eric Posted February 3, 2003 Share Posted February 3, 2003 Same performances ? Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 3, 2003 Share Posted February 3, 2003 Not a chance. The R300 will have a much better power spread and is lighter. It should romp away. Link to comment Share on other sites More sharing options...
Anthony Posted February 3, 2003 Share Posted February 3, 2003 Suspect RKE figures are real horses - are the MG ones real as well ? Anthony VX the real way sideways Link to comment Share on other sites More sharing options...
Graham Sewell Posted February 3, 2003 Share Posted February 3, 2003 But put the RKE engine into a nice light live-axle car and the weight advantage (in a straight line) is negated. With a decnt 3D mapped ignition, the power spread should improve as well. Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 3, 2003 Share Posted February 3, 2003 It is very easy to get a 1.8 K on throttle bodies to make 160bhp. They are "for real" horses and they won't all be up at the top end. I have done normalised power comparisons between crossflows and Ks before and there is no comparison. RK is also keen to point out the benefits of 16 valve heads, if he turns up or if you ask him. Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 3, 2003 Share Posted February 3, 2003 You're wearing blinkers, Graham. You can stick a K in a live axle chassis and get double benefit. 3d ignition does not cure the fact that an 8 valve head cannot breathe as well as a 16 valve head. That means that to get the same headline peak power figure the crossflow has to run more radical cam profiles while the K-series can run modest cam profiles that give it an even power delivery. It is not even close. 30% more power to the K through the mid-range. I have answered the original question, based on fact. I won't feel a need to add further comment. Link to comment Share on other sites More sharing options...
JAG Posted February 3, 2003 Share Posted February 3, 2003 Graham & Anthony, how dare you question the opinion of the great and all seeing Peter Carmichael??????? He is the man who knows everything and isn't embarrassed to tell you so! Consider yourselves fully ticked off - based on the facts, I don't feel a need to add further comment 😬 😬 Link to comment Share on other sites More sharing options...
Jaseb Posted February 3, 2003 Share Posted February 3, 2003 At least a X-flow will sound better... 😳 Link to comment Share on other sites More sharing options...
Graham Perry Posted February 3, 2003 Share Posted February 3, 2003 Isn't the R300 actually an R350 ? If so, then as Peter says it wil romp away from all but the very best crossflows Link to comment Share on other sites More sharing options...
stevefoster Posted February 3, 2003 Share Posted February 3, 2003 Stick a VX XE in and at 175bhp you will beat them both (Assume Widetrack/Big brakes for all) Don't want a BC war on this one! It's just what I have observed during last year. My racing pics, 7 DIY, race prep. Updated often here Photo's of the year here Hants (North) and Berkshire Area club site here Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 3, 2003 Share Posted February 3, 2003 I agree that a 15 bhp advantage from a properly designed 16 valve head is going to offset the slight weight penalty, driveability (on carbs) and traction engine flywheel issues excepted. Have you raced against an R300 yet, Steve, or is this just a comment borne from the ability to embarrass R400s and SLRs? Link to comment Share on other sites More sharing options...
Graham Perry Posted February 3, 2003 Share Posted February 3, 2003 No doubt we will see at Curborough this year, as there is bound to be some R300's and plenty of Crossflows on soft rubber. 'Clash of the titans II' perhaps. Now if only we can get Barry H to turn up with his soft tyres on his crossflow Link to comment Share on other sites More sharing options...
Silver 21 Posted February 3, 2003 Share Posted February 3, 2003 Graham Don't tempt him to do that, I've seen his sticky tyres however I don't think they will fit his crossflow car as they are 7" fronts and 9" rears 😳 😬 Graham Competition Secretary Lydden, Curborough, MIRA, Llandow, Loton Park, Curborough, Aintree...What more can you ask for? Link to comment Share on other sites More sharing options...
Graham Perry Posted February 3, 2003 Share Posted February 3, 2003 Hoping to go to 7.5's at the back on mine in the next few weeks. Barry will be taking on R300's easily then, even though they will sit in a different class Link to comment Share on other sites More sharing options...
stevefoster Posted February 3, 2003 Share Posted February 3, 2003 Peter, Yep, Boggo 175 Caterham VX (not even LSD) against one SLR not quite fully race prepped was v close lap after lap until he spun right in front of me but then he should have had 190bhp! No chance against Merrick on fresher rubber and a full 190 or even 200 bhp and fully race prepped. He be long gone! Against lots of 155 RKE's and even a 180 odd all steel XF, I had the edge on power / grunt. This was all at grunty old Lydden though... My car was at about 515kgs inc fuel then. On carbs I didn't really have any driveability problems in the dry. Had to be carefull in the wet though! Flywheel comment accepted... I hope the regs will let me change it at the next convienient engine out.... I am going TB's and hope to get some more horses/driveability that way but still be in the standard engine internals class. Link to comment Share on other sites More sharing options...
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