Finally got to run 5speed richmond 1 year after twisting 12 bolt and damaging driveshaft and mainshaft! Got down to 12.4 e.t. with 1.77 60ft. Combo is 9.8 C.R. 420 h.p. 327 4.10 rear,and ram 3000lb. metallic 6000 series disc. V8 springs 90/10 and slapper bar 50/50 in rear WITH 26X9 ET. DRAGS. Leaving line between 4500 and 6000 Rickster sees rear falling out with big body seperation unplanting tires actually coming off pavement 3"!!!!!! Not sure if adjustable rancho shocks(30/70) ,LESS CLUTCH,or more front end travel with a 6 cyl. spring would eliminate problem. Like to get 60 footer to 1.65!! Old combo with 2.20 muncie and centerforce dualfriction did not have this problem with 1.76 60 footer. Richmond 5 speed has 13.5 starting line ratio and muncie was 10.0!! Any experiences or recommendations would be greatly appreciated as always. 66 NOVA 3350LB. THANKS MUCH, AL

just a sugestion now ,power glide and 4500 hundred stall should put in the 1.50 60ft range

Congrats on getting back to the drags.

I'm not sure that I really follow what the issue is.

Normally when someone says they are getting body separation that means they are pushing/ "planting" the rear tires hard into the pavement. Yet you say this is causing the tires to become unplanted by 3"? Maybe you are trying to say that the tires plant real hard then bounce back up toward the chassis? - which would be like wheel hop. If this is the case then further chassis setup should make it right. If you are only, or mostly, experiencing just rear body separation with no front end lift then that is a problem. If you are still running a front sway bar remove it. Then check front end travel by jacking it up to see what limits the travel - sometimes you need to trim back the snubbers or do some other grinding/clearancing. You may need different shocks or other work. If you are not already doing the "shock nut trick" then give it a try too: instead of cinching down the top shock nut tight against the bushings, lock the nut in place at the top of the shock nut stud - leaving about 1" of free top shock stud movement before it hits the shock nut stud bushings.

Thomas

i will tell you what i have it is almost like yours except more motor and a glide .sixty fts are 1.54 to 150s depending on track.28x9 slicks on 8 inch wheels compition eng fram conectors with springs moved in 3 inches comp traction bars adjusted up to the springs ,no slop on the front 50 /50/ shocks on back 90/10s on front with six cyl springs i do have cables on the front end for traval limiters to help keep from braking shocks although i have though about disconecting them and try loosing the shock nut as was stated .i do have several racing buddys that do sixty ft better but most have ladder bars

Duece,
I am watching closely to see how you make out. I personally think you have way too much rear gear. I am figuring on 3.31's with the Richmond 5 speed in my Chevelle. Use the first 4 gears at the strip and then pop it into fifth for the drive home. I think I figured that the Nash with a 3.31 rear is about the same as the M20 with a 4.30 or so rear, depending on which Nash you buy.
If yours is the 3.28 low gear you are actually at 13.44 to 1 in first gear. Thats like a M21 or 22 with 6.10 gears :eek:

Bill i do have the 3.27 1st and use the 4 gears at track crossing line at 7200rpm. Use 5th as overdrive on highway in a sense. Tried leaving between 4500 and 6000 with 4500 being best. Trying rancho adjustable rear shocks this week to slow down rear body seperation and hopefully give front a chance to transfer some weight and furthermore slow body lift at rear! I think springs and or shocks maxed out and this may have jerked tires off pavement!!!!!!?????? Also try to launch at 3500 and see if 60 foot does not slow down. Will let you know results Sunday . thanks again AL

Duece,
Not to doubt you but .... 7200 rpm with 4.10 gears and a 26" tire comes out to 135 mph ??? Thats low 10 second ets ?? Are you sure your tach is correct ?

Bill, Doesn't the Richmond have a 1.24 4th gear ratio? If he was at 7200rpm with a 26 inch tire and a 1.24 4th, it would come out around 110 mph, I think.

Tom

WHOA. Can't answer your question directly, but that is a ridiculous amount of rear gear.

Richmonds can be had in various combinations of gears. My unit has a 1.30 4th.

Steel clutch discs are nice race pieces , but tend to hit hard enough to break trannies. It is quite possible it's too much clutch? Do you still have the CF DF, and is it 26 spline?

Bill, I think you'll find that 3.31s are a fine rear gear for your Richmond. With 25.5" slicks, I'm in 4th just enough before the stripe to cross at 6600rpm, at peak HP. Perfect gearing for my combo.

TW,
YOur right, I must have been past my bedtime last night ! Still think its too much gear though.

Ran car again yesterday with new shocks (rancho adjustable) and eliminated tires bouncing off ground but still had body seperation! Went same 12.4 at 109 with 60ft 1.77 . Now for second round went against my rule of thumb (1 change at a time) and ended up making 3 changes!!! Jetted up primary 3 steps on 750 mech. to 76/84 ,bumped timing2 degrees to 37,and left air cleaner off which i never really beleived in. Now car runs 12.5 at 111 mph with slow 1.98 60 ft. I LIKE mph change and think changes were helpful but think the 3000lb. diaphram plate and 6 paddle mettalic disc are hitting tires too hard. Am thinking back to centerforce dual friction or adjustable setup may be best bet for the 1.68 60ft. and 11.99 times i am looking for.Any opinions on this are always appreciated as always!! thanks again,AL