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La Grande Pheaton with V-shaped windshield
- RandyEma
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- landmark
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RandyEma wrote: To my knowledge there was five different cam timings over a period of time the last coming to Lycoming in 1933. The owners manual is incorrect timing Randy
Hello Randy,
once again, thank you for the information.
Do you know if there were "big" differences in timing, power-output and torque between the different cams or only some (very) few degrees?
Have these different cams own marks/punches on it or is a cam only identifiable by expert knowledge (like yours) or measurement/metering?
Matt
Was man besonders gerne tut,
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Wilhelm Busch
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RandyEma wrote: Bob I probably have four different four carb manifolds here and I do not think any of them worked that well. The best for hp was a single carb SJ then a dual carb Winfield then a std J Randy
Hello Randy,
thank you for the informations about the four carbs. That is very interesting for me.
I have some thoughts about that (just a theory)
I had expected that a four carb SU configuration (maybe together with 8:1 compression Pistons) will supply a power-output of 300 hp +.
Regarding tuned "oldstyle" Harley V2 Shovelhead engines (equiped with 1.3/4` SU-Riviera or S&S Carbs), which were bored and stroked (near the Bore & Stroke relations of J engines) up to 50 cui per cylinder. These engines reach easily 80 hp and more (or 40 hp per 50 cui cylinder), but have nearly always a camshaft timing, with longer valve openings than the std J engines.
What I have learned is that the SU-Carbs (on Harleys) are a little tricky for to find the correct jets and jetneedles to adjust/find a correct gas-mixture -not to "lean" or to "fat" (through the complete "RPM-regions").
An other cause for that could be that the original (conservative, torque optimized) camshaft timing works best with factory fitted one-carb SC and std. manifold carb. The two carb SC and four (single) carb configuration would (maybe) oversized for the (relatively short) original camshaft timing.
I would expect that a four carb (or two carb Winfield SC) configuration would work more proper with (hotter) camshafts, camshaft with longer valve opening times.
But that is a theory and guessing (for my own pleasure)
Randy can you tell me if the factory always used a "one and only" timing for the two cams or have they sometimes mounted cams with other timing-parameters? (maybe for the Mormon Meteor engine)
Cheers
Matt
P.S.: Excuse my (not perfect) english, it is not my mothertongue
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Wilhelm Busch
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Some years ago at Auburn I was talking with Harry VanIderstine about the then unrestored J572 which had a two carburetor supercharger and he said it acted like it was running out of gas at about 85MPH with the expected power loss. I couldn't come up with any answer at that time but thought about it when I got home and here is my theory. The two carburetors were pushing a heavy load of fuel into an intake manifold made for a single downdraft carburetor. As the blower speed increased,wouldn't a possible overload/flooding condition occur and strangle the engine? I would think the two "rams horn"manifolds would be a much better idea for such an arrangement as was proven by the Duesenberg Special.
What is your opinion about this?
Bob Roller
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Bob Roller wrote: J270 has V windshield but I forget which one is V'd.
Bob Roller
Hello Bob,
you are right and it is the front-screen. I found a picture of J-270 on the Duesey186 site.
But the screen-style is different to the J-532 screen.
www.duesey186.com/Datasheets/Mod ... rm2292.htm
The J-270 screen is framed "on top" with two electic-wiper mounted.
J-532 screen has not frame "on top", like the Louwman museum La Grande DCP. depending on the Randy Ema and Wizzell postings, these two will be one (the same) car.
Thx
Matt
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Wilhelm Busch
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RandyEma wrote: None built by the factory but added later .And there is one Le Baron dc with a added windshield. R
Hello Randy,
is the later added supercharger an "original" factory made one or a later made "replica"?
Am I right with my suggestion that J-532 was at a time (in the past) equiped/customised with a set of (four?) single carburetors?
Matt
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Wilhelm Busch
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Matt
Was man besonders gerne tut,
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Wilhelm Busch
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does someone can tell me how many of La Grande (DC) Pheatons were built with that V-shaped split-window windshield?
www.duesey186.com/Datasheets/Mod ... rm2559.htm
I know that one car is displayed @ the louwman museum in the netherlands. It is labeled as a 1935 supercharged Model (S)J.
I don't know the engine or chassis number. Is that (maybe?) car J-532/2559 from the link above?
www.louwmanmuseum.nl/asp/appmain ... ollsq=5362
It looks like that J-532 (as it appears on the first photo) is not supercharged but is/was equiped/customized with four single (sidedraft?) carburetor. The round metal-plates on the leftside of the hood look like the intake-airfilter covers.
Can someone tell more about model J engines which were customized/tuned with (four) single carburetor configurations. What carburetors were used?
I know about one car which has had four Solex (sidedraft) carbs mounted, but I think it is also possible that carbs like SU (Bentley) could be possible options for the J-engine.
Are there cars equiped with such a carb. configuration today, or are they all rebuilt to the "original" configurations?
Matt
Was man besonders gerne tut,
ist selten ganz besonders gut
Wilhelm Busch
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