big small block

[cnoswalt78]

a nice all moded 750 proform holly with 850 center sounds good, itll rev fast!

[Squirell]

Cubic inch x max rpm divided by 3456 gives u the carb size.
So for example 383ci x 7000rpm divided by 3456 gives u a 775 cfm carb. So knowing that your suppose to step up to the next carb. Which would be a 830 0r 850

[page69]

i got a book on the big small blocks.they run 9.1:1 compression,a 0.525 lift cam,1.5:1 rockers,220 cc heads with big valveswith an 870 modified holley and 1 3/4 headers getin  610 hp @6400 and 584 fpt @4500 rpm on a 4.250 x4.00 block.That motor you're buildin will make the truck wicked. can't wait to see it

[Jjay78]

holley's website also has a carb thing on it to help pick the exact carb for your use, you just pick the options it gives you put it your info and it'll give you a list of recomended carbs for what your going to use it on, but a smaller carb on a motor will give you a sharper throttle response verses a larger carb on the same motor, the bigger one will give more top end than the smaller one will, but the smaller will react faster on a given engine size.

[old school truck dude]

i got a book on the big small blocks.they run 9.1:1 compression,a 0.525 lift cam,1.5:1 rockers,220 cc heads with big valveswith an 870 modified holley and 1 3/4 headers getin  610 hp @6400 and 584 fpt @4500 rpm on a 4.250 x4.00 block.That motor you're buildin will make the truck wicked. can't wait to see it

Whats the name of that book? 610 horsepower with only 9 to 1 compression ratio doesnt quite sound right to me.

[RIP_K52007]

just skidway it.. run a quadrajet with the secondarys wired open at all times

[tnbt78]

thanks for all the carb tech leaning toward the 850. according to my machine shop my heads will flow enough for the big cam and should be around 13 to 1 he seems to think we will be in the 750 range for horse power with all the tricks we have in store. as for the 4-7 swap cam this takes alot of strain off rods and crank.  this project taking a little longer than expected due to blazer blew a trans line and caught fire but is coming along just slow. takes time to get all the clearancing perfect but this thing will be well worth the wait.   


and we now have a name for the truck     southern discomfort

[page69]

that book is how to build  big-inch chevy small blocks in the back they have power pakage sheets for 406 with 427 hp,383 with 474 hp,415 with 482 hp,383 with 530 hp another 406with 581 hp and that 454 with 610 hpthis book gives all the specs on every motor from heads to oil pump.i was goin to buld on but i come across a new 454 big block rebuilt for a good price to i went that route.

[Blue]

a nice all moded 750 proform holly with 850 center sounds good, itll rev fast!

I vote for this!

[Orangecrush]

sounds like a ripper! keeep us posted as to how it runs.

[Proud and Powerful]

sounds wicked