[Healeys] Maximum 2.6 Bore

[Austin Healey]

I dont have a 2.6 block at hand, but I think according to my pictures, it
is possible to optimize the piston wall thickess by offset boring. Maybe
thats the trick they also used. I am sure it can make a great difference.

Gergo


2013/4/30 Austin Healey <pajtamuvek at gmail.com>

> I dont have a 2.6 block at hand, but I think according to my pictures, it
> is possible to optimize the piston wall thickess by offset boring. Maybe
> thats the trick they also used. I am sure it can make a great difference.
>
> Gergo
>
>
> 2013/4/30 Patrick & Caroline Quinn <p_cquinn at tpg.com.au>
>
>> G'day
>>
>>
>>
>> I think it's an open ended question.
>>
>>
>>
>> The engine in the BN3/1 is exactly the same C-series engine that Geoff
>> Healey was provided with by BMC way back in 1954 and was initially so
>> disappointed in as far as power goes. It is a C26W engine which means that
>> it was originally built for a Wolseley car. He then undertook quite a few
>> experiments on the engine in the car, including fitting triple dual throat
>> SUs before he was satisfied with the power. Sadly today I do not have
>> those
>> SUs nor can I afford to have them built.
>>
>>
>>
>> However when I bought the car back in 1974 it was fitted with standard
>> 3000
>> pistons and I have all the service records going back to 1965. So sometime
>> between 1954 and 1965 it was bored out to take the pistons and ran
>> perfectly
>> well through to Easter 2011 when it lost part of No 2 piston which means
>> it
>> was not the fault of the block.
>>
>>
>>
>> Watch this space.
>>
>>
>>
>> Hoo Roo
>>
>>
>>
>> Patrick Quinn
>>
>> Sydney, Australia
>>
>>
>>
>> From: Derek Job [mailto:derek.c.job at gmail.com]
>> Sent: Tuesday, 30 April 2013 6:07 PM
>> To: Michael Salter
>> Cc: Patrick & Caroline Quinn; healeys at autox.team.net
>> Subject: Re: [Healeys] Maximum 2.6 Bore
>>
>>
>>
>> Great article Mike.
>>
>>
>>
>> I'd like to provide a link to it in my 100-Six Web Site if that's Ok
>>
>>
>>
>> Derek
>>
>> www.healeysix.net
>>
>>
>>
>> On Mon, Apr 29, 2013 at 11:51 PM, Michael Salter <michaelsalter at gmail.com
>> >
>> wrote:
>>
>> For those with further interest in this subject I have published a short
>> blog article here <http://www.netbug.net/blogmichael/?p=1130>.
>>
>> Michael S
>>
>>
>> On Mon, Apr 29, 2013 at 7:57 AM, Patrick & Caroline Quinn <
>> p_cquinn at tpg.com.au> wrote:
>>
>> > G'day
>> >
>> >
>> >
>> > Perhaps someone out there might be able to assist.
>> >
>> >
>> >
>> > The engine from the Quinn Austin-Healey (not the soft touring car with
>> > wind-up windows and a glove box, but the other one) is with the engine
>> > rebuilder.
>> >
>> >
>> >
>> > It is an early 2.6 litre C-series with a smooth sided crankcase. The
>> > standard bore of which is 79.375mm and according to a well known parts
>> > supplier cannot be bored out past +60 which would take it to 80.875mm.
>> >
>> >
>> >
>> > When I removed the cylinder head I thought the pistons looked a little
>> big,
>> > and sure enough the bores were measured today and they are 3.281 or
>> > 83.34mm.
>> > This is standard 3000.
>> >
>> >
>> >
>> > Number 2 cylinder is scored and will probably need to be sleeved.
>> >
>> >
>> >
>> > Has anyone had an experience at taking a 2.6 engine past its
>> 'permissable'
>> > limit?
>> >
>> >
>> >
>> > Hoo Roo
>> >
>> >
>> >
>> > Patrick Quinn
>> >
>> > Sydney, Australia
>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation  $12.75
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>>
>> Healeys at autox.team.net
>> http://autox.team.net/mailman/listinfo/healeys
>>
>> Unsubscribe/Manage:
>> http://autox.team.net/mailman/options/healeys/pajtamuvek@gmail.com