Tony, the stock line is 5/16" diameter. On the old 302 engine with a
Holley 750 CFM vac secondaries, I never had a fuel delivery problem.
When I restored the car, the old line was well, old, and I bent a 3/8"
line, which is 44% larger, which is more than enough for the 5.0L engine
with a Holley 600 CFM double pumper, according to Holley.
Larry
Tony McNulty wrote:
> Under those circumstances, I'd sure be looking at the delivery rate of that
> pump and/or diameter of the line from the pump to the carb (although the
> latter doesn't intuitively seem to be a limiting factor).
>
> That said, it's a long way from that tank and it's a pretty small fuel
> line -- has anyone ever looked into this as a basic problem or limitation in
> going to the larger throughput engines? I vaguely recall some STOA stuff
> from 20+ years ago on the topic, but memory's pretty dim .....
>
> Tony
>
>
>
>
>
> ----- Original Message -----
> From: "Kathy and Erich Coiner" <kathy.coiner@gte.net>
> To: "Tiger List" <tigers@autox.team.net>
> Sent: Saturday, February 15, 2003 8:42 PM
> Subject: Not enough go juice for my motor!
>
>
> I have been battling an intermittent problem for some time now.
>
> When I climb a steep enough hill at high enough speed, it begins missing
> like it is running out of gas. Until recently it had only occured on hot
> days so I always linked it with vapor lock or something similar.
>
> Well last weekend I took it out on a cool morning and tackled a 3 mile 8%
> grade at about 80 mph. The problem happened about 3/4 of the way up the
> hill. The engine temp was 200 and I know the gauge is accurate.
>
> I crawled under the car and found a place in the fuel line that had a big
> kink.
> I thought AHAA! I have found the problem.
>
> Today I bent up a new line and installed it. I took the car out at sundown
> today, and it did the same (*)*()#%$% thing. The car was running at 200
> again.
>
> Except for this annoyance, the engine runs flawlessly.
>
> It is a 260 with an Edelbrock 500 cfm car and headers.
> I am using the stock type fuel pump.
>
> The pump was replaced just before I bought the car in Oct 2001. It was
> replaced and then the owner found the root cause of his problem was the
> Pertronix igniter going bad.
>
> The only two things I can think to try are to test the fuel pump for flow
> rate, and check the carb float level.
>
> Anything ideas?
>
> Erich
>
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