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Post by mccarefree on Jul 6, 2009 19:49:41 GMT
Ij37....Sorry it took a while to reply about rocker ratios. I didn't have the answer (too scientific for a mere mortal) but Keith Calver did. From an article on rockers:
"1.5 type .............. Use on full race small-bore only as extra lift/acceleration can out-strip available gas flow available causing power/torque loss."
Allegedly! But your experience disagrees, so the experts aren't always right! Cheers, M
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Post by Deleted on Jul 7, 2009 7:51:37 GMT
right i'm back, carver was doing it on a race set up, when fitting a performance cam the extended lift and duration is done for you fitting 1.5 gives you 20% more which can be to much on a 998, but on a std cam the extra 20% of fuel air mix is a benefit combine this with a needle change and dizzy curve change, something i have found while on 998 for all the work involve never had much luck with a pocket block, just starting on a 998 build now +60 md276sc aldon dizzy wedged crank, if the person who cant make there mind up wants i have some 1.5 rockers here which i could fit and they could try and then tell us if it's better, if you fit a performance cam tappets are set to 15 thou if you fit 1.5 would you set to 12thou or 15 thou on a std cam?
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Post by katentel on Jul 7, 2009 9:23:51 GMT
thanks everyone but kate has deceided to keep it as it is.however as i have now aquired another little addition all this info may come in really handy
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Post by Simon1275mpi on Jul 7, 2009 9:32:14 GMT
thanks everyone but kate has deceided to keep it as it is.however as i have now aquired another little addition all this info may come in really handy What ya got, what ya got? ;D |
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Post by katentel on Jul 7, 2009 16:51:24 GMT
h es another 998 mayfair on ay plate. got him last week but been too busy to have a real good look but appears to be pretty reasonable.obviously his name is VICTOR due to some banter which has now stuck.not that i dont have the odd moan. anyway im looking out for a good engine 1275 or so oh and hes dark blue with a nice set of gold alloys {which dont hold air for more than 4 days]
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Post by Deleted on Jul 7, 2009 18:50:53 GMT
i got a 1445cc if that's any good?
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Post by katentel on Jul 8, 2009 21:23:54 GMT
that sound interesting would i have to do any mods like braking what sort of dosh we talking about
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Post by Deleted on Jul 8, 2009 21:40:45 GMT
might be a bit to much for you keeps smashing gearboxes putting it on 4sync s/c and then selling to much torque
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Post by katentel on Jul 8, 2009 22:01:28 GMT
cheers anyway
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