Folks,
I noticed on legend cars SS line with oil feed.
Engine does not spin higher than stock if I am not mistaken?
What is the exact purpose and benefit of adding oil feed lines to the cams in this particular situation?
https://fjowners.com/gallery/12/6885-080425221605-126671393.jpeg
Thanks
That depends on which engine builder you talk to...
I have my reasons for using the external head oiler on the racecar engines.
Others have theirs, unfortunately you wont get a straight answer from anyone.
The best part of it all, you cannot do this in the bike as the frame is in the way, so it is a moot point...
Randy - RPM
While your on the subject of legends car motors,I was wondering about one of the cams in the former legends car XJR engine I put in my FJ. When I was adjusting the valves I noticed the left end of one of the cams was welded instead of having a metal plug.
I was thinking it could have been to mount the cam to regrind the lobes.
The engine runs really good and other than the welded end it looks like the other stock cam.
I understood that due to uneven air cooling, transverse mounted FJ race motors would tend to break their cam shafts, so they would pin the cam shafts for reinforcement.
Perhaps that's what you have?
That cylinder head has also been align honed - based on the aluminum half moons used. This can be used to clean up scored cam journals or when replacement cam caps are used. Both cases are probably more prevalent in legends use then typical motorcycle use.
[/quote]
Quote from: Pat Conlon on April 12, 2025, 12:03:11 PMI understood that due to uneven air cooling, transverse mounted FJ race motors would tend to break their cam shafts, so they would pin the cam shafts for reinforcement.
Perhaps that's what you have?
By "pin the cam" do you mean something is inserted into the hollow shaft ?
Quote from: fj1289 on April 12, 2025, 02:27:41 PMThat cylinder head has also been align honed - based on the aluminum half moons used. This can be used to clean up scored cam journals or when replacement cam caps are used. Both cases are probably more prevalent in legends use then typical motorcycle use.
Do you mean the half circular shape where the bearing cap meets the cam journal? The caps are one piece. The ring is just part of the casting machined flat. The caps on one of my 1100 motors looks the same.
Here are pictures of the cam shaft caps from one of my FJ1100's.
Quote from: Pat Conlon on April 12, 2025, 12:03:11 PMI understood that due to uneven air cooling, transverse mounted FJ race motors would tend to break their cam shafts, so they would pin the cam shafts for reinforcement.
Perhaps that's what you have?
By "pin the cam" do you mean something is inserted into the hollow shaft ?
Yes
This is the half moon piece I'm talking about. From the factory they were bored from just one side - the side the valve cover gasket has rubber half moons built in. When a machine shop align hones it they have to go all the way across the head. So the additional aluminum half plugs get fashioned to seal those additional cut outs.
Yes, to what both Pat and Chris said. That motor has had the cam caps and heads lined bored to true them and the intake cams had a tendency to snap by the 3 bolt cam cap, in the race car. While they still can break with the cam being pinned as it is. It usually would not grenade a motor as the cam would still turn. With a stock cam and a broken camshaft the side that broke off without the cam gear would no longer spin resulting in one of the two cylinders hanging valves open and blowing a hole in the side of the crankcase after the pistons and valves were forced to kiss.