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  1. Replies
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    Sticky: Dick, First off, very nice job on a difficult...

    Dick, First off, very nice job on a difficult project.

    The most telling photos to me are the ones showing the rod caps and bolts. I ran those in through Photoshop for a better view. I couldn't...
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    I'm sure it's the same guy, but I'm not sure how...

    I'm sure it's the same guy, but I'm not sure how active he was in racing in '66. I spoke with him a few times when we were setting up the dyno. Very nice guy who was always willing to help.

    Frank
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    QW Dyno and Pipe Stuff

    Some time back (about 100 Internet years ago), I posted some info on the comparison of various <a...
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    Blame Henri Coandă

    The Coanda effect (see your friendly Wiki place) is one reason for offsetting the combustion chamber. This is especially true for cylinders with finger ports--or "puff ports" as we called them....
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    Gene, I can't recall if there was a difference...

    Gene, I can't recall if there was a difference between FA and FB standpipe height. I know the (brass) dump tube height (in throat of carb) is somewhat critical. In both the FA/FB, the top of the dump...
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    Gene, I seem to recall the following about the...

    Gene,
    I seem to recall the following about the mods to the Model N:

    The throat was reamed -- FB was larger dia than the FA, but I don't recall diameters.
    The high-speed dump tube height was...
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    Bill, I wasn't at QW during the change to the...

    Bill,
    I wasn't at QW during the change to the newer elbows. When I did my thesis exhaust work in '71, they were the std system. I'm guessing that the intent was to maintain centerline distance from...
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    If I recall, there was a problem with some of the...

    If I recall, there was a problem with some of the short radius elbows breaking in competition. Also, the Gen 3 flares were the best overall for the race course. The subject of this thread is "How...
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    I don't see any problem with 130+ with the right...

    I don't see any problem with 130+ with the right setup. If I were going for the last 4 or 5 mph, I'd run the old style elbows, move the water injection point about 1" from the flange, and run Gen II...
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    Ralph, I think that might be a bad link--or...

    Ralph,
    I think that might be a bad link--or maybe typo.
    Is this the one? https://sites.google.com/site/starsofpowerboating/
    Nice site.

    Frank V.
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    When I first looked at the photo, I thought the...

    When I first looked at the photo, I thought the year might be 1966, thinking that was the 1st year for the Gen 2 megaphones on the Flatheads. But it could have been '65. The only location that rings...
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    The Quincy flatheads (loopers) had both reed...

    The Quincy flatheads (loopers) had both reed valves and piston ports--or "3rd" ports" as we called them. The 3rd port addition increased hp over the entire band from about 6500 to 9200 RPM when...
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    Gene, I had full intentions of calling you...

    Gene,

    I had full intentions of calling you yesterday evening during your birthday bash, and now I forget what it was that made me forget. Anyway, happy birthday to a fellow QW vet who I'm proud...
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    Gene, Please pass my condolences on to Jim and...

    Gene,

    Please pass my condolences on to Jim and family. I remember Al mainly from his stop-by visits to QW. He was a true gentleman.

    Frank
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    Gene, Hopefully, the remodeling doesn't result...

    Gene,
    Hopefully, the remodeling doesn't result in a fern bar decor with the daily special being catfish-shaped tofu.
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    Points + Coil

    This is a QW ignition setup, cam and all. One of the biggest improvements in the flatheads was when we dumped the battery/points systems and went with the Merc CD/distributor setups. The...
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    Carp plates forever!

    Gene & Art,

    Sad news about the River House. I shot some of best (and worst) pool there. The food was always great, but then nothing beats tradition. It's kind of like the Maidrite on 12th...
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    John, it looks pretty basic. I noticed that...

    John, it looks pretty basic.
    I noticed that the program uses the exhaust port diameter "at the point where it exit (sic) the casting...". This seems a little dicey to me, since one of the most...
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    Gene, I have no doubt that you could crank that...

    Gene, I have no doubt that you could crank that 8-cyl Konig even today. Only difference between now and the 70's is that now you would probably need a rope.

    The big 90-incher had electric start. ...
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    Wayne -I seem to recall that the pipes you...

    Wayne -I seem to recall that the pipes you describe are the ones that were on the opposed A that gave us the spanking in Michigan.

    Frank
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    Engine #9

    I recall in one of the early races of the flathead engines, we went to a race in (I think) Constantine, MI. I believe this would have been about '64 or '65. We were especially interested in how the...
  22. Water injection is really about moving the (near)...

    Water injection is really about moving the (near) peak hp around--something like a transmission. With the flatheads, this makes for a very fat hp curve, possibly moving near peak HP down the scale...
  23. Water Injection?

    J-Dub,
    That's a nice looking setup.
    I noticed there are no water injection bosses on the elbows. Do you have plans to add this? It adds a very significant boost to low/mid-range hp, possibly...
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    John was a fierce competitor whose driving skills...

    John was a fierce competitor whose driving skills were matched only by his non-stop sense of humor and boundless enthusiasm. It was a pleasure to know him and to spend many hours in the pits with...
  25. I don't think our dyno would handle the torque of...

    I don't think our dyno would handle the torque of a 44 flathead. If this first-off 44 flathead was before '66, it was probably seated-in on the test tank, since we didn't have a dyno until '66 ( ?...
  26. For some reason, I can't recall Gerry's 4-cyl...

    For some reason, I can't recall Gerry's 4-cyl setups, but I do recall that both Bob and Gerry's setups for 'A' and 'B' were always tucked under much more than anything we (QW) or most guys ran. With...
  27. Bill, I didn't see even a trace of adversity in...

    Bill,
    I didn't see even a trace of adversity in your post. In fact, it was great to hear a report and an opinion from someone who was there. This section of forum real estate is all about history,...
  28. Gene, I think for every minute I spent doing...

    Gene, I think for every minute I spent doing on-water testing, Jim Schoch did a month. Jim had an incredible feel for engine, boat, and/or prop changes. He was like a walking dynamometer with a...
  29. Jerry Waldman's FD Run

    I recall Jerry saying that he found the biggest D prop he had and ran an "almost competition" setup when he set the record. As I recall, he had one of the very early sets of Gen III megaphones and...
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    Round intake ports?

    Paul,
    Did this block escape without having the intake ports squared or was this hand filing operation discontinued?

    Frank V.
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    Jeff, those "ports" above the wrist pin were...

    Jeff, those "ports" above the wrist pin were actually cast-in and were more like big dimples; they were for relief. The finger ports--sometimes called "puff ports" or "boost ports" were cut in the...
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    Crankshaft Pads

    John, The crankshaft padding goes back to the deflector days and carried through to the flatheads. The intent was most likely to decrease crankcase volume. I believe it was done on both 20H and...
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    Finger or "puff" port

    If you look at the geometry of the intake ports, you will notice that they are aimed toward the "back" of the cylinder. The mixture flow tends to form a "dam" at the point where the two directed...
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    For a 50 cu in engine, the total swept volume is...

    For a 50 cu in engine, the total swept volume is 50 cu in / revolution. Each cyl volume = (total displacement) / ( cylinder count ).


    Total = (50 cu in * 6000 RPM) / 1728 = 173.61 CFM.
    Per...
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    Frank, The engine, as shown in your photo, has...

    Frank,

    The engine, as shown in your photo, has gen 2 pipes. Most likely, it was originally shipped with gen 1 pipes.

    I'm not sure what the other carb tube is for. It's too high for a...
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    Perhaps UIM imposed a dimensional spec stating...

    Perhaps UIM imposed a dimensional spec stating that no part of the motor or its attachments can extend beyond some datum; for example, the top/center of the transom.
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    Considering UIM's tight noise rules, that would...

    Considering UIM's tight noise rules, that would be a good reason for pointing the exit tubes downward. I think they (UIM) at one time required something like no more than 85db (or 90, maybe) on a...
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    About the spitters on the Konigs, if water...

    About the spitters on the Konigs, if water injection was being used, the aerosol of water, oil, fuel would be sprayed over anyone behind the boat. Pointing the spitters down would at least partially...
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    Yes. I'd try that before laying out cubic $ for...

    Yes. I'd try that before laying out cubic $ for machining.



    The radius side is always the side toward the exhaust port. So, that would be the BOTTOM of #1 and #3, and the TOP of #2 and #4. It...
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    Frank, You could try taking a very coarse file...

    Frank,

    You could try taking a very coarse file and light running over the surface to remove the bumps. Next, you could put some coarse grit (220?) wet/dry sandpaper on a very flat plate and use a...
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    You could probably remove as much as .005 or so...

    You could probably remove as much as .005 or so on the underside of the heads with minimal effect on compression. I would do this on both heads. The milling might leave a small edge on the exhaust...
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    This is sad news. I had the pleasure of...

    This is sad news.

    I had the pleasure of working side-by-side with Jack. He did top-quality work whether he was repairing a pleasure boat, building a race engine, or tuning a chain saw. He was...
  43. Smitty - I divided your questions into the above...

    Smitty - I divided your questions into the above numbered catagories. Some editing was applied to simplify the list. If you think this captures everything, then we can start from there. I'm going...
  44. Loop Engine Exhaust Systems - An Analysis

    There have been several questions regarding the exhaust configuration implemented on the Quincy Welding (QW) Flathead (Loop) Engines. The siamese exhaust system, in which two exhaust ports per...
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    Jeff, I mod'd my post at...

    Jeff,
    I mod'd my post at http://www.boatracingfacts.com/forums/showthread.php?t=195 to include all of the pipe drawings since we can now do multiple inline attachments. I eliminated the external...
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    FA and FB Horsepower

    Sam - I can't recall the exact numbers, but I believe that in '72/'73 the FA was pulling around 55hp and the FB about 66hp. This was about the last stage of the engines based on the merc crank/rods....
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    Charles - Divider Length

    Charles,

    The divider in the exhaust elbow was about 1 in. long or so, as I recall. It's primary purpose in life was to provide a better transition to the pipe diameter than would be possible by...
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    Ron's - Harry's FA/FB Looper

    Ron,

    First off, thanks to you and Ted for building a nice forum here.

    Were the FA/FB engines from about the same time frame? I think the FA's of late '66/early '67 were pulling almost as much...
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    A Brief History of QW Loop Engine Pipes

    The hp plots below show the 3 main generations of pipes developed at QW from 1964-1972 for the loop engines, as well as one experimental expansion chamber. The hp curve for each system is based on...
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    Charles, Actually, it's a good question. ...

    Charles,

    Actually, it's a good question.

    The main purpose of the divider was to shield the adjacent piston from the direct exhaust blast. If you look at the pix of the D block that...
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