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 dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 31st, 2011 at 05:32 PM |
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Had to change the filter bracket too...
| Quote: | Originally
posted by westi
That's mad Alan.
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20bkombi
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| posted on January 31st, 2011 at 08:19 PM |
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| Quote: | Originally
posted by dangerous
For these:
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So how thick will the largest diameter be (o/d), and would that be in the centre across the length?
AARON'S SPEED SHIFT AUTOS
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 31st, 2011 at 08:30 PM |
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3/4" will be what they finish at.
Not sure yet whether they will be tapered from both ends to the middle
or just a short section each end.
This will depend on clearance within the push rod tube.
| 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 February 4th, 2011 at 09:39 PM |
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| Quote: | Originally
posted by westi
That's mad Alan.
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STOCK
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| posted on February 4th, 2011 at 09:45 PM |
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looking good dave
holy shit there's no way your bending thos push rods
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 matberry
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| posted on February 4th, 2011 at 09:50 PM |
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When do we see the 'finished' pushrod Dave??
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
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20bkombi
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| posted on February 4th, 2011 at 09:50 PM |
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Looking good Dave, are they about the same height as the old runners?
AARON'S SPEED SHIFT AUTOS
Specialising in Vw automatic transmissions, differentials and torque converters
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Ph 0402 233 027
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humpty
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| posted on February 4th, 2011 at 10:22 PM |
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The never ending battle to find more.................
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on February 5th, 2011 at 07:12 AM |
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Runners will be the same length as the old ones.
Pushrods will be finished when I get my valves and springs.
This way I can see where they will actually run, and finalize the length.(all before hardening)
| 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 February 10th, 2011 at 06:57 AM |
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Springs, retainers and collets arrived.
Also some cups to locate the bottom of the springs.
Retainers and collets are both Titanium.
Will have to machine out the spring seat and guide boss to fit them in.
| 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 February 10th, 2011 at 06:59 AM |
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That is a CB dual spring from some 044s above for comparison.
| Quote: | Originally
posted by westi
That's mad Alan.
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Stanley
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| posted on February 10th, 2011 at 08:03 AM |
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wholly crap they are some serious springs.
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vassy66T1
A.k.a.: Marcus Vass
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| posted on February 10th, 2011 at 08:12 AM |
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Looking good Dave.
Like the progress 
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humpty
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| posted on February 10th, 2011 at 09:18 AM |
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| Quote: | Originally
posted by Stanley
wholly crap they are some serious springs.
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X2!!!
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on February 10th, 2011 at 08:33 PM |
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Made this tool today to cut the spring seat and boss to size.
The outside diameter location:
The boss which i have stepped slightly so as to hold the spring tight at the base.
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on February 10th, 2011 at 08:36 PM |
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Began off setting the pushrod tube holes.
Will cut the chamfer tomorrow.
Will have to devise a new method to fit and test the springs.
These things use as much tension just to get the collets in,
than what I had before at full lift!
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on February 10th, 2011 at 08:39 PM |
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This is an old Big Block Chev valve that I lengthened to fit ,
just for my trial assemblies,
until my actual valves arrive.
| Quote: | Originally
posted by westi
That's mad Alan.
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STOCK
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| posted on February 10th, 2011 at 09:08 PM |
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looks awesome dave
you are a freak
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westi
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| posted on February 13th, 2011 at 06:06 AM |
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why not titanium push rod's.hey.
now that sounds like a plan.
as alway's dave great work.
can't wait to see the finall set up .
down sharon.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on February 13th, 2011 at 07:43 AM |
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Titanium is not a good pushrod material.
It is more suited to springs.
Some years ago a customer used some in a 1500cc speedway application,
and they survived fine, but were flexing about 1/2".
It lost so much timing
that a change to chomoly required a duration reduction on a new cam
of like 20 degrees to restore lost HP at lower rpm.
3M actually make an aluminium matrix material that is a possible candidate,
but these springs may even test those $1000 niceties.
| Quote: | Originally
posted by westi
That's mad Alan.
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matberry
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| posted on February 13th, 2011 at 08:27 AM |
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Wow Dave, who would think composite push rods could operate those HUGE valve springs. 
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on February 14th, 2011 at 02:57 PM |
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| Quote: | Originally
posted by matberry
Wow Dave, who would thing composite push rods could operate those HUGE valve springs.
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Actually, I am not so sure that they would.
But if any alum push rod had a chance,
these would be the ones to try.
http://solutions.3m.com/3MContentRetrievalAPI/BlobServlet?assetType=MMM_Image...
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on February 14th, 2011 at 02:59 PM |
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try again!
http://solutions.3m.com/3MContentRetrievalAPI/BlobServlet?assetType=MMM_Image...
no good,
just google 3m aluminium pushrods
| Quote: | Originally
posted by westi
That's mad Alan.
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Sides
A.k.a.: Dave Sidery
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| posted on February 14th, 2011 at 07:29 PM |
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Hmmm... interesting... ceramic fiber turning up everywhere !!!
But, I'll be the dodo that asks... do stiffer pushrods actually reduce valve float ???
I would've thought being stiffer would give more lift (due to less bend), and sort of "sharpen" the shape of the cam at full lift over a pushrod
that bends under pressure... which is almost the opposite of what their graph thing shows....
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on February 20th, 2011 at 08:09 AM |
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| Quote: | Originally
posted by Sides
Hmmm... interesting... ceramic fiber turning up everywhere !!!
But, I'll be the dodo that asks... do stiffer pushrods actually reduce valve float ???
I would've thought being stiffer would give more lift (due to less bend), and sort of "sharpen" the shape of the cam at full lift over a pushrod
that bends under pressure... which is almost the opposite of what their graph thing shows....
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Hi Dave,
it all comes down to terminology really.
If we call it"loss of valvetrain control", then yes,
a stiffer pushrod has less chance of inducing vibration
into the springs.
If it were a simple matter of the spring to keep everything tracking the cam lobe,
then heavier components would require more tension to do the job.
But there are so many other influences that make valvetrain control a constant battle.
Some times everything from a cam lobe profile, to a pushrod that is not quite right in its design,
can change things from one engine to another, even when all else is equal.
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on February 20th, 2011 at 08:13 AM |
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New valve guides for the inlet.
This is the second set.
The first set i made were a little short (in hind-sight).
Pushrods all drilled and roughed out:
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
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| posted on February 20th, 2011 at 08:15 AM |
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Pushrod peepers.
New tube seal plates.
Made from 7075:
These new tubes are made from buth tube, (32mm) and solid that is machined to size,(27mm)
| Quote: | Originally
posted by westi
That's mad Alan.
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dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
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| posted on February 20th, 2011 at 08:16 AM |
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Manifolds and ram tube adapters finished.
| Quote: | Originally
posted by westi
That's mad Alan.
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Stanley
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| posted on February 20th, 2011 at 02:17 PM |
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Lookin' good Davo.....how long till it makes some noise?
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nbturbo
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| posted on February 20th, 2011 at 03:16 PM |
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Dave, are you using anything special for seals on the pushrod tubes,or stretching OG ones to fit?
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