Posted By: Georg
Caltracs and backhalfed axle? - 06/20/11 06:08 AM
Do anyone use combo like backhalfed rear axle and Caltracs with monoleafs or everybody going automaticly to 4-link when backhalf their car?
Caltracs and backhalfed axle?
Posted By: Guitar Jones
Re: Caltracs and backhalfed axle? - 06/20/11 12:29 PM
Personally I see no reason to use CalTracs if you're going to back half the car, I mean why would you?
Posted By: Dragula
Re: Caltracs and backhalfed axle? - 06/20/11 02:03 PM
Yes I do....Its a V code car and I will not cut it up further, at least for now. See link in my sig.
Or this link, what is the question?
http://s427.photobucket.com/albums/pp357/cudahalr/70HemiCuda/?start=all
Or this link, what is the question?
http://s427.photobucket.com/albums/pp357/cudahalr/70HemiCuda/?start=all
Posted By: Guitar Jones
Re: Caltracs and backhalfed axle? - 06/20/11 02:09 PM
But if you back half it you've already cut it up.
I can see running CalTracs for not cutting the car up, I have them on my Duster, it's an original 340 4 speed car with the only option being the over the roof tape stripe.
I can see running CalTracs for not cutting the car up, I have them on my Duster, it's an original 340 4 speed car with the only option being the over the roof tape stripe.
Posted By: cudadoug
Re: Caltracs and backhalfed axle? - 06/20/11 03:35 PM
If you HAD to have leaf springs, I'm sure it would work fine. But I'd be curious as to WHY...
Posted By: Georg
Re: Caltracs and backhalfed axle? - 06/20/11 08:08 PM
Quote:
If you HAD to have leaf springs, I'm sure it would work fine. But I'd be curious as to WHY...
Why not? What is bad about Caltracs? There are many guys out there who hit very fast times with skinny rear slicks with Caltracs. Why not trie them with backhalfed car? I just personally like this suspension and one thing less to buy (as I allready have this Caltrac full kit)
Or are there some reasonable excuse why not to use Caltracs?
Thanks!
Posted By: Guitar Jones
Re: Caltracs and backhalfed axle? - 06/20/11 08:14 PM
Yes there are very reasonable excuses not to use CalTracs.
1. They are OK on good tracks but hit and miss on marginal tracks. Mine would be very inconsistent in the late rounds at night. Same could be said for a very hot track, but on a well prepped track they worked great.
My four link goes down the track everytime regardless of the temp or time of day.
1. They are OK on good tracks but hit and miss on marginal tracks. Mine would be very inconsistent in the late rounds at night. Same could be said for a very hot track, but on a well prepped track they worked great.
My four link goes down the track everytime regardless of the temp or time of day.
Posted By: fasterdart
Re: Caltracs and backhalfed axle? - 06/20/11 08:19 PM
no reason to back half the car.we run 1.2x 60 ft times with cal tracs and 29.5x10.5 tire.dead consistant every time...the car runs 8.90s also.
Posted By: cudadoug
Re: Caltracs and backhalfed axle? - 06/20/11 08:28 PM
Okay, if you already own them and the springs I can see why you'd like to try them, don't blame you as even ladder bars and decent shocks are going to cost $1,000 here in the US.
That said, the bars themselves won't know WHAT they're on, a OEM subframe of a "back-half" deal...as long as they're installed correctly, they will do just as good of a job as they would on a non-back-half car.
DO IT and let us know what happens!
That said, the bars themselves won't know WHAT they're on, a OEM subframe of a "back-half" deal...as long as they're installed correctly, they will do just as good of a job as they would on a non-back-half car.
DO IT and let us know what happens!
Posted By: Georg
Re: Caltracs and backhalfed axle? - 06/20/11 08:29 PM
Quote:
no reason to back half the car.we run 1.2x 60 ft times with cal tracs and 29.5x10.5 tire.dead consistant every time...the car runs 8.90s also.
what horsepower we are talking?
Iam building Pro-Street class car and Iam more than sure that I cant get any grip with 10.5" tires in our slippy tracks. Also we trie to get Charger weight down a lot. Whole new floor (new firewall what is also moved back because of back moved location of motor and tubbed rear from right behind front fraim rails. Front fraim rails have to be original in this class, everything else can change
Posted By: fasterdart
Re: Caltracs and backhalfed axle? - 06/20/11 08:33 PM
car made over 1100 h.p.,stock front suspension,weighs 3330 w/me in it race ready.ou tracks around here are marginal at best...
Posted By: Guitar Jones
Re: Caltracs and backhalfed axle? - 06/20/11 08:37 PM
Quote:
no reason to back half the car.we run 1.2x 60 ft times with cal tracs and 29.5x10.5 tire.dead consistant every time...the car runs 8.90s also.
With what a traction controlled starting line limited turbo or a nitrous set up on a timer? Even my friends 3.9 V6 stocker Dakota has trouble from time to time. From personal experience I will tell you that CalTracs will never be as good or as consistent as a 4 link car, period. Sell the CalTracs, heck that whole setup is darn near $1000 here with the good shocks and buy a four link, you won't be sorry you did.
Posted By: fasterdart
Re: Caltracs and backhalfed axle? - 06/20/11 09:07 PM
car is n/a...we only pull 6 degres timing out on the hit for .2 sec...you gotta know how it works and you must have good front end travel.
Posted By: Guitar Jones
Re: Caltracs and backhalfed axle? - 06/20/11 09:26 PM
Quote:
car is n/a...we only pull 6 degres timing out on the hit for .2 sec...you gotta know how it works and you must have good front end travel.
I know how they work, I've had my Duster on the back bumper with them for 2 passes, third pass and it's on marbles. It's not the bars, it's the tracks. You must only run on very good tracks. Not all of us have that luxury.
Posted By: Dragula
Re: Caltracs and backhalfed axle? - 06/20/11 09:34 PM
Quote:
But if you back half it you've already cut it up.
I can see running CalTracs for not cutting the car up, I have them on my Duster, it's an original 340 4 speed car with the only option being the over the roof tape stripe.
Actually I didn't cut it up, its been that way since the early '70's and with as much tire as I run, its not an issue. With SS springs it was horrible. With mono's and caltrac's it leaves like a ladder bar car. No wind up, no lag, just gone.
On the other hand I have a G-code '72 Cuda I am working on, and it has the Caltrac's with mono's and stock wheel wells and I am strongly thinking of putting ladder bars on it. Smaller tire, I think ladders or 4-link is better.
Posted By: Quicktree
Re: Caltracs and backhalfed axle? - 06/20/11 09:53 PM
Quote:what track do you race at?Quote:
car is n/a...we only pull 6 degres timing out on the hit for .2 sec...you gotta know how it works and you must have good front end travel.
I know how they work, I've had my Duster on the back bumper with them for 2 passes, third pass and it's on marbles. It's not the bars, it's the tracks. You must only run on very good tracks. Not all of us have that luxury.
Posted By: maximum entropy
Re: Caltracs and backhalfed axle? - 06/20/11 10:55 PM
i would go with the 4 link when backhalfing just because it takes so much more fabrication, which is really fun. then you end up with a suspension that is ubber adjustable.
Posted By: Guitar Jones
Re: Caltracs and backhalfed axle? - 06/20/11 10:58 PM
Quote:Quote:what track do you race at?Quote:
car is n/a...we only pull 6 degres timing out on the hit for .2 sec...you gotta know how it works and you must have good front end travel.
I know how they work, I've had my Duster on the back bumper with them for 2 passes, third pass and it's on marbles. It's not the bars, it's the tracks. You must only run on very good tracks. Not all of us have that luxury.
Mostly at Orlando Speed World, it's OK most times but others times, especially late at night it's not. That particular time I described was the Gamblers race at Silver Dollar after the division finals. I race some of the outlaw tracks too like Lakeland and CFRC been to Moroso, Bradenton, Gainseville many are nice tracks some not so.
I had to let out of it with the wheels in the air during the King of the Track night at Speed World one year, I was about to take out the tree and the motorcycle in the other lane. Car was fine up to that point but it was about 2am. Like I said on a good track they work, on a marginal track it's hit and miss.
Posted By: fasterdart
Re: Caltracs and backhalfed axle? - 06/20/11 11:28 PM
our tracks are marginal at best,nice tracks are a luxury.but trust me,we dont run on many...
Posted By: 64hemi330sedan
Re: Caltracs and backhalfed axle? - 06/21/11 04:34 AM
my 65 is backhalfed and i have cal trac's.when i bought the car it was a cobbled up old race car.the frame rails were sawed in half to make room for the 14x32 tires.it was a mess.so i backhalfed it and put 33-21.5 mickeys on it and put leafs on it beacuse i wanted to street drive it.looking back i wish i would have put a 10.5 tires and a ladder bar on it.it has never sixty footed as well as it did with 002-003 s/s springs.but it is way more consistant in the sixty foot with the cal-trac's.with the s/s spring it either hooked or spun.even on a marginal track its never more than three or four numbers off with the cal-trac's.
Posted By: Georg
Re: Caltracs and backhalfed axle? - 06/24/11 06:36 PM
thanks guys for answers. I have some questions more for you.
As I am going to make tubular chassie except front subframes there are many sides how to get best weight transfer, instant centre etc. This is all new stuff for me and I hope here is somebody who can lead me into right path. (I still going to use Caltracs in this project) I mean-explain how and why should I do this and this. Is there some good calculators what can help me?
As Iam going to make new firewall and floor also then Iam able to move motor quite a lot behind and so on...but how much is enough, what should be motor height? Is better to lower or raise motor with tranny etc. As you see, lot of questions (hopefully not too dumb ones)where I need help and hope to get answers. As this is not easy project then I want to make it work first time
I also trie to lower whole car as much as possible
As I am going to make tubular chassie except front subframes there are many sides how to get best weight transfer, instant centre etc. This is all new stuff for me and I hope here is somebody who can lead me into right path. (I still going to use Caltracs in this project) I mean-explain how and why should I do this and this. Is there some good calculators what can help me?
As Iam going to make new firewall and floor also then Iam able to move motor quite a lot behind and so on...but how much is enough, what should be motor height? Is better to lower or raise motor with tranny etc. As you see, lot of questions (hopefully not too dumb ones)where I need help and hope to get answers. As this is not easy project then I want to make it work first time
I also trie to lower whole car as much as possible
Posted By: Guitar Jones
Re: Caltracs and backhalfed axle? - 06/24/11 06:41 PM
Well as far as I am concerned you are already starting off with a handicap, so I can't help you.
Posted By: Georg
Re: Caltracs and backhalfed axle? - 06/25/11 07:18 AM
well...seems Iam on my own then huh?
Posted By: dennismopar73
Re: Caltracs and backhalfed axle? - 06/25/11 01:28 PM
you are allowed 10% of wheel base, try not to go all the way,
also , make youre tunnel bigg enough so you dont have to get long ext and ratchets to get trans bolts out,
also dont want to go back to far on the motor might have to get into the windshield ?
as for how high./low the motor get , depends on where the rear sits, and angle of trans, never want the trans to go uphill, 0 or 2% down (really dont like 0), this is dictated by what ride height or stance you want to achieve?
my motor is moved back 7" less than 10%, but my motor is as low as i can go without the trans up hill, and my oil pan,
i cut up my k memeber is all i use is the bars i have an open area except for the rack/pinion,
good luck
also , make youre tunnel bigg enough so you dont have to get long ext and ratchets to get trans bolts out,
also dont want to go back to far on the motor might have to get into the windshield ?as for how high./low the motor get , depends on where the rear sits, and angle of trans, never want the trans to go uphill, 0 or 2% down (really dont like 0), this is dictated by what ride height or stance you want to achieve?
my motor is moved back 7" less than 10%, but my motor is as low as i can go without the trans up hill, and my oil pan,
i cut up my k memeber is all i use is the bars i have an open area except for the rack/pinion,
good luck
Posted By: MR_P_BODY
Re: Caltracs and backhalfed axle? - 06/25/11 01:47 PM
Quote:
thanks guys for answers. I have some questions more for you.
As I am going to make tubular chassie except front subframes there are many sides how to get best weight transfer, instant centre etc. This is all new stuff for me and I hope here is somebody who can lead me into right path. (I still going to use Caltracs in this project) I mean-explain how and why should I do this and this. Is there some good calculators what can help me?
As Iam going to make new firewall and floor also then Iam able to move motor quite a lot behind and so on...but how much is enough, what should be motor height? Is better to lower or raise motor with tranny etc. As you see, lot of questions (hopefully not too dumb ones)where I need help and hope to get answers. As this is not easy project then I want to make it work first time
I also trie to lower whole car as much as possible
As far as moving the engine back... try to get it at
least 50/50 on the weight(up to 48/52) as for the
height of it.. it will still be 50/50(or what ever
you build it at) BUT if the engine is higher in the
chassis it is closer to the CG height and is easier
to transfer the weight to the rear... what makes the
difference on the height is the amount of torque
the engine will make... higher amounts keep it low
Posted By: Georg
Re: Caltracs and backhalfed axle? - 06/26/11 03:09 PM
thanks guys.
I start with front K-frame and keep you posted.
What about front stabilizer bar? How unstable car is going to be without it?
One plan is to leave original control arms (maybe modify them and make them lighter), remove torosion bars and use 2-way adjustible front shocks
I start with front K-frame and keep you posted.
What about front stabilizer bar? How unstable car is going to be without it?
One plan is to leave original control arms (maybe modify them and make them lighter), remove torosion bars and use 2-way adjustible front shocks
Posted By: MR_P_BODY
Re: Caltracs and backhalfed axle? - 06/26/11 03:21 PM
Quote:
thanks guys.
I start with front K-frame and keep you posted.
What about front stabilizer bar? How unstable car is going to be without it?
One plan is to leave original control arms (maybe modify them and make them lighter), remove torosion bars and use 2-way adjustible front shocks
If this is a drag car you dont want the front sway bar
it tends to slow movement in the frontend