Bristol Engines

[Kevin H]

Originally Posted by Geoff Kingston

Claude,
The survey is an excellent idea but I can't seem to get the link to it to work it takes me to the part of their site that allows you to create a survey rather than answer questions, any idea what might be wrong

There were a couple of extra/unwanted characters on the end of the raw URL. I have now removed them from Claude's post.

Try this one http://www.surveymonkey.com/s/GCZQ3TJ

Kevin

[Geoff Kingston]

Thanks Kevin,
That worked fine lets hope enough people are interested to make this a viable and affordable project.
Geoff.

[Hal]

Claude..Guys,

Its a great idea to come up with a pricing idea and a list of people who are in search of engines.

Sometime in the next few weeks, i will try and speak to my contact about casting the replica heads and blocks. If he thinks that he can do it, then i'm happy to carry the baton, as i also know of some people who could machine the castings afterwards.

What do people think about tinkering with the design to gain more power,
2.5 / 3 litre etc.

[kfitzgerald]

There is a reason that Bristol went to 2.2 liters and not 2.5. If you
bore out the engine that much you are looking at new piston designs,
connecting rods, and most important a revised crankshaft. The fuel fog
problem may dissipate with more space to suck in the fuel.
I am a fence sitter on the project. If a new block were available would
I buy one, it is price dependent. Do I want to commit myself today to
buying one, no.
I like the idea.
Another Kevin

[technicaltom]

I have been following this thread with interest and would like to add an observation regarding engine capacity.The cylinder head at present when as standard has a certain intake port capacity/volume usually described in cubic centimeters( CCs)and has an ability to flow so many cubic feet per minute(CFM) All very basic stuff that applies to any engine.So if a new block was manufactured with a little more room/clearence for a longer throw on the crankshaft,or larger diameter cylinder liners , or both, then extra capacity maybe up to or even more than 3 litres would be possible.
Now the cylinder head with its siamesed inlet tracts will need to be able to flow more CFM to feed the extra capacity therefore the new head will need a slight redeseign to allow it to breathe better, all this = more hp.
With some careful research its possible that con rods could be sourced from another engine,as Brabham did many years ago on their Repco FI engines,if memory serves me right those con rods were standard Daimler Dart 2.5 V8 items.Pistons are not an issue as custom pistons are available from numerous manufacturers and relatively cheap.The crankshaft could be sourced from many countrys nowadays. I look forward to others views . Tom

[Geoff Kingston]

Kevin,
The last time I looked at Bristol Cars website in the section covering upgrades there was mention of a. 2.5 liter engine, I assumed that this was a conversion of the existing engine but when I was speaking to Peter Jaye about his new cylinder heads he told me this was going to be based on. new block castings. made or about to be made by IN Racing and that his heads would fit this block.
Bristol Cars obviously think these problems can be overcome quite probably with the other additional new parts you outline, but I would certainly be interested in the larger engine option if it were available.
Another thought but what about a project based on the Larger BMW engine that the Aldingtons wanted Bristol to use instead of the 328 unit, that must have been designed to fit the same type of chassis layout as the smaller unit, same probably goes for the post war BMW V8 though that may be even shorter supply than the Bristol unit.
Geoff.

[Kevin H]

If you are going to vary the capacity and design of the new engine you should probably look at incorporating this into any survey of the potential market, because purists may be put off by something which moves too far away from the original.

Kevin H