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Erratic running at full revs?

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Erratic running at full revs?
peter john Offline
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Joined: Jun 2018 Posts: 2 Threads: 1
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#1
23-06-2018, 01:49 PM
I am restoring a 1936 A7 two-seater sport. It has a standard two bearing engine. It came fitted with an SU carburetor (1 inch bore at the manifold type 617p) and an electric fuel pump. The problem I have is that when the engine reaches full revs it fades after a few seconds and then picks up again only for the same thing to happen again. I assume it is to do with fuel starvation, but the pump functions well, so I am very puzzled.  Is it the wrong carb for the car, or could it be something else?
I have tried different needle sizes to no effect as well as altering float level etc.
 
Any ideas please…..?!
 


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Messages In This Thread
Erratic running at full revs? - by peter john - 23-06-2018, 01:49 PM
RE: Erratic running at full revs? - by Jamie - 23-06-2018, 02:11 PM
RE: Erratic running at full revs? - by bob46320 - 23-06-2018, 03:56 PM
RE: Erratic running at full revs? - by peter john - 23-06-2018, 05:52 PM
RE: Erratic running at full revs? - by dickie65 - 23-06-2018, 06:24 PM
RE: Erratic running at full revs? - by Stumpi - 23-06-2018, 08:10 PM
RE: Erratic running at full revs? - by Bob Culver - 23-06-2018, 10:20 PM
RE: Erratic running at full revs? - by GK5268 - 23-06-2018, 10:59 PM
RE: Erratic running at full revs? - by Chris KC - 24-06-2018, 08:38 AM

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