Alaskossie Posted March 9, 2009 Share Posted March 9, 2009 I wonder who will be the first to put a tuned Ford Duratec 2.5 in a Seven-type car? To re-cap, here are the bores and strokes of the three Duratec 4-cyl. variants: 2.0: 87.5 mm bore 83.1 mm stroke 2.3: 87.5 mm bore 94.0 mm stroke 2.5: 89.0 mm bore 100.0 mm stroke Or perhaps for a more sporting, higher-revving engine, mix the 83.1 mm stroke of the 2.0 with the 100 mm bore of the 2.5 block?? Maybe some tuners in UK are onto this already.....? I assume the 2.5 block is slightly taller physically than the 2.3 block, just as the 2.3 block is slightly taller than the 2.0..... Link to comment Share on other sites More sharing options...
scannon Posted March 9, 2009 Share Posted March 9, 2009 Do the larger versions have balance shafts? 2.5 liters is pretty large for a four banger without them. What car does the 2.5 engine normally reside in? Skip Link to comment Share on other sites More sharing options...
Boxologist Posted March 9, 2009 Share Posted March 9, 2009 Ammo hates the 2.3. as of early last year he found all his and other's builds to be limited to just shy of 300hp and were not reliable beyond 8000rpm, if that. he prefered limiting his work to 2.2L builds and thought 2.0 were the best balance of power and rpm range 9000+ was expected last time i checked. Link to comment Share on other sites More sharing options...
Alaskossie Posted March 9, 2009 Author Share Posted March 9, 2009 Skip, I believe all of the Duratecs 4-cyls. originally have the balance shaft. Tuners (including AMMO and Cosworth) remove them. The internal dry sump pump drive precludes keeping them in any event. So the stock 2.5 has a balance shaft, I'm sure. I don't know how smoothly it would run without it.... that's where mixing the short-stroke 2.0 crank with the larger bore of the 2.5 might be the way to go. The 2.5 is used in the 2010 Ford Fusion, Mercury Milan, and the 2009 Ford Escape. There are some Mazda models that may also use it. (Mazda uses a turbo 2.3 Duratec in the Mazdaspeed 3, with 263 hp. So it might be possible to turbo the 2.5 fairly easily; but getting all the plumbing into a Seven might be a problem). Just to confuse things, the new Ford Focus RS uses a turbo Ford Duratec 2.5 with 305 hp and 325 lb./ft. of torque -- but this is a FIVE-cylinder Duratec 2.5... (wonder if this engine will fit into a Seven....???). And just to confuse things further, there is apparently a Ford Duratec 2.5 in a V-6 engine (used in the Mondeo up through 2002, according to Wikipedia). Link to comment Share on other sites More sharing options...
Alaskossie Posted March 9, 2009 Author Share Posted March 9, 2009 Boxologist, Is Raceco's (Ammo's) 2.2 build made up of the 2.0 crank in the 2.3 block? If it is, then perhaps he could work with the 2.0 crank and the 2.5 block (if he hasn't already...). Wonder if that could break through the 300 hp barrier...? Link to comment Share on other sites More sharing options...
DB6 Posted March 9, 2009 Share Posted March 9, 2009 (edited) What is the constant tie to Ford engines and drivelines with Caterham when there are so many others that offer so much more hp proven reliability and availabilty of parts etc. for so much less money , is it size and fit, tradition, history, profits or what? I understand that it is a somewhat common engine in base form , but so are many others, and to be frank they have to be as good, if not better than being sheperded via the Ford-Caterham route. I can only guess that of all the engine options used and offerd by Caterham UK over the years that this is one of the few that is common for the UK market and still a viable option for them to offer in the USA as it is one they are familiar with. Edited March 9, 2009 by DB6 Link to comment Share on other sites More sharing options...
Hank Posted March 9, 2009 Share Posted March 9, 2009 Has anyone ever put a DSM 4g63 turbocharged 2.0 L engine in a Se7en? An adapter plate would be required for a RWD application, but it has been done before by Buschur Racing as well as many other drag racers. Link to comment Share on other sites More sharing options...
Boxologist Posted March 9, 2009 Share Posted March 9, 2009 Has anyone ever put a DSM 4g63 turbocharged 2.0 L engine in a Se7en? An adapter plate would be required for a RWD application, but it has been done before by Buschur Racing as well as many other drag racers. it would make Luc as electricals look reliable. http://i11.photobucket.com/albums/a189/mnewell/dsmcrankwalk3bd_2.jpg looking for an extended rpm range would worse for those blocks. The new 4 cylinder Mitsu block is already in service on the Hyundai Genesis couple in a turbo changed application. since its already been designed by the manufacturer for rwd applications, that may be a better and more cost effective engine if it fits under the bonnet. And teh Duretec is actually a Mazda design. Link to comment Share on other sites More sharing options...
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