Club Cobra
Page 2 of 3 1 2 3
Show 20 post(s) from this thread on one page

Club Cobra (http://www.clubcobra.com/forums/)
-   FE TALK (http://www.clubcobra.com/forums/fe-talk/)
-   -   Valve lash questions (http://www.clubcobra.com/forums/fe-talk/103439-valve-lash-questions.html)

dcdoug 03-19-2010 02:33 PM
1 Attachment(s)
Yes, I have the cam card. Here it is:

patrickt 03-19-2010 03:21 PM
Quote:
Originally Posted by dcdoug (Post 1037013)
Yes, I have the cam card. Here it is:
Your overlap at .050 is 30 degrees (just add IVO and EVC). In contrast, my overlap at .050 is 17 degrees. Your other numbers are not really seat-to-seat, they're a little bit up from that, so you can't compare them to mine, but I'm pretty sure I remember the "B" cam to have 112 degrees overlap seat to seat.

EDIT -- of more interest, though, is the fact that your intake center line is 105 and your lobe separation angle is 106. Your builder probably installed the cam with the key in the 2 degree advanced slot and it measured out at 1 degree advanced. Now, let's see if ol' Chas can explain the math....

RodKnock 03-19-2010 03:47 PM
Quote:
Originally Posted by patrickt (Post 1037019)
EDIT -- of more interest, though, is the fact that your intake center line is 105 and your lobe separation angle is 106. Your builder probably installed the cam with the key in the 2 degree advanced slot and it measured out at 1 degree advanced. Now, let's see if ol' Chas can explain the math....
106-105 = 1? :eek: :o

dcdoug 03-19-2010 03:55 PM
I'm definitely a little confused, but hey, that's what being a rookie and learning about my FE is all about I guess.

A couple of other questions/clarifications:

-So I can use the method that Patrick described for lash adjustment, right?

-Any tricks for breaking the valve covers loose? I was going to first tap them a bit with a rubber mallet and then if i couldn't get them loose, to pry from the intake manifold side as gently as I can.

-When I reinstall with new gaskets, what's the recommended silicone sealer?

I appreciate the time and advice.

Doug

patrickt 03-19-2010 04:17 PM
Quote:
Originally Posted by RodKnock (Post 1037025)
106-105 = 1? :eek: :o
No, you must figure out the durations, the center lines, and the lobe separation angle by only using the exhaust numbers 48 and 14 along with the intake numbers 16 and 46. No fair using the LSA and ICL that I calculated for you.:cool:

RodKnock 03-19-2010 04:27 PM
Where's Rick Lake or Chas when you need them?

Way above my pay grade.

patrickt 03-19-2010 04:30 PM
Quote:
Originally Posted by RodKnock (Post 1037037)
Where's Rick Lake or Chas when you need them?

Way above my pay grade.
Could be that Chas misplaced his spectacles again. (And I'm tempted to post a pic of Mr. Magoo here.) More likely that ol' Chas is "mathematically challenged.":LOL:

dcdoug 03-19-2010 05:00 PM
While your waiting for Chas, any last comments on these:

A couple of other questions/clarifications:

-So I can use the method that Patrick described for lash adjustment, right?

-Any tricks for breaking the valve covers loose? I was going to first tap them a bit with a rubber mallet and then if i couldn't get them loose, to pry from the intake manifold side as gently as I can.

-When I reinstall with new gaskets, what's the recommended silicone sealer?

dcdoug 03-19-2010 05:04 PM
Quote:
Originally Posted by patrickt (Post 1037034)
No, you must figure out the durations, the center lines, and the lobe separation angle by only using the exhaust numbers 48 and 14 along with the intake numbers 16 and 46. No fair using the LSA and ICL that I calculated for you.:cool:
Heck, it's my cam card and I'm confused. %/ **)

patrickt 03-19-2010 05:43 PM
Quote:
Originally Posted by dcdoug (Post 1037045)
-So I can use the method that Patrick described for lash adjustment, right?
Right.

Quote:
Originally Posted by dcdoug (Post 1037045)
-Any tricks for breaking the valve covers loose? I was going to first tap them a bit with a rubber mallet and then if i couldn't get them loose, to pry from the intake manifold side as gently as I can.
They will come off pretty easy -- you won't have any trouble.

Quote:
Originally Posted by dcdoug (Post 1037045)
-When I reinstall with new gaskets, what's the recommended silicone sealer?
You can seal your gaskets to the valve covers with some goo (I use 3m Weatherstripping to stick my rubber gaskets to the valve covers only) but you don't use anything other than maybe a little grease between the gaskets and the heads. If they leak a little bit after you've lightly torqued them down (5 to 7 ft/lbs), then you can smear a little RTV along the bottom of the covers along the gaskets.

blykins 03-19-2010 06:04 PM
Easiest way to remember how to run the valves:

Set the intake when the exhaust valve is starting to open. Set the exhaust when the intake valve is starting to close.

Don't use the TDC method. It's not accurate.

Remember that if you set them cold, that the lash will increase when the motor heats up. If you're starting from scratch, set your cold lash about .006" lower than what you want it to be hot.

ERA Chas 03-19-2010 06:16 PM
Quote:
Originally Posted by patrickt (Post 1037040)
Could be that Chas misplaced his spectacles again. (And I'm tempted to post a pic of Mr. Magoo here.) More likely that ol' Chas is "mathematically challenged.":LOL:
First I'll deal with you Howdy then I'll help dc get his covers off. You are making another intellectual exercise out of a 450HP combination. :rolleyes:

The ICL of 105 is crank degrees. The LSA of 106 Is cam degrees which = 212 degrees of crank rotation. Thus-212-105=107. Installing the cam +2 (crank) degrees means the cam is 1(cam) degree advanced.

I left my Euclidean hat at the haberdasher-but I know that's some pu$$y cams you guys got. And dc is bleeding off a lot of cylinder pressure with 106 LSA-those valves are open a long time together-especially with .501 net lift. A 110 LSA would sharpen-up the bottom end, especially with stock med-risers. It must be noisy but doesn't breathe.

dc- use RightStuff on the cover to gasket and brown axle grease on the gasket to head. It will not leak. Use a 1" wide paint scraper or spackle knife to get between the goo you have now and the head to remove the covers. Clean all surfaces carefully.

Take your time and you'll enjoy the work. If stuck, you could always ask Karnak to explain the Pythagorean Theorem-AGAIN!**)**)**)

patrickt 03-19-2010 06:19 PM
Quote:
Originally Posted by ERA Chas (Post 1037059)
First I'll deal with you Howdy then I'll help dc get his covers off. You are making another intellectual exercise out of a 450HP combination. :rolleyes:

The ICL of 105 is crank degrees. The LSA of 106 Is cam degrees which = 212 degrees of crank rotation. Thus-212-105=107. Installing the cam +2 (crank) degrees means the cam is 1(cam) degree advanced.

I left my Euclidean hat at the haberdasher-but I know that's some pu$$y cams you guys got. And dc is bleeding off a lot of cylinder pressure with 106 LSA-those valves are open a long time together-especially with .501 net lift. A 110 LSA would sharpen-up the bottom end, especially with stock med-risers. It must be noisy but doesn't breathe.

dc- use RightStuff on the cover to gasket and brown axle grease on the gasket to head. It will not leak. Use a 1" wide paint scraper or spackle knife to get between the goo you have now and the head to remove the covers. Clean all surfaces carefully.

Take your time and you'll enjoy the work. If stuck, you could always ask Karnak to explain the Pythagorean Theorem-AGAIN!**)**)**)
Partial credit. For full credit, I was looking for this:

Exhaust Duration = 48+14+180 = 242

Exhaust Center Line = (242/2)-14 = 107

Intake Duration = 16+46+180 = 242

Intake Center Line = (242/2)-16 = 105

Lobe Separation Angle = (107+105)/2 = 106

blykins 03-19-2010 06:24 PM
Are you trying to make up for the pushrod ordeal Patrick?

patrickt 03-19-2010 06:30 PM
Quote:
Originally Posted by blykins (Post 1037064)
Are you trying to make up for the pushrod ordeal Patrick?
Well I did have to eat a healthy portion of crow with that little incident.:o

dcdoug 03-19-2010 07:26 PM
Thanks again guys. Appreciate the help from all of you, including Mr. Magoo and Karnak the Haberdasher. :D

ERA Chas 03-19-2010 07:28 PM
Quote:
Originally Posted by patrickt (Post 1037061)
Partial credit.
I accept that as your UNconditional apology for thinking I was the emperors clothes. I trust they'll be no further schoolboy attempts at cleverness.:MECOOL:

But Pat-SERIOUSLY---TO WHAT END???? You have made a sub-atomic examination of your basically 1 HP per CI 447 rebuild. Great. But instead wouldn't you rather get techno-nuts if you made-oh say- 1.3HP/CI? 581HP would be worth all the charts, graphs and equations and helpful to find even more power.

My cam is just starting where yours gets paralyzed. Wouldn't you rather run 11's than pore over data just to give rooks sermons?? Helping guys is great but not giving lessons and homework.

Cruising and waving to the adoring sheep is for losers. Then writing endlessly (10,400+ posts) about it is sad. Get out there and (try to) shred those Yokos!:o

blykins 03-19-2010 07:28 PM
Ah man, I want a fancy nickname now. :(

patrickt 03-19-2010 07:29 PM
Quote:
Originally Posted by dcdoug (Post 1037077)
Thanks again guys. Appreciate the help from all of you, including Mr. Magoo and Karnak the Haberdasher. :D
By the way, Magoo wants you to take him on a walking tour through Anacostia....;)

ERA Chas 03-19-2010 07:30 PM
Quote:
Originally Posted by blykins (Post 1037064)
Are you trying to make up for the pushrod ordeal Patrick?
Don't forget the hardware store clutch rod advice Brent.:LOL::LOL::LOL:


All times are GMT -7. The time now is 03:12 AM.
Page 2 of 3 1 2 3
Show 20 post(s) from this thread on one page

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: