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62 wood
Grand Poobah Joined: February-19-2005 Location: NW IL Status: Offline Points: 4527 |
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make sure you scroll the above pic sideways!!!
you guys are just jealous! |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7952 |
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Steve, sounds like you got it covered. It's just bolt ons and easy to convert if you ever want to, and the padded engine box is easy to convert as well. It's not like you are going to ruin your boat. The only down side if you convert to side drafts is getting used to the loss of power from going to 2 1 barrels from a 4 barrel.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Bruce, I don't feel this is true since those YH's can handle plenty of CFM's. CFM specs are hard to come by but Craig (64X55) who has a X55, did do some reasearch on them. From a good source, he found out each will do about 225 to 250 CFM. The only advantage in my mind with a 4bbl, is you have the luxury of having the secondaries kick in when needed. Take a look at the bore size of a YH sometime - they are big!! |
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62 wood
Grand Poobah Joined: February-19-2005 Location: NW IL Status: Offline Points: 4527 |
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Here is a quote taken from Black Hawk Engineering . They make custom metering rods, etc for the YH. ......."""The throttle body has a 1.83" bore to fit the F flow (180 HP) turbocharger inlet bore. The Performance Trends "Engine Analyzer" simulation software predicts that the throttle body will flow 256 CFM versus 128 CFM for the original "180 HP" YH carburetor. With the boost limited to 12 PSI for longevity, Engine Analyzer predicts 193 HP net versus the 148 net HP of the stock "180 HP" system. The EFI system is able to produce better fuel economy despite generating more power. I will also manufacture smaller throttle bodies for the B-flow (150 HP) turbochargers."""... They are talking about a replacement throttle body on a turbocharged engine. The "software" predicts 256cfm vs 128cfm of the original YH carb.. ...Anyone got a hole saw big enought to cut a hole for the flame arrestor? |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Bruce where did you get those "FACTS", my 312 is rated at 215 HP w/2 YH Carters.How much can I gain w/4 barrels vs the twins? Do you have different HP rating with a 4 barrel or you just pulling numbers out of the AIR??? If so back them up with data, not "hear say". Now back to the story....... |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Steve,
It can be done!! There really isn't anything hard about rebuilding YH's!! The trick will be getting them back on the engine and seeing if any tweaking is needed. By now, you should be a "master tweaker" of the YH's!! Yes, there were a few extra parts left over in the kit but that's what makes a good mechanic - making it work with missing parts!! Actually, after talking with Daytona, the YH kits are universal covering all 4 generations of the carb so, some of the parts in the kits aren't used on all of the models. They sure did throw in the extra gaskets though!! I'm just trying to keep you from cutting a hole in the top of that dog house!!! There is nothing wrong with the YH carbs!!! |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Steve,
You mentioned using an aluminum HVAC part and polishing it to mount on the top of the dog house. I just checked McMaster and they have this one available up to a 12" diameter. Cool looking!! Go for it!! And, the 12" is only $32.00. You could probably even find one at Menards cheaper!! Then, you need an angle ring and some drywall screws and the job would be done!! |
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62 wood
Grand Poobah Joined: February-19-2005 Location: NW IL Status: Offline Points: 4527 |
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Pete,
I was thinking more of a pc of furnace plenum, lay it down on top of the doghouse and cut the front out for forced air induction ... |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Ok, got it!! Hey, get a floor sweep and mount it upside down. Take the door off it and put a length of ducting on it so the top scoop area is over the windshield and wow, you'd get plenty of forced air induction. You could even do some foam gasketing around the flame arrestor to force the air directly into the carb. |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Pete we should be able to pull this off, but it seemed "SO SIMPLE" at the start.Steve and I may start swapping boxes via UPS.One mans trash is anothers treasure ????? I vote for a Pro Stock auto scoop
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62 wood
Grand Poobah Joined: February-19-2005 Location: NW IL Status: Offline Points: 4527 |
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Actually I think its more like .. "One mans treasure is another mans even more desirable treasure!" |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Steve, We are both very lucky that we have Billy around!! So, it sounds like I can't talk you out of going non original!! |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Steve,
I feel you may need to change your screen name to something like "Mr. non original Velcro guy" !! |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7952 |
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Carbs look good painted up Pete.
Steve, Ram Air like the GTOs had, I like it! That ought to really boost the hp. |
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peter1234
Grand Poobah Joined: February-03-2008 Location: United States Status: Offline Points: 2756 |
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if its just about getting it running and getting the bugs out try borrowing a good working one.. we used to pass around a good working holley two barrel to each other when we had a new motor or project . it was always a known factor that we couldnt really blame the carb.. gave us time to play with valves or timing or whatever
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former skylark owner now a formula but I cant let this place go
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Steve , so far I gotta a good 4160, fuel pump, thermostat cover...Boxed up........... Whattcha got that I need ??
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Well, I just finished opening up the two YH's again. I forgot to check the metering rod height which is one of the rebuild procedures. They both checked out fine but it sure would have been a problem if they were wrong.
Steve, That NOS YH you got, do you happen to know what "generation" it is? The improvements from gen 1 to gen 4 really improved the YH performance and reliability. I have the gen 4's and keep in mind, mine haven't been opened up since I got the boat (about 1981) and then it was for just a float height adjustment. The really big improvement is the design of Daytona's own needle and seat for the float/fuel level. They make their own for most of their carb kits. It's not even a needle in a seat but a flat face Viton seal (the "needle") that seals off on a convex seat. |
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7952 |
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Steve, I see you haven't installed your intake. Both the side draft and down draft I've seen have an exhaust crossover. I am re installing ours with the truck gaskets which have a plate with a small hole in it rather than the open port. Its supposed to keep it from getting as hot as the open port.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Two rebuilt YH's on the 312. Steve, there really isn't anything different about rebuilding a YH compared to other carbs. I did have to open them up and adjust the float level.
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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I spy a donut? Tsk tsk.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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When I made the new prop shaft, it somehow came out and inch short!! So, it was an easy solution instead of getting another chunk of stainless and starting over!! |
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62 wood
Grand Poobah Joined: February-19-2005 Location: NW IL Status: Offline Points: 4527 |
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So Pete, how do they work? Where did you end up with the floats? btw, I just got my 4bbl intake sandblasted... |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Steve,
The book calls for 9/16 in forward and 7/16 aft. I ended up with 5/8 forward and 1/2 aft. There is also a metering rod adjustment. I set it per the rebuild instructions. Did you ever check it? I didn't put much time on it and will go back at it come spring. I still may need to adjust the metering rods but want to pull some plugs to see how the mixture is. There's no backfiring so I feel it's still running slightly rich. |
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