Caltracs question

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From your vary first post you said "you installed new shock all the way around". SS spring require a longer shock then stock.
You said that they worked good untill your ET got better(Making enough power to bottom out the rear shock now????)
Lowering blocks would help the shock issue, but so would a good adj rear shock.

And then after you have all that done, clamp the front segment of the leaf spring!

Those SS Spring can hold up to way more then 12sec passes..........................
Sure caltrac will work too...........But it will cost u a lot less $$$$ to tune up what you already have.

Buying a good set of adj shock are a lot more money than a standard shock for sure, But Caltrac is going to tell you that "there" won't work properly without them............So even if you decide to go with Caltracs latter on, your bill will be less to convert.
You know they're going to recommend a 90/10 or better, up front.

By the time you have added all the extras that is required to run a caltrac, I bet you will be vary happy with the SS Spring you already have.
 
Spot on, at 12 secs there's absolutely no need for caltracs whatsoever, its the easy way. My mate has always ran SS springs on his '69 Dart 440, ran 10.1's@132, both wheels 4" inches up equal amounts, the answer is good shocks, track time in setting it all up is all thats needed. Christ I ran 11.0/122 1.54 60 on stock springs clamped at front, a p/snubber and long shocks back in 1986.
 
Cudafever said:
From your vary first post you said "you installed new shock all the way around". SS spring require a longer shock then stock.
You said that they worked good untill your ET got better(Making enough power to bottom out the rear shock now????)
Lowering blocks would help the shock issue, but so would a good adj rear shock.

And then after you have all that done, clamp the front segment of the leaf spring!

Those SS Spring can hold up to way more then 12sec passes..........................
Sure caltrac will work too...........But it will cost u a lot less $$$$ to tune up what you already have.

Buying a good set of adj shock are a lot more money than a standard shock for sure, But Caltrac is going to tell you that "there" won't work properly without them............So even if you decide to go with Caltracs latter on, your bill will be less to convert.
You know they're going to recommend a 90/10 or better, up front.

By the time you have added all the extras that is required to run a caltrac, I bet you will be vary happy with the SS Spring you already have.
Click to expand...
My old duster was made to run 11.000 it did so with just super stock springs and it is a very consistent car. Kim
 
D-50394 said:
I don't understand why you don't just put lowering blocks under it. The fastest leaf spring car in the country has lowering blocks under it. Ron Rhodes has run a 4.40 in the 1/8 with them.
Click to expand...

Thought I'd post an update among all the chatter!

Installed 1" lowering blocks and 90/10s on the front ... made 6 runs at same track in better weather and 60' ranged from 1.81 to 1.838. My best previous 60' was 1.770. :mad:

Best run of the day was 12.521 @ 109 w/ 1.81 60'
 
OK a little bit more info,......power loss at 60? slip and grip at 60, blowing the tires off at the hit.
Got any one able to video you launch.
 
Cudafever said:
OK a little bit more info,......power loss at 60? slip and grip at 60, blowing the tires off at the hit.
Got any one able to video you launch.
Click to expand...

None of the above. Felt the same and my dad said it looked great off the line. I'm going to get him a camera for next time to do video. Unfortunately that won't be until next year out here on east coast, dammit. Outside of it falling off in 60' it ran flawless. Does that range of 60' sound good over 6 runs? I thought it was a little wide but have nothing to go by. Not too disappointed as we went to fourth round in our first time racing.
 
Video would help to see what is going on.
If you're 60' keep decline, and you're not slipping off the line........could be a converter going away.
 
Just saying I already had the the leaf springs moved in on my demon and the assassin set up was to wide. Sure didn't want to redo the box and make it wider! So whoever is buying assassin stuff make sure u get the dementions of how wide they are before u buy them. I will say they are really a nice quality piece. I ended up going back to cal tracs. Hope I don't bend the bars or break ****! Lol best et 9.08 148 mph 1.31 60ft.
 
I'm guessing your weight to be 3300?......at 347 fly hp on the day =
60 Foot E.T. : 1.72
1/8 Mile E.T. : 7.79
1/8 Mile Trap Speed : 87.29
1/4 Mile E.T. : 12.34
1/4 Mile Trap Speed : 109
according to Wallace, or>
332hp
60 Foot E.T. : 1.74
1/8 Mile E.T. : 7.90
1/8 Mile Trap Speed : 86.02
1/4 Mile E.T. : 12.52
1/4 Mile Trap Speed : 107
____
60 Foot E.T. : 1.81
1/8 Mile E.T. : 8.20
1/8 Mile Trap Speed : 82.88
1/4 Mile E.T. : 13.00
1/4 Mile Trap Speed : 103
 
I've been the best of 1.66 60ft with a very mild 360. This is with SS springs and lowering blocks. Make sure you have 5 inches of travel in the front end. No need to spend the money on caltracts
 
60fts in the 1:80s are pretty slow, definitely no need for calltracks. Sounds like other problems.
 
replicaracer43 said:
60fts in the 1:80s are pretty slow, definitely no need for calltracks. Sounds like other problems.
Click to expand...
my old hemi car went 10.40 w/ 002-003 super stock springs. they moved the B body rear- forward because the front of A body springs are shorter. too bad we didn`t have decent tires back then! I have a cal trac set up on my 68 barracuda, and a set of 002-003 springs w/ imperial shocks. not sure which I`ll end up running. the caltracs seem to ride rough so far./
 
Hot Metal said:
I'm guessing your weight to be 3300?......at 347 fly hp on the day =
60 Foot E.T. : 1.72
1/8 Mile E.T. : 7.79
1/8 Mile Trap Speed : 87.29
1/4 Mile E.T. : 12.34
1/4 Mile Trap Speed : 109
according to Wallace, or>
332hp
60 Foot E.T. : 1.74
1/8 Mile E.T. : 7.90
1/8 Mile Trap Speed : 86.02
1/4 Mile E.T. : 12.52
1/4 Mile Trap Speed : 107
____
60 Foot E.T. : 1.81
1/8 Mile E.T. : 8.20
1/8 Mile Trap Speed : 82.88
1/4 Mile E.T. : 13.00
1/4 Mile Trap Speed : 103
Click to expand...

So what is all of this saying? to you, and to chillent?
 
I will say the lowering blocks did not have anything to do with your slower 60 ft. In my Demon I had a best 60 ft. of 1.36 with SS springs and 2 inch lowering blocks. That was on a 100 shot of NOS.
Demon 2 001.jpg
 
Cudafever said:
So what is all of this saying? to you, and to chillent?
Click to expand...

Better weather on the day = more hp, 90/10's upsetting the rear some, too loose, launch, stop and go = slower 60's, enough hp to go in the 3's on the day?......just showing numbers and figures of a car that leaves relatively hard as a guide.
 
Hot Metal said:
Better weather on the day = more hp, 90/10's upsetting the rear some, too loose, launch, stop and go = slower 60's, enough hp to go in the 3's on the day?......just showing numbers and figures of a car that leaves relatively hard as a guide.
Click to expand...

Ahh, Ok, got yah.
 
Hot Metal said:
I'm guessing your weight to be 3300?......at 347 fly hp on the day =
60 Foot E.T. : 1.72
1/8 Mile E.T. : 7.79
1/8 Mile Trap Speed : 87.29
1/4 Mile E.T. : 12.34
1/4 Mile Trap Speed : 109
according to Wallace, or>
332hp
60 Foot E.T. : 1.74
1/8 Mile E.T. : 7.90
1/8 Mile Trap Speed : 86.02
1/4 Mile E.T. : 12.52
1/4 Mile Trap Speed : 107
____
60 Foot E.T. : 1.81
1/8 Mile E.T. : 8.20
1/8 Mile Trap Speed : 82.88
1/4 Mile E.T. : 13.00
1/4 Mile Trap Speed : 103
Click to expand...

Thanks for all the input guys ... yes, car weighs 3311. I've used the wallace calculator and that's what is frustrating! What should a good range of 60' be over 6 runs? 1-2 hundreths???? Less???

I am thinking I'm pushing the limits of my tires (10 yr old M/T drag radials) and my Auburn diff .... spool and new tires for spring and see how 60' responds
 
chillent said:
Thanks for all the input guys ... yes, car weighs 3311. I've used the wallace calculator and that's what is frustrating! What should a good range of 60' be over 6 runs? 1-2 hundreths???? Less???

I am thinking I'm pushing the limits of my tires (10 yr old M/T drag radials) and my Auburn diff .... spool and new tires for spring and see how 60' responds
Click to expand...

I found 7 old et slips from 1990 from my big tyre (Hoosiers) '69 440 Cuda....11.0's with current set up at the time, 60's were>
1x1.62 at a T&T
3x1.58's race meet
1x1.56 race meet
2x1.55's race meet
all at Santa Pod, all a bit off from the 1.54's or better that they should've been, the car didn't leave hard with 4.5psi we ran in them days in that size tyre.
 
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Car is SLOW in the 60's and 1/4 if running 109mph. Was a complete timeslip posted? That would help a bit in seeing where it's falling off.

109 is real close to 12.00-12.15 range if 1.70 or better 60's are there. It's got a decent setup, still at least .1 off in 60's. Chip away doning one change at a time. I'd start with fresh tires, MT radials aired up in the 18-23 range and go from there.

There is no need for cal tracs on a 12.00 car unless you want to spend money on them. Plenty of cars run just fine on leaf springs much faster.
 
crackedback said:
Car is SLOW in the 60's and 1/4 if running 109mph. Was a complete timeslip posted? That would help a bit in seeing where it's falling off.

109 is real close to 12.00-12.15 range if 1.70 or better 60's are there. It's got a decent setup, still at least .1 off in 60's. Chip away doning one change at a time. I'd start with fresh tires, MT radials aired up in the 18-23 range and go from there.

There is no need for cal tracs on a 12.00 car unless you want to spend money on them. Plenty of cars run just fine on leaf springs much faster.
Click to expand...

image.jpeg
 
famous bob said:
10 yr old tires , think you`ve got ur answer.
Click to expand...

I agree.

The set up is soft in the first 330. It's basically .1+ off at 60' and .2 off at 330/660
Converter, tires, ignition timing, chassis, launch methods all come into play.
It's not lacking power as it's running out the back strong. :thumbsup:
Picking up 22 MPH in the back half compared to most cars at 87 picking up about 20 mph.
 
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