SBC 4/7 swap headers
#11
Junior Member
JOURNEYMAN
Join Date: Sep 2005
Posts: 26
i would change the cam because it just aint right!! I would use a 2/3 4/7 swap cam with 108 Ic/l 112 lob sep 625 i lift with a 1.6 rocker adding .040 to that number the 656 exhaust and 1.5 rocker on that have the duration at 284 int 282ex I would give that a look good luck with your motor joe g 8)
#13
Senior Member
EXPERT BUILDER
Join Date: Dec 2010
Posts: 345
Originally Posted by outlaw256
ive been racin and buildin cars for 40 yrs and i still cant see how in the hell a 4/7 firing order is going to improve anything. things look good on paper but ive not seen any proof.
#14
Senior Member
MASTER BUILDER
Join Date: Sep 2005
Posts: 134
The 4/7 swap is to help with fuel air seperation for #2 cyl. When the car is moving forward and everything in the intake is going to the left rear for 5&7 then has to change and go to the right front.It does seperate 5&7 firing but it puts 2&4 together.I don't know if any one will get anything from the way I said that or not.Bill.
#19
Senior Member
RACING JUNKIE
Join Date: Mar 2008
Location: falkville al
Posts: 1,764
Originally Posted by wazup
DD chevys rule and mopars drule and fords are just another product of mopars so whats left :lol: :lol: :lol: :lol:
#20
Senior Member
EXPERT BUILDER
Join Date: Dec 2010
Posts: 345
Originally Posted by outlaw256
Originally Posted by wazup
DD chevys rule and mopars drule and fords are just another product of mopars so whats left :lol: :lol: :lol: :lol: