| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
03-30-2025, 09:26 AM
|
||||
|
||||
Camshaft usage help for a 400 cid.
Here are the results of gas speed analysis in terms of the rpm of peak torque and HP for different factory cam’s when used with 67 and up D port heads ( 4 bbl carb ) and the change when a true 1.65 ratio rocker is exchanged from the stock 1.50.
067 cam Peak TQ. 2980. Peak HP 4530 068 cam Peak TQ 3260. Peak HP 4790 744 cam Peak TQ 3390. Peak HP 4880 041 cam Peak TQ 4100. Peak HP. 5800 Changes with 1.65 rockers ————————————— 067 cam Peak TQ 3280. Peak HP 4980 This is a rpm change of 300 rpm for peak TQ and 450 for peak HP. 068 cam Peak TQ 3590. Peak HP. 5270 Change in peak TQ 330, change in peak HP 480 744 cam Peak TQ 3730 peak HP 5370 Change in peak TQ 340 change in peak HP 490 041 cam Peak TQ 4500. Peak HP 6380 Change in peak TQ 400, change in peak HP 580. This is why for spirited street driving in high gear you want your rear gearing to have you right in the start of where peak TQ is coming in.which is usually 600 to 1000 rpm below the rpm of peak TQ.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
