Need Help BBC Cam
January 21st, 2021, 10:41 AM
#1
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Need Help BBC Cam
What I know: BBC 402, Oval port 454 heads, CompCam 1.7 Roller Rockers.
- Choppy idle
- Seems to run best at 14-16 degrees initial timing
- 6.5 inches of vacuum at idle
No cam specs came with the car when I bought it (1970 Nova). Lots of quality parts on this car.
Whoever built it didn't go cheap.
I'm guessing it's a Comp Cam b/c of the rockers. Called Comp Cams and they say the part number
is on the back of the camshaft, so I can't simply remove the timing chain and see the number.
I'm about to convert it from a 750 Holley to Edelbrock EFI and the setup for the EFI asks for a cam
duration range. Mild: 210 - 230 degrees or Race: 230 - Greater
Questions ? Comments ?
What do ya'll think ?
- Choppy idle
- Seems to run best at 14-16 degrees initial timing
- 6.5 inches of vacuum at idle
No cam specs came with the car when I bought it (1970 Nova). Lots of quality parts on this car.
Whoever built it didn't go cheap.
I'm guessing it's a Comp Cam b/c of the rockers. Called Comp Cams and they say the part number
is on the back of the camshaft, so I can't simply remove the timing chain and see the number.
I'm about to convert it from a 750 Holley to Edelbrock EFI and the setup for the EFI asks for a cam
duration range. Mild: 210 - 230 degrees or Race: 230 - Greater
Questions ? Comments ?
What do ya'll think ?
January 28th, 2021, 8:17 AM
#2
CF Beginner
Join Date: Dec 2020
Location: San Antonio
Posts: 1
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What I know: BBC 402, Oval port 454 heads, CompCam 1.7 Roller Rockers.
- Choppy idle
- Seems to run best at 14-16 degrees initial timing
- 6.5 inches of vacuum at idle
No cam specs came with the car when I bought it (1970 Nova). Lots of quality parts on this car.
Whoever built it didn't go cheap.
I'm guessing it's a Comp Cam b/c of the rockers. Called Comp Cams and they say the part number
is on the back of the camshaft, so I can't simply remove the timing chain and see the number.
I'm about to convert it from a 750 Holley to Edelbrock EFI and the setup for the EFI asks for a cam
duration range. Mild: 210 - 230 degrees or Race: 230 - Greater
Questions ? Comments ?
What do ya'll think ?
- Choppy idle
- Seems to run best at 14-16 degrees initial timing
- 6.5 inches of vacuum at idle
No cam specs came with the car when I bought it (1970 Nova). Lots of quality parts on this car.
Whoever built it didn't go cheap.
I'm guessing it's a Comp Cam b/c of the rockers. Called Comp Cams and they say the part number
is on the back of the camshaft, so I can't simply remove the timing chain and see the number.
I'm about to convert it from a 750 Holley to Edelbrock EFI and the setup for the EFI asks for a cam
duration range. Mild: 210 - 230 degrees or Race: 230 - Greater
Questions ? Comments ?
What do ya'll think ?
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