11 replies to this topic

[MN]

1965 RA272 1.5-liter V12

enlarge: http://hondaf1.vtec....tory/ra273e.jpg
Note: The original site where I found this photo says "1966 RA273E" but RA273 was 3-liter V12 and it wasn't transversely mounted. Must be a mistake.




1988 RA168E 1.5-liter V6 Turbo

enlarge: http://hondaf1.vtec....tory/ra168e.jpg

[marion5drsn]

Very Interesting, notice the counterweights on the 12 cyl. crankshaft.Ordinary garden variety engines don't need these. M.L. Anderson

[Arneal]

Again looking at the V12, at the bottom center of the picture there appears to be 8 camshafts that presumably join in pairs to create 4 longer camshafts with a gear in the center.

Whats up with that? Is that a common configuration? Why do it that way rather than with 4 longer camshafts driven from the end of the banks as one typically sees in a commercial v6 or v8?

[Jhope]

Originally posted by Arneal
Again looking at the V12, at the bottom center of the picture there appears to be 8 camshafts that presumably join in pairs to create 4 longer camshafts with a gear in the center.

Whats up with that? Is that a common configuration? Why do it that way rather than with 4 longer camshafts driven from the end of the banks as one typically sees in a commercial v6 or v8?

From the looks of it, it look slike two V-6 matted together. At the center of the motor, the CAM Gear would be placed, with the CAM Shafts attached to both ends. I don't know the advantage of this. Does it increase torque and or horsepower since the cams are shorted and weigh less? I hope I'm on to something.

[MN]

V12 is transversely mounted engine.
Note transmission sticking out in the middle of the engine.

[Jhope]

the gear box was mounted to the left of the engine it seems. There has never been a motor mounted tranversly in modern era F1.

[MN]

Originally posted by Jhope ..... There has never been a motor mounted tranversly in modern era F1.

We are talking about 1965, 36 years ago, the very first Honda F1 engine.
Look at the picture again, the drive shafts will be attached at far end of the transmission box, both sides right and left, then drive shafts will run parallel to the engine and go to the rear wheels.


This is the car which had transversly mounted 1.5-liter V12 enging I posted.
Note the gear box at end of the car.

[Jhope]

For some reason I thought it was the 3.5 litre engine used in 1991 and 1992.

[blkirk]

Originally posted by Jhope


From the looks of it, it look slike two V-6 matted together. At the center of the motor, the CAM Gear would be placed, with the CAM Shafts attached to both ends. I don't know the advantage of this. Does it increase torque and or horsepower since the cams are shorted and weigh less? I hope I'm on to something.

Cam shafts act just like torsion bar springs. If you drive the shaft from one end, the other end will lag behind slightly causing the valves to run a little bit behind schedule. By driving the camshaft from the middle, you cut the size of the problem in half.

[Jhope]

Originally posted by blkirk


Cam shafts act just like torsion bar springs. If you drive the shaft from one end, the other end will lag behind slightly causing the valves to run a little bit behind schedule. By driving the camshaft from the middle, you cut the size of the problem in half.

So me being the total mechanical deadbeat/cluless person on this BB, it seems like I kinda understood this concept. Not fully, but a small bit of it.

[MN]

Forgot to tell you, you could hear both engines.
Click on RA272 and Lotus-honda.
http://www.honda.co....utomobiles.html

[Jhope]

http://f1images.topc...es/64168-9a.jpg

http://f1images.topc...es/64149-20.jpg