It usually stays on but it doesn't have to, it doesn't matter on or off so it's just usually left on.
I am assuming you will take Lana for a ride in the blue monster eventually. Does she REALLY know what you are making in the basement?
Says the man embarking on one of the most audacious modifications of all time... So do I, stock external aesthetics are what you want. All the best, Andrew.
i started working on the heads this morning. The first thing that need to happen is the intake seats and guides need to come out. I like to cut them out so I ran a 7/16 end mill through the guides, grabed them with pliers and they pretty much fell out. For the seat I cut one side nearly though (easy to tell because there is a groove you expose before hitting aluminum), then I drop in an old valve ground to fit in, a couple quick hits with the mig welder, tap the valve and seat is out. I'll leave the exhaust side for now I think. The guides will need to come out at a minimum becasue I going from the 7mm ferrari stems to 5mm motorcycle stems...not sure about the seats yet. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Nice trick on the seats Mark. I love to check this thread at least twice a day. Never know what jewel I will find. Thanks for all the extra work on this thread along with all the photos. Tom...
I got the seats and guides out of the second head. Now I think I need to do some rough porting. I guess I'll try and make a few templates off of port 1 that is already mostly right and try to copy it to the others. It should be easier to do the welding that need to be done once the ports are opened up I'm thinking.
I started roughing the ports in to shape. I measure of port 1 to get the position about right them blended into the mill cuts I did last week. Head 1 is done, on to head 2. This stuff is going to be pretty boring....I'll bet I'm looking at 100 hours of grinding, welding, grinding, flowing, grinding and the pics will all look about the same every day but it's got to be done. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
This whole project is THE most amazing fabrication project I've ever seen. A distant second is the Saturn V Whould you track this beauty, or do you have to finish it before making that call?
How can it be boring? Reptitive yes, but it is one of the most critical stages dtermining how the engine will run, setting the parameters for all that's following. Most of us would throw up hands in despair at the sight of these 'demolished' heads!
I tell Lana it all you guys fault for egging me on....alls I wanted to do was give it a good wash and polish, this whole mess is you guys fault
No tracking. The car doesn't have appropriate safety equipment and I don't want to see it smashed to bits anyway....and I know how I drive.
I'll take the heat. You're making all our projects seem so minor: "Sweetie, come on, look at what this guy is doing. I could be doing something like that instead?"
Exaaaactly! SO should any of you happen to stop by you will now understand the looks you get from Lana To put all your minds at easy I put port 1 back together this morning so you can see that it is in fact possible. I was thinking I was going to go grind and weld these patches in all the ports....but it's still kind of hard to tell ecatly where I'mm supposed to be working. It was about a year ago I talked about this last so I'll remind everyone that I'm increasing the valve to valve distance by 2mm so the 5mm oversize valvs will fit. I think I'm going to change plans a little and go rough in the location of the seat and guide holes and go from there. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
I through the head on the flow bench to see what damage I'd done to port 1 and it appears to have gained 5 cfm and is at 157 at .450 lift. I need to re-check that everything is sealed properly to be sure and spend some more time messing with it and re-work the test manifold to fit now that I milled off the flange I had been bolting it to. Image Unavailable, Please Login
I messed with the flow numbers in the simulator.....it doesn't really care about the extra 5 cfm intake flow.....appearently all the time I spent optimizing around the numbers I had got me about everything there was to be had. Oh, and I got the 2 last pieces of tubing I needed for the last collector today.....I'm kind of on the heads now though so I'll just stay on the heads for nopw at least.
I checked everything and ran a full flow curve. Lift----Then ----now .050----30 ------26 .100----56.5-----50 .150----77 ------77 .200----96.5----106 .250----112.5---120 .300----124.5---133 .350----137.5---143 .400----147-----152 .450----152-----155 .500----152-----157 I lost a little a low lift which isn't a bade thing really.....I think they will come up though when I set the exhaust valves in a bit lower. I did the first curve with the exhaust valve holes plugged with clay instead of valves because I found the exhaust valves were just too high and interfered with the intake flow but I didn't want to mess with the clay today so I though the valves in.
Just catching up on this epic thread, and wanted to address this comment about the motorcycle 4-2-1 header This is exactly what you're seeing, and it's absolutely standard practice in 4cyl bikes now - has been for a while. The mixed pairing gives you most of the topend of a 4-1, and most of the midrange of a 4-2-1 conventional pairing header. It's a compromise - as most things are.
I was there for several hours a couple months ago and never saw this mythical creature Lana!!! I don't think she's allowed downstairs. Mark, Merry Christmas. I have a few questions for you. I'll give you a call this weekend if you're going to be around and not swamped with holiday duties. Spang
