Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) 4/4 Sports - colour choice of Grey

Very true. Now if only I can find the dosh. Perhaps some Nigerian will help me via 419 scam or I'll win the lottery!!

John, have you considered the opportunity these gentlemen are offering

Already signed up & awaiting my 1000 shares to mature.

Hi do any of you 4/4 sport owners know of any one doing a go faster conversion/engine mod for the sigma engine. Or does it not need one. Ive never driven this model. What sort of performance does it have? It`s a very smart looking model especially with the race pack fitted.

Courtesy of Burton Power Web-site


Zetec SE

The name of this engine will confuse everyone because it’s an example of Ford’s multi-name units. It’s title is the Zetec SE but it’s also been labelled, as part of the growing Duratec series of late, plus it’s also called the Sigma in the US. However, it has nothing in common with any other Duratec or Zetec and no parts are interchangeable – confused yet? Told you!

The engine is all aluminium and designed in partnership with Yamaha. It is 16 valve and conforms to the current trend of interference fit/no-engine keyways, just like the Duratec I4. It also features a plastic inlet manifold, variable valve timing in the 1.7, solid lifters, aluminium girdle support unit incorporating the main bearing caps, steel crank and powdered metal construction con rods. Despite that almost worrying fact, they’ll rev to around 8,000rpm. For these reasons, they are being increasingly fitted in kit cars as a replacement for older engines.

Introduced in 1995, capacities available are from 1241cc fourth generation Fiesta, 1388, 1596cc and 1.7 litre Puma format. This engine also features variable valve timing but comes in two main formats – regular 1700 Puma with 125bhp at 6,300rpm and Racing Puma at 155bhp at 6,000rpm. The extra power is made in the tuned exhaust, different induction, cams and timing, plus a different chip in the ECU. You can get reasonable gains from a standard 1.7 litre engine (125bhp), certainly you can tune it close to Racing Puma spec firstly with a better flowing exhaust, a pair of Kent cams plus chip and air filter replacement/upgrades. This should give another 25bhp but more is available with head work.
The standard valves sizes can be retained for all stages of our CNC heads. A raise on the standard CR of 10:1 to 11.5:1 is beneficial for competition use, but at present forged pistons are only available to special build order until demand increases. Performance components are increasingly becoming available for the Zetec SE, including a full range of Kent Cams, adjustable cam pulleys, Omex and Alpha throttle body systems (due this year) and dry sump systems.

Caterham Power Train - In house tuned versions of Sigma.. see the "off the shelf Possibilities"

http://www.caterham.co.uk/assets/html/technical/development.html

PumaBuild - Racing Preparation work for Puma Rally cars.... again quoting the 155bhp and many engine components

http://pumabuild.co.uk/mods_frp.htm

The Sigma engine is going to be one of the MOST Tunable engines Morgan have used.... think Cosworth BDA replacement.

Hi cereal. thanks for the info, its given me something to think about anyway. Its another option to consider. I really like the 4/4 sport but was a bit concerned it might be too underpowered. A 150 hp sport sounds a bit different though. I always liked the 1600 x flow for its endless tuning variations, and the sigma certainly looks like its following in its foot steps.

I'm wrestling with buying a 4/4 sport having had a lot of other sports cars in the past six or seven years (911/Alfa SZ/Lancia Fulvia HF/Lancia Integrale/Vx220/Exige) and the grey was the main thing that made me consider the car. It just looks so right to me in a way that a red or yellow one simply doesn't. Perhaps its an age thing - I don't have the desire for retro because I don't remember it first time round LOL!

Andy