Gotta run mid 7s
 

I have been reading for a long time here but this is my first topic. I need a little advice if possible. I am planning a bbc combo for a buudy and it needs to run pretty hard. It is a 4 link dragster that runs low 8.20s now with a 468. They want to run top dragster so it needs to run in the mid 7s. The only limiting factor is we have a new set of bb2 extra heads that were won or givin as sponsorship. I was thinking of a 555 or something. I ran mid sevens with a 505, but it was a hardtail, a little lighter, and I was leaning on it pretty hard. This needs to be a single gas 4bbl that is maintenence free. What combos seem to be the best. Thanks for the help guys.

Mid 7's shouldn't be a problem with what you have.I ran 7.60's in 1983 with a 307ci in a C/ED with a single 4 barrel on gas.

Any idea what that car weighs ? You'll find that there is more then just weight difference in the hardtail and suspended cars, them shocks do slow things down. I think the heads will be some what a limiting factor here. My 548 CI @ 2011lbs with dart 355s would run low 7.7's all day without leaning on it with single carb. There is a lot of things that will make or break this combo, rim/tire combo 16" rim will be .08 slower, conv will be key. Where you live will also make or break it, elevation has a to do with everything. If its a typical 4 link car @ weighs 1925lbs or so has a properly setup carb/conv/tire combo I think 7.6's is do able with them heads but not much more. This would be around me with slim to no good air to race in.

rjd.... Heres how you solve your problem ! Go to ad# 1067561 and buy this engine, guarenteed to run 7.50 or better! Thanks, Don

I just need to make sure it runs in the 7s in bad air. Davis, that motor is nice, just a little out of our price range. The car will be set up properly with gear, fuel, tires and such. Like I said, I was just fishing for the combos people are using mostly. Thanks again.

If you have to buy the stuff go 582 or 598 ! a 555 in bad are in a suspended car that weighs anything like it should wont be a mid 7.5's car unless you make it something like the motor mentioned above.