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Author Topic: Solo to Sidecar by STD  (Read 67822 times)
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wobblywalrus
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« Reply #195 on: December 09, 2013, 08:36:32 PM »

Credit goes to "Speed and How to Obtain It"  The book cost 2/6 in 1936.  The author is not mentioned by name. 


* Brooklands Can 2.jpg (263.88 KB, 993x768 - viewed 183 times.)

* Brooklands Can 3.jpg (201.29 KB, 1009x768 - viewed 173 times.)
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Nortonist 592
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« Reply #196 on: December 10, 2013, 01:58:32 AM »

If I could find my copy (under my desk and I'm lazy right now) I could tell you.  But I believe the author is Phillip Irving.
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Get off the stove Grandad.  You're too old to be riding the range.
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« Reply #197 on: December 10, 2013, 07:07:54 AM »

Speed and How To Obtain first published 1925 by the staff of Motor Cycle. The Phil Irving book was was Tuning Foe Speed and first published in 1948, a much more modern tome.
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« Reply #198 on: December 10, 2013, 12:21:57 PM »

Thanks Tofu. 
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Get off the stove Grandad.  You're too old to be riding the range.
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« Reply #199 on: December 10, 2013, 05:15:28 PM »

A lot of interesting information in those pages, I need some time to try and digest them. I did do some homework on the engine number and discovered my ebay replacement engine is actually a 1982 XL 500 (NOT an XR). But Thumpertalk tells me the XR and XL used the same cam so my earlier pipe calculations should be the same.
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STD; Speed Team Doo
'82 Honda 500 APS-AF
'70 Triumph 250 MPS-PG
'71 Triumph 250 APS-PF
'70 Triumph 250 M-PG
wobblywalrus
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« Reply #200 on: December 10, 2013, 10:13:39 PM »

The slanted parallelogram Brooklands shape was explained to me once.  It is shaped that way so the pressure waves in the can get scrambled and they do not affect the header harmonics.  Also, the mixed up waves require less secondary baffling to reduce noise.
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« Reply #201 on: December 14, 2013, 12:43:12 PM »

Thanks Bo, that info is good stuff. I wrote a long letter to Santa and lied through my teeth about how good I was, helping old ladies across the track and giving used oil to the poor. It worked because I am getting an FT Ascot exhaust pipe in my stocking. From what I have read it offers a better tune than the XR high pipes. But since it does run under the engine I will need to revisit some design choices like ground clearance and sidecar mounts. At least I now have options.
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STD; Speed Team Doo
'82 Honda 500 APS-AF
'70 Triumph 250 MPS-PG
'71 Triumph 250 APS-PF
'70 Triumph 250 M-PG
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« Reply #202 on: December 18, 2013, 09:40:38 PM »

Pulled the current XR 500 pipe off and put it in the line-up for comparison with the contenders. As usual nothing is simple. The XR 600 pipe inlets are located too wide and exiting Rt, it runs into the lowered gas tank. The FT 500 inlets are too large in diameter to fit the head ports. Sooo, the closest thing I might get to the prescribed primary pipe length for tuning is to find a talented welder who can put the XR 600 inlets on the FT 500 pipes.


* Exhaust Pipes.jpg (175.79 KB, 500x383 - viewed 176 times.)
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STD; Speed Team Doo
'82 Honda 500 APS-AF
'70 Triumph 250 MPS-PG
'71 Triumph 250 APS-PF
'70 Triumph 250 M-PG
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« Reply #203 on: December 18, 2013, 10:15:00 PM »

Can you use an Ascot head?  That might give you better breathing and help as much as the pipes.
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tauruck
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« Reply #204 on: December 18, 2013, 10:53:21 PM »

On the Sportsters I build the pipe steps up to a larger OD about 2" from the flange.

Doing the same on the Honda might work?.
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« Reply #205 on: December 18, 2013, 10:57:43 PM »

Bo, An Ascot head would solve the exhaust issue and might breath better, but I have no clue how it would fit on a XL jug and if incidentals like timing chain and cam et all would match up. What do you think?

Tauruck, I can't visualize what you are describing. Details?
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STD; Speed Team Doo
'82 Honda 500 APS-AF
'70 Triumph 250 MPS-PG
'71 Triumph 250 APS-PF
'70 Triumph 250 M-PG
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« Reply #206 on: December 18, 2013, 11:17:13 PM »

I found the only photo where the step up is clear enough.

Not one of mine but I think you'll get the idea.


* Pipe..jpg (228.4 KB, 800x600 - viewed 202 times.)
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Koncretekid
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« Reply #207 on: January 08, 2014, 10:20:50 AM »

Brian,
I received and read your book "My Paradise Lost" over the holidays and thoroughly enjoyed it.  It brought back many memories of my own youth, growing up in a small eastern college town.  While you were getting chased by the "zonie" police, we were getting chased by the campus cops (they couldn't catch us) or the town police (they could!), and then there were the mini-bikes and go-carts racing around the back field as well as the endless exploration of the creeks and ponds I grew up around.  Then the trials and tribulations of high school and college days.  I admire your talent for writing.  Thanks for the memories.
Tom
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We get too soon oldt, and too late schmart!
Life's uncertain - eat dessert first!
Seldom Seen Slim
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Nancy -- 201.913 mph record on a production ZX15!


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« Reply #208 on: January 09, 2014, 09:07:23 AM »

Brian, I'm enjoying the book (Nancy bought it for one of my Christmas presents), and it's fun to see your photos - growing up.  So far I'm up to the footpeg into the calf part of the story.  I read only a few pages/day -- trying to prolong the fun.  Thanks.
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Jon E. Wennerberg
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Bruin
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« Reply #209 on: January 09, 2014, 11:23:35 AM »

Thanks guys, It means a lot to me to hear from readers. What I am finding out is that no matter how removed and exotic one's upbringing might be, there is something universal about life's journey. I had an 80 yo widow tell me she could relate to the awkward teen romance chapter.

The artic vortex has pushed me out of the garage so there is not much build news to post. Tucker's Triumph is in the final stages of race assembly. My co-pilot is working on the sidecar design but we won't see real progress until he retires in February.
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STD; Speed Team Doo
'82 Honda 500 APS-AF
'70 Triumph 250 MPS-PG
'71 Triumph 250 APS-PF
'70 Triumph 250 M-PG
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