Chassis stiffening
#2554172
09/24/18 06:17 PM
09/24/18 06:17 PM
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Joined: Sep 2018
Posts: 257 NC
70charger512
OP
#1 Thread Starter
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OP
#1 Thread Starter
Joined: Sep 2018
Posts: 257
NC
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If im looking at a b body with around 540 hp and 600 ft lbs MAX (at the flywheel), street tires, and 3.73 gears, what chassis stiffening would be necessary? Im thinking of at least torque boxes and possibly subframe connectors, would anything else be needed? Also, other than rear end (probably putting a dana in) what else would i need to strengthen my car?
Last edited by Nick Stevanovski; 09/24/18 07:39 PM.
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Re: Chassis stiffening
[Re: 70charger512]
#2554175
09/24/18 06:27 PM
09/24/18 06:27 PM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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Put in all the boxes and floor plates, weld in subframe connectors, full tube thru the floor are the best IMHO, pull the K frame weld that up, gusset the steering mount, box in the motor mount towers, lower rad support, and side firewall braces are nice additions, improve the welds thru out the unibody, shock towers, rockers, rear rails/floor, transmission crossmember...
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Re: Chassis stiffening
[Re: GoodysGotaCuda]
#2554270
09/24/18 10:44 PM
09/24/18 10:44 PM
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Joined: Dec 2003
Posts: 22,696 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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Go with through-floor frame stiffeners, I sure wish I did. I'm not impressed with the laser cut rigidity. As a back handed compliment, I would have thought you knew better.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Chassis stiffening
[Re: 70charger512]
#2554340
09/25/18 02:33 AM
09/25/18 02:33 AM
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Joined: Mar 2007
Posts: 3,277 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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From my limited experience with these cars, torque boxes, subframe connectors and a welded & reinforced K-member work wonders. Under fender braces & under radiator support significantly helps stabilize the front end. Add a custom Monte Carlo bar to finish it off and further eliminate cowl shake.
Welding up the rest of the car's unibody welds as mentioned, helps too. It all adds up, and it really helps if you start with a relatively rust free low mileage unbeaten car.
Some upgraded control arms, HD tie rods & sleeves, sway bars bigger torsion bars, stiffer springs and quality shocks will make that stiffer chassis pay off.
Beef up your driveshaft, u-joints and attachments to the rear end and transmission.
If you don't live where it freezes hard run some Nitto drag radials out back to hook it up on the street. If you plan on running common street radials, you can count on traction problems.
If you are running an automatic, spend $ on a quality torque converter matched to your combination. Better yet, put in an overdrive transmission and EFI it.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Chassis stiffening
[Re: Spaceman Spiff]
#2554345
09/25/18 03:00 AM
09/25/18 03:00 AM
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Joined: Feb 2010
Posts: 18,493 Granite Bay CA
Kern Dog
Striving for excellence
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Striving for excellence
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
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I clicked on the link. Nothing about chassis stiffening from 15.00 to 24.00. If I were a drag race guy, that would have been time well spent.
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Re: Chassis stiffening
[Re: Kern Dog]
#2554699
09/25/18 07:55 PM
09/25/18 07:55 PM
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Joined: Oct 2012
Posts: 91 Calgary, AB
64Bel
member
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member
Joined: Oct 2012
Posts: 91
Calgary, AB
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I clicked on the link. Nothing about chassis stiffening from 15.00 to 24.00. If I were a drag race guy, that would have been time well spent. The chassis stuff was somewhere around the 40 minute mark. 318 TBs, 318 springs, no snubber, no subframe connectors. G70 tires being the limitation.
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