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Author Topic: 1948 HRD Vincent -Ashtray to Driveway  (Read 18834 times)

Offline fury413rb

  • Posts: 302
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #20 on: Sep 19, 2014, 09:55:35 »
so cool - in to watch
Taylor
'79 KZ650C3 - In town beater
'75 RD125 - Little Smoker
'77 KL250 - All stock survivor
'11 Speed Triple 1050 - Commuter

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #21 on: Sep 20, 2014, 00:09:06 »
  Here is the cylinders fitted and the front head installed. Almost completely

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #22 on: Sep 20, 2014, 00:12:45 »
 A profile picture of two of the available cams for HRD Vincent engines. The one on the left (Mk 2) is a lightning cam. As in what was used in the Black Lightning. The one on the right is a Mk5 which is used with curved cam followers v's flat with the Mk2. I'll dig some out and take pictures of the differences.

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #23 on: Sep 20, 2014, 00:17:50 »
   This is the standard crank assembly with new pistons that I removed from the 3rd "C "series 1952 engine. Its gives a great view of the differences in time. One is 1952 and the previous photo's show a 2013 Crank and Pistons.

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #24 on: Sep 20, 2014, 00:21:17 »
   This shows the flat cam followers v's the curved followers in previous pictures.

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #25 on: Sep 20, 2014, 00:28:06 »
   Next up I have become quite creative with yellow outline boxes. In this photo is the valve decompression  linkage system. It took a lot of hours to get this to work. With the Mk5 cams its leaves very little room for the actuator arms to work . After careful grinding if the arms it's possible to get them to work. Hours = about 5 hours. Frustrating but worth it.
Oh by the way both heads and barrels are on now.
 
« Last Edit: Sep 20, 2014, 00:31:17 by brt651 »

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #26 on: Sep 20, 2014, 00:37:10 »
   The primary drive system from the ''C'' series engine . High lighted is the compensator section. It has smaller springs inside of the larger springs shown. I'll be installing this set up on engine 2. I have new springs ,chain and spring plate.
For engine one I'm using a Bob Newby belt drive. Yes I'm going to install a plate and seal to the primary side of the crankcase housing with a seal in it. I'll show that when I do it.

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #27 on: Sep 20, 2014, 00:41:40 »
   A comparison of a STD 500cc cylinder head to the new 600cc TP head. Note twin plug holes.
Also the valves have two guides. a lower and an upper. The valve rocker engages the valve at mid point. The valve spring sitting on the upper guide.

Offline brt651

  • Posts: 103
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #28 on: Sep 20, 2014, 00:54:47 »
   This is the start of timing the cam chest. The followers have to have clearance first ,for the higher lift cams. Then all the followers need to be shimmed.
   The half time pinion on the crankshaft has 5 slots for timing. Each slot 1.5 deg different. this gear also comes in 10 different sizes. in 2 thou increments from -10 thou to + 10 thou. Why, I'm glad you asked. The idler is on a movable mount. At completion of assembly you need to have zero clearance on all the gears when cold. So start the cam gears on to the cams by 1/8th of an inch and ensure they are square. Fit both cams. Noting the cam gears aren't keyed. The idler gear has 15 deg between each tooth. install idler gear on mount and push it up into mesh. Ensuring the gears rotate freely but with out free play. Now that sounds easy right. Not so. As you tighten the 3 nuts on the idler pedestal it moves. Fast forward 2 hours. Now pick the correct half time pinion to match the the idler to have no clearance , yet free to turn. Another 2 hours on.
  I won't bore you with the rest unless you need to know. But using the crank 1.5 deg slots and the 15 degrees from the cam idler lets you get the rear cam close. Then pressing on and of the cam wheel and using a dial gauge and degree wheel you set up the rear cylinder. Then add 50 degrees and another 360 degrees and you do the front cylinder. This time you cant use the crank pinions 1.5 degree slots for adjustment as you will alter the rear cylinder. Any way 40 hours later it should look like this.


Offline jeff4uk

  • Posts: 364
    • 71 triumph T100c
Re: 1948 HRD Vincent -Ashtray to Driveway
« Reply #29 on: Sep 24, 2014, 04:57:50 »
Great build ,love the HRDs keep it coming