Tweet
Has anyone beside Matt and Joe, done or planning to test methods to cool the 321?
-
-
The 321 has a hole that is higher than the other 300 series motor. -
Scott Clark, Scott Reed, and Adam Allen, ran a bone stock 321 this past weekend in CSHat millville nj and NO issue with cooling the engine. Didnt matter if they were out front or coming from the back (4/5) place.
spider pig, spider pig, spider pig does what'ever a spider pig does.Comment
-
I've been told the 321 Will cool with a 24 degree transom, I'm not sure but some of those boats may have that degree of transom.Comment
-
question? Why did the SORC approve to cut the head?Comment
-
Good question. Anyone have the answer? Several modifications are legal, so not so Stock.Comment
-
Lee, what do you mean cut the head?Originally posted by flatsmoke View Postsigpic
Dean F. Hobart
Comment
-
Dean, in stock and Mod. Racing there is no thick measurements of the head.Comment
-
Can anyone provide some data?
I've heard claims from many people that they're keeping cool but then I see the same people blowing smoke on race dayComment
-
Eric,
There are team out there gathering data on what some modifications will do and how much they help.
Yes there are teams that are not having issues. We were one of them that did not have an issue at Constantine. We threw Joe Pater's 321 on our 20 plus year old Black Pavlick boat and never had an issue. But, I have observed other struggling. I also witnessed several runabouts having issues so as we all know the issue is ther for a lot of people.
Yes the Allen's, Pater's, Reed's Clark's, etc. can make them cool but should this really be an issue. I've come around, last year I was against doing anything. I now see the struggles and how it's hindering our sport for some and am willing to do something different. I personally think we should allow the Tietz cool tool along with do what ever you want to the pick up hole and remove any dimension on that hole. Let the driver decide what he wants to do, take the easy cool tool and bolt it on and for the guys like Joe Pater...let them experiment. If a guy wants to move it up an inch let him. I just want this issue to go away so it can't be used as one of the reason it's hindering growth. -
Great comment Big Don.............'hindering the sport ' and 'creating roadblocks' should be eliminated. Cooling motors is a basic fundamental element of a outboard motor and NOBODY should have to be at risk of burning up Stock Outboard engines. -
Big Don, you are right on. Let them all cool and now let's go race.
-
-
Latest inspection manual Rule 12 page 73 - head milling is allowed on 102, 302 and 321 but not less than min. cc spec.Originally posted by Hydro doc View Post
In the 300 ssh class the 302 has a min. head thickness " I" dimension and the 321 has a min head thickness "H" dimension and not be less than min cc spec for 14 and 18mm heads.
Pages 73, 80 and 81
http://www.apba.org/sites/all/files/...89-7-17%29.pdf
"Keep Move'n" life is catching up!
No man's life, liberty or property are safe while the legislature is in session.Comment
-
I totally agree with Tunnelman801.... The cool tool is the answer... that's the simplistic way to do it... no machining involved... except for drilling two holes to mount it... and no measurements. Easy Peasy.sigpic
Dean F. Hobart
Comment
-
Actually, I don't agree that the Cool Tool is the answer, regardless however I agree that the Cool Tool is a good step forward.
Rather, I think that the best solution is for the SORC to approve a new underwater pickup in the gearbox (skeg) casting for the water pickup, and then whatever plumbing is necessary to get this water flow into the powerhead, similar to what PRO racers use.
Lets be realistic: The use of Yamato castoff engines from Japan;'s pari-mutuel racing has resulted in a perversion of pure Stock APBA racing rules for almost 40 years now since the late 1970s when the World (Jap) motors began to be imported for ''Stock Racing'' use.
Little by little, the SORC has passed rules and accommodation to favor these foreign-based engines, to the extent that these engines now dominate the Stock Outboard category. One big push has been the low price point of these ''reconditioned'' imported engines, far below the $5000 or so of a newly manufactured engine in USA dollars.
So my point in plain words is, if you don't want to buy a new ''high-dollar'' Sidewinder, then why won't you drill (or have drilled) a hole low down in your gear case to pick up cooling water for your powerhead? Because of rules??
Look! APBA is a member-driven org. If you don't like what SORC is doing, you can change it. If you're cooking your engine for lack of cooling, you can change it.Last edited by dwhitford; 10-19-2017, 07:25 PM. -
The only problem with a new casting is you are now defeating one of the reasons for the pick up tube...cost. How much is this new custom cast gear box with integrated pickup going to cost?
As for Yamatos "perverting" stock outboard, aren't they the answer to American manufacturers ceasing production of many of the popular racing engines?
Other than the Sidewinder, what American made engines are available for stock outboard?
-
-
-
Dwitford,
Yamatos are extremely popular because they are inexpensive and run forever.
I'm not sure which rules you are refering to that favor foreign motors, but all motors (foreign and domestic) are machined within certain tolerances...that's why we have critical dimensions to inspect.Comment
-
The use of propeller-driven spray to provide cooling water for an outboard engine dates to 1930s technology, well before today's surfacing propellers running at or above transom depths of racing boats. Back then, most of the propeller was underwater, and a steady stream of water went directly back toward a backward-facing pickup point for later distribution to cool the cylinders.
So at today's propeller depths at racing, you can't reliably expect that the propeller can provide steady-enough a stream of water thru above-water holes to cool the engine. It just cannot happen.
Instead you need readouts from real tests with the best candidate props you have to see what might be the shortest time around the oval.Last edited by dwhitford; 10-19-2017, 08:02 PM.Comment
-
I'm not implying that we don't need to improve cooling, however, we did test 321 in CSH today with multiple props and didn't get hot.Comment
Comment