Carb swap

[ian]

So it would seem that my 9/69 FJ40 has the dreaded short production Aisan on it. Rather than sending a notoriously bad carb off for rebuild, I'm thinking about buying a '74 Cali carb.

I have a few questions before buying...

Can the EGR be corked without problem? Any reasons to avoid the Cali carb all together? It looks taller due to emissions junk.

How do I mate my air filter to this carb? My old carb has a "seat" for the air filter housing and gasket. The throat on this one has no such seat. SOR lists a carb clamp that looks like it might be the ticket. I can't get a close enough view to be sure.

Any other caveats I should be aware of?

Thank you,

Ian

 

[ian]

No replies yet.. Does anyone have a pic of their 70-74 carb w/ this clamp on it? Maybe a shot of the underside of filter housing as well? I'm curious how they mate.

Thanks.

 

[zetasig]

Might try Jim Chenowith of TLC performance. He would be able to answer most all of your questions

fj40jim@aol.com

 

[65swb45]

If you have the dreaded 'short production' carb, that would be the one with the air cleaner stud and the corresponding hole in the air cleaner. The clamp you are speaking of will not work with this air cleaner. Hth Mark

 

[FJ40Jim]

<<So it would seem that my 9/69 FJ40 has the dreaded short production Aisan on it. Rather than sending a notoriously bad carb off for rebuild, I'm thinking about buying a '74 Cali carb.
I have a few questions before buying..
Can the EGR be corked without problem?>>

Ian,
The EGR can be eliminated and smoothed over, no problem. I like this mod because it helps keep the top half of the carb from soaking up so much engine heat.

<< Any reasons to avoid the Cali carb all together? It looks taller due to emissions junk.>>

It is taller than your current carb and a normal 70-74 carb. The linkage is the only bad thing with the 74.

<<How do I mate my air filter to this carb? My old carb has a "seat" for the air filter housing and gasket. The throat on this one has no such seat. SOR lists a carb clamp that looks like it might be the ticket. I can't get a close enough view to be sure.>>

The air filter lid will need to be changed to the 70-74 style.

<<Any other caveats I should be aware of?>>

Yes, there are several other little changes from the 69 to the later carbs. The 74 will require changing to mechanical pushrod throttle linkage. You can get around this by using the rare 1973 adapter bellcrank assy that converts cable pull to throttl pushrod. Last I checked SOR still listed them used for a reasonable price. Fuel line(s) are different. Throttle cables are different. You will need to change to a 1970-1973 throttle cable.

 

[alstaz]

I feel your pain

I too have the same short lived carb on my rig (7/69) I think rather than go through all the hastles I will get a carb kit and try to rebuild it myself. We'll see what happens. My fingers are crossed.

 

[ian]

Forget that! I hadn't even thought about the differences in throttle linkage. Anyone have a 70-9/72 carb lying around?

I'll hit the local TLC wrecker to see if he's got any avail for cheap.

Debating just rebuilding this one and swapping to new carb when/if I go 2F or SBC. Jim, I'll post you to see if you have rebuild kits for these.

One last question for this thread.. the hand throttle on my rig goes all the way out to the carb. It doesn't actuate the pedal. Is this normal for this series or did a PO change it up? I've yet to see a diagram with this configuration.

 

[Landpimp]

yep, it goes right to the carb, latter 40's and 60's+ goes to the pedal

One last question for this thread.. the hand throttle on my rig goes all the way out to the carb. It doesn't actuate the pedal. Is this normal for this series or did a PO change it up? I've yet to see a diagram with this configuration.