Tczz
Member
Hello I have a max wedge motor that is sometimes a prick to start ... Dirty fuel an dirty plugs have been replaced so I'm ready to throw the switch again but ...
The engine is a 63 dated MW rb block with SR440 Indy heads which were rated with alot of work to them as a bolt on 100 hp. Reputed hp for the engine was about 700hp but I don't have the paperwork to say... to me the motor does not look that busy so time on a dyno will be useful
Crane cam is # F-268/3868-2-8 which is a moderate spec cam suited to work with 3500 stall converter
Manifold is Indy 4150 with 850 Holley DP ... Fuel is Av Gas so up over 105 depending on age
MSD Dizz without the 6al box do have a one to go in for another day of fettling around ...
Question.... thats been wearing out the brain is the plug gap for these plugs NGK 5671-10 factory set is .021 has been suggested to bump them out to .040 ... compression is 225-230 psi cylinder pressure ... 021 I think is abit small and have had varying numbers suggested to use ...I have opened them to 040 ... the manual sets them at a factory 035... so yeah its a trail and error thing but don't want to risk damage.
thanks for the help
cheers
The engine is a 63 dated MW rb block with SR440 Indy heads which were rated with alot of work to them as a bolt on 100 hp. Reputed hp for the engine was about 700hp but I don't have the paperwork to say... to me the motor does not look that busy so time on a dyno will be useful
Crane cam is # F-268/3868-2-8 which is a moderate spec cam suited to work with 3500 stall converter
Manifold is Indy 4150 with 850 Holley DP ... Fuel is Av Gas so up over 105 depending on age
MSD Dizz without the 6al box do have a one to go in for another day of fettling around ...
Question.... thats been wearing out the brain is the plug gap for these plugs NGK 5671-10 factory set is .021 has been suggested to bump them out to .040 ... compression is 225-230 psi cylinder pressure ... 021 I think is abit small and have had varying numbers suggested to use ...I have opened them to 040 ... the manual sets them at a factory 035... so yeah its a trail and error thing but don't want to risk damage.
thanks for the help
cheers