Laverda Corse Exhaust Sport System

KERMIT1200

KERMIT1200

Hero member
Location
Worcester,UK
Hi Bob and all,
 Saw the piccys on another thread,certainly looks smart - but!

First of all what follows has more relevance for  race engines than road .

The exhurst (espically the down pipes) should be tuned to the motor.Basically depending on when the exhurst valve opens before BDC will determine the length of the downpipe,in respect to where you wish max bhp to occur in the rev range.Basically the shorter the downpipe the higher up the rev range max bhp will occur.One must ask the question is this system designed around a 4C or 7C cam?
Also the collector box appears to be a bad design.The downpipes should fit into a tapered collector box,not in to each other.The design creates problems in so much as the pressure waves going down the will interfere with the negative wave travelling back up the pipe.A seperate tapered collector box would allow people to fine tune the exhurst system to their particular set up.
My personal opinion would be to build a exhurst system where No 1 & 3 cylinders were coupled together,and No2 had its own single system.

Just my opinion but hopefully food for thought :)
Andy

 
Designed for 4c on 108 deg centre,max hp rpm 8.5k,in other words a race setup.shame the secondary had to be "half length" for fit
 

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Hi John,
Was that the exhaust you developed for Ken's machine? If it was I remember seeing it in the flesh and thinking it was a very nicely fabricated piece of kit.

Hi Andy,
I've not had any direct riding experience with the Laverda Corse exhaust system for the triple but I do know the firm producing it are a leading specialist in the field. Piero has been assisting with the development and testing and he reports very positive things about the system following dyno tests.

Exhaust design has changed a lot over the years and what was considered best practice a few years ago is not necessarily congruent with modern thinking. I know that Piero has experimented with a lot of different types of exhaust for the triple and, as a highly qualified engineer, won't have signed anything off unless there was a tangible and quantifiable benefit.
 
Hi Bob,
yes for Kendricks thing that never was,shame really but he had dug a bottomless pit!(really big). never liked the silencer arrangement tho'.The taper in the headers is definitely the way to go,they allow a larger than usual header dia.,good for top end,without killing the mid too much....saw them first on world supers' about 10 years ago
john
 
Hi John,
I was very interested in the work you did on that exhaust and I know Kendrick spoke very highly of all the effort that had gone into it. I think the system is now owned by forum moderator Brad [Bradco to his chums] who acquired Ken's motor for his spaceframe project. Hopefully it will see the light of day at some stage soon , it looked to be a very trick motor you put together for him.
Bob
 
Crusher/Bob,

I believe that this is the exhaust you are talking about. I acquired it from Ken with some other parts.

Scrumpy
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Thanks Scrumpy .... I think I'll pass on that tail section!!  :D

BTW, does anyone mind if I correct the spelling in the subject line?
 
Could I have the engine to accompany the exhurst please?

It, the change, appears not to have rippled through!

Scrumpy
 
Nah, couldn't be arsed to go through every post and change the subject line.  At least the board listing is correct now! 

And you've absolutely no chance getting hold of that engine.  Just re-read the spec to remind myself how much work was done by Messrs Todd & McGrath!  A real incentive to knuckle down and get on with it!!  :D
 
That be Scrumpys hand I think, note the highly deleloped ring pull finger, 'ave the top off a tinny of strongbow without even flinching, seen him do it with my own eyes.

        Keith
 
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