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  #31  
Old 22-08-2017, 09:36 AM
pmac pmac is offline
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Do you machine the head in order to give a taller fitted height or is there another way of doing this?
Out of the box a Schneider spring is considerably taller than recommended. So I use two outer packer washers where Nissan only have one. To get it to 1.6" installed height and 110lbs pressure would need a custom packer making. We have done this where it was needed in the past but as already said on this mid range road engine it was not deemed neccessary.
As always on a build measuring and then making the appropriate decision is the way forward.
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  #32  
Old 22-08-2017, 09:50 AM
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johnymd johnymd is offline
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This is probably a real novice question but I'll ask anyway as I don't mind being laughed at. If the spring is too long, plus you use an additional packer, would this not increase the height and so the pressure?
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  #33  
Old 22-08-2017, 10:54 AM
pmac pmac is offline
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Originally Posted by johnymd View Post
This is probably a real novice question but I'll ask anyway as I don't mind being laughed at. If the spring is too long, plus you use an additional packer, would this not increase the height and so the pressure?
The spring cap is fixed.
If you add a packer at the bottom then that squeezes the spring up .
Installed height is less and pressure is increased.
Installed height refers to the spring only. installed length of spring is maybe a better word to use.

Im never going to laugh at anyone who genuinely wants to learn more.
Its what Tim, Steve n me are about.
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  #34  
Old 22-08-2017, 11:04 AM
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johnymd johnymd is offline
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Thanks Pete. Every day can be a school day.
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'73 240z 1JZ-GTE. Was pretty quick. 11.10@132.5mph
'72 240z RHD (4BOA) Painted and waiting assembly.
'72 240z LHD Silver "Rat look" daily runaround.
'76 280z ExLHD Red v8 Lexus powered restomod.
'74 260z LHD Restomod just started.
'71 240z LHD zg arched. Still in California.

Go to: www.240z.me.uk to checkout the cars.
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  #35  
Old 22-08-2017, 11:38 AM
pmac pmac is offline
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Originally Posted by johnymd View Post
Thanks Pete. Every day can be a school day.
Yep! There will be some school days here too as some or maybe all of us get to grips with K series 1.8 VVC engines

When this head is all built up and installed you are going to regret selling it even more







PS ..wanna buy the carbs back now I have made them a matching numbers set with "nice" new adjustable linkages???
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  #36  
Old 22-08-2017, 12:10 PM
Albrecht Albrecht is offline
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Originally Posted by pmac View Post
The spring cap is fixed.
...by the valve. Which could be anywhere, depending on what valve it is, what seat it is sitting in, where the spring collet grooves are on the valve, what spring collets are used and what head the whole lot is installed in.

"Them bones, them bones, them dry bones..."
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  #37  
Old 22-08-2017, 02:13 PM
pmac pmac is offline
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Originally Posted by Albrecht View Post
...by the valve. Which could be anywhere, depending on what valve it is, what seat it is sitting in, where the spring collet grooves are on the valve, what spring collets are used and what head the whole lot is installed in.

"Them bones, them bones, them dry bones..."
Yep agreed.
They need to be measured.
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  #38  
Old 23-08-2017, 10:33 PM
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Look at the wear/wipe pattern on this finger. This is what happens with a modified cam if you dont get the correct lash pad size. The wipe is way off centre and on this example might have been off the end of the rocker pad.
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  #39  
Old 23-08-2017, 10:39 PM
franky franky is offline
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What do you do Pete, order in the size you need or have stock ground to the needed size?
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  #40  
Old 23-08-2017, 11:51 PM
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Originally Posted by franky View Post
what do you do pete, order in the size you need or have stock ground to the needed size?
.....................

Quote:
ooooooh thats technical. No technical please
lets keep this thread on its "nice" theme
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  #41  
Old 24-08-2017, 12:03 AM
franky franky is offline
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Originally Posted by pmac View Post
Look at the wear/wipe pattern on this finger. This is what happens with a modified cam if you dont get the correct lash pad size. The wipe is way off centre and on this example might have been off the end of the rocker pad.
please see your last reply.
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  #42  
Old 24-08-2017, 06:20 PM
pmac pmac is offline
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So even the weather has been "nice" today.
I have installed all the valves and springs etc on this "nice" head.
I think I have made a "nice" job........
See how "nicely" the thicker lash pads sit in the Schneider spring caps.
Nothing to do till the new lash pads turn up from the lash pad fairy under my pillow soon.
The fingers are all waiting patiently. Lets hope they dont mix themselves up when Im not looking
So if you think its all looking "nice" then lets have friendly round of comments

Ill start it off .................. self praise etc not withstanding.
"Ohh that looks nice"

If you are lost for words then just copy n paste the above comment.
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  #43  
Old 24-08-2017, 07:12 PM
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smileyinside smileyinside is offline
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"Ohh that looks nice"!!!!
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  #44  
Old 24-08-2017, 07:27 PM
pmac pmac is offline
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Originally Posted by smileyinside View Post
"Ohh that looks nice"!!!!
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  #45  
Old 24-08-2017, 07:53 PM
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jonbills jonbills is offline
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Lovely. Even the pitting on the cam is nice.
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