Chasing the Ghosts of LeMans - Thunder - Project 487 Super Snake

[FETorino]

You could run one of Dougs POP 4.375 steel cranks and a hydro roller and make a bunch of hp and torque all below 6k rpm.

The Ports are one piece but don't forget the valve job that can make an even bigger difference in flow especially at low lift numbers.

[Ripped]

Originally Posted by FETorino

You could run one of Dougs POP 4.375 steel cranks and a hydro roller and make a bunch of hp and torque all below 6k rpm.

The Ports are one piece but don't forget the valve job that can make an even bigger difference in flow especially at low lift numbers.

Hmmm yeah checked out the 4 3/8" crank, but a lot more issues, including camshaft clearance.

I have all the ports pretty well roughed out. I started unshrouding the valves, tonight. Once the valves are unshrouded, then the plugs, chambers, and bowls.

Lastly I polish the exhausts, and chambers.

[FETorino]

Originally Posted by Ripped

Hmmm yeah checked out the 4 3/8" crank, but a lot more issues, including camshaft clearance.

I have all the ports pretty well roughed out. I started unshrouding the valves, tonight. Once the valves are unshrouded, then the plugs, chambers, and bowls.

Lastly I polish the exhausts, and chambers.

Don't know who's selling you the story of cam clearance with that size crank. I'm running a solid roller that is bigger than any usable hydro and no issue there, no real issues with the 4.375 stroke period except the upcomming traction problems. Now 4.5 like Jay Brown originally went to run in his HR that's a different story.

[Ripped]

Originally Posted by FETorino

Don't know who's selling you the story of cam clearance with that size crank. I'm running a solid roller that is bigger than any usable hydro and no issue there, no real issues with the 4.375 stroke period except the upcomming traction problems. Now 4.5 like Jay Brown originally went to run in his HR that's a different story.

Well, maybe I'll have to do more research.

For now I got another few hours of porting and polishing done. I decided to work on the combustion chambers. UNshrouding the valves, spark plugs, and chamber.
I have one head roughed out, and a system now, for what I want to do.

After the chambers, I'll tackle the bowls.

[Ripped]

A few pics of the combustion chamber work (whew this takes a long time) Work on the chambers, unshrouding the valves, a little radius work around the spark plug relief, and a polish to 800. Once the chambers are all done, I'll CC them, and after that they get a final polish.

[Ripped]

Well back to the grind, or should I say grinding.
House renovation project is finished.
I think I have the intakes on one head done, on to the next head, and then the exhausts.

[Ripped]

A few more pics, of the head work. Close to 2/3 of the way through, I think.

Sometimes I get the idea to do things a little different,as the heads progress.

Generally pretty close. A little more polishing of the exhausts and chambers.