Blown alcohol sohc

[Rabidpinto]

Need info for a new build .  #1 blower manifold does the Munro manifold have provisions for a burst panel and water outlet ? I’ve only seen a side shot of one   #2. If no water outlet can water be taken out of back of heads ?  # 3  looking for 526 cid is there enough meat in between with offset boring at 3.375 or 4.44

[jayb]

There is room for a burst panel in the front of the Munro SOHC blower manifold, but you would have to fabricate the panel and springs, there is only a spot for one on the casting.  There is also a 3/8" pipe tap on each side to get water out the front, but you will have to use a die grinder to clearance around the area, especially on one side, because there is not enough room to screw in a fitting.  Obviously a front mount distributor will be required.  Best way to get 526" is to go with a 4.375" bore and 4.375" stroke.  There is no issue with clearance in the crankcase on a cammer, because there are no cam lobes to get in the way of the connecting rods.

[Rabidpinto]

Ya I wasn’t sure on manifold for water , but that’s a lot better than having to pull it out back of heads. Now just have to find one , with him not making any more . As for burst panel I’ll have to see if I can pick up a mount from McAmis and fab it into the back of manifold above the runners. Then fab up a fork style chimney . One on each side of blower. I plan on running dominator efi with msd pro 600 I’ll just have make up some brackets for coils and mount them to the blower mount studs. The ones you made up are sweet . As for bore size that’s what I was thinking about 4.375 just wasn’t sure with only having little over 1/4” between bores, that’s why I was thinking offset boring to get a little more space. To bad Shelby didn’t make a compacted graffite block. I’m new to the sohc so any help is nice. One more thing? How thick is timing cover back plate ? Need to figure out a front motor plate and a crank support if possible. Pics of some ? 40 % od is a lot with nothing on front.

[ToddK]

Here are some pics of the Munro manifold I have.

Front


Rear


Top


Underneath


Hope these help you. You can see the water outlets that Jay mentioned on the rear of the manifold. There would probably be enough material on the front of the manifold rails to drill and tap for water outlets there also.

If you’re after a manifold, I’d be willing to sell this one. If interested, send me a PM through the forum.

[Rabidpinto]

Ya that’s a lot better than what I was thinking. Then it dawned on me about the burst panel , weld a 2” spacer to the top and mill in the front for the mount if there is room for it don’t like the spring type ones. Then I can put the efi injector mixing pot on the back and run lines to the runners. Have to see how high the blower will be out of hood . Don’t want it sticking out like they do with those adaptors on reg or cutting up a tunnel ram looks like crap, it’s just me. Oh ya this will be going in to a 64 fairlane tube chassis car. A few weeks ago ran a cross web site for a guy out in Maryland that makes fiberglass body’s .saw that and instant chubby lol . Just want to build some thing different pro street/ drag week . I’ve been running 385 series engines since early 80s time for something new. This is still 5 years away have to start on girlfriend/ wife’s 64 falcon chassis car big fe on the hose

[gdaddy01]

you have to build two falcons ? one for girl friend and one for the wife ?

[Rabidpinto]

Well it gets lonely up here in the oil patch , what you don’t have a gumare ? Lol  no no no been with the same women for 15 years up here . No tepe creeping for me. So no pics of a front motor plate ? We ant to do it rite the first time not pull threads all out of a $7k block . That’s wye I asked about how thick the timing cover backplate is, maybe weld some ears to it . Any ideals are welcome.

[gdaddy01]

oh  ok  I was just wondering  lol     instead of a three dog night , maybe something else .    cold  makes you do some strange stuff .

[Barry_R]

Timing cover back plate is just sheet metal - probably not thick enough to make a motor plate out of.  The fact that it has a complex cutout, a distributor clearance bump, and it gets sandwiched between the timing tensioner and idler mounts renders a thick fabricated one problematic - but still do-able.  I built a blown gas cammer for a customer and he fabricated his own motor plate mounts from aluminum using longer fasteners and sandwiching them behind the exterior of block visible parts of the timing cover and plate - his work and pretty slick execution.

[Leny Mason]

Hi, well I am doing this right now Paul's manifold is nice a little heavy, the water outlets are taped from the inside not the outside I can't figure out what he was thinking, so I made some nipples that are tapered backwards so the hose nipple goes from the inside out, so it can only be 9/16 hose and MY outlet pipes are 1/2 inch SS kinda small but not a lot of room in there, as far as a burst plate I think You would need to remove the intake to replace the panel if it blew, Mine is a spring loaded plate two springs at 65 lbs each when closed. Leny Mason

[Rabidpinto]

Well finally on my two weeks off, long hitch. I want to thank everyone for there input. Hope everyone had a happy & safe Xmas . On the manifold is there snuff room to mount my efi injectors on ports , maybe have to mill side of blower mount? As for the coolant fittings on the small side I could drill & tap the rear passages and pull coolant out there to not just let it pool in the rear of engine . Cool in front hot in back saw it done on some roundy round cars. As for bust panel has to be sfi per class rules , so will have to mount and weld spacer for it

[Leny Mason]

I drilled My manifold for injectors, It worked out fine I never thought about using the back to get the coolant out, a lot more room back there  My manifold came with a blow off plate It was crude but I reworked it and it turned out fine.