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Re: [Spits] 79 Spitfire with SU carbs

To: spitfires@autox.team.net
Subject: Re: [Spits] 79 Spitfire with SU carbs
From: David Woerpel <dwoerpel@wi.net>
Date: Thu, 28 Jun 2007 00:43:35 -0500
Thanks to all who have responded.  We've ordered some parts and made 
some calls.  Joe Curto told me that he's had a few TR's come in with 
after-market MECHANICAL pumps that are putting out too high a pressure.  
Anyone else run into that?  We'll put the old pump back on or get a good 
regulator and gauge.   The carbs are FZX 1258's which calls for a 
standard metering needle of "ABT".  Also, I hate to admit I didn't 
notice that there were no piston springs (I'm used to working on H1's 
for the Bugeye which have no springs but I should have caught that 
anyway...duh.)

Given the fact that the car is desmogged is the timing still 10* BTDC?

Neil, I'm not sure what you mean by "reversion" issues?  I shall find 
the answers to your questions.

Again thanks for the help...we'll see what Thursday brings!
Dave

Neil Penberthy wrote:
> I'd suggest checking that you have the right needle. Also you mentioned some 
>modification to the motor - head skimming - relatively small changes to the 
>stock set up can require non standard needles etc. The exhaust was swapped on 
>my car and with the stock needles it would barely run.
>
> Also was the head work done at the same time as the carb install? There may 
>be all kinds of factors in play if that is the case. Assuming that the head 
>work is OK there can still be all kinds of unforeseen issues such as reversion 
>issues etc.
>
> I think we need more information to really get to the bottom of you problem.
>
> Good luck!
>
> Neil
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