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I opened up the engine simulator imported and corrected the old files I had to work with the newer software version. I looked at my old thread....but I was thinking about boats back then. I got looking at a schnieder 262h-10 hydraulic (216@0.050") with bigger valves and good intake and 170-180hp, kind of what you'd expect. but it was the boost I really was trying to look at and....if I want to get near 300hp it ain't gonna happen with a roots blower. A screw type blower will get me there but after playing for several hours.....I really like a Vortec V1-S. I've always thought the centrifugal stuff was the worst of turbo and supercharging but on an engine that already makes mountains of low end this this really flattens out the torque curve pretty nice.....I kind of like it, at least on the simulator. I played with some turbo options that are pretty nice too but nothing I liked better than this yet.
This is stock (which looks about right) v the built engine.

I wasted another evening on the engine simulator. I've decide it just doesn't understand how anything can flow this bad o_O. I have a book, "flathead ford V8" and its got a bunch of builds in it with dyno numbers and its got typical flow numbers. The lincoln has the same valves as the V8 and the same people designed it so I figure its pretty safe to use the data. If I use the stock ford flow data, I need to time the cams at 130/115 to get the hp peak at about the right rpm, actual cam timing and the peaks is 3000ish not 3800ish, but I get 120hp which is probably spot on. When I plug in the V8 engine data from the book, I need to roll the cam and still can't quite get the hp. But when I take the ported v8 flow and give it V12 cylinder displacement (so 50% more flow/cylinder than a V8 has) though it seems perfectly happy, 273hp happy which seems very believable when V8s are making 200-220 with the same flow numbers in the book and the V12 was 125hp when the V8 was 100 with the same flow
(I think) and same 2 barrel carb.


then added a screw type blower with an intercooler and BAM! 400hp
attachFull6483958

The main concern I have is the V12 is 8 port intake and exhaust. The way the ports are mated in/ex there is not less than 240 degrees between events......the 262h cam is 216 degree @ 0.050" but they says 262 gross duration so there will likely be some cylinder to cylinder interference ...but not horrible and longer duration probably doesn't really help m

forgot....at 400hp if I stay under 1500lbs it would be quicker than the frankenferrari

Only 400? I think I posted a link to Ron Mains Flatfire engine years ago over on Jalopy - stroked, port swapped, vortec blown flathead. 700hp, 300mph at Bonneville - imagine what you could do with Lincoln??

Time to solve the rod problem and China is almost certainly the answer

This caught my eye....strange for amazon



Which round a bout led me here after the "OOOOH, china makes custom shit cheap!"


and they said no problemo......but 2 set min order. I found another guys who want 2 sets so its go time! I suspect once the design is good others will speak up but doesn't matter, my problem will be solved or will ber once I finish figuring out what a Lincoln rod is exactly

I see the word custom and start thinking ...yeah, it should be custom! Why is the small end so wide? and why is the pin so far down the piston? I don't know.....but this rod seems fine for a 4.5 or 4.625 stroke, I have 3.75 and I'm certainly not running stock replacement pistons so it seems like making an optimized piston/rod set is the way to go but I'd love to hear if someone has a reason I shouldn't just fix this???

CAD model of the 42up Lincoln rod, but stretched to 7.75" long and small end width cut to match big end.

I saw a single scat flathead ford rod on ebay and bought it to see what is acceptable.





If I'm being honest its kinda scary looking. The originals "solved" the rod to bore clearance by making the studs part of the rod forging so I guess this is an improvement....but wow.

On the plus side its pretty light at 558g. The stock lincoln rods are about 632g. The version I sketched is about 825g which I thought was good when I google BBDC and found 810g for a 6.635" long rod so I figured I was about where I should be on everything. so I was pretty surprised at the scat rod weight. I'm HOPING for 35hp/cylinder but planning for 25hp/cylinder, so no where near the 100/cylinder a decent BBC can make..I use 4mm walls on the beam, scat used 2mm so I can probably pull some weight out. but I'm thinking its WAY better to be safe than sorry.

Here is the current state of design. I designed for 3/8 x 1.6" long ARP bolts. I think its pretty strong...I'll do some math and see if I can slim it down a 100g or so.

I decided to print the rod to see it but mostly I want to drop it in the block just to be sure but that will be another day.