[Spridgets] Rejetting carbs for high altitude

JLC breton48 at live.com
Mon Mar 23 12:47:40 MST 2009


Yes, some of the modern stuff is cool!

With the Webers, the only adjustement screws are for the idle, so as soon as
the main jets kick in, you have no way to adjust the mixture - hence the
need to change the jets.

When I lived in England at the time Spridgets were built, the Webers were
thought to bring mythical powers to an engine! Nowadays, I wished my Lotus
came with SU carbs instead of Webers. I am sure they would give me ample
power without the complexity of the Webers.

JLC

Glen Byrns wrote:
On my Sprite I would turn the mixture nut up two turns at altitude and all 
was good.  Last day of vacation, headed "downhill", two turns richer and all

was back to normal.  With the Megasquirt fuel injuection, the built in MAP 
sensor adjusts the mixture based on ambient pressure and no need to even 
think about it.  For LotO, I crossed the Rockies and Sierra crests twice 
each with no loss of power and no re-tuning.  Carbs are simple and 
dependable, but some of this modern stuff is pretty cool too.


More information about the Spridgets mailing list