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 dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on May 10th, 2011 at 07:07 AM |
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yeah Friday OK, ring first, you know the drill!
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on May 10th, 2011 at 07:14 AM |
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| Quote: | Originally
posted by pete wood
They look awesome. 
Got 2 questions...
1. how much do they weigh compared to the usual hipo pushrod?
2. if they don't bend, what else will break?
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I just weighed some other pushrods for comparison.
Remembering that
mine are 350g,
stock is 39 grams,
Thin wall 3/8" cromoly 63g,
Thick wall 3/8" 85g,
Autocraft tapered 72g,
CB Manton tapered 107g.
So mine are over 3 times the weight,
thus the reason for the 1000lbs springs.
| Quote: | Originally
posted by westi
That's mad Alan.
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mactaylor
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| posted on May 10th, 2011 at 07:27 AM |
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any way of taking more weight out of them dave?
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HappyDaze
A.k.a.: Greg Mackie
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| posted on May 10th, 2011 at 07:45 AM |
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Did you weigh the pushrods FULL OF OIL? I tried it [many years ago], and was surprised at the results! Because of the weight of the oil, I pluggedthe holes in the [tapered chrome-moly] pushrods, and oiled the [needle roller] rockers before each race. The oil-surge on corners helped a bit, as it
was a circuit car. Never had a problem,
I'd rather wear a Beetle out by racing it than by polishing it!
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on May 10th, 2011 at 04:30 PM |
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| Quote: | Originally
posted by mactaylor
any way of taking more weight out of them dave?
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I am sure I can turn the large diameter down a little,
but for now I will see how they hold up,
and influence the rest of the valve train.
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on May 10th, 2011 at 04:32 PM |
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| Quote: | Originally
posted by HappyDaze
Did you weigh the pushrods FULL OF OIL? I tried it [many years ago], and was surprised at the results! Because of the weight of the oil, I pluggedthe holes in the [tapered chrome-moly] pushrods, and oiled the [needle roller] rockers before each race. The oil-surge on corners helped a bit, as it
was a circuit car. Never had a problem,
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I normall plug all the pushrods
and just have one exhaust with a 1mm restricter.
This is to supply oil to the valve springs for much needed cooling.(according to the spring manufacturers)
| Quote: | Originally
posted by westi
That's mad Alan.
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BeetleBug
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| posted on May 11th, 2011 at 09:53 PM |
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How do you plan to keep your heads where they should be with that spring pressure?
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ian.mezz
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| posted on May 12th, 2011 at 08:40 AM |
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yeah is it just me or do they look toooooo biggggg 
If a rocker breaks the push rods will shoot out like a small missile.
or the extra weight and load will loose HP 
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on May 12th, 2011 at 10:39 AM |
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| Quote: | Originally
posted by ian.mezz
yeah is it just me or do they look toooooo biggggg
If a rocker breaks the push rods will shoot out like a small missile.
or the extra weight and load will loose HP
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Yes that is correct.
Some times you have to sacrifice some things to get reliable goals.
Like money , you have to sacrifice some to make some more.
When I find an aluminium grade that can handle around 600lbs times the rocker ratio of 1.7(1020lbs),
I will be able to run a lighter spring,
and still run the lift(.750") and rpm that I need.
But for now,
these pushrods should handle the 1700lbs that the rocker will transfer back to the pushrod.
| Quote: | Originally
posted by westi
That's mad Alan.
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HappyDaze
A.k.a.: Greg Mackie
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| posted on May 12th, 2011 at 03:03 PM |
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| Quote: | Originally
posted by ian.mezz
yeah is it just me or do they look toooooo biggggg
If a rocker breaks the push rods will shoot out like a small missile.
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Hey, he's got a name to live up to
Dangerous, nothing to worry about, provided that your Public Liability insurance is adequate.
I'd rather wear a Beetle out by racing it than by polishing it!
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BeetleBug
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| posted on May 12th, 2011 at 04:54 PM |
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There are many ways to skin a cat and I believe 350 NA hp is possible with our engines with the right combination. Also without having to take the
engine apart after every run.
It will be interesting to see the end results.
Best rgs
BB
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mactaylor
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| posted on May 12th, 2011 at 06:05 PM |
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what about two piece pushrods double taper?
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BeetleBug
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| posted on May 12th, 2011 at 06:15 PM |
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Or what a about a cam design that makes the job easier? With a incorrect cam design you can use the strongest spring in the world... and still
experience problems.
For example: a comparison between Pauter vn011(left) Raptor (middle) and Shawn Geers' wildest grind (right) Which one will make the job easier you
think?
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cnfabo
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| posted on May 12th, 2011 at 08:24 PM |
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hhmmmm, middle?????
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66brm
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| posted on May 13th, 2011 at 05:09 PM |
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I'm guessin either geers or pauter, the ramps on the raptor look almost parallel, meaning high valve speed and potential for less control
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cnfabo
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| posted on May 13th, 2011 at 05:45 PM |
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| Quote: | Originally
posted by 66brm
I'm guessin either geers or pauter, the ramps on the raptor look almost parallel, meaning high valve speed and potential for less control
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andrew , you have not read much about johanes have you...start
searching...:
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Craig Torrens
A.k.a.: Craig Torrens
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| posted on May 13th, 2011 at 08:42 PM |
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| Quote: | Originally
posted by dangerous
| Quote: | Originally
posted by pete wood
They look awesome.
Got 2 questions...
1. how much do they weigh compared to the usual hipo pushrod?
2. if they don't bend, what else will break?
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I just weighed some other pushrods for comparison.
Remembering that
mine are 350g,
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Wow...my steak I had for dinner tonight weighs the same as your pushrod.......they certainly are 'meaty'
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BeetleBug
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| posted on May 13th, 2011 at 08:54 PM |
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All the cams was considered for a 2.9l NA street/race engine with MS230 heads that are slightly modified and flows 320cfm in 25" of water with
manifolds. Valves are 49.6mm (intake) and 38.6mm. The Raptor will utilize the full potential of the heads. At 8mm lift they flow 205hp, 10mm = 230hp,
12mm = 268hp. Less spring pressure = more power, less heat and more rpms. Sorry for bringing this excellent thread from the topic.
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pete wood
A.k.a.: figure itout
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| posted on May 13th, 2011 at 09:57 PM |
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^ drool.
Johanes, if I ever get to put together a serious ACVW motor, it will be full of your parts. 
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BeetleBug
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| posted on May 18th, 2011 at 04:09 PM |
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OBS OBS:
Please note that I`m not Johannes and I`m not involved in his company JPM (Johannes Persson Motorsport) in any way. I am however a firm believer in
what he is doing and making and I`m using his products in my own builds.
Best rgs
BB
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dragvw2180
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| posted on May 21st, 2011 at 03:53 AM |
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The JPM heads are a really nice update of the CE or Superflow heads and for the street I cannot think of a nicer head, but for what Dave is doing I
think he has superior heads. On his engine cooling is not an important factor so the cooling fins they added are not a benifit. Also I would question
the stiffness of the casting when bored out for the 101 mm cylinders and the compression , let alone adding 6 studs to them. In order to get the
airflow Dave is looking for would require alot of welding and reshaping of the ports also. After reading all the posts Dave has written and enjoying
them, I know he put alot of thought into everything he does. The only thing I am suprised about is that he has not built his own billet heads yet,
but these are close. Mike
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LIFE IN THE LOW LANE
A.k.a.: Brennden Alder
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| posted on May 21st, 2011 at 10:38 AM |
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Don't put naughty thoughts in his head lol
[size=4] ACCEPT THAT SOME DAYS YOU ARE THE PIDGEON AND SOME DAYS YOU ARE THE STATUE[/size]
Alder Outlaws VW Racing - check it out on fb!!
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reub
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| posted on May 21st, 2011 at 11:28 AM |
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HAPPY BIRTHDAY to DAVE
Reub
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Dak-A-Tak
A.k.a.: Peter Page
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| posted on May 21st, 2011 at 11:55 AM |
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Are Facebook , working on your heads will be a fine Birthday ( have good-one mate) . Doing a wally with that facebook pic of
yourself 
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humpty
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| posted on May 21st, 2011 at 01:34 PM |
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Hippo Birdee Big D...
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