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 Post subject: inlet manifold
PostPosted: Mon Mar 08, 2004 6:11 am 
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Joined: Fri Nov 28, 2003 4:21 pm
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Location: Durham, UK
Helloe ppl,

I have Mk-1 and Mk-2 inlet manifold and they look different.
Mk-1 has vacum take off and mk-2 don't.

What I nood to know is that, for R1 bike conversion, which manifold and which head is better.
Did anyone made manifole themselves, yet?
I'm having a bit of difficulty to say the least.
Also, what angle do you need to put carbs at for the best result.
Then again, I'm putting into Mini so it might have sapce probs... :lol: .

Cheers

Atchi


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 Post subject: .....
PostPosted: Mon Mar 08, 2004 7:07 pm 
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Location: Brisbane
Go to my profile. Look in my personal album. You will find the info you seek. :D

Both heads are the same. Manifolds differ - but you only need the flange to make a carb manifold anyway, so it does not matter.

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Don't ask me, I don't know anything. And just because I'm a senior member, it does not mean I have as many wrinkles as ellpee. 1500+ posts and still I haven't got a clue.


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 Post subject:
PostPosted: Tue Mar 09, 2004 5:13 pm 
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Location: Durham, UK
Hi Oz,
I have seen your work and it does look good.
I got your in-mani photo from Iain in Scotland.
I have noticed one thing though.
Your carb looks like back to front :?, am I right to say that?
Last week or so, I got myself a Mikuni R1 carb from ebay and I noticed that.
Also. to pipe on top, are they the one for petrol going in and 2 tube small ish ones are for return.
There are 2 vacume take off or so, am I right to guess this?
There are few bike carbs on UK ebay and they are going not cheap but good enough compared to weber.
I have one 40DCOE but, I will need other one and inlet manifold to make a pair and set up is not correct setting on one I got.
It is setup for 1275 Mini.
Did you managed to run you car as it is?
I am making manifold myself and I will be making it as or similar to yours.
i.e. in 45 ish angle. I looked at R1 bike and they do look like in angle so I will keep it at that I think.

Let me know how you cars run, and if it is difficult to set up or not.

Cheers
Atchi


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 Post subject: .....
PostPosted: Tue Mar 09, 2004 6:19 pm 
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Location: Brisbane
The carbs should sit at the angle that keeps the fuel bowls at a horizontal angle.

Oh, the carbs are on the right way, too....lol

The carbs have no return line, just one fuel line entering in from underneath - the one line feeds all carbs. They run on very low pressure, about 4psi, with the floats determining fuel level in the bowl. All the other lines/pipes are basically breathers on it. If you need a diagram for it, just go visit your local Yamaha bike shop, I've found them to be quite helpful.

The car is waiting on an airbox to be done and will hopefully be finished and tuned sometime around the end of this month.

The fellow doing it has done quite a number of bike-carbed car engines with a great degree of success. Apparently the trick is in the air correction jets....he makes his own if he needs to....

When I have finished the carbs, I'll be posting up how things went.

And say hi to the "grumpy auld git" Iain, for me...lol

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Don't ask me, I don't know anything. And just because I'm a senior member, it does not mean I have as many wrinkles as ellpee. 1500+ posts and still I haven't got a clue.


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PostPosted: Wed Mar 10, 2004 6:04 am 
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Location: Durham, UK
Thanks for the info.
I will have look my carb again and see what I need to do.

I might go and visit my friend at Bike shop.

Cheers
Atchi


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 Post subject: .....
PostPosted: Wed Mar 10, 2004 5:17 pm 
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The machinist that made mine made up a steel mould (as he does a few) that shaped a piece of 40mm alloy pipe, when used in a press, from round to oval. This was then welded to the original flange and all the foining areas filled with weld. He then ported this out to an appropriate runner and port shape for good airflow.

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Don't ask me, I don't know anything. And just because I'm a senior member, it does not mean I have as many wrinkles as ellpee. 1500+ posts and still I haven't got a clue.


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 Post subject:
PostPosted: Thu Mar 11, 2004 7:00 am 
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Joined: Fri Nov 28, 2003 4:21 pm
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Location: Durham, UK
I'm trying to do same method but the tube I need was only sold for 3m.

I will need max 400mm.... too expensive.
I got 3mm aluminium plate and I shall try hitting in to shape then weld it.

Ah also, you are right about direction of the carb.
Even though,batter fly will open in opposite direction to SU and Weber carbs.
What did you do for the air box and filter?
I'm still not sure about vacume pipe, though.

I will take photo and send it to you.

Cheers
Atchi


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 Post subject: .....
PostPosted: Thu Mar 11, 2004 7:48 pm 
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Location: Brisbane
Once the work is done, I will be adding pics to my personal album page. Hopefully by two or three weeks time.

_________________
Don't ask me, I don't know anything. And just because I'm a senior member, it does not mean I have as many wrinkles as ellpee. 1500+ posts and still I haven't got a clue.


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