Long Intake Manifolds - Rough

[koko64]

I think Koko64 has done this. Wondering if others have, and if so, are there places that do the necessary polishing that I could send 'em to?

G'day AM

Cleaning up the rough casting lumps and ridges in the manifolds is good, as is removing other protusions like too long vacuum screws, but it is important to be mindful of the advice of Chris, GM and DP. A machined type finish and not a polished, mirror finish, and matching the ports is important. I couldn't stand the sloppy factory job on the manifolds, and the long screws protuding into the manifolds, bloody heresy!

I did my own under supervision of a performance tuner. It's optimising things in a 'blue printing' kind of way and is just another small contribution to the overall effect of all your engine mods. I had a very good porting job that those manifolds ran into. The stock ports are the biggest impediment as they are of a similar quality to the manifolds. That and the standard compression, stock valve area, oh yeah and the stock carbs...I better stop.

I know a guy who literally polished the ports and combustion chambers of his race bike. It wouldn't run properly untill he got emery paper and roughed it all up!

[krista]

I'll certainly give that an eyeballing in the daylight. One of these days I'm going to send them there heads off for testarossa work. But I think I'd rather go with testa - nero - get some cool fancified black painted heads.

Cheaper to get a 1000 engine; it starts off with great intake ports. Same power as a full build for 1/2 the price. And then you've got all the tricks remaining to do to the 1000 ...

[junior varsity]

Biggest difference I noticed is the intake manifolds don't get as hot as a non-ceramic version.

I was thinking this would be a benefit I'd see as well - the ceramic coated manifolds wouldn't allow as much ambient engine heat to affect the mixture as it went into the motor - thus being "relatively" denser and cooler than an uncoated manifolds mixture - although the effects would be relatively small and gradually increase as the engine's radiant heat increased.

Cheaper to get a 1000 engine; it starts off with great intake ports. Same power as a full build for 1/2 the price. And then you've got all the tricks remaining to do to the 1000 ...

I do planning on grabbing an 1000 or 1100 motor, but I'm not letting go of this beast. Kind of a tune it as well as I can before moving on to the next plan. Not really trying to be stubborn, mind you, but this is just a part of the hobby aspect for me with this bike (call it a "look what i can do" bike, and by "what i can do", i really mean "what i thought was a good idea to pay someone to do for me who is skilled in the art")

[battlecry]

Ato, what is the "1mm threshold"?

[junior varsity]

I'll snap some pics this afternoon when I get a break from the books - see if I understand it correctly

[battlecry]

Thanks!

[junior varsity]

Ok, there is certainly a bit of a lump, or reduction, that is abrupt about 1cm before the manifold becomes 'flange'. The inside of this 1cm (or less) ridge is a nice smooth machined finish, but where it drops off for the 'pipe' section of the manifold - the rough section, there's a rough transition.

Not really worth taking a picture, but I may take the time to smooth that transition down a bit.

On the calipers, the manifold's flange face opening is the same diameter as the intake on the head.

[koko64]

Cheaper to get a 1000 engine; it starts off with great intake ports. Same power as a full build for 1/2 the price. And then you've got all the tricks remaining to do to the 1000 ...

Looking at Brads dyno charts, my bike (with all that is done to it) goes about as well as a dead stock 1000DS with pipes and and tune...

Here I sit drooling at the prospect of 1000DS motors at the price you guys can buy them. Even if you could find seperate DS motors here, it would be almost cheaper to do a local MBP job on your heads, if you could find someone to do it. Maybe in a few years time the prices may come down, or not. You would want to get a DS motor and hot it up to be worth the trouble,I reckon. But if you love her you'll spoil her rotten!

There is something to be said for not over capitalizing in a street bike, when you can buy a track bike and go nuts without going to jail . We are heavily policed down here.

I can do no more to my Monster unless I want to reconfigure the heads with ST2 cams, big valves, short manifolds and raised ports. Go the whole shebang. Geez, it wheelies in second as it is!

[junior varsity]

as a large mammal, while I can wheelie, its not really very big unless you are in first. second is a smaller wheelie. third is no wheel at all. the end of summer holds FCR carbs in store for me. I just have to get to there.

[greenmonster]

What threshold are you describing?

Ok, there is certainly a bit of a lump, or reduction, that is abrupt about 1cm before the manifold becomes 'flange'. The inside of this 1cm (or less) ridge is a nice smooth machined finish, but where it drops off for the 'pipe' section of the manifold - the rough section, there's a rough transition.

That`s what I mean, sometimes my English limits me when it comes to specific technical
terms.

[junior varsity]

No big deal, I certainly figured it out!