Mission: You Wanna What? [LOL]

Riley wrote: How many vintage engines actually have marine carbs?

Anyone who has not had a fire yet.

AND is willing to risk having one.

phatsat67 wrote: Thanks Pete!! Tony I also think you are a little to scared of the cross ram power producing rpm. They aren't quite as high strung as you might think. Keep in mind the super stock cars in stock configuration were being shifted around 5800-6000. And going through the traps. At 6500 depending on factory gears. The earlier engines had as much as 13.5 to 1 comp. the factory camshaft was very conservative. The factory max wedge exhaust manifolds were like headers in that they had longer tubes and were designed to scavenge cylinders. With an aggressive camshaft swap they took full advantage of the header like manifolds and power output would go up drastically. With your big inch stroker and good head flow I think it will be easily possible to more than eclipse your 500 number well before the 6000 rpm mark. I also think that the proven 6 bbl application would be your best choice. But a big block with a cross ram would be soooo cool. Can you get flow bench data from 440 source on those heads to aid in camshaft selection?? 440 cross ram Pete, that's another thing I was going mention is I'm not sure there is a marine rated 6 bbl carburetion that would work. The cross ram would probably be easier to tune. 6 pack cars are quirky so most people just but bran new carbs instead of rebuilding.

Jeez, she sounds Swwweeeeet! Can't get enough of that sound!

I was curious if a Hurth reversing trans would help/solve the handling issues with a lefty.Plus with the down angle you can get more under the hood.Tim is right roller all the way I think.The money you save on a reg roller for a 440 would buy most of trans.I am still kicking around putting dual quads on my 511 BBC just love multi carbs and the budget is totally out the window why stop now.

I have a bunch of 1.23 transmissions at the shop. Don't know if you could mate one up to the 440.

Press your own j tubes into the Holley 2 bbl. demon makes six pack set ups. Might check if they offer those in uscga. I love the speed demon on my car.

You'll shoot your eye out...

It will be interesting to see how those 440 source heads work, they are at a price point where I would find them preferable to putting any money into stock heads for an upcoming RB build I have planned.

I would tend towards the dual quad setup as that was a common chyrsler marine offering on the RB's.

Left vs Right certainly effects resale and cool factor, but does also increase the degree of difficulty somewhat. What transmission is on there now? Is it really a paragon? I would expect a borg warner 72 series back there, which would of course be usable after rotating the pump. As for handling on that barge.. don't know that I would bother switching just for handling purposes, maybe a little less lean but it would be a stretch to be too worried about it. I dont think the pcm trans would be worth the effort either, it would likely survive but the gear reduction combined with the torque the engine could produce would be pushing the limits of a 1 inch drive shaft.. so you just start throwing money at the thing and youll find your prop choices arent that plentiful either.   

Roller cam is a no brainer..
remove any ideas or worry about getting it out of the water because you have a "top end" engine/cam/intake. Trying for a stump puller is the road to wasted money. Its a boat, by its very nature it takes less torque to move through the water at lower speeds than higher speeds, combine that with it being a big block stroker and there is no chance your are going to end up with a hole shot that is anything less than spectacularly improved over what it is now.

What are your thoughts for ignition?

What joe said. I'd be surprised if the rh roller was $500 more than a lh roller conversion, especially once you consider all of the other components that would need to change on your current rh engine.

TRBenj wrote: What joe said. I'd be surprised if the rh roller was $500 more than a lh roller conversion, especially once you consider all of the other components that would need to change on your current rh engine.

Tim, The problem is with the blank. I ordered a cam from Lunati a while back and slipped in my RH 440. The oil drive gear is cut on a different bias and if you set the cams side by side, it's like they're in a mirror.

Unfortunately, there are no rh blanks available.

dont forget on any tri power conversions you need to change base plates or plug all idle passages in them . you dont use air screws on anything but the middle carb. also throttle plates are different on tri power front and rear.

TRBenj wrote: I realize that, it's a common problem. Rh rollers did not exist for any of the vintage engines. Roller conversions can run $1500-2000 once you consider the new lifters, valve springs, etc. A rh cam itself (custom blank ground to your specs) should only be in the $750 range, at least that's what it cost for our 454- and that's what I've seen quoted for a 351w as well. An off the shelf lh roller would be ~500 less. The other costs are the same whether rh or lh. Starter, distributor, prop, etc, if required to swap rotations, will erode that $500 savings.

Tim, do you know of anyone other than LSM that can custom whittle a camshaft?

Project will be in a slight holding pattern for a while. I seem to be suffering from flu symptoms.

Check with racer brown. They have done custom mopar cams since the 60s. I'm not sure how big into roller set ups they are. It's been a while since I've put a mopar together with ell these Chevy and ford boat motors haha.

Hope you get better!!!

Ask 440 source if their heads are comparable with a cross ram. I think what you might have heard over the years is that a cross ram will not fit a 383. There was never a factory cross ram for the b block just for the rb blocks ie 413, 426,440.

Yeah, I know the roller reverse blanks are few and far between especially for a older engine like a 440 but it's worth a inquiry call.

Gotcha, glad im not building a HI-PO Righty! I am a man with a roller dream on a flat tappet budget ;).

TRBenj wrote: Not few and far between... non existant. They dont even exist for motors that were made 10 years ago (Ford 302/351w). Luckily there are some outfits that are capable of making custom blanks for any purpose, including reverse rotation rollers. Just costs a bit more than a lefty!

I concur. I checked with Shane Puchon with Lunati in Memphis. Shane remembers doing reverse rotation cams. The guys in his shop remember doing them also. He just doesn't have any blanks left and can't get any anymore. Everyone in the marine world has been forced to go to a lefty or pay the price.

Ford isn't building a marine engine anymore, I believe GM is the only marine engine out there now.

Tonali_III wrote: TRBenj wrote: Not few and far between... non existant. They dont even exist for motors that were made 10 years ago (Ford 302/351w). Luckily there are some outfits that are capable of making custom blanks for any purpose, including reverse rotation rollers. Just costs a bit more than a lefty! I concur. I checked with Shane Puchon with Lunati in Memphis. Shane remembers doing reverse rotation cams. The guys in his shop remember doing them also. He just doesn't have any blanks left and can't get any anymore. Everyone in the marine world has been forced to go to a lefty or pay the price. Ford isn't building a marine engine anymore, I believe GM is the only marine engine out there now.

I was specifically talking RH roller cams, which Im sure never existed for big block Chryslers. RH flat tappets were obviously around (theres one in your engine right now), though those blanks are getting very hard to come by in general (if you were willing to go flat tappet on a performance RH build). They may also be NLA. That seems to be the general theme with RH stuff. The advent of outdrives that can reverse the direction of engine rotation (for twin screw boats) really made the market for RH stuff shrink.