#21  
Old 11-20-2021, 11:57 PM
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Dang that is heavy for a first gen! I always thought they were lighter than second gens. My second gen Camaro/iron IA is 3595 race weight with me and has full interior.

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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
  #22  
Old 11-21-2021, 06:03 PM
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Race weight with me in the car for my '68 with one fiberglass seat and an IAII with Ali heads is 3550# with a 6 point roll bar. With 10 gal of fuel.

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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
  #23  
Old 11-23-2021, 06:12 PM
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I got the new Split Mono Springs installed today.. The rear sits about 1" higher than before, not terrible. I will wait to see if they settle any, but I doubt it. I will be ordering the shocks next week. The old springs definetly had 1 with less arch in the spring. That must be why the car sat so crooked.

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Old 11-23-2021, 06:43 PM
78w72 78w72 is offline
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Originally Posted by Scott Stoneburg View Post
I got the new Split Mono Springs installed today.. The rear sits about 1" higher than before, not terrible. I will wait to see if they settle any, but I doubt it. I will be ordering the shocks next week. The old springs definetly had 1 with less arch in the spring. That must be why the car sat so crooked.
did you wait to tighten the bushing bolts until full weight was on the wheels? i assume you did but lots of people arent aware of or overlook that with new bushings so just wanted to mention it.

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Old 11-23-2021, 06:57 PM
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did you wait to tighten the bushing bolts until full weight was on the wheels? i assume you did but lots of people arent aware of or overlook that with new bushings so just wanted to mention it.
Thanks, yes I did. I read that in an earlier post. Without that i probably would not have thought of doing it that way. I called Calvert and got a shock and initial setting recommendation. I didn't ask him about preload though. How much preload are you all using? I'll be foot braking, no trans brake.

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Old 11-24-2021, 06:34 AM
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Scott: I just do there recommended preload on the Caltracs. I believe it's a quarter to half turn with the driver in the seat. What was the recommend setting for the shocks? I posted a pic a friend gave me at the track this summer.
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Old 11-24-2021, 06:56 AM
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The tech said the shocks have a 9 way setting, for a footbrake car he said to start at #6

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Old 11-24-2021, 11:26 AM
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i recall hearing the "no street" thing for mono leafs was due to safety concerns... in an accident or other extreme situation they can break & let the rear end go free or sideways compared to multi leaf steel springs.

i was considering mono leafs for a car many years ago & thats what i was told by a few mechanics & racers regarding mono leafs on the street. but i know tons of guys use them on the street without any issues so could be one of those things where a company just makes the statement to cover their butts for IF it might happen.
I've cracked the main leaf of a multi-set three times, twice on the right side and once on the left. Always happened during cold weather in Ohio. The right side breaks came after installing a B&M Transpack kit in my younger, naive transmission knowledge days. The left side break happened when the flexplate cracked and pulled the converter out of the pump tangs in the transmission and it locked up. Wound up installing the HD spring sets used on the 1975 police edition Nova. (It was handy working for GM at the time)

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Old 11-24-2021, 11:41 AM
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I've cracked the main leaf of a multi-set three times, twice on the right side and once on the left. Always happened during cold weather in Ohio. The right side breaks came after installing a B&M Transpack kit in my younger, naive transmission knowledge days. The left side break happened when the flexplate cracked and pulled the converter out of the pump tangs in the transmission and it locked up. Wound up installing the HD spring sets used on the 1975 police edition Nova. (It was handy working for GM at the time)
yeah ive seen cracked leafs in multi leaf cars & trucks too, but the other leafs kept the rear together. crack a mono leaf & theres nothing else there to keep the rear end in place, im sure these mono leafs are fine for majority of cars on the street, just mentioning what ive heard about safety issues in extreme situations.

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Old 11-24-2021, 05:14 PM
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did you wait to tighten the bushing bolts until full weight was on the wheels? i assume you did but lots of people arent aware of or overlook that with new bushings so just wanted to mention it.
Not as big a deal on aluminum spring eye bushing since the inner sleeve still spins vs rubber where the sleeve is captured by the rubber.

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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
  #31  
Old 11-24-2021, 05:34 PM
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Not as big a deal on aluminum spring eye bushing since the inner sleeve still spins vs rubber where the sleeve is captured by the rubber.
yeah i was wondering what kind of bushings they used up front & at the rear shackles.

  #32  
Old 11-24-2021, 09:58 PM
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yeah i was wondering what kind of bushings they used up front & at the rear shackles.
Front bushing is an Aluminum outter busing with a steel inner that is free to spin in the aluminum. The rear has neopreme or poly bushing.

  #33  
Old 11-25-2021, 10:48 AM
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I ran aluminum/steel in the Tri City Launcher Springs in the 78 TA even on the street. Just pulled them off to put street/cornering springs on it and they looked fine 20+ years later.

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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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