Re: FR Head Cam Shimming Q\'s

Im on board with this post, same q's but didnt ask them yet...rock on.....

robert

I PM'ed you back man......

 

Re: FR Head Cam Shimming Q\'s

I PM'ed you back man......

Copy that.

 

Re: FR Head Cam Shimming Q\'s

First off these lifters (buckets) some people call them do not have shims but the range is like 17.115mm to 17.625mm so my suggestion is either take your lifters out of your stock head or order a small lifter just one and put it in meassure your clearances on each valve and do your math.

 

Re: FR Head Cam Shimming Q\'s

Ahh...so get a lifter that's within specs and i'm good...no shim needed?

 

Re: FR Head Cam Shimming Q\'s

So when do we plan to put your head on.

 

Re: FR Head Cam Shimming Q\'s

Okay, I just got through doing this very thing. The bucket range is 17.115 to 17.625 and that is in mm. Each size bucket goes up by .30 mm. So just at 30 to the last three numbers of the bucket sizes to figure out which size bucket you need to order. Also, each bucket increases in size by .003 (that's three thousandths for those keeping up at home) So here is an example of what you need to do.

Get 1 bucket (a small one) and place it in a valve on the FR head and put your cam in. Turn the cam so the heal (small end) is facing down. Get a feeler guage for measuring valves (it will have a 45 degree angle in it) and measure the gap. Lets say on valve 1 on the intake side you put a bucket in that was the size 17.115 and your gap was .025. According to the cam card of your particular cams you need a cold gap on the intake side of .012. So you need a BIGGER bucket to make that gap smaller. Well .025 - .012 = .013 difference between what you have for a gap and what you NEED for a gap. So now you take your bucket size of 17.115 (all you need to pay attention to is the 115) and ad 30, realizing that everytime you ad 30 you are going up in size by .003 and that will be your bucket size for that valve. In this case you would order a 17.235. 115 + 30(4) = 235. So you went up 4 sizes in your bucket. Since each bucket increases .003, you went up .012 to give you a gap of .013 which is fine.

Hope there isn't too much rambling in there....

Kev

 

Re: FR Head Cam Shimming Q\'s

How much $$$$ are the buckets from Ford? My old SHO used shims and you could flip 'em doring your 60k service if they still allowed for proper clearance.

 

Re: FR Head Cam Shimming Q\'s

So when do we plan to put your head on.

Well...as soon as I get the cams on dammit! Gonna make use of that heated and well lit space of yours.

 

Re: FR Head Cam Shimming Q\'s

Hope there isn't too much rambling in there....

Kev

Not at all....helps out a heck of a lot!

 

Re: FR Head Cam Shimming Q\'s

Okay, I just got through doing this very thing. The bucket range is 17.115 to 17.625 and that is in mm. Each size bucket goes up by .30 mm. So just at 30 to the last three numbers of the bucket sizes to figure out which size bucket you need to order. Also, each bucket increases in size by .003 (that's three thousandths for those keeping up at home) So here is an example of what you need to do.

Get 1 bucket (a small one) and place it in a valve on the FR head and put your cam in. Turn the cam so the heal (small end) is facing down. Get a feeler guage for measuring valves (it will have a 45 degree angle in it) and measure the gap. Lets say on valve 1 on the intake side you put a bucket in that was the size 17.115 and your gap was .025. According to the cam card of your particular cams you need a cold gap on the intake side of .012. So you need a BIGGER bucket to make that gap smaller. Well .025 - .012 = .013 difference between what you have for a gap and what you NEED for a gap. So now you take your bucket size of 17.115 (all you need to pay attention to is the 115) and ad 30, realizing that everytime you ad 30 you are going up in size by .003 and that will be your bucket size for that valve. In this case you would order a 17.235. 115 + 30(4) = 235. So you went up 4 sizes in your bucket. Since each bucket increases .003, you went up .012 to give you a gap of .013 which is fine.

Hope there isn't too much rambling in there....

this is totally not correct there partner .030 is not 3 thousandths because .025 is only 1 thousandths now the way you have to do your math is convert your thousandths in to mm by taking that 13 thousandths and x it by .025 which is .325 add that to the 17.115 which is 17.440 and pick the closest bucket to that 17.440 which i beleive is 17.445. good luck

 

Re: FR Head Cam Shimming Q\'s

How much $$$$ are the buckets from Ford? My old SHO used shims and you could flip 'em doring your 60k service if they still allowed for proper clearance.

Best price I've found is 5.34 each with free shipping. Local dealer wants 7-10 here

 

Re: FR Head Cam Shimming Q\'s

Just use your stock ones

 

Re: FR Head Cam Shimming Q\'s

Let's try to clarify this a little. If the tappets come in increments of .030mm then .030mm/25.4mm = 0.00118" or round up to 0.0012". If the measured clearance is 0.025"(.635mm) with a 17.115mm tappet and valve lash is to be 0.010"(.254mm), then 17.115mm + ((0.015"/0.0012") * .03mm) = 17.496mm where 17.115mm is the smallest available tappet, 0.015" is the difference between the measured lash and lash required, 0.0012 is the increment of the tappets in inches, and .03mm is the incerement of the tappets in mm. Pick the next larger tappet which would be 17.505mm. Always better to go looser than risk a burnt valve.

I hope this helps.

 

Re: FR Head Cam Shimming Q\'s

Always better to go looser than risk a burnt valve.

Good point. All of my clearances came out within 1 thousandth of the measured clearance according to the cam card - so I'm happy with that. I did my head exactly the way that I just posted and it all came out perfect - and I did all of that with Tom's guidance (thanks man). I'm not sure what cannon is saying is wrong and it really doesn't matter because I'm finally done with the head...thank jesus!!

Kev

 

Re: FR Head Cam Shimming Q\'s

Dammit...I got my shim for measuring in today. I told those terds 17.115, they sent a 17.175 instead...