Yes Rick, as I said in the first post, I would get a set of slicks smaller diameter than the street tires. I'm not that dumb.Originally Posted by Rick_L
I don't understand why 31" tires won't fit? The only hard part is getting them on and off. Once on they have plenty of room. The one set of tires I had, I had to jack it up by the frame, then put a small bottle jack between the rear and the arch in the frame and jacked the axle down to get them on. A bit of a hassle but it worked.
I don't think 31" tires will fit unless you move the axle rearward 1" or so. The tires will rub at the rockers. Besides, you're talking about a tiny change in RPM at a given speed, and as Rick said you'll negate some of the advantage of going to a lower gear. You really need an OD tranny to get good street/strip performance and still cruise the highway.
56 Nomad, Ramjet 502, Viper 6-speed T56, C4 Corvette front and rear suspension
Other vehicles:
56 Chevy 2-door BelAir sedan
56 Chevy 210 4-door sedan
57 Chevy 210 4-door sedan
1962 327/340HP Corvette
1961 Willys CJ3B Jeep
2001 Porsche Boxster S
2003 Chevy Silverado 2500 HD Duramax
2019 GMC Sierra Denali Duramax
Based on my experience, 30" is the maximum tire diameter unless you move the tire/wheel inboard enough to clear the corner where the rocker panel meets the wheel cutout. And if you do that, you have to worry about clearance to the wheel tub in that general area.
OK thanks! Now I know where to look to see what you mean. And my rear by mistake happens to be 59". I had tires that rubbed the shackle on the leaf spring, so I cut off the outside edge of the shackle. They never rubbed in the wheel well.
And while I'm at it, is there a fairly easy way to move the rear back? My driveshaft is actually on the long side anyway. Is there a way I can drill a new hole through the springs to move the center bolt rear? Certainly not with any drill bits I have.
Last edited by 55 Tony; 12-20-2017 at 06:11 AM.
4 Speed or auto a street strip 454 will respond to a good converter more than a gear change if auto. 4 speed a whole different animal.
It's th400 with a tci 240900. Supposed to be about 1000rpm over stock. I'll go one step at a time and first see what it does with slicks.
Cam http://www.compcams.com/Company/CC/c...?csid=436&sb=0 Without slicks it has far more low end than can possibly be used. Guessing at 10.5:1 compression. Cranking compression is 205 - 215.
Another newbie to slicks question ... do I have to screw them on? Or just mount them.
If you are going to run less than 15 psi screw them for sure . Never a bad idea.
A good 10 inch 3500 convertor with your 342 gears would out preform yours with 4.11s.
Not knowing what tranny, 1st-2nd gear ratios, tire diameters, trap speed, etc. there is no way to give a good idea as to the best setup for your goal. If running an auto, a better plan is a 4 speed for sure, and run closer to the same size tire for track or street. Need to come up with a combo that gets the most out of 2nd gear I would think. Running a non-overdrive 1:1 trans will always be a compromise no matter how you slice it, unless you have a quick change rear, which I have. I can pick from like a 100 different ratios, that can be changed in 20 minutes. This is a 1974 Frankland with a 4:86 10 1/2 inch ring gear with a locker. I get a great launch with a 5:42 gear with a wide ratio 4 speed Muncie. 14.3:1 in 1st gear. I paid $600 for it, and all the different gears are like $70 each. camera phone 358.jpg
Last edited by 55 Rescue Dog; 12-20-2017 at 03:23 PM.
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