g-strandet
Member
- Joined
- May 30, 2017
- Messages
- 16
- Reaction score
- 0
- Location
- Germany
- My Car
- 1971 Covertible with 351C 2V
Posts: 5
I have a 71' Mustang with 351C and C6-Automatic and problems with the idle (high difference about 400-500 rpm between P/N and D/R/1/2).
The Cleveland has 4V heads, the orignal 4V iron intake and a 600 cfm Holley (80457 with vac. secondarys).
Engine is bored out to 4.02
Pistons are keith black KB177-020
4V iron-headers with 2¼ H-Pipe
The heads are from 73 with small valves and open chamber but I want back to my 2V-Heads from 71 (open chamber) with 4V Edelbrock intake (2750).
The cam ist a Howard Street Force 2 (230021-12)
Ignition (Pertronix 3): 16° by idle and 34° totaltiming, vaccum at timed/ported.
Which cam will be better for my setup?
(Howard Street Force 1, Melling CL-MTF-2, Summit SUM-5200? ...or some other?)
I want better idle and fuel economy.
Or is the reason for the trop in the RPM the C6 (to big?) or the combination from cam and C6?
Some other ideals to optimise?
Greetings from Germany
Christian
I have a 71' Mustang with 351C and C6-Automatic and problems with the idle (high difference about 400-500 rpm between P/N and D/R/1/2).
The Cleveland has 4V heads, the orignal 4V iron intake and a 600 cfm Holley (80457 with vac. secondarys).
Engine is bored out to 4.02
Pistons are keith black KB177-020
4V iron-headers with 2¼ H-Pipe
The heads are from 73 with small valves and open chamber but I want back to my 2V-Heads from 71 (open chamber) with 4V Edelbrock intake (2750).
The cam ist a Howard Street Force 2 (230021-12)
Ignition (Pertronix 3): 16° by idle and 34° totaltiming, vaccum at timed/ported.
Which cam will be better for my setup?
(Howard Street Force 1, Melling CL-MTF-2, Summit SUM-5200? ...or some other?)
I want better idle and fuel economy.
Or is the reason for the trop in the RPM the C6 (to big?) or the combination from cam and C6?
Some other ideals to optimise?
Greetings from Germany
Christian