1962 Seacraft

[WoodRay]

Thanks Pete.
I was thinking of using a Facet electric pump as they match reasonably close to what I need i.e. 9-10 Gpm 1.5 - 3 Psi is the range I'm looking for. Facet were OEM for a lot of SU applications so its my current option if I don't succeed with the Weber and decide to convert to SU's.

[WoodRay]

A few more test and tuning runs over the last few weeks. Still dealing with an oil leak from a fuel pump blanking plate (piss weak alloy casting keeps warping when bolted up). I've finally got my new Facet fuel pump so will be fitting it this weekend. I decided to try and load the boat up a bit using a 20 litre steel drum as a floating anchor so I could bed the motor in a bit. Just had to be mindful of making sure there was plenty of raw water flow down the exhaust and to the heat exchanger at low RPM's. All in all it worked well and we managed a good few hours working the engine throughout the rev range. Also manipulated the water flows a bit and got the intake manifold reasonably warm in the vain hope this would help with the flat spot (better fuel atomisation). Not much luck there at all with that problem so now I've bitten the bullet and got two 1 3/4" SU's that I'll adapt to the Weber manifold as I know now its massive drop in intake port velocity when accelerating and only SU's will fix this by design (constant velocity).
Anyway a good day with a sighting of another Seacraft ("Stampede"), sadly we didn't manage to catch up and do the meet and greet thing. Hopefully next time.
The following week we had a real nice flat one so we took the chance for another good run. Now its any excuse to get on the water.....loving this boat.

https://www.youtube.com/watch?v=fBQVrx4cs98

[Alan]

Na all good thanks Greg.

Alan I've gone down to 32mm chokes as initially the bulk of the hesitation was from late starting of the main circuit. I've also probably got an issue with the fuel pump as its a Holley Red which is rate at 100Gpm. I'm running a pressure reducer in the line but I don't have much faith in them and would prefer with running the correct pressure and flow from the right sized pump without the need for a regulator. The Holley is way overkill and I was replacing it anyway as its well worn internally.

Thought so, it's been a long time but from memory Weber only went down to 32mm, so for street cars we used to get chokes made at 26 to 28mm, was hoping the prop slip might work with yours but appears not. The mains usually don't start till over 2500,

[WoodRay]

Alan I've tried F7 and F8 emulsion tubes which have no air bleed holes at the lower range and allow for the earliest possible start of the main circuit. This improved it somewhat but I still feel the manifold is the issue relative to induction port velocity. If the air slows too much when you tromp it the fuel falls out of suspension. No amount of rejetting will fix it totally.
Also DCOE 40 webers go down to 26mm (currently running these chokes in my car).

[WoodRay]

Well at last some success with overcoming the flat spot. I managed to acquire an adapter to fit SU's to the Weber manifold and fitted two HIF6 units. A few test and tune runs at Glenmaggie and we are wrapped with the outcome. It pulls cleanly and hard right from idle to full speed. Now I only have to source some needles to richen things up at full throttle. So far best run has been a consistent 43Mph and the boat is real pleasure to use now. Spent the rest of today cleaning up for Glenmaggie next Sunday!

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[Greg]

Really nice Craig

[WoodRay]

Thanks Greg. Pictures are deceiving though. There's lots more to be done when you see it close up!

[Greg]

There is always something to be done

[WoodRay]

A big win on Ebay yesterday as I snapped up another Grey for a good price. This ones from a 62 Seacraft but the front housing doesn't have "Seacraft" cast into it. I'm assuming not all did???? My current one on the red motor doesn't either but its a later retro fit.
The Tawco stuff will be sold off as I have other gear to get me up to some decent Hp.

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[screwit]

That's a good pick up ! casting around the mounts and adjustable width for bearers looks correct.
Ross