Jeff S Posted February 12, 2008 Share Posted February 12, 2008 What is the difference between my 1800 140 X power and a supersport engine producing similar horsepower? Am I right in thinking that the combination of ecu, cams and pistons are matched to give the optimum torque and horsepower but at lower revs. Ignoring the fact that at higher revs the pistons might fail...would the cams be ok being run with a supersport ecu? Jeff Link to comment Share on other sites More sharing options...
neil.cavanagh Posted February 12, 2008 Share Posted February 12, 2008 add injectors into the combination... and x-power are EU3 where as I think the super sport are all Eu2, which means the ECUs aren't plug compatible. Link to comment Share on other sites More sharing options...
henry21p Posted February 12, 2008 Share Posted February 12, 2008 "branding" was the difference? the MG X-power rolled back in the developments from Lotus/Caterham etc which were sold as supersport? Link to comment Share on other sites More sharing options...
Grubbster Posted February 12, 2008 Share Posted February 12, 2008 My understanding - X-Power are EU3 (not EU2) so different ECU, cams, injectors (and possibly more). The original Supersport probably generates a little more power than the X Power (even though both are claimed to be 140 - I believe X-Powers are a little below this) It's only taken four and a half years - I have started my website at last! Early days yet . . . Link to comment Share on other sites More sharing options...
oilyhands Posted February 12, 2008 Share Posted February 12, 2008 The X-power engines have TF135 cams which are much more mild than the SS cams, they have a 52mm TB on a VVC plenum which is not matched to the head (and leaves a 4mm step) and revised ECU calibration. The cams are the same profile as the VVC exhaust cam Stock cam 248 degrees 8.8mm lift X-power cam 252 degrees 9.3mm lift SS cams 266 degrees, 9.5mm lift These engines are rated at 135BHP in the MGF and I think that is proably optimistic. I fancy some matching of the plenum and a decent set of cams would give you a verifiable 140BHP. The rest of the engine spec. is box stock. Oily Edited by - oilyhands on 12 Feb 2008 12:08:08 Link to comment Share on other sites More sharing options...
Jeff S Posted February 12, 2008 Author Share Posted February 12, 2008 Thanks all, Oily,YHM from this morning but sent before I had a chance to read your post Therefore, YHM again! Jeff Link to comment Share on other sites More sharing options...
Mr Happy Posted February 12, 2008 Share Posted February 12, 2008 whats going on here Link to comment Share on other sites More sharing options...
Mark Durrant Posted February 12, 2008 Share Posted February 12, 2008 Jeff I can confirm that it is within the regs to make the mods as suggested by Oily especially as you have a significant power to weight diusadvantage when compared to the rest of class 3 😬 Mark D Comp Sec Link to comment Share on other sites More sharing options...
Englishmaninwales Posted February 12, 2008 Share Posted February 12, 2008 VVC plenum which is not matched to the head (and leaves a 4mm step) Does the matching involve removing metal from inlet track, cylinder head or both? (Jeff, don't forget the L7C class 2/3 sprint regs for 1800 ❗) Malcolm Edited to add that I must type faster, and the Boss has passed judgement Edited by - Englishmaninwales on 12 Feb 2008 13:10:55 Link to comment Share on other sites More sharing options...
oilyhands Posted February 12, 2008 Share Posted February 12, 2008 Matching the plenum requires port mods since the ports are a great deal smaller than the plenum, alternatively the plenum could be welded a little to close down the manifold face. Fitting of the plenum is a parts bin exercise with no thought to the mis matching. Oily Link to comment Share on other sites More sharing options...
mav Posted February 12, 2008 Share Posted February 12, 2008 Just to clarify early EU3 engines are in fact designated Supersport - I have a 1.6ss but could have ordered a 1.8ss. The X-power branding emerged in early 2003 I think... Link to comment Share on other sites More sharing options...
Englishmaninwales Posted February 12, 2008 Share Posted February 12, 2008 Matching the plenum requires port mods and I can confirm that it is within the regs to make the mods as suggested by Oily Hmmm...... Link to comment Share on other sites More sharing options...
Jeff S Posted February 12, 2008 Author Share Posted February 12, 2008 TM. As mark so kindly pointed out 😬 I am purely investigating my options to correct the ever increasing wieght disadvantage that I have. Indeed, if things carry on the way they are, the engine may not be the only part upgraded... an SV chassis could be next 😳 And it has nothing to do with beer 😬 😬 😬 Back on track, Just had a look at the plenum and oily is right it just doesnt match the head ports...food for thought. (No pun intended) Mav, Point taken, wouldnt dream of it 😬 Jeff Link to comment Share on other sites More sharing options...
Jeff S Posted February 12, 2008 Author Share Posted February 12, 2008 Malcolm, Behave 😬 😬 Jeff Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted February 12, 2008 Share Posted February 12, 2008 The X-power branding emerged in early 2003 I think... My October 2002 model is badged X-Power if that's any help. 7 related photos Link to comment Share on other sites More sharing options...
Mark Durrant Posted February 12, 2008 Share Posted February 12, 2008 Jeff Malcolm is correct in that you cannot modify the head and I must say that I was looking for TM to point this out not the paddocks resident Chav 😬 Mark D Comp Sec Link to comment Share on other sites More sharing options...
Englishmaninwales Posted February 12, 2008 Share Posted February 12, 2008 oi, jus coz i've gotta chavvy motor, at least i still get me grammer roight, innit? [:o (paddock's) Speedy 205 GTIs rule ok Link to comment Share on other sites More sharing options...
mav Posted February 12, 2008 Share Posted February 12, 2008 Mav, Point taken, wouldnt dream of it 😬 Eh? 😬 Link to comment Share on other sites More sharing options...
Mr Happy Posted February 12, 2008 Share Posted February 12, 2008 So is Jeff going to class 4? TM Link to comment Share on other sites More sharing options...
Adrian Williams Posted February 12, 2008 Share Posted February 12, 2008 You need to check out your location TM, you're a bit behind the times. Adrian Looking out for a nice R500 Link to comment Share on other sites More sharing options...
Jeff S Posted February 13, 2008 Author Share Posted February 13, 2008 Mav, Sorry, it was aimed at malcolm's post reminding me of the regs... its my age you know... Jeff Link to comment Share on other sites More sharing options...
Dannyboy Posted February 14, 2008 Share Posted February 14, 2008 Jeff....no need to cheat 😬 I'll make sure that I'm still driving like miss daisy! 😬 😬 plus...I will carry spanners and sockets to remove your plenum for checking compliance Dannyboy Link to comment Share on other sites More sharing options...
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