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Meharidude
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Joined: 13 Apr 2011
Posts: 20
Location: denmark

PostPosted: Wed Apr 13, 2011 11:35 pm    Post subject: 652 questions Reply with quote

I am fitting a 652 in my Mehari, however can anyone tell me the functions of the hoses on the carb, and the function of the 2 connections on the rubber elbow? Tried Jeroen, but it didnt shed any light on the subject.

Btw, newbie here, but i have been a member on several other lists, and been driving Mehari since 93.

Kim denmark
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Meharidude
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Joined: 13 Apr 2011
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PostPosted: Thu Apr 14, 2011 10:01 pm    Post subject: 652 Reply with quote

I cant belive that noone here knows, i mean there are so many here using the Visa engine..
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Jasu
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Joined: 30 Sep 2007
Posts: 211
Location: Finland

PostPosted: Thu Apr 14, 2011 11:50 pm    Post subject: Reply with quote

I can't believe that somebody suppose to have instant replie to any question this kind of forum where answering isn't necessary for anyone..? Laughing

Well, one of these hoses is for ventilation of float chamber, another is for controlling air intake flap (cold or heated air).
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Meharidude
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Joined: 13 Apr 2011
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Location: denmark

PostPosted: Sat Apr 16, 2011 12:20 pm    Post subject: Reply with quote

i guess i am spoiled with fast responses on the other forums i am on..

Okay, back to the Visa engine..
Blocking off the hot/cold hose, feeding the floatbowl ventilation to the airfilter, and blocking off the vacuum advance hose should be alright then..

Next, what airfilters will fit? I have limited height available, actually the 2CV rubber elbow is rubbing the inside of the bonne alreadyt, so looking for some sort of bolt-on pancake type..
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Harley
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Joined: 26 Nov 2007
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Location: Braidwood - Australia

PostPosted: Sat Apr 16, 2011 1:00 pm    Post subject: Reply with quote

One of these works fine: Uni-Filter
Insert a piece of pipe into the original rubber elbow to attach it, i have been using it for years.

Harley
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Meharidude
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Joined: 13 Apr 2011
Posts: 20
Location: denmark

PostPosted: Sun Apr 17, 2011 12:54 pm    Post subject: Reply with quote

Harley wrote:
One of these works fine: Uni-Filter
Insert a piece of pipe into the original rubber elbow to attach it, i have been using it for years.

Harley


My Visa elbow is too tall due to thed connections for the hot/cold air hoses. But would a 2CV elbow be too restrictive or should i try to find a Visa elbow without the connections?

Sump breather: I was thinking about using a 2Cv reniflard and route it as on a 2CV, would this be ok? (Until further i would be using the 2CV filter, knowing its too restrictive,)
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Meharidude
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Joined: 13 Apr 2011
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Location: denmark

PostPosted: Sun Apr 17, 2011 4:09 pm    Post subject: Reply with quote

Hello again, new question, the sump breater divides by a t-piece under the oilfiller neck. What would the best solution be: Either just block the hose for the airfilter, or fit a 2CV oilfiller neck?
kim
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Meharidude
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Joined: 13 Apr 2011
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PostPosted: Fri Jan 16, 2015 3:24 am    Post subject: Reply with quote

Ended up with this solution.
Seems to work..

After rejetting to 135/140, it runs perfectly. The connection on the side of the elbow to the fuelbowl balances out the slight overpressure from the fan induction. Important thing to remember. Jeroen Cats calls it an overflow, but it is a venting tube. I have tested the pressure between carb and filter at 100-110, wide open throttle, and there is indeed a small overpressure, however small..

Topspeed, using a Dyanebox and 145r15 tyres, 125km/h @5800 rpms. Not bad for a Mehari. 0-100 in 23secs.
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Pietro
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Joined: 17 Aug 2007
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PostPosted: Mon Jan 26, 2015 3:23 pm    Post subject: Reply with quote

Meharidude wrote:
The connection on the side of the elbow to the fuelbowl balances out the slight overpressure from the fan induction.

Not just overpressure as there is no induction fan on the second generation visa engines.
They have the same type of connection between the carb lid and rubber elbow.

Meharidude wrote:

I have tested the pressure between carb and filter

So did the gentleman here: http://www.korridor.se/aryan/acadiane/turbo/index.html#2.html
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