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74 vs 86

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Old Sep 18, 2001 | 02:40 PM
  #21  
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Default Re: 74 vs 86 (Smash)

14.6 14.7.,.. yep, the L98 will whup the big block.
OK. :rolleyes: 1973/4 tires. My friend has a BONE STOCK 1973 454 with 3.08 TH400 auto. ONLY mod is new Goodyear Eagle ST.

14.1/97.5 mph. I believe that it would be a good race.

The L98 is a good motor but do not dismiss what came before without thinking about it first.

I have seen many tests of L98s in the 14.7/14.8 range too. I can post them if you want. :D
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Old Sep 18, 2001 | 02:40 PM
  #22  
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Default Re: 74 vs 86 (SuperFast80)

his 74 is the automatic version, so i would whip him soundly?
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Old Sep 18, 2001 | 02:46 PM
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Default Re: 74 vs 86 (SuperFast80)

the 74 weighs 3600lbs! At 270hp, that's 13.3lbs/hp, as opposed to thje L98's 12.4lbs/hp.

A top speed of 122.. whats up with that? Aerodynamics, I guess?
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Old Sep 18, 2001 | 02:48 PM
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Default Re: 74 vs 86 (vader86)

his 74 is the automatic version, so i would whip him soundly?
Race him. According to SUperfast80 it's pretty close.. so if he does edge you out, just throw a corner in there. :D



[Modified by Smash, 12:49 PM 9/18/2001]
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Old Sep 18, 2001 | 02:49 PM
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Default Re: 74 vs 86 (Smash)

A top speed of 122.. whats up with that? Aerodynamics, I guess?
You didn't wanna be going much faster on bias ply.
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Old Sep 18, 2001 | 02:59 PM
  #26  
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Default Re: 74 vs 86 (scorp508)

A top speed of 122.. whats up with that? Aerodynamics, I guess?


You didn't wanna be going much faster on bias ply.
You have a point there, but the article mentions maximum speed at redline. Scarily low.
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Old Sep 18, 2001 | 03:04 PM
  #27  
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Default Re: 74 vs 86 (Smash)

You have a point there, but the article mentions maximum speed at redline. Scarily low.
Possibly the gearing. I see the 4-speed BB has a 3.55 rear, and hte auto a 3.08. I wonder waht the tranny gearing was though.
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Old Sep 18, 2001 | 05:13 PM
  #28  
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Default Re: 74 vs 86 (scorp508)

If you look at the transmissions, you will find that there is NO overdrive. Throw in a 700R4 and you'll see 140+. Until then, lots of redline, not much speed.
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Old Sep 18, 2001 | 11:13 PM
  #29  
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Default Re: 74 vs 86 (vader86)

Well I've got a pretty unique perspective on this if you want to compare an 86 Z-51 auto to a 73 LS-4 close ratio muncie, since I drove both cars to Effingham this weekend (different days obviously). The LS-4 doesn't have any problem dispatching the L-98 in a straight line if it can hook up, the amount of torque difference is substantial, and the L-98 is an awfully torquey small block but the 454 is a different world on the torque table. Now the 86 Z-51 is better in just about every other category however, especially handling. Now 74 is slightly different then 73 in that the LS-4 is rated 5 horse less and these are net ratings and have been since 72. Now comparing small block to small block, it would take an awfully well optioned 74 L-82 with the optional gears and somebody good with a 4spd to take an 86 Z-51 with 3.07's. If I had to bet between those two I'd go with the lighter 86.

:cheers:
Pat Kunz
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Old Sep 19, 2001 | 01:23 AM
  #30  
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Default Re: 74 vs 86 (vader86)

My inline Six powered 64 Nova will whip both of em :jester
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