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#1
04-13-2021, 03:58 PM
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WS6 front spring rate?
Just wondering if anyone can tell me what the front spring rate was for the WS6 cars?
I thought they were a great combination of firm but not harsh or jarring. |
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#2
04-15-2021, 03:11 AM
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Not really an answer.......but Herb Adams......who was a Pontiac engineer responsible for a lot of good things on the 70 TA....recommended replacing WS6 front coils with base bird springs....after removing a 1/2 coil...
This lowered the car by an inch....while increasing spring rate. The big sway bars reduced the need for stiffer springs |
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#3
04-15-2021, 09:34 AM
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I want to think 330lb/in is in my memory banks.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#4
04-19-2021, 01:26 PM
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I have a copy of Herb Adams old Fire-Am catalog (circa 1977). In it he says:
"....you don't want to increase the rate of your front springs much above the 330 lb per inch the stock Trans Am uses." Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
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#5
04-20-2021, 02:34 PM
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Wow much softer then I expected.
I bought Hotchkiss springs for my 1st Gen bird are 600 lb/in. I hate them. I always thought the WS6 bird drove nice and handled nice. Now I understand why. Big sway bar and softer springs. |
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#6
04-23-2021, 06:50 AM
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I have 400lb springs in my TA with 3/4 of a coil removed. My civic will go over the local tracks faster and not bottom out where I'm bouncing off the bump stops on my TA.
Big sway bars only do so much and there are trade-offs. |
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#7
04-26-2021, 12:19 AM
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My 80 TA has the WS6 package and the PHS MVMA paperwork shows 330lbs like everyone else stated.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
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#8
04-26-2021, 05:06 PM
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I kind like a rate in the 500 range myself
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#9
04-26-2021, 08:50 PM
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320 lbs/in. When I replaced the 301 with a mild 455, Bird finally had the right stance. All WS6 cars had the front of the car higher than a regular Trans Am or Formula. When Herb Adams cut the front coil springs to get a stiffer rate spring, the factory just figured out the rate and then put a stiffer 320 lb full size spring in.
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