Budget Boat Build 233 Eclipse
02-09-2010, 06:58 PM
#31
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Cool budget build. I don't think the heads you chose are a bad choice. they have d-port exh should be about 170cc on intake side a good basic pocket port on the bowls and gasket match and the right cam should make good power with loads of bottom torque. would recomend a good dual plane like the performer air-gap rpm and a 750 double pumper. should make power to 5000+ and the torque to get you on a plane quick with the right prop. jmo
02-09-2010, 07:09 PM
#32
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Thanks Dave, I like the Performer manifold but again budget is making me use stuff I already have. I have a RPM manifold so thats what it will get. It will get a 750 cfm but I haven't found the right deal yet. Needs to be square bore with the RPM. I agree the heads are decent but because of the small chamber I had to use pistons I might not have otherwise. I would have liked to use flat top pistons but my compression ratio would have been out of control for dock gas.
02-09-2010, 08:48 PM
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Budgets can definetely keep money invested down to a minium, I've put the majority of mine into rebuilding the boat so I'll have to save the engine for later down the road. Right now with the original Merc 350 I'm still hitting 50mph. What kind of speed and H.P you looking at when done?
02-10-2010, 06:50 AM
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02-10-2010, 09:53 AM
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Budgets can definetely keep money invested down to a minium, I've put the majority of mine into rebuilding the boat so I'll have to save the engine for later down the road. Right now with the original Merc 350 I'm still hitting 50mph. What kind of speed and H.P you looking at when done?
02-10-2010, 10:19 AM
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No trim tabs, either a 17 or 19 pitch prop... I can't remember which. I know he tried to go two sizes bigger, but the motor wouldn't spin it. He is maxed out at prop, but he is spinning an alum.
I should qualify my statement and say that he is running 45 on Gps, and his spedo is reading 50ish...
I should qualify my statement and say that he is running 45 on Gps, and his spedo is reading 50ish...
02-10-2010, 10:34 AM
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No trim tabs, either a 17 or 19 pitch prop... I can't remember which. I know he tried to go two sizes bigger, but the motor wouldn't spin it. He is maxed out at prop, but he is spinning an alum.
I should qualify my statement and say that he is running 45 on Gps, and his spedo is reading 50ish...
I should qualify my statement and say that he is running 45 on Gps, and his spedo is reading 50ish...
I have a gps and used it to check my speed. my speedo currently doesn't work and I haven't taken the time to unblock the pickup tube....I'm running a 21p mercury mirage ss prop with trim tabs. I also have a merc ss 23p its good for top end but not the holeshot. The 21p has good torque and speed with my 350merc.....
Its all in the trim.......
02-10-2010, 11:04 AM
#38
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The RPM manifold should work fine, I ran that manifold on one of my engines with a 1" open spacer for a little more upper end power. I went from there to a Victor Jr. which was not nearly as sociable around the docks. the RPM will have a great vacuum signal
02-13-2010, 09:38 AM
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I'm curious to know, have you checked your stringers yet? When I got into mine I thought I was only going to have work on the engine area but soon after I had half the damn deck open...
