From: Jason James on

"John_H" <john4721(a)inbox.com> wrote in message
news:kp6d561j3m57jfaa44hen4vgvfi0dq2t1g(a)4ax.com...


>
> As an example of the latter I once owned an ex GovCo VJ ute with a 215
> Hemi fed by an Email single choke carb. It did 13mpg as I got it,
> which everyone who ought know said was normal. A rework of the Email
> (substitute jets weren't available but were easily made) and a general
> tidy up (new timing chain, etc) doubled it. It returned a consistent
> 26mpg for the rest of the time I owned it. I can only guess that back
> in the days when fuel was around 5 cents a litre Chrysler didn't
> reckon it was worth the trouble to fine tune 'em.

It sounded like the power-valve was permanently open,...as I had in a VH 245
with the Carter single barrel. The 265 Rangers had the same carb in the VH
range. The power-valve was operated by a vacuum diaphragm. If the diaphragm
was torn or ruptured, the valve was stay open giving about 14 mpg in my
car's case :-) Its a pretty worn step-up needle to half economy !

Jason


From: John_H on
Jason James wrote:
>"John_H" <john4721(a)inbox.com> wrote in message
>news:kp6d561j3m57jfaa44hen4vgvfi0dq2t1g(a)4ax.com...
>>
>> As an example of the latter I once owned an ex GovCo VJ ute with a 215
>> Hemi fed by an Email single choke carb. It did 13mpg as I got it,
>> which everyone who ought know said was normal. A rework of the Email
>> (substitute jets weren't available but were easily made) and a general
>> tidy up (new timing chain, etc) doubled it. It returned a consistent
>> 26mpg for the rest of the time I owned it. I can only guess that back
>> in the days when fuel was around 5 cents a litre Chrysler didn't
>> reckon it was worth the trouble to fine tune 'em.
>
>It sounded like the power-valve was permanently open,...as I had in a VH 245
>with the Carter single barrel. The 265 Rangers had the same carb in the VH
>range. The power-valve was operated by a vacuum diaphragm. If the diaphragm
>was torn or ruptured, the valve was stay open giving about 14 mpg in my
>car's case :-) Its a pretty worn step-up needle to half economy !

215's were a lot thirstier than the 245 ex factory. The reason being
most, if not all 215's were originally sold as government fleet
vehicles. Govco's specification said all its vehicles had to run on
standard petrol but apparently they didn't care how much of it they
used. Consequently the 215 ran a very low CR (around 7:1 IIRC).

It also had exactly the same single choke carb as used on the 245,
with the jetting unaltered... ie it was never retuned for the 215.
The carb was a Carter design manufactured in Oz by Email. The main jet
wasn't meant to be replaceable and wasn't ever available as a spare
part. The "power valve" was a vacuum actuated step up rod that went
through the main jet.

I pressed out the main jet and made up a replacement, which was
progressively enlarged until it ran smooth at steady speed (the same
way as you'd initially jet a Holley). It was still rich under load so
I substituted a larger step up rod out of something else (probably the
twin choke Carter some 245's had). All up it took about the same
amount of time as it does to set up a Holley as it comes out of the
box. At the time I reckoned it was an evening well spent. :)

--
John H
From: D Walford on
On 2/08/2010 10:43 PM, Toby wrote:

> But what could something like a APEXI super AFI or similar really manage
> these days;-)

Mate uses Microtech ECU's on his 2 Lotus 7's, the race car has the
device that is used to adjust the ECU screwed to the dash so
theoretically you can adjust the ECU whilst driving although that might
get a little hairy trying to do that at full noise on a race track:-)


Daryl