springersrolla Posted July 31, 2016 Report Share Posted July 31, 2016 (edited) Gday, finally starting to get sorted and pulled my finger out. Have a 5k bored 40thou. All balanced and lightened. Running flattop pistons machined to 11.6:1 CR. Top end is ported with o/s valves and double valve springs. Have flowtest and info, flows intake 139cfm at 550". Intake is twin 40mm dcoe I have had a cam built and i dialed it in the other day and found it was a little out so had it checked and is 498" lift @305° duration. Now i understand this will be a sizeable cam but its only a sunday driver, cam builder is well known and has built it to suit all info. I'm going to put it in, but curious to see if anyone is running similar size and driving characteristics??? Been told its pretty well a drag cam.... Edited July 31, 2016 by springersrolla Quote Link to comment Share on other sites More sharing options...
Clapped out Posted July 31, 2016 Report Share Posted July 31, 2016 From my experience that's a normal cam for your application, if you search other cam grinders websites, they are all in the ball park with similar ground cams, cheers! Quote Link to comment Share on other sites More sharing options...
7000rpm Posted July 31, 2016 Report Share Posted July 31, 2016 What is the duration at .050? Quote Link to comment Share on other sites More sharing options...
springersrolla Posted July 31, 2016 Author Report Share Posted July 31, 2016 Intake dur @ 50" 252 ex @50" 240 Quote Link to comment Share on other sites More sharing options...
springersrolla Posted July 31, 2016 Author Report Share Posted July 31, 2016 (edited) Heres the sheet, still curious to driving characteristics Edited July 31, 2016 by springersrolla Quote Link to comment Share on other sites More sharing options...
7000rpm Posted July 31, 2016 Report Share Posted July 31, 2016 My old 5k had a 280 advert duration cam and with 10:1 comp, wasn't big enough for high rpm. I'm assuming you still have the hydraulic lifter gear? I like your setup. I would say the powerband might be 3500-7500/8000 rpm. Keen to see how you go? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.