Bally 4 Posted September 10, 2006 Presently building a 1900 8 valve, std bottom end, ported head, 3 angle valve job, twin 45mm carbs and longman extractor. which cam should I use? I have both. It will be a road car, Share this post Link to post Share on other sites
pug_ham 244 3 Cars Posted September 10, 2006 PT23 Race 3000 - 7800 12.49mm Inlet 12.24mm Exhaust 12.24mm Inlet 11.93mm Exhaust 304 296 Degrees 46/78 74/42 Full lift; 106 Degrees Valve clearances; 0.25mm Inlet 0.30mm Exhaust BP285P-Not recommended for use with std injection. Phenominal power when used with 2 x 45 dcoe's 2500-7000 284 deg 284 deg . Valve lift; inlet- 0.462" 11.73mm exhaust; 0.460" 11.68mm 106 deg Lift @ TDC; Inlet- 0.109" 2.77mm Exhaust- 0.107" 2.72mm Valve clearances; Inlet- 008" / .20mm Exhaust- .010" / .25mm I know of an engine that was almost the same spec as you suggest with the PT23 & that made 150bhp @ wheels on Dave Bloggs rollers which was a surprise to them. (I've got this engine now. ) Graham. Share this post Link to post Share on other sites
veloce200 3 Posted September 13, 2006 PT23 - it is only a "race cam" in 1.6 in a 1.9 it is classed as Supersports or Rally IIRC. as Pumaracing say they rarely measure up to the spec and the figures for duration are advertised not at .1mm or 1mm so they are comparable to a Catcam 279. so PT23 all the way. Share this post Link to post Share on other sites
