actually, softer springs is not his theory, if you ever felt the rear suspension on a calvert spring car, it has very little deflection, he doesn't tell anyone what his spring rates are, but they are around 250lb rate per spring, give or take depending on the car. my brother along with many other NHRA stockers use the calvert springs. (NHRA super stockers don't have to use a stock type suspension so they use ladder bars and 4 links) and there are calvert suspension cars that have run 60fts in the high 1.20's and low 1.30's with a 9 inch tire. I put the caltracs in my car a couple years ago with regular HD springs, last winter I put fiberglass mono's in my car from flex-form, I put a high arch 235lb spring in it, and I cant be happier, with a 29x9 goodyear radial slick (d4457) on and with a low gear c4 have run low 1.40 60fts all year. running a best of 10.55 at 126mph with a 1.402 60ft the only thing I would add is to run a good shock, I run the Koni drag shocks that are adjustable, but the Calverts are good also, there are others out the also, but for the money, the calverts are probably the best bet. Duane
Actually, Duane, it was exactly that when I talked to him after buying his bars for my truck. Somehow, the front spring bushings that shipped were too small and once that problem was recitified, we had a nice discussion on springs. Had to look it up, but that was Jan of 2001. Of course, things change with time, but that theory prolly wouldn't. At that time, he told me to run the softest spring possible without bottoming the suspension. BTW, John is a really great guy to talk (and do business) with, he overnighted the correct bushings even though I told him there was no hurry...
my conversations with john and his son when I put the caltracs in my car was that I didn't have enough rear spring in my car when it was rolling over on the right rear, tying the shock down on the left side on extension and preloading the right side were adjustments that john had told me were making up for a spring rate that was too soft. I have never seen anyone put a set of calvert split monos on their car that said the car got softer in the rear when they were done. maybe things have changed in the last 12 years on his suspension, but even the guy from flex-form told me that he doesn't sell springs with less then a 225 rate with a calvert, some as high as 275 depending on the car. Duane
It helps that Mavericks are light,so we don`t need heavy springs out back.About 3 wks ago I went to MIR & watched the stick guys race.There was a 70 something yr old guy there w/ a green Maverick,408 n/a,c4,9in w/ cal-tracs set up identical to my car,races there every wk,10.08 in the qtr. all day long.Red lighted on the last round & lost,but still a very impressive car indeed.
are you still using the cal tracks with the fiberglass springs? or are you flex-forms flex track system?
I am running the caltracs with my fiberglass monos, my brother had a set of calvert springs go bad on his D/S Firebird (stick car) another friend of mine had a set that had a bad spring on his big block nova, and some other NHRA stocker guys have had some of their cars start leaning and losing there adjustment as the springs started to lose some rate/or arch. The flex forms supposedly don't have a memory, and are suppose to be good forever. and they are only 8lbs a piece so I figured I would buy a set, they were not that much more than the calverts. I am very happy so far. Duane
I would be afraid of the springs cracking where the caltracks leverage down on it. I guess they can take it. Now I know what I'm doing for springs when the time comes
you tell them they are for caltracs and he puts an aluminum plate on the top of the spring where the aluminum roller contacs the spring. Duane
