61 Bubble
Well Known Member
Engines are just air pumps! X amount of air/fuel IN, BOOM, power, X amount out. As a certain HUGE named engine builder told me in the pits of an IHRA event:
"an engine doesn't know WHAT valve cover is on it. Therefore the "theory" of producing power is the same. Bore with a direct relationship to valve size/profile and placemant is more important then stroke. Heads with regards to SSR and LSA helps determine the amount of power one can produce. If your after Hp and fast ET, then RPM's are your friend."
Now with that being said, most BBc street cars with rollers are well over the old .714 cam now adays. 700 Lift doesn't do squat to the inside of a motor any more then 600. Lift DOESN'T kill valvesprings as some people are saying. There are way to many factors that do effectively reduce valvespring life of which lobe design is probably the most critical. That along with RPM and duration of run time does contribute to these factors. The video I posted, has a SB under 400 inches, make 3+Hp per cube, cam is OVER 1.175 lift and as long as he keeps the revs around 10,300 RPM the springs should last a season. Now at 10,800 maybe a weekend and a half. BUT we also have a SS car with a killer set-up that when he's going to National events can go through a set of springs in 4 passes. Anyone ever try to run an OLD Stock Eliminator on the street? They are low lifts??????
My guys 632 that runs 4.70 NA without the 3 stages turned on and street tire through the mufflers and has a cam in excess of .800 can cruise all day long with a STACKED injected BBc on fuel with a lenco. 3 hours of solid driving with about an hour of highway running thrown in too. BUT THAT'S not the point. Cams/springs have gone like clutches. YEARS ago people were buying 3500+lbs clutch to hook these high Hp cars. Killing guys left legs, NOW look at the clutches!!!! It's like driving a factory Honda clutch car. Gone are the "shaky legs" from the '80's when guys were at the light waiting for the green.
Time and technology has also helped get make things last at the same time as making BIG power for the street. Yes it's not gonna drive like a Honda Civic, but that's the point. These are OLD muscle cars and therefore need some muscle. YES some of it cost more, but that's part of the equation as well.
"an engine doesn't know WHAT valve cover is on it. Therefore the "theory" of producing power is the same. Bore with a direct relationship to valve size/profile and placemant is more important then stroke. Heads with regards to SSR and LSA helps determine the amount of power one can produce. If your after Hp and fast ET, then RPM's are your friend."
Now with that being said, most BBc street cars with rollers are well over the old .714 cam now adays. 700 Lift doesn't do squat to the inside of a motor any more then 600. Lift DOESN'T kill valvesprings as some people are saying. There are way to many factors that do effectively reduce valvespring life of which lobe design is probably the most critical. That along with RPM and duration of run time does contribute to these factors. The video I posted, has a SB under 400 inches, make 3+Hp per cube, cam is OVER 1.175 lift and as long as he keeps the revs around 10,300 RPM the springs should last a season. Now at 10,800 maybe a weekend and a half. BUT we also have a SS car with a killer set-up that when he's going to National events can go through a set of springs in 4 passes. Anyone ever try to run an OLD Stock Eliminator on the street? They are low lifts??????
My guys 632 that runs 4.70 NA without the 3 stages turned on and street tire through the mufflers and has a cam in excess of .800 can cruise all day long with a STACKED injected BBc on fuel with a lenco. 3 hours of solid driving with about an hour of highway running thrown in too. BUT THAT'S not the point. Cams/springs have gone like clutches. YEARS ago people were buying 3500+lbs clutch to hook these high Hp cars. Killing guys left legs, NOW look at the clutches!!!! It's like driving a factory Honda clutch car. Gone are the "shaky legs" from the '80's when guys were at the light waiting for the green.
Time and technology has also helped get make things last at the same time as making BIG power for the street. Yes it's not gonna drive like a Honda Civic, but that's the point. These are OLD muscle cars and therefore need some muscle. YES some of it cost more, but that's part of the equation as well.
, tried to buy it but there are all spoken for 
gotta put me name down on waiting list 
for that next batch
Makes Tony Schaffer's accomplishment look even more impressive . then again , imagine what this intake would do on that engine? bolt on another 40 hp
