Ran the car for the first time last weekend with the new 306 & a t5 it ran 10.83 w/ 1.98 60ft our track is a 1000ft not a 1/4 mile. Need to do some suspension work cause it wasn't hooking for crap lol. 40 year old stock leaf springs where killing me but I thought that wasn't bad for the first time out in it
Its a stock roller block w/ stock crank eagle rods hyp flat tops w/ stock gt40p heads arp stuff holding it all together. Cam is a comp cams hyd roller thumper 283 grind, topped with a air gap intake and demon 650
One thread I found on net posted by a guy with a Chevelle said multiplying by 1.2 worked out for 1/4 mi ET for his car... That's no doubt going to vary by HP, traction, gearing etc...
Based on the 10.83 1000 foot time, an ET calculator I found on the web gave a 1/4 mile time of 13.05.
I meant to grab my time slip at home this morning but I forgot ill see if the wife will snap a pic of it
my friend just had some ported & flowed I'll ask him the flow numbers for stock again cause I don't remember but they where pretty impressive for a stock head of course it was way better after porting & these numbers will most definitely get better I haven't even touched the carb or timing on it & like I said on stock 40yr old suspension. launching off idle 1300 or so cause it was the tires off lol
time slip looks like this Reac: .5446 60ft: 1.9827 330ft: 555.25 1/8: 8.4853 1/8: 85.23 mph 1000ft: 10.8361 1000ft: 95.91 mph
85 mph in the 1/8 is scootin' pretty good... No doubt could add at least another 22-24mph in the 1/4... With traction and a little tuning you have a solid 12.5-12.7 car...
My friend said they flowed right at 200cfm stock and after porting 240cfm on the intake side he didn't say on the exhaust I plan on getting mine ported next time I pull them
