Hello,
I'm currently working on my 68 small log head.
First, I just wanted to state that I am fully aware that the small log head isn't worth porting/upgrading/throwing money at it, that the large log or aluminum or OZ 2V would be better choices. Two things make it hard for me to upgrade to one of the mentioned heads: I live in europe and they are hard to find online and I am obligated to keep my L6 as stock locking as possible to keep my vehicle registration (my 68 Mustang is registered as a classic car).
So I want to get as much out of my small log as I can, with porting, back cutting of the intake valves, 1.65 roller rockers, higher compression (it will run on 98 octane fuel only) and a progressive weber 32/36.
My head already has hardened seats on both intake and exhaust installed, therefore I am keeping thee stock valve sizes.
I am reusing my stock cam (but 4° advanced instead of the original 4° retarded) with a 1.65 roller rockers, the max lift of the valve is 0.381".
I will show a little bit of progress on the head here. Maybe there are other people out there who are interested in upgrading the small log. There is a lot of data on the large log and aluminum heads, but not on the small log. I appreciate every kind of advice on how the make the head perform better!
And to measure the results, I put the mustang bone stock on the dyno when I got it. Load o matic distributor, standard 2" exhaust with manifold, holley 1940 carburetor was the starting point. After all the mods to the head and some upgrades (progressive ignition HEI distributor, Weber 32/36, Cold air intake from the wheel well with K&N air filter, 1.65 roller rockers, pacemaker long tube headers and 2.5" single exhaust) I will get it again on the dyno to see the tq/hp gains
I'm currently working on my 68 small log head.
First, I just wanted to state that I am fully aware that the small log head isn't worth porting/upgrading/throwing money at it, that the large log or aluminum or OZ 2V would be better choices. Two things make it hard for me to upgrade to one of the mentioned heads: I live in europe and they are hard to find online and I am obligated to keep my L6 as stock locking as possible to keep my vehicle registration (my 68 Mustang is registered as a classic car).
So I want to get as much out of my small log as I can, with porting, back cutting of the intake valves, 1.65 roller rockers, higher compression (it will run on 98 octane fuel only) and a progressive weber 32/36.
My head already has hardened seats on both intake and exhaust installed, therefore I am keeping thee stock valve sizes.
I am reusing my stock cam (but 4° advanced instead of the original 4° retarded) with a 1.65 roller rockers, the max lift of the valve is 0.381".
I will show a little bit of progress on the head here. Maybe there are other people out there who are interested in upgrading the small log. There is a lot of data on the large log and aluminum heads, but not on the small log. I appreciate every kind of advice on how the make the head perform better!
And to measure the results, I put the mustang bone stock on the dyno when I got it. Load o matic distributor, standard 2" exhaust with manifold, holley 1940 carburetor was the starting point. After all the mods to the head and some upgrades (progressive ignition HEI distributor, Weber 32/36, Cold air intake from the wheel well with K&N air filter, 1.65 roller rockers, pacemaker long tube headers and 2.5" single exhaust) I will get it again on the dyno to see the tq/hp gains