Howell V-Twin

[mayhugh1]

Cannot see that bit of plastic lasting very long.

I've put that same pump in six different gasoline engines (including a Howell V2 and V4) over the past dozen years or so and have never had a bit of trouble with any of them. One will likely end up in the Offy that I'm currently building. - Terry

 

[bluejets]

Yes, well I didn't refer to how many but rather how long it will last.
Many engines rarely get used, most sit on a display bench and start every now and then.

 

[Cogsy]

Yes, well I didn't refer to how many but rather how long it will last.
Many engines rarely get used, most sit on a display bench and start every now and then.

I've got bits of plastic that get used every day and are years old - not all plastic is junk.

 

[Peter Twissell]

If it's the right flavour of plastic for the job, there's no reason why it shouldn't last. Fuel pumps in modern road cars are mostly plastic.

 

[gilbycoath]

I have often read about using citric acid for a pickle/ cleaner. and substitute for sulfuric
I have some citric acid in powder form with instructions for use in cooking, can anyone give me a clue as to mixing ratio for our use?

 

[Cogsy]

Last time I made a batch for pickling I just put a bunch into some DI water. Citric is a 'weak' acid (so doesn't fully dissociate in solution) so it should be difficult to get too 'strong' a solution to cause any issues. I don't remember the ratios I used but I'd start with a couple of tablespoons of powder into a cup of water and see how that goes.

 

[Peter Twissell]

I use citric acid for de-rusting, by dissolving as much as I can in water. As Cogsy says, you can't make it too strong.
Also popular with my wife for removing limescale from shower, taps, kettle etc. It's always good to find a 'domestic' use for workshop requirements - helps to keep the peace!

 

[gilbycoath]

Thanks guys, I will give it ago.
I have always used vinegar with a little salt added ( when ever it is quoted it is always "a little salt') A friend how has good knowledge of chemistry tells the salt is bad for steel and all it does in the vinegar is to speed up the process.
Thanks again

 

[kuhncw]

Jon,

Too bad about NAMES this year. I'm look forward to seeing you and your Vee Twin at NAMES 2021.

Take care.

Regards,

Chuck Kuhn

 

[DiegoVV]

The aluminum parts are clear anodized. I use sand paper and a Scotch-Brite pad to remove machining marks before I sent them out to be anodized.

Nice done!! I love the fine matte finish of your pieces