That's a big Nope
Posted: Mon Apr 25, 2005 12:53 am
I am not interested in changing my powerband really, I can use it right where its at, I am keeping my stock head at 10,500 rpm though (on my speed ) but After timbo gets done with my head I am gonna crank up the rev to probably 12000 on my x440 - where I don't have to bang the limiter so much.
If you read the part where the buckets get hung up in their hole it makes perfect sense really.
I wish I had thought of it but I didnt . That is the reason for these low time valve pops in my opinion and I am not hearing anything else if it runs fine at one point and has the full rpm range your timing is good. If a valve hits a piston then there has to be a reason. The springs are weak stock ( or so I have read ) but that isn't enough if the buckets have too much resistance then you won't get the valve up fast enough with any spring , I know this is a stupid question but your last motor broke a valve right? ( mine did too ) what did you do to keep from reoccurring? Well the bucket may have played a part in that and disturbing the order it was in probably didn't cure the problem. I am very relieved for Timbo's post- maybe I am stupid and any dummie knew that about the buckets but I didnt , and now that I do I expect not to have any more problems with the valves breaking or floating provided I have kibblewhite springs or shimmed stock ones.
I think its pretty simple , we all know how everything else in our motor is how come some heads work fine and others have problems? This is my answer Springs and Buckets
If you read the part where the buckets get hung up in their hole it makes perfect sense really.
I wish I had thought of it but I didnt . That is the reason for these low time valve pops in my opinion and I am not hearing anything else if it runs fine at one point and has the full rpm range your timing is good. If a valve hits a piston then there has to be a reason. The springs are weak stock ( or so I have read ) but that isn't enough if the buckets have too much resistance then you won't get the valve up fast enough with any spring , I know this is a stupid question but your last motor broke a valve right? ( mine did too ) what did you do to keep from reoccurring? Well the bucket may have played a part in that and disturbing the order it was in probably didn't cure the problem. I am very relieved for Timbo's post- maybe I am stupid and any dummie knew that about the buckets but I didnt , and now that I do I expect not to have any more problems with the valves breaking or floating provided I have kibblewhite springs or shimmed stock ones.
I think its pretty simple , we all know how everything else in our motor is how come some heads work fine and others have problems? This is my answer Springs and Buckets