Is 426ci 360 a small block?
So j-dot-rob, because of you, continuing to post, having practiced wading through the back yard. I was ashamed and thought I might try following your good example. Therefor..........
Once upon a time you could buy these LAX heads with no intake pushrod holes in them. When we entered the contest in 2010 they wouldn't let you use those heads so I never bought any. Now trying to make these heads from 2010 work on the stroker I had to figure out some way to get the cross sectional area up some.
The trouble is, you still can't open the top of the pushrod pinch/port roof as wide as the middle, because you end up grinding right out under the valve cover. We already have the non-offset Chevy 1.5 rocker arms from 2010, so we decided to do the best we could with what we have.
I did figure out that we could machine the top of the head above the pushrod hole and into the port and press in a solid bar with an oval button head, machine in a pushrod hole farther away from the intake port, use an offset rocker and open these heads so there was no pushrod pinch. As all this engine has to do is make as much horsepower as it did the last time, I think we are going to be okay with the set up in the pictures.
And before I go through all that other work, I think I'm going to go for the BPE cylinder heads.
Still, it's going to be interesting to see if these iron heads will make more power than the aluminum heads, as the iron heads have a slightly larger minimum cross section and the flow bench says a lot more air flow up top.
So j-dot-rob, because of you, continuing to post, having practiced wading through the back yard. I was ashamed and thought I might try following your good example. Therefor..........
Once upon a time you could buy these LAX heads with no intake pushrod holes in them. When we entered the contest in 2010 they wouldn't let you use those heads so I never bought any. Now trying to make these heads from 2010 work on the stroker I had to figure out some way to get the cross sectional area up some.
The trouble is, you still can't open the top of the pushrod pinch/port roof as wide as the middle, because you end up grinding right out under the valve cover. We already have the non-offset Chevy 1.5 rocker arms from 2010, so we decided to do the best we could with what we have.
I did figure out that we could machine the top of the head above the pushrod hole and into the port and press in a solid bar with an oval button head, machine in a pushrod hole farther away from the intake port, use an offset rocker and open these heads so there was no pushrod pinch. As all this engine has to do is make as much horsepower as it did the last time, I think we are going to be okay with the set up in the pictures.
And before I go through all that other work, I think I'm going to go for the BPE cylinder heads.
Still, it's going to be interesting to see if these iron heads will make more power than the aluminum heads, as the iron heads have a slightly larger minimum cross section and the flow bench says a lot more air flow up top.