Boat on its last leg to the UK

connorssons wrote: Very cool boat! remember seeing it for sale, way out of my league to fix. that boat has more class then glass

Thanks Jeff, and congratulations on your 2 new boats you have added to your fleet

Riley wrote: Billy, how do you add oil to that? Nice looking engines. Eventually they upgraded them to down draft carbs.

Nice Looking engine there Bruce.

Billy, they're both good, but you were talking about "changes made in those days to upgrade and sell the newest motors available to the boating public.........." and they did end up with down drafts. The brochures do show how CC modified their boxes for them. As far as the Weber thing, mine will be replaced with a goldish one next year, but I probably won't change brands because it runs so good with it. I guess you got a pencil neck funnel for your oil, good idea, but you may want to flip those valve covers over before you tighten them down.

Bruce,
I feel you are very mistaken with the Y block and a downdraft. In a marinized version, it always had the YH's. Yes, CC changed the dog houses but that was for the 289 series of Interceptors.

Billy is absolutely correct that the problem with the side drafts is not the carb but the people who don't know how they work and shouldn't be fiddling with them.

He's also correct that there isn't any performance gain with the 4bbl. I think you'd be surprised with the CFM rating on the YH's!!!

Bruce, I would question that 260/289 Intercepter side draft. I have never seen nor heard of such a set up. Would you please share pics or other proof this was an option.352/390 I would say YES but not the 260...............Billy

Riley wrote: Page iv of the yellow Interceptor manual. I'd post a pic, but can't figure out how to.

8122pbrainard wrote: TRBenj wrote: Riley wrote: Page iv of the yellow Interceptor manual. I'd post a pic, but can't figure out how to. Bruce, This picture Tim posted is a Y block. I too have never heard of or seen side drafts on any engines except the Y blocks and Gray's 327 AMC engines.

Pete, put your glasses on. Look at the valve covers, location of the oil filter and the thermostat housing. And the dizzy! It's a 260. In the same manual it also shows a picture of an FE block with side drafts.

Bruce, I would question that 260/289 Intercepter side draft. I have never seen nor heard of such a set up. Would you please share pics or other proof this was an option.352/390 I would say YES but not the 260...............Billy

boat dr wrote: Bruce, I am not taking sides here, but you need to put your glasses on as well. My reasoning on the dual side drafts 260/289 were to large to fit inside the engine vally. The pics show a single carb

I thought we were talking about side draft set ups in general, not specifically singles or duals, but ok. I guess it depends on what you mean by side draft.

Alan, This was posted on here by 64x55

Okay, here we go � This reply will be really messy and disconnected (sorry) but has some good info. on the YH carbs and a possible CFM number we were discussing above:

Carb Doctor web site's email = doc@carburetor.ca <doc@carburetor.ca>
I e-mailed this guy with the question: How many CFM for the Carter YH?
Hopefully he'll pass some info. back my way.
Carb Doc Phone # : 780-968-6622

Nice diagram with lots of data from a 1952 to 1955 Nash car (Ambassador) that used YH carbs at this site:
http://oldcarmanualproject.com/manuals/Carbs/Carter/Nash/pages/p_%2040_jpg.htm

Old Corvette web site � 6 cyl. Used the YH Carter carb:
http://www.carburetor.ca/pdf_manuals/Carter/YHmanuals1.pdf
or:
http://www.tocmp.com/manuals/Carbs/Carter/YH/index.htm
(same thing � "non pdf" � i.e. just click on a page to view)

Corvairs used them too...

Here's a site (Black Hawk Engineering) that seems to indicate that the YH's original CFM was 128 (CFM) if I'm reading correctly:    
http://www.blackhawkengr.com/
Quote from site:
"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."

If 128CFM is correct, I guess that means "two" would do only 256CFM?

Another link to the same info. (same site). It's a fuel injection throttle body for turbosharged Corvairs that also used the YH carbs (Wow! Pretty interesting stuff!):    
http://www.blackhawkengr.com/Black%20Hawk%20Engineering%20-%20Bolt%20On%20Turbo%20Fuel%20Injection.htm

Ooo! Another site that says 128CFM --- "4 each Carter YH (sidedraft) carbs from a 6-cylinder Corvette bolt to the triangular flanges.......I think that Turbo Corvairs and some Nashes also used these carbs. I wonder how well it ran with that setup? You'd think it would be better with a divider in the runners...?The carbs I think are 128 CFM each X 4 = 512 CFM. You are right, sounds kind of undercarbed for a 331. At 4800 RPM it should use 542 CFM (if my math is right)."
Site Link:http://caddy500.com/index.php?topic=336.25;wap2

And here's a cool site that shows what CFM you should have based on the c.i. vs the max RPM's expected (recommended):
http://www.buicks.net/shop/reference/carb_cfm.htm
This stie also has a nifty "enter your RPM's and C.I.'s and get your needed CFM for a carb" chart!
Or an equation to do it by hand.

And another similar site: http://slitherclothing.wordpress.com/2007/06/29/how-to-calculate-correct-carb-size/

In each case, it looks like, if you use the 312 Interceptor as an example, it yields a CFM a good bit higher than what 128CFM x 2 would be (256CFM), assuming the two sites referenced above are right about only 128 CFM for the Carter YH side drafts.

Man, this is almost as much fun as playing with Propeller Calculators, but I'm whipped from staring at the computer screen to long! I think my eye sockets are gonna need some PB Blaster soon if I don't stop now!

Inboards Rule!


Link to thread

81nautique wrote: Thanks Roger I was just on carbdocter and found the same thread. 128/256...sounds like we're talking computers about 20 years ago.

I know my cell phone has more power than my first PC I think it means I'm old

Thanks Joe, looks like its still up in the air for CFM on YH Carter

Riley wrote: Pete, put your glasses on. Look at the valve covers, location of the oil filter and the thermostat housing. And the dizzy! It's a 260. In the same manual it also shows a picture of an FE block with side drafts.

Bruce,

Riley wrote: 8122pbrainard wrote: Riley wrote: Pete, put your glasses on. Look at the valve covers, location of the oil filter and the thermostat housing. And the dizzy! It's a 260. In the same manual it also shows a picture of an FE block with side drafts. Bruce, It's ok Pete. They aren't race engines.

They are closer than you think Bruce.Intercepter was very weight and size savy in those early years.They were casting 95 percent of thear stuff, for both reasons. Size and weight were a selling features to the boat builders, while HP and top speed sold the consumer.
The engineering dept. was at the top of thear game with the newer style "square exhaust" not only are they lighter and less complicated to cast, they reduced enine width by 1 full inch.
One inch is not much unless it is inside a boat........The same goes for weight, look at all the aluminum cast parts that were used. This adds major dollars to the introduction of a marinized engine.
I think little is stock on your Y block, even if it is a Intercepter, it matters little. Use the boat and enjoy the Y Block rumble.....

Just got a call the boat will be delivered on Thurs, which is great but it looks like d*ck Turpin is still alive and well, have to pay an extra charge for rent on container and storage at the port for 4 days, the fact they shut the port for snow for 4 days cuts no ice,pay up or we charge by the day till it is and must have $200.00 by tomorrow to release for Thurs. It just shows how rubbish the UK is I pay because it snows.

Roger ,at the rate it's going, the Intercepter and the Starflite will reach your shop at about the same time.
Truly a marrage made in heaven, a boat from Canada, a motor from Louisiana all loaded on a big boat, going to Roger's house...Cool Beans
There is a Santa..............Bah Hum Bug