10-28-2004, 08:43 PM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
Interesting thread. I've studied the elapsed times (various sources) of the 289 Cobras vs the 427 Cobras. Depending on the source usually both are low 12's. Surprisingly the 427 wasn't "that much" quicker, but had a substantially higher trap speed. The HUGE advantage the original Cobras have over us was WIEGHT. Very low 2000 lb, race versions in the 1900 range.
My experience from chatting with various Big Block members here is that GENERALLY speaking low 12's is about as good as it gets. This from a BB streetable (9.5 or 8 to 1 compression for instance), stock tires, top loader and quite often the "classic" 3.31 rear gear.
With the Big Block and a LOW rear gear it spelled trouble! 1st gear is "perfectly" useless with street tires. Short shift or start in 2nd produced the best ET's.
My buddy just ran 13.8 with his totally stock FFR, 302 5 speed, 3.50 rear gear. HE was very disappointed, to me the ET was about what I expected! Now his engine has substantial up-grades. From what I'm hearing here, perhaps low 13's is a good as it might get?
My ERA 427 FE ran 11.90 at 121 with a SLOW 2 second 60 ft time. What THAT means is: Big Blocks keep pulling HARD at the end, small blocks are quick off the line but tend to run out of steam at the end. Result? Close to or equal ET with top speed going to the BB car.
By the numbers:
60 ft 2.087
1/8 mile 7.870 at 96.14 mph
1/4 mile 11.904 at 121.27 mph
Last edited by Excaliber; 10-28-2004 at 08:50 PM..
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