2400 engine build

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Type 4 Unleashed
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Re: 2400 engine build

Post by Type 4 Unleashed » Sun Jun 17, 2018 1:57 pm

I, agree with Clatter on using something other than the CB VW650 springs, but not for the same reasons. This is to give you an idea of what to look for. Now, the 650 springs are designed for cams with valve lift from .600" to .630" and the 86b is only .500" lift, The 650 springs @ installed height are @ 160 psi, which is way to much pressure for the weight of such small valves, which actually robs power from the motor, but the over the nose pressure @ 500" lift wouldn't be to bad, basically the springs are not for that cam.

So what you should look for are springs designed for a .500" lift cam, Web has dbl spring good for a cam to .510 lift as an example, but there are others more reasonably priced CB has 1490 singles @ 1.500" are 120 lbs and @ .500'' their 220 pds but no coil bind specs, and the 1491 duals don't show any specs at all, and that's one thing that has always sucked about CB, they give very few specs about their products, and if you call them to inquire, they don't even know. I had called one time trying to find coil bind on a set of their springs I wanted to purchase, they had no idea.

So do your research before you buy anything else.
Richard

EMW

“Have you ever noticed how some people never
have the money to do it right, but can always
find the money to do it twice ?”

Eddie010
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Re: 2400 engine build

Post by Eddie010 » Mon Jun 18, 2018 2:20 am

Ray,
Thanks for the info on the spring... needed that.

Richard,
I thought I had gathered enough info, but seems I overlooked some stuff. (especially the max lift for the springs).
But thanks fot the help, now 2 persons said I have to rethink the springs, so will look into this.

This is great help... thank you guys.

Eddie010
Posts: 26
Joined: Sat Dec 19, 2009 4:27 am

Re: 2400 engine build

Post by Eddie010 » Mon Jun 18, 2018 2:26 am

Clatter,

Weighted the adjusters.

Original M10 adjuster:
Image

SwifelFeet adjuster M10
Image

Ok a bit surprised they weigh the same.
Oooh weight is in grams.

Eddie010
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Joined: Sat Dec 19, 2009 4:27 am

Re: 2400 engine build

Post by Eddie010 » Tue Jun 19, 2018 2:28 am

http://vwparts.aircooled.net/Beehives-D ... eet-ki.htm

Is this an option, I like that they are single and I don t have to cut the valve guide bosses.
Aircooled net, has printed the specs also… they are for lift up to .550.

Edit: the only thing I don t like about it is the use off keepers, I will have to shim the rockers than.
With probably interference with the stock valve cover.

Ps always had good results with ordering at aircooled.net

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Re: 2400 engine build

Post by Type 4 Unleashed » Tue Jun 19, 2018 3:20 am

You may not have to shim the rockers very much at all if you go with that setup. The additional installed height looks like it's in the retainer, and the lash caps and swivel feet adj's help clear the retainers. I had a set of Gene Berg retainers the same way, that I was able to set up @ about 1.850" with stock length valves. Rocker geo becomes more involved when you use valves over stock length.

But, you still might have to trim valve boss's some, I believe the Type lV boss's are larger than Type 1 boss's.
Richard

EMW

“Have you ever noticed how some people never
have the money to do it right, but can always
find the money to do it twice ?”

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Clatter
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Re: 2400 engine build

Post by Clatter » Wed Jun 20, 2018 2:06 pm

Correct; you do have to cut down the guide boss to the smaller type 1 size to run the beehives..
"Oh, You don't need to do all that... The valve seats are just going to fall out of it anyway!"
- Doug Ellsworth

Beginners' how-to Type 4 build thread ---> viewtopic.php?f=1&t=145853

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