Torque & HP Open Discussion

Andy wrote: If you have no one local, I haven't found anybody that I liked. you could give these guys a shot. They're on the east coast somewhere I think. I've gotten some things from them in the past, always easy to deal with, and I've gotten some off things. Mandrel Bending solutions

Thanks Andy, may come in handy

My Commander style manifolds were paired with a 90 degree Piece so not a direct comparison I am afraid. I am sure there is something that can be done for more even flow, maybe even a simple diverter on the end of your hose fitting might help. But I think someblue silicone high temp exhaust hose might be the real trick.

Looking good though, and your exhaust temperature might change a lot with tuning so I wouldn't be getting too concerned about the hose temp yet.

what happened to the "airline" or something alike? I still got some pics of a boat waay loaded with people and a Big block engine.

Is that Matrix boat a Malibu splash???

Luchog wrote: what happened to the "airline" or something alike? I still got some pics of a boat waay loaded with people and a Big block engine. Is that Matrix boat a Malibu splash???

The "airline" caused a huge controversy in the Wake community over here. Lots of rumors etc they never really hit the market a few were built though. I think somebody else has the moulds now maybe we will see something eventually.
The Matrix are a quality boat. I looked at them just before I imported my 89. They compare very well to a Malibu Sportster or Response same price as Sportster but size and fitout of Response. My favourite is the Sorrento closed bow which is a great ski boat that has sub floor floodable ballast that pumps out a good wake for its size. Just could not justify the AUS$45000 investment. I like the size and crossover capabilities because we do a bit of everything but are not good at any of them

I don't believe that the feed to the mainfold is correct it should have been to the lower fitting, forcing the water up and out, the way it is currently, air pockets can and will be created, and that's not good read cracked mainfold hydro-locked motor. The way it currently is plumbed is not good for flow or thermal transfer characteristic nor will it help purge the system of air within the mainfolld.

also I would try varying the amount of flow to the elbow and watch how the flow changes as it exits the elbow, try using the other fitting to the elbow and see what effect that has, use both fittings and check the effect that has, but I believe your going to need to use both ports of the elbow to cool it properly this will force water over the top of the elbow and provide much better thermal tranfer to the water.

you have to slow the flow on these manifolds down, your creating a spray internally automaticly from the reduced dia of the fitting, so feeding at the same pressure thru the same 1" hose is not good, 1" ID hose goes into a 3/8" fitting can you say nozzle because that is what is happening.

there is much more to a water jacket design than meets the untrained eye.

Alan have you reworked the elbows, look at my elbows on my SBC Edelbrocks.

Those elbows would probably be more restrictive than Alan's. Which negates the whole purpose of the exercise. From memory that is probably why the Edelbrooks flowed better in the first place.

Alan don't forget to make sure your exhaust flaps are in good condition. The log style of manifold is more prone to a backwash without the riser section.

Allen the elbows I had the fitting was on top and centered, not sure if this makes a difference, but with the fitting to the side I don't see how it's not going to create a swirling type pattern in the water jacket. With it being on top then it's hitting a wall and slowing the flow and creating turbulance as soon as it leaves the fitting and enters the water jacket.

lewy2001 wrote: Alan don't forget to make sure your exhaust flaps are in good condition. The log style of manifold is more prone to a backwash without the riser section.

While this is a true statement, the flaps still arent 100% necessary. They didnt start coming on CC's until sometime in the 70's... lots of boats out there with log manifolds and no flappers. None on either of my Skiers!

JoeinNY wrote: Any updates here Alan, I am finally in possession of most of my parts and looking for inspiration as I start putting in the long hours of assembly...

Yes Joe, I'm ready for a water test. Put the new stainless elbows on and the cooling problem disappeared. I think the rubber hose just couldn't disipate the heat but the steel run nice and cool.

The other thing I finally got accomplished was to install the air fuel sensor. It's a pretty neat setup and I'm anxious to get the boat in the water and play around with tuning it. I made an aluminum plate (polished it ofcourse) and mounted the wide band comtroller and gauge down by an engine mount.

I'll use the gauge for tuning mixture at idle and then it hooks up to my laptop with datalogging software for tuning at other rpms/loads. Hopefully if I understand it I'll be able to tune for proper jets, powervalve and WOT and not have to worry about burning holes in pistons chasing the CCFan boat around!

I'll post a few pics tonight.

Keep us up to date on your assembly, the horsepower gods have been pretty quite this winter and it's time to make some noise.

that's just such an awesome setup you got there...

Roger, they're high temp silicone bellows by Trident Marine. I got them here

Make sure you're sitting down when they give you the price!!!

If you don't need the high temp they are available in regular rubber at about 1/4 the price from the same place.

Anybody have a source for an angled carb spacer? I want to level the carb off but I only have about 3/4" of clearance left at the high side(front)of the flame arrestor.

Ouch !!! They really like those bellows....

ALan

what info you need to desktop dyno my upcoming engine setup?

sebastian