thanks all for your help, especially andrew, mark and terry. im under the impression that this isnt really a cam to suit what im after. within a week i will have twin 45mm webers, ive already got a ported head with bigger valves ready to go on too. now just need a lumpy arse cam. some say stage 5 cam is too much. but chris has one which is prolly equivilent in his car and says its still streetable. so i guess why not get something rediculous. not really fussed if theres no power under 3500-4000 and i know im prolly gonna get some hge fuel bill too. but would say a stage 4 be more practicle?
thanks again >From: andrew smith <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: [EMAIL PROTECTED] >Subject: Re: cam specs >Date: Wed, 20 Mar 2002 20:36:08 +0800 > >Ryan, >The cam you have is fairly mild as far as lumpy cams are concerned.The >figures >he has given you are advertised figures which means they are the opening >and >closing points for the valves.The duration at 50 thou opening is 216 deg >which >is what some cam grinders give for all there specs.The other durations he >has >given are opening and closing durations.Lets start with the inlet which >opens >at 26deg btdc and closes at 68deg abdc then add 180 deg which gives 274deg >duration.To work out the lobe centre line we halve 274 to get 137 which we >add >to the inlet opening of 26btdc which we really take off to get 111deg atdc >centre line(peak lift) for the inlet.We then do the same for the exhaust >which >opens at 70deg bbdc and close 26deg atdc then add 180deg to get 276 deg >duration.To get the centre line we take half of the duration(138) from 26 >atdc >to get 112deg btdc centre line for the exhaust.To work out the lobe >seperation >we then add together both the centre lines 111 and 112 to get 223 then half >that to get 111.5 deg lobe sep.All this info comes in handy when dialling >in >cams. Grape Ape Drag Racing have a look at this site for some cam info.Go >to >the camaro build up then valve train and then scroll down. >There also some good stuff under technical articles on the site directory. > >Ryan Ottens wrote: > > > hey list, > > i just bought a lumpy cam for $30 the other day. > > now i finally got the specs back of it today. > > but got no fricken idea on what most of them mean. > > all i know is the degree of the cam vaguely. > > this is what ive got > > > > timing - > > open: 7026 > > close: 2668 > > > > duration - > > Inlet: 274 (the degree of the cam?) > > Exhaust: 276 > > > > at 50thou 216 (wtf?) > > > > anyways this is what ive been told. > > could someone please say 'decifer' this language and tell me what it >means, > > and also like how lumpy is it etc etc. > > > > thanks again, > > ryan > > > > _________________________________________________________________ > > Send and receive Hotmail on your mobile device: http://mobile.msn.com > > > _________________________________________________________________ Chat with friends online, try MSN Messenger: http://messenger.msn.com --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
