Yes unless two to one and run it ovalcrazypj said:I think you would need pipes coming either side of cylinders to make a nice looking underseat exhaust, both coming in from left just doesn't sound right?
crazypj said:The intake is sized for a 400 motor stock so you have to be very careful doing any mods. I tend to smooth it out slightly and unrestrict valve guide boss. The exhaust side is the restricted area, you can pretty much carve on it without hurting any flow (although it is possible to go too far it takes a lot of cutting). With a 378cc conversion everything works much better. The AG Bell books give a lot of information that works but David Vizard keeps up with later developments (I guess he 'invented' some of the stuff various racing engines use?)
onefromexile said:Yeah I was unable to find anything specific in his books for a 360 motor but
Was able to learn a lot and understand the theories and principles behind it
So I went with your advice and his theories and ended up with great looking head lots of work like 45+ hours into it stayed away from intake side just cleaned up some of the poop from casting and was able to use a pretty expensive piece of inspection equipment to port he match as.close I could
It's within a thou
Roundness and diameter
The exhaust worked
Gs850 Pistons had to have em
I'm hoping for solid results improvements
I just had new bronze guides driven
And last is new valves
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I spent way to much time on it but he is my first full build on a motorcyclecrazypj said:45 hrs sounds a bit much but as you had some specialised equipment to match left and right I guess it's not too bad.
Long time ago (around 1980) I spent over 25 hrs doing just one intake on a GS550 then around the same to get the other 3 intakes matched (much easier when you have a pattern to follow) Turned out a stupidly fast bike after big bore conversion, frame welding, stock carbs bored oversize and a full race exhaist and cams (around 170 mph but not with me on it ) Honda VFR 750 had just been launched, it was great fun running away and hiding from them on what looked like a POS ;D 8)
Look at what I just dragged homecrazypj said:I've given a dedicated 'top end' oil pump a lot of thought over the years but decided against it every time. Modification plus better voil seems to have cured the 'problem'. I've stripped a few motors now that look better than when they were assembled.I am doing the external oil line bypassing filter on a couple of engines though.
I plan on running no external yet but still work on developing a system
Mostly for cooling the oil
Ohh do tell allcrazypj said:That motor is very under-stressed and over engineered. It never developed anywhere close to full potential. I would bump it to 500cc with later 500 twin parts
Let me say further on the coilonefromexile said:Ohh do tell all
Turns out it's an 80' gs450 frame 80' gs450 engine too
Right now I cleaned up the wires they were melted together
Po was trying to run a single dual output coil wondering why wouldn't run and tried to silicone the bad intake boot
Definitely a lot of hacked work but I pulled it all off and went to simplifying
In needs one carb boot and fork seals few things but I can run it and use it while I build my 378
I'd like to eventually do a tracker brat
Versatile lil beast
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Back to the oilingcrazypj said:It all depends on crank configuration. A 180 crank needs two coils but 360 crank can use a dual lead coil. Even then, two coils is actually better though
That's what I was wonderingcrazypj said:I was going to do something very similar. Drill a pick up hole just below where the baffle plate rod sits so it's higher than the sump pick up. That way the electric pump will never be able to drain sump (although oil in head will get to mains and big ends with back-flow/drain
That brings you back to the original system thoughcrazypj said:Yep, the problem 30+ yrs ago, there were not the choices available for miniature oil pumps or high efficiency electric motors. I looked at the filtration system as well, you cannot get better than centrifugal, any filter medium will always allow some particulate through.
A centrifuge forces any heavy particles to outside of filter bowl (OK, osmosis is a different matter but we are not trying to remove various elements from oil, just 'bits')
I have an oil filter article saved somewhere (found it a couple of days ago then 'lost' it again : )