INDIAN SOLEX CARBIES

[series1buff]

I have one of these fitted on my 2 litre motor and it runs very well.. for just over $100 US its so cheap. Why bother rebuilding an original when these are available ... brand new .

I modified the throttle linkage on it slightly .I used the L head version.. made for the Willys L head motor CJ 2 and WW2 Jeep .....The F head version isnt suitable for a series 1 motor I think.

I removed the high air inlet horn and the choke cable fits in from a different angle , but no problem at all. Various vendors in the US sell them , the prices vary wildly from 125 up to 160 .

Amazon.com: Omix-Ada 17701.01 Carburetor Solex Design L-Head for Jeep: Automotive



Carburetors Parts and Kits (http://store.mecimpex.us/capaandki.html)

MIKE

[Shonky]

The solex on Ambrose has an Indian made top cover from a Solex off a Nissan truck!

[series1buff]

few pics

CAEVEAT .. these carbies dont have a port for the vacuum advance . it seems to run OK without . . the vacuum advance mostly affects the low speed timing anyway ..

MIKE

[Sth65pacific]

Nice engine and attention to detail: You can eat off that one.. Superb work..

Ian

[series1buff]

re: Indian SOLEX I have discovered its a relatively easy job to drill and tap a 6mm hole for the vacuum advance fitting on the carby side.. there is a brass plug provided for the fitting .

I read up on the original Lucas dissy specs . On the original 1954 dissy 0n my 2 litre , the mechanical advance doesn't kick in until 1500 revs, so its very necessary to have the vacuum advance working to achieve the zoom aspect from take off.

MIKE

[series1buff]

The sage continues , but now all sorted. I found the correct location for the vacuum port . You can see where they made a spot for it , in the casting . I carefully drilled a 2mm hole and it came out just above the throttle butterfly ....

The following happens : As the butterfly opens slightly from the idling position , , it exposes the vacuum line port to the distributor, pulling the advance around . In the idling situation, the butterfly is closed and the vacuum port isn't exposed and the timing is retarded , this is also important for a static hand crank starting situation , broken fingers e.g.

[Aaron IIA]

The Vacuum advance is meant to give maximum advance at maximum vacuum, reducing advance as the throttle is opened. This gives you advance at idle, reducing as more fuel is introduced. Mechanical advance advances the timing as revolutions per minute increase. When hand cranking, minimum vacuum exists, so no vacuum advance either. When using a dynamic timing light, the timing should steadily advance with engine speed (due to mechanical advance), yet retard noticeably with an abrupt opening of the throttle (due to vacuum and hence vacuum advance disappearing).

Aaron.

[series1buff]

The Vacuum advance is meant to give maximum advance at maximum vacuum, reducing advance as the throttle is opened. This gives you advance at idle, reducing as more fuel is introduced. Mechanical advance advances the timing as revolutions per minute increase. When hand cranking, minimum vacuum exists, so no vacuum advance either. When using a dynamic timing light, the timing should steadily advance with engine speed (due to mechanical advance), yet retard noticeably with an abrupt opening of the throttle (due to vacuum and hence vacuum advance disappearing).

Aaron.

Hmmm,

Well at idle , theoretically, the advance vacuum port is closed off by the throttle butterfly, which means no advance is evident , apart from the static advance as on the flywheel marker.

As you open the throttle slightly from idle , the advance port is exposed (the port sits just above the butterfly) , thus the vacuum advance kicks in . So therefore, being closed off, the vacuum advance is NOT FUNCTIONING AT IDLE

You can check this yourself by looking at any chevy 216 engine Blitz or car dissy as the engine is running ( the whole dissy turns in that case, making it easy to see) , the dissy swings around , only after the throttle is opened up.At idle it returns to its static retarded position.

thats my take on it

MIKE