Visit The Dirt Forum for More Information

Author Topic:   building a car - help with rear suspension choice
m33mcg
Dirt Forum Racer

Total posts: 96
posted September 03, 2004 09:16 PM  
I would like to ask a question to those of you who understand and know more about suspension design than I do.

I am building a super street/ limited late model for next year. I am using a older GTR Late model chassis and will stub it with a Camero front stub. My rule due not allow coil overs,aluminum shocks,and at the other track no torsion bars or sliders.
We must use the G60 tiers with a 360cid 2barrel carb.

If you could design/ build a rear suspension what would you do? and why?

Thanks for all your help, Mike

mod70
unregistered Total posts: 96
posted September 03, 2004 11:41 PM           send a private message to m33mcg   Edit/Delete Message   Reply w/QuoteBBBBBB
3-link: if you're new to bar cars and/or you are driving on heavy tacky tracks. The 3-link is eaiser to learn to adjust, as well as being more forgiving if you are a bit off.

4-link or 4/z: if you're experienced with bar cars, or driving dry/slick tracks. The 4-bar combinations get more suspention travel and can have more forward bite than a 3-link, but you can dial yourself out of the race real quick if you are off.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted September 04, 2004 10:14 AM  
3 link is simplest so easy to tune.
i would go 4 link lr with clamped in front, with cups so you dont have a slider or coil over or any binds, and then on the rr i would put on a swing arm with the spring on the front lower link, z link style swing arm.
this would be the fastest set up to run on it.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted September 04, 2004 10:16 AM  
are you buiiding a grand national?

m33mcg
Dirt Forum Racer

Total posts: 96
posted September 04, 2004 11:38 AM  
yes, what do you mean clamped? do you know of any pics or drawings of this setup. Ineed to you what these parts look like.
thanks, mike

zeroracing
Dirt Forum Champ
Total posts: 1875
posted September 06, 2004 11:26 AM  
if you go to lakeside alot look at some of the mods and ask them. the 1k mod car runs clamped lr all the time. and is a great guy no matter what others may say. he would show you what a clamp bracket is.
he also runs no sliders on his mod.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted September 06, 2004 11:32 AM  
build it to run any suspention, 4 link both sides, z link both sides anthing

zeroracing
Dirt Forum Champ
Total posts: 1875
posted September 06, 2004 01:51 PM  
when people say clamped up it means that you run the spring in front of the rearend housing(can do it behind also but different effect). the spring is solidly mounted on the rearend housing not on the birdcage. it makes the car load the spring when you get on the gas(if the spring is in front).
this will work good for a grand national car. also the rr i would put as swing arm, with the spring on the lower forward link, and then just put like 0-15 deg angle(downward to back). in the backward bar.

m33mcg
Dirt Forum Racer

Total posts: 96
posted September 06, 2004 07:00 PM  
That makes sense, thanks. I am thinking of building the car for Thunder Hill & run Lake side once in a while. I am now thinking about running a mod, there seams to be more used cars and parts available that fit the mod rules than the grandnationals. I was worried about the cost of the mods, but it looks likes to make the grandnational competive the cost will be about the same.
Thanks the input guys.
Mike

zeroracing
Dirt Forum Champ
Total posts: 1875
posted September 06, 2004 07:13 PM  
hey mike, they both will cost about the same to run as long as you dont plan on running lakeside in a mod, it will take a large motor to keep afloat there. your best bet would be thunder on sat and tow just a liittle further than lakeside to grain valley, it will be a great place to learn at.

Back to the Archives