1834 Vws...

Mick Bevan · Post by **Mick Bevan** » Wed Oct 06, 2010 8:55 pm

Hello all,
Im back in after a 7-year lapse.Couldn't stay away, really.

Now, what is the optimum carburettor for an 1834 VW? The one I'm familiar with has a Solex 32 PHN.It was built without air filtration of any kind so what would be a good filter to fit to it? It's fitted to a VP-2 and appears to be as per plans, without an air filter and with a short induction pipe to the carb, which is on top of the engine. Also, what is the optimum oil pressure? Our one typically shows about 40psi at start-up and then drops to and stays at about 10psi in operation.
last thing, what is the optimum exhaust pipe length for an 1834?
regards
Mick

Nigel Ramsay · Post by **Nigel Ramsay** » Fri Oct 08, 2010 1:29 pm

Take a look here at this thread
http://www.lightaircraftassociation.co. ... php?t=2349

Sounds like your hot running pressure is rather low?

One opinion of the ultimate carb for an 1834 is a Stromberg CD150 (Barry Smith recommended this to me). As for exhaust length, there is a formula for ultimate length from exhaust seat to exit, but there are so many variables to consider, weight becomes the governing factor generally and most aero VW's seem to have 4 stubs, with a variety of silencing options!

As the aero engine is supposed to run at a constant rpm, achieving the best compromise of power/torque/consumption has to be the main aim.

Mick Bevan · Post by **Mick Bevan** » Fri Oct 08, 2010 6:21 pm

Hi there,
As soon as I had posted, I realised that I simply should have done a search first.Doh! Anyhow, thanks for the gen.
regards
Mick

Time to investigate oil pressure.

Mick Bevan · Post by **Mick Bevan** » Sat Oct 09, 2010 8:10 pm

Hi all,
Has anyone brought in the Valley Engineering PSRU? They seem to be widely used in the USA for such as 80% Nieuports and the like. Are they accepted by the LAA?
Apart from that, anyone using a Type 4 conversion?
regards
Mick