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Xflow 1300 race engines info please
pigiron - 26/10/14 at 01:04 PM

This may be slightly off topic for this forum but I know there is a wealth of experience amongst it's members hence my request of information.

I am planning the build of a Ford Crossflow 1298 race engine, it is for a French 'non FIA' historic 1300cc race series.

I remember that years ago the formula 2 stock cars ran some very high reving 1300 Kent motors, by the way they sounded I assume they must have been all steel and forged pistons etc.

I have heard claims that they were producing around 145bhp?

Can anyone shed any light on the detailed specification of these engines, i.e valve sizes, cams etc, any information would be gratefully received.

Dick - 26/10/14 at 01:53 PM

Think your find they over sized the 1100cc motors so had very short stroke with large pistons was talk also that the pistons had the pins moved to the downside of center

snapper - 26/10/14 at 02:18 PM

I recommend posting on Turbosports forum as they are Ford nuts and have proper knowledge and experience
Not that we don't here it's just that they specialise in Ford

DW100 - 26/10/14 at 02:36 PM

Yes that was the sort of power they produced. 145-150bhp

They share the same bore size as the 1.6 so you can use the same cylinder head, valves etc.

Build cost were somewhere around £5-10,000

Steel rods, crank, cam etc. Forged pistons. Dry sump and some trick head porting.

And 10,000+ rpm

Paul Turner - 26/10/14 at 06:27 PM

Formula 2 stock cars did indeed have screaming 1300 x-flows (before they were superseded by those pesky Pinto's).

But just remember that they did rolling starts and the revs dropped off very little due to the nature of the oval tracks.

Put one of those engines in a more conventional car and drive it on a conventional track and it would be a complete pig.

pigiron - 26/10/14 at 09:33 PM

quote:
Originally posted by Paul Turner
Formula 2 stock cars did indeed have screaming 1300 x-flows (before they were superseded by those pesky Pinto's).

But just remember that they did rolling starts and the revs dropped off very little due to the nature of the oval tracks.

Put one of those engines in a more conventional car and drive it on a conventional track and it would be a complete pig.


Yes, your comment about rolling starts is fair, some top end power would need to be sacrificed for a bit more torque at lower revs.

I remember the works/Broadspeed 1300 Escort circuit cars, they were very successful in the day, I understand Ford homologated a downdraught pre xflow head in group 2 for them, they reputedly produced140bhp, they managed 1st and 2nd at Nurburging in 1968.

mark chandler - 26/10/14 at 09:57 PM

Have a chat with George Polley, Polley Motorsport in Heathfield as he ran lots of these on oval circuits.

Paul Turner - 27/10/14 at 08:50 AM

quote:
Originally posted by mark chandler
Have a chat with George Polley, Polley Motorsport in Heathfield as he ran lots of these on oval circuits.


Polley Motorsport have not been in Heathfield for many, many years. They are Manea near Cambridge.

BaileyPerformance - 27/10/14 at 01:16 PM

where abouts are you?
My engine builder has years of experience in building X flow, worth a chat with him, he's in Telford.

Ron Jones Racing Engines 07866 278540