We'll this example is at one end of the spectrum. We have a 11:1 cr "street" 655 in a full weight Challenger, Car has gone 9.46 and 145.9. We have had issues with the fueling, bogs, and missfires hasn't made a decent full pass yet. Once sorted we're hoping to dip into the 8's. Weight is nigh on 4000lb, talk about doin it the hard way  . We've also stripped the gearbox as a matter of course and found we had self induced issues there too 
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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