[Spits] 79 Spitfire with SU carbs

[David Woerpel]

Roger,
2 - 2 1/2 lbs. is all SU's need.  Get a regulator and a guage.  Mount 
the guage on a "T" downstream of the regulator.  The regulators with the 
numbers on them aren't all that accurate.

I have to ask again........Should this 79 1500 with SU's and a couple of 
thou skimmed from the head still be timed to 10* BTDC?
Dave
Burlington WI


Roger Elliott wrote:
> I have been chasing similar problems for quite a while.  It never 
> occurred to me that the problem could be too high of fuel pressure.
>
> What did you need to set the pressure at to make the car run correctly?  
> I stopped at Napa, they had one that could be adjusted 2 - 4 pounds and 
> one that could be adjusted 4-9 pounds.
>
> Thanks,
>
> Roger Elliott
>
> Paul Meyer wrote:
>   
>> Several years ago I swapped carbs on my '78.
>> Similar fuel problems resulted, which were eventually identified as being 
>> caused by the new carb requiring less fuel pressure.  Idle was ok, but as 
>> soon as I increased rpm or fiddled with the choke, it would roughen or 
>> stall.  I too replaced the fuel pump, but that only made things worse.
>>
>>
>> I put in a cheap, in-line fuel pressure regulator, and got some improvement, 
>> but the cheap regulator caused flow problems in high rev conditions.
>>
>> Ultimately, I put in a higher quality fuel pressure regulator, and that 
>> solved it.
>>
>>
>>
>> Paul F. Meyer
>>
>> Home Phone:    781-551-8574
>> Cell Phone:       781-801-3170
>> e-mail:               paulfmeyer at msn.com