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A lot of improvement over leafs or caltracs would mean those two types of set ups were not very optimized if the car is slower than about 11.00, and caltracs should be good at better ETs than that. But I definitely recommend going to ladderbars over either. They will work well for you down into the eights. They are the lightest of the three I believe. Also very easy to adjust. I run ladder bars and at 8.90s can run several passes in a row with 60 fts all within .005.

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Ok, let me ask this. Anyone running M/T 31 x 10.5 W with a 10 or 12 inch wheel just with mini tubs? Did you have to cut the outside wheel tub (closest to quarter panel skin)?

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Couple of facts about the current car from this past year.
3670 lbs 46.5% rear weight. (no weight in trunk)
Caltracs running .05 gap. Rancho shocks work best at 3-5. Have to hit the tire HARD
Front end travel is 5.5 inches and it’s very loose.
30x9 Hoosier DO5 slick on an 8” rim. Have 1/4-3/8 clearance each side before rubbing. Tire psi works best at 12.5 no tubes.
505 cubes, 640 roller .272 @ .050 with Rick Allison cross ram
Low gear set with 4.10 gears.
On a new good tire it 60 foots 1.44 /1.47 – that goes away after about 35 runs
Car runs 10.5’s

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Using the Wallace calculator,,,for your car,,running 10.50's,,it predicts a 60' of 1.44-45 ( seems close to what you posted )

http://www.wallaceracing.com/calc60ft.php

The calculator is pretty spot on for my car ,,,and ET.

I run Caltrac's ,,, and keep chipping away at my ET with weight loss, shocks, convertor adjustment, carb squirters, timing, tire pressure, etc,,,and have been able to get from a 10.26 down to a 10.04,,,and the 60' improves as my ET improves,,,1.43-44,,,down to a 1.39-1.41
(451, solid cam, Edelbrock RPM heads, dominator, 456 Dana, 31 x 10.5 tire/tubes, caltracs, ranchos, etc)

good luck with the car,,,ps,,,GREAT pic in the original post,,,wheels up,,,





Doug

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I can't argue with the results you guys get with ladder bars but to me, and this is only my opinion, if you are going to go through the work and expense of putting in ladder bars why not just four link it? It's only a few hundred dollars more and you have an infinitely adjustable suspension.

I mulled this over for many months, talked to a few chassis builders, and most of them said the CalTracs would be preffered just because of the adjustability. I put CalTracs on my Duster only because it's an original 340 4 speed car with
rare and few options so I didn't want to cut it up. So when I decided to get serious I built a 4 link car out of a mundane run of the mill 318 car I got out of a junk yard.

Again just my YMMV.

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Couple of facts about the current car from this past year.
3670 lbs 46.5% rear weight. (no weight in trunk)
Caltracs running .05 gap. Rancho shocks work best at 3-5. Have to hit the tire HARD
Front end travel is 5.5 inches and it’s very loose.
30x9 Hoosier DO5 slick on an 8” rim. Have 1/4-3/8 clearance each side before rubbing. Tire psi works best at 12.5 no tubes.
505 cubes, 640 roller .272 @ .050 with Rick Allison cross ram
Low gear set with 4.10 gears.
On a new good tire it 60 foots 1.44 /1.47 – that goes away after about 35 runs
Car runs 10.5’s

---

Using the Wallace calculator,,,for your car,,running 10.50's,,it predicts a 60' of 1.44-45 ( seems close to what you posted )

http://www.wallaceracing.com/calc60ft.php

The calculator is pretty spot on for my car ,,,and ET.

I run Caltrac's ,,, and keep chipping away at my ET with weight loss, shocks, convertor adjustment, carb squirters, timing, tire pressure, etc,,,and have been able to get from a 10.26 down to a 10.04,,,and the 60' improves as my ET improves,,,1.43-44,,,down to a 1.39-1.41
(451, solid cam, Edelbrock RPM heads, dominator, 456 Dana, 31 x 10.5 tire/tubes, caltracs, ranchos, etc)

good luck with the car,,,ps,,,GREAT pic in the original post,,,wheels up,,,





Doug

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Spencer,
I am not too familiar with the RacePak,,but might do some research on it,,,do you find it helpful for dialing in the car,,,and diagnosing some issues ? Might pm you sometime and ask some questions on it if you dont mind.

Which system do you use ???

I dont know anyone locally that uses it,,,but am always looking for stuff to get my car working better...

Glad the fan and pump worked out....

Doug

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Its GREAT. I use the RacePak Sportsman data acquisition system. Yellow Bullet forum has some really good info and help with the RacePak stuff.
No more guessing on what the car or I am doing. I’ve learned a lot from it. It really helps me understand changes and their effects. Some of the best $ I’ve ever spent on the car.
PM me if you want to discuss more


thought it was just us Wisconsin guys