Fuel pressure???

[Douglas]

Not to split hairs, but heating then quenching is hardening. Annealing is when you heat it, then stick it in some lime or wood ash to let it cool very slowly.

I had wondered about annealing Cu, and if it showed heat like steel or if it was like Al, and you just had to "know".

Heating then quenching is hardening for carbon steel( among others). It is *NOT* the way Cu works. This one has a neat instruction for dealing with Al...
http://www.motorcycle.co.uk/Reference-m ... shers.aspx

Quenched carbon steel makes Martensite...there will be no Martensitic Cu.
cheers,
Douglas

[dpuckett]

My bad. Thanks for the correction. Dont build too many horseshoes or tools out of Cu. Do some Al shoes, though.

Interesting note about the soot on the Al. I had been told that when the Al stock sticks as you slide it over the edge of the anvil, it it ready to work. Does letting it sit for a few weeks actually make it harder? I had been told that.

DP

[Douglas]

My bad. Thanks for the correction. Dont build too many horseshoes or tools out of Cu. Do some Al shoes, though.

Interesting note about the soot on the Al. I had been told that when the Al stock sticks as you slide it over the edge of the anvil, it it ready to work. Does letting it sit for a few weeks actually make it harder? I had been told that.

DP

hey-Hey!!!,
The aircraft folks keep their anealed Al rivets in the freezer until they're ready to use them. Some Al alloys harden up rather quickly at room temperature( precipitation hardening ). Pure Cu work hardens nicely, and I suspect that a far more gradual cooling would suffice, though dropping it into a glass of water takes care of my doubts on the subject...

I chased the thread Rich pointed me to and chased a few inside it. Seems there is two variants of this pump with two different springs( to set the fuel pressure) and two bore sizes. The bigger bore one also has the stiffer/higher pressure spring. For the VE app I suspect the big pump with the weaker spring would do quite well and not put the VE seals at risk. While it would deliver lower pressure I bet it wouldn't drop as much on high demand. For a near-stock pump like mine it would matter little, and its main value would be for purposes of entertainment...
cheers,
Douglas