, it's only a problem for the people around you, because you don't know you're dead.
.....It's kinda the same when your STUPID.


I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.
Marv D is offline   Reply With Quote
Old 10-30-2013, 06:02 PM   #3
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
Re: What about bags?

What do you mean by stored energy?
low&slow is offline   Reply With Quote
Old 10-30-2013, 10:33 PM   #4
tinydb84
Registered User
 
tinydb84's Avatar
 
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
Re: What about bags?

Quote:
Originally Posted by low&slow View Post
What do you mean by stored energy?
It has to do with weight transfer from front to rear. Someone will chime in with more info but this is a good read regardless:

https://www.cachassisworks.com/Attac...1-226_drag.pdf

Edit: Look at page 5
__________________
David
Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991
My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985
Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557
Instagram: myfabguy
tinydb84 is offline   Reply With Quote
Old 10-31-2013, 11:13 AM   #5
Marv D
Registered Truck Offender
 
Marv D's Avatar
 
Join Date: May 2008
Location: hells training ground (aka Ariz)
Posts: 3,118
Re: What about bags?

In simple terms,, a 1500 pound load on a front suspension spring, has 1500 pounds of 'lift' wanting to be released as the leverage of the tire / torque removes that weight.
It wants to 'help' the leverage of the suspensin take the weight off the front, and put it onto the rear.
__________________
Still playin with trucks, even at my age!

When you're dead, it's only a problem for the people around you, because you don't know you're dead.
.....It's kinda the same when your STUPID.


I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.
Marv D is offline   Reply With Quote
Old 10-31-2013, 11:47 AM   #6
Marv D
Registered Truck Offender
 
Marv D's Avatar
 
Join Date: May 2008
Location: hells training ground (aka Ariz)
Posts: 3,118
Re: What about bags?

Oh,, and a spring will have a LONG travel to release that 1500 pounds, where a air bag will only have a very few inches of travel to release all of it's 'stored energy'

That make sense?
__________________
Still playin with trucks, even at my age!

When you're dead, it's only a problem for the people around you, because you don't know you're dead.
.....It's kinda the same when your STUPID.


I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.
Marv D is offline   Reply With Quote
Old 11-01-2013, 11:33 PM   #7
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
Re: What about bags?

So you're saying that by having bags in the front, there is less energy being stored than there is with springs/shocks resulting into less front end lift also resulting into less weight being put on the rear end for a loss of traction?

I think I'm beginning to understand. So for a shock that has a lot of travel, the front end weight will lift higher putting more weight on the rear rather than having a bag and only a little travel for not very much weight transfer?
low&slow is offline   Reply With Quote
Old 11-01-2013, 11:45 PM   #8
tinydb84
Registered User
 
tinydb84's Avatar
 
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
Re: What about bags?

Quote:
Originally Posted by low&slow View Post
So you're saying that by having bags in the front, there is less energy being stored than there is with springs/shocks resulting into less front end lift also resulting into less weight being put on the rear end for a loss of traction?

I think I'm beginning to understand. So for a shock that has a lot of travel, the front end weight will lift higher putting more weight on the rear rather than having a bag and only a little travel for not very much weight transfer?
1. Yes

2. I assume you mean spring? Yes, typically you need a softer (as it will be longer) spring to maintain a good ride height
__________________
David
Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991
My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985
Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557
Instagram: myfabguy
tinydb84 is offline   Reply With Quote
Old 11-01-2013, 11:57 PM   #9
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
Re: What about bags?

Yes I meant spring. Makes sense for why there isn't bags at the track.

What about those adjustable springs. Wouldn't I be able to set them up for track use and then for the street, turn them a little and lower the front of the truck? Or vise versa?
low&slow is offline   Reply With Quote
Old 11-02-2013, 12:03 AM   #10
tinydb84
Registered User
 
tinydb84's Avatar
 
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
Re: What about bags?

Adjustable springs? as in coilovers? yes but there arent really coilovers for our trucks unless you do a porterbuilt/scotts/etc set up
__________________
David
Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991
My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985
Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557
Instagram: myfabguy
tinydb84 is offline   Reply With Quote
Old 11-03-2013, 10:28 AM   #11
Marv D
Registered Truck Offender
 
Marv D's Avatar
 
Join Date: May 2008
Location: hells training ground (aka Ariz)
Posts: 3,118
Re: What about bags?

Here's a picture to do the 1000 word thing.. A full tilt drag race front suspension/spring (and this is just a 2600 pound car) look at the length of the spring to hold up a very light car. I put travel limiters on it to limit the rise and try the limit the wheelstands.





Where an airbag has a whopping ,,, what 3" maximum travel to unload ALL of it's support.

You commonly find airbags in the right rear coil spring as a chassis tuning aide to help plant both tires evenly. But as a suspension... there better left to the slammed street crowd

just imo
__________________
Still playin with trucks, even at my age!

When you're dead, it's only a problem for the people around you, because you don't know you're dead.
.....It's kinda the same when your STUPID.


I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.
Marv D is offline   Reply With Quote
Old 11-03-2013, 04:45 PM   #12
regan wilson
Senior Member
 
regan wilson's Avatar
 
Join Date: Mar 2008
Location: tyler texas
Posts: 1,536
Re: What about bags?

Marv that was a good post. Now give us some launch pics like the one in your YB avatar. The Chebby Too is cool!
__________________
NHRA Super Street 469C
It only runs 10.90 at 156 mph
regan wilson is offline   Reply With Quote
Old 11-03-2013, 09:54 PM   #13
Marv D
Registered Truck Offender
 
Marv D's Avatar
 
Join Date: May 2008
Location: hells training ground (aka Ariz)
Posts: 3,118
Re: What about bags?

Lol., here's the 'airtime' video that avatar photo came from I think.. she used to get up on the tire just a bit.

http://www.youtube.com/watch?v=0BDdg...ature=youtu.be

Man that is SOOOooooo hard on parts!
Sparks was a few gouges in the oil pan and header extensions. I had to try and stand the tires back up straight in the stock Chevy II front suspension after every race. (Hence the AJE strut front clip added in the pic above)
__________________
Still playin with trucks, even at my age!

When you're dead, it's only a problem for the people around you, because you don't know you're dead.
.....It's kinda the same when your STUPID.


I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.
Marv D is offline   Reply With Quote
Old 11-08-2013, 11:55 PM   #14
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
Re: What about bags?

Not sure if any of you have seen this thread, but I've been reading through it and gave me an idea for the adjustable coil overs up front. You guys think it will work for racing purposes?

http://67-72chevytrucks.com/vboard/s...d.php?t=266485
low&slow is offline   Reply With Quote
Old 11-09-2013, 05:07 PM   #15
tinydb84
Registered User
 
tinydb84's Avatar
 
Join Date: Jul 2009
Location: San Jose Ca
Posts: 2,871
Re: What about bags?

Anything can work with enough fab. Do you need to make adjustments? Are you planning on driving it on the street and need to preform really well at the track? It seems like a lot of work to me. You can also buy new springs that are longer and softer that will do the job and ride decently on the street.
__________________
David
Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991
My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985
Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557
Instagram: myfabguy
tinydb84 is offline   Reply With Quote
Old 11-12-2013, 09:40 PM   #16
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
Re: What about bags?

Quote:
Originally Posted by tinydb84 View Post
Anything can work with enough fab. Do you need to make adjustments? Are you planning on driving it on the street and need to preform really well at the track? It seems like a lot of work to me. You can also buy new springs that are longer and softer that will do the job and ride decently on the street.
Do I need to make adjustments, No not necessarily. Only adjustments I'd make is at the track. As for street driving, I may do that occasionally to shows, local cruise, or parade. I'm not concerned about how well it is on the street. I was just thinking that for street use I could some how lower the front a bit for looks and then at the track pick the front back up a bit so all the weight isn't so low to the ground in the front. I was thinking that if the front is lower than the rear at the track, then it'd take longer for the weight to transfer to the rear than if the truck was a little more level. If any of my jumbled mind makes sense.
low&slow is offline   Reply With Quote
Old 12-08-2013, 09:20 PM   #17
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
Re: What about bags?

Any more input?
low&slow is offline   Reply With Quote
Old 01-30-2014, 10:00 AM   #18
Wasted Income
Boosted Member
 
Wasted Income's Avatar
 
Join Date: May 2002
Location: Mackinaw, IL
Posts: 2,200
Re: What about bags?

My street truck ran high 11s on bags all the way around. How fast are you planning to go?
__________________
1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq
1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift
1964 Buick Skylark Twin TURBO 383 LS pro-touring project
2014 VW Passat TDI - Daily Driver
Turbo diesel
2015 Sierra Denali HD Duramax Turbo diesel
2016 Ford Explorer Sport - Twin Turbskis
2017 Polaris RZR Turbo
2014 Nor-Tech Center Console - Twin Supercharged Outboards

TURBO ALL THE THINGS!!
Wasted Income is offline   Reply With Quote
Old 01-30-2014, 03:31 PM   #19
low&slow
Account Suspended
 
Join Date: Jan 2009
Location: Kuna, Idaho
Posts: 1,046
Re: What about bags?

I want to get into mid 10's at the fasted, but I want to lift the front wheels off too just a little bit if possible with zero fiberglass
low&slow is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:30 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com