also..if you've got a single carb it must be a stromberg...be sure that the
rubber diaphram is seated properly(with the notch in the correct spot)..and
be sure it is not split..if you have a split in the rubber the car might
start and then die almost immedietly .
----- Original Message -----
From: "RACER BUD" <budscars@comcast.net>
To: <fot@autox.team.net>; "George Harmuth" <harmug@us.ibm.com>
Sent: Sunday, April 25, 2010 12:50 PM
Subject: Re: [Fot] No vacuum after Spitfire engine rebuild
> if your timing is way off you won't have vaccum to suck the gas in..maybe
> your distributor is way out..
> Racer Bud
> ----- Original Message -----
> From: "George Harmuth" <harmug@us.ibm.com>
> To: <fot@autox.team.net>
> Sent: Sunday, April 25, 2010 12:23 PM
> Subject: [Fot] No vacuum after Spitfire engine rebuild
>
>
>> Time query the collective again. My son and I just finished a rebuild of
>> his 72 Spitfire (1296, large journal) and I can't get it to run. The car
>> will start up on starting fluid but won't even fire on it's own.
>> Confirmed
>> fresh gas to carb, gas in fuel bowl, disassembled carb, cleaned and
>> inspected, looks OK and was working (rebuilt last summer) before engine
>> rebuild.
>>
>> Think I've tracked it down to no vacuum, either from the vacuum port
>> (flat
>> 0 reading on gauge, no fluctuations ) on the carb or gross check, putting
>> my hand (or carb sync gauge) over the mouth of the carb. I've removed the
>> carb and intake manifold, gaskets etc all look good. Removed the valve
>> cover and plugs, verified ( multiple times) cam to TDC on cylinder 1
>> positions. The valves open in the correct sequence with respect to the
>> piston position, rechecked the valve clearance, are all set to .015.
>> Compression is a little low (1-4, 110.115,118,115) but the engine has
>> less
>> than a minute of run time, I expect it will rise a bit as it breaks in.
>>
>> The engine was working before the rebuild but it had low (ave 70Lbs)
>> compression on 3 cylinders. I found 3 broken top rings, I suspect the PO,
>> who had the car sitting for years, didn't do a proper job when he re
>> fired
>> the motor before he put it up for sale and the rings broke. The block was
>> clean, looked like a recent (milage wise) rebuild on it but we replaced
>> rings, bearings, new valves and springs etc.. The cylinder bore was
>> inspected, measured and honed. The only parts not stock were a little
>> hotter grind on the cam, nothing radical and a Maniflow header to replace
>> the stock manifold.
>>
>> Any idea where I screwed up or what I can check before I do a teardown?
>>
>> thanks
>> mike
>>
>>
>>
>> G. Michael Harmuth
>> _______________________________________________
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>>
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