[TR] Fuel Pressure for Spitfire MK III ?

[David Porter]

remove the piston chamber, turn the key-pump on. If fuel is pumping 
through the jet then.. pressure too high, floats adjusted improperly, 
needle and seat stuck open, etc..
  I would say that 4.5psi is about tops for the Strombergs..better tan 
SU's but not by much..
DP

On 11/16/2015 12:12 PM, Bud R wrote:
> What is the recommended and/or best fuel pressure for a Spitfire MK 
> III with a single ZS carb? In checking it shows 4.5 -5 PSI on a gage. 
> I try to keep it close to 2 PSI or less on my dual ZS equipped TR6 or 
> it develops a cough at idle, so it makes me wonder if the fuel pump is 
> overwhelming the float needles.
>
> With the Spit (this is the road Spit not the race car) it idles fine 
> but the first attempt to accelerate it bogs down then catches then 
> bogs some more and so on. I’m going to switch the distributor out and 
> the coil to see if my fuel problem is actually an ignition problem…you 
> know that old saying.
>
> Thanks
> Bud Rolofson
>
> Extreme Parts Racing (more than just a haircut)
>
> 71TR6 CC57365 (Good 6)
> 71 Spitfire MK IV Race Car #3
> 69 Spitfire MK III (back up FE engine/dinghy car)
> 93 Minnie Winnie Race Support Vehicle
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>
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-- 
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM 
87107 505-352-1378 Go HERE: my world www.porterbikes.com/
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