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#1
02-08-2025, 01:19 PM
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Coil spring rate??
Looking into front coil springs for my Firebird. It weighs about 3100lbs without me in it. Recommendations for spring rate?
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#2
02-08-2025, 01:56 PM
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What's the application?
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#3
02-08-2025, 02:17 PM
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#4
02-08-2025, 02:17 PM
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Also probably need front/rear weight or bias?
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#5
02-08-2025, 02:34 PM
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Are you looking at coil over spring, or just coil springs with stock control arms?
__________________
68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
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#6
02-08-2025, 02:38 PM
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That's too funny. I couldn't help myself. Go easy on Paul. We all need him..
__________________
68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
| The Following User Says Thank You to chuckies76ta For This Useful Post: | ||
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#7
02-08-2025, 02:54 PM
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I don't know the front weight just total weight.was hoping someone with a 2nd firebird might have an idea. |
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#8
02-08-2025, 03:02 PM
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#9
02-08-2025, 04:17 PM
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Oh Paul, now your on your own, lol... I have global west upper and lower controls arms on Wife's 68 Firebird. We have Viking shocks with 450 pound rate springs. The total weight of the car is about 3500 pounds. I went with a heavy spring because I found the front end heavy with the IA2 block. This is for 1/4 mile racing.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
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#10
02-08-2025, 06:48 PM
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I know back when QA1 was selling thir single adjustable hybrid coil overs the 350lb springs were too soft for many second gens,, but your is pretty light. those guys went with 450
Putting some QA double adjustable hybrids on my 64 Vette project from Global West and Doug there said said to use 350s on it.
__________________
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-sold 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#11
02-08-2025, 07:31 PM
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My 1st gen Bird is about 3050 without me in it. I trusted Mike Proulx at Viking to pick my shocks and hybrid coilover springs. He recommended 350 lb springs for my application. I thought they would be too stiff for proper weight transfer. He nailed it!
__________________
Greg Weigart IAIIA 520/pump gas/SD 325 E-heads/266-272 SR cam/1050 Dominator/3.73/ET Street Radial Pro/3300lbs/1.35 60'/6.21@110.47/9.77@137.08 Hot Rod Drag Week finishing averages: 2014 - 11.12 @ 118.56 2015 - 10.84 @ 124.97 2016 - 10.56 @ 127.88 2017 - 10.29 @ 130.74 2018 - 10.29 @ 130.53 2019 - 10.16 @ 132.34 2021 - 10.09 @ 132.69 2022 - 10.13 @ 133.07 
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#12
02-08-2025, 08:56 PM
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Quote:
__________________
Brad Yost 1973 T/A (SOLD) 2005 GTO 1984 Grand Prix 100% Pontiacs in my driveway!!! What's in your driveway? If you don't take some of the RACETRACK home with you, Ya got cheated    
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#13
02-08-2025, 09:37 PM
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#14
02-09-2025, 01:52 AM
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maybe you might be better off getting your car scaled with you in it...i was going to just try running what was working for others on my 65, then the guy that did the roll cage told me i should wait until its race ready or as close as it could be with no springs lol
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