BBC pump gas motors
#11
Senior Member
MASTER BUILDER
Join Date: Dec 2004
Location: out of my mind in Kalamazoo, MI
Posts: 179
Originally Posted by ashbros
QUOTE OF THE WEEK
"Too much bump and not enough squeeze"
Thats a classic.
"Too much bump and not enough squeeze"
Thats a classic.
#12
Member
JUNIOR BUILDER
Thread Starter
Join Date: Oct 2003
Posts: 84
Originally Posted by slickfuel
Supergass,...........
That is actually a 496 ci,....not 505ci
505ci= 4.350 bore & 4.250 stroke
:roll: :roll:
I also have just built a 505 (4.310 bore and 4.250 stroke)
505ci= 4.350 bore & 4.250 stroke
:roll: :roll:
#13
Member
JUNIOR BUILDER
Thread Starter
Join Date: Oct 2003
Posts: 84
Originally Posted by radicalz
Originally Posted by ashbros
QUOTE OF THE WEEK
"Too much bump and not enough squeeze"
Thats a classic.
"Too much bump and not enough squeeze"
Thats a classic.
I agree, I do run a 4150 cfm 950 HP now. Seems to be tuned well. Im thinking I am going to go with a duration around 260 and 270 at .050 on a regrind. That should help get a little cyl pressure. Thanks!
#14
Junior Member
SHOW GUEST
Join Date: Oct 2005
Location: North Bay, Ontario Canada
Posts: 8
i ran a bbc that was kinda small and it ran awesome.. it reved like a small block... still have it here is the combo
454 30 over, 6.385 h-beam rods , steel 4inch stroke crank, srp 26cc dome, 320 cc procomp heads mild port work, compression was 10.86 to 1 with a 39 thou gasket and piston was 5 thou out the deck, cam was comp xtreme energy grind 660 int 666 exh, i beleive it was 11-773-8 set 4 degree's advanced, 38 degree's timing, team g intake with csr 1 3/4 spacer, 1090 king demon carb, powerglide with 1.76 first and 5600 stall brd 9.5 converter in a 1980 z28 with 4.56 gears and 32-14.5 slicks and car weight is 3000 lbs with me in it..
best was 6.35 at 108 mph in the 1/8 and 9.91 in the 1/4 at 135mph 1.29 60 foot
average was 6.40 at 107 in the 1/8 and 10.01 in the 1/4 at 133mph 1.32 60 foot
leaving at 4400 on the brake and shifting at 6400....
i would be looking into the duration and cam event timing and because on a pump gas motor you want a cam that will help you build cylinder pressure and the xtreme energy grinds do this. also make sure you have a good converter builder because you may have a converter that is lazy of the line... i use Brian phaze from bdr in buffalo ny, he has been dead on the last three converters i have bought for different motors and cars, he asks all the questions such as all the engine parts and drivetrain...
just my opinion...
454 30 over, 6.385 h-beam rods , steel 4inch stroke crank, srp 26cc dome, 320 cc procomp heads mild port work, compression was 10.86 to 1 with a 39 thou gasket and piston was 5 thou out the deck, cam was comp xtreme energy grind 660 int 666 exh, i beleive it was 11-773-8 set 4 degree's advanced, 38 degree's timing, team g intake with csr 1 3/4 spacer, 1090 king demon carb, powerglide with 1.76 first and 5600 stall brd 9.5 converter in a 1980 z28 with 4.56 gears and 32-14.5 slicks and car weight is 3000 lbs with me in it..
best was 6.35 at 108 mph in the 1/8 and 9.91 in the 1/4 at 135mph 1.29 60 foot
average was 6.40 at 107 in the 1/8 and 10.01 in the 1/4 at 133mph 1.32 60 foot
leaving at 4400 on the brake and shifting at 6400....
i would be looking into the duration and cam event timing and because on a pump gas motor you want a cam that will help you build cylinder pressure and the xtreme energy grinds do this. also make sure you have a good converter builder because you may have a converter that is lazy of the line... i use Brian phaze from bdr in buffalo ny, he has been dead on the last three converters i have bought for different motors and cars, he asks all the questions such as all the engine parts and drivetrain...
just my opinion...
#15
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
Originally Posted by zipper06
Originally Posted by ashbros
Hey zipper
pretty cool car you have there
The numbers you are posting put you around 780 to 800 hp.
Damb good 1/8 mile number and MPH
pretty cool car you have there
The numbers you are posting put you around 780 to 800 hp.
Damb good 1/8 mile number and MPH
Zip.
It did run 10.17@128 with backing off at a 1000' which i guess is o'k for the car described in my earlier post. I think it could have run 10.0's but i'm just guessing. I'll go with a 200 shot next time and put a 7200 chip. It might go 9's but again just guessing. It is a 468" 10.2 compression, and weighs 3700 lbs and that in on 93 octane shell gas.
still learning,
Zip.