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 dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 10th, 2006 at 07:49 PM |
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Heads Finished.
On a more positive note the heads have been lubed up, and assembled, and are ready to fit.
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| Quote: | Originally
posted by westi
That's mad Alan.
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shiftyvw
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| posted on January 10th, 2006 at 08:57 PM |
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just out of curiosity, do you have flow figures on those heads?
testing 1 2 3...
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 10th, 2006 at 09:02 PM |
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Yes, at what lift and pressure drop would you like?
| Quote: | Originally
posted by westi
That's mad Alan.
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shiftyvw
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| posted on January 11th, 2006 at 06:09 AM |
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how about 25in at a couple of points to 650? whatever figures you have, doesnt really matter, as long as they arent top secret!
testing 1 2 3...
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 11th, 2006 at 06:38 AM |
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Still looking, but heads on the car currently,
@.250" =172
@.500" =259
@.650" =285
@.750" =294 cfm @ 25"
| 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 January 11th, 2006 at 06:42 AM |
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I actually flowed them at 10" so these are converted figures.
My heads as pictured above flow less, but I havn't flowed them since I fly cut the crap
out of them for N/A use...but they were 10cfm@10" behind at .750".
This difference is not as great at lower lifts.
| 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 January 11th, 2006 at 06:46 AM |
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Found old figures...@.650 =272cfm@25"
@.750=279cfm@25" 0
| Quote: | Originally
posted by westi
That's mad Alan.
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shiftyvw
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| posted on January 11th, 2006 at 08:36 AM |
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cool, thanks. Higher than what i was expecting!
testing 1 2 3...
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 11th, 2006 at 09:31 PM |
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11/1/06...Heads and barrels on.
I am doing this assembly in my lunch time so not much progress...especially with all these head studs.
Barrels go on with the fitted piston, then circlips in and I use a grey silicone sealant under their base.
I like to fit the piston to the cylinder on the bench, before it goes on the engine.
I put never seize on the threads before the head goes on, because it is so messy.
Always use some type of lube on the threads.
I also quickly checked the conrod bolt tension (75ft-lbs in this case), before the bore kit was fitted.
[ Edited on 21-5-2006 by dangerous ]
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| 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 January 11th, 2006 at 09:36 PM |
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Special tools to tension head nuts
A few of the head nuts on these and other brands of head are inaccessable with normal sockets,
so these tools are made to get to the upper and lower nuts.
Studs that have 10mm threads are torqued to 25 lbs and the 12mm top corners are at 30lbs.
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| 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 January 11th, 2006 at 09:41 PM |
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These photos show the extra headstud that is under the rockers, which uses a VW 15mm sized spanner.
And the other 12point nut is in the rocker area and is a 1/2 inch socket size. It is a tight squeeze and requiresthe washer and socket to be
clearanced.
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| 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 January 11th, 2006 at 09:50 PM |
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With the heads tensioned down, I can double check that the pushrods and rockers on No1 are all as intended.
I set the tappets at zero by checking that the pushrod turns freely, and that I can feel no clearance.
This MUST be done when the engine is cold, and all the other rocker assemblies are on the engine
to even out load on the cam. This method can catch you out if the weather's temp changes, but usually
as soon as the engine warms up (steel based pushrods), the clearance re-appears.
At operating temp the clearance opens up to .016 to .020" !
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| 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 January 11th, 2006 at 09:56 PM |
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With the tappets set I rotated the engine over full lift and then watched through the inlet port
as the engine passed TDC on the overlap to see that indeed the inlet valve actually
passes below the top surface of the piston in the notch.
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| Quote: | Originally
posted by westi
That's mad Alan.
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Stanley
Compulsive Aussie Vee Dubber
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| posted on January 12th, 2006 at 06:21 AM |
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nice work Dave...keep the pics coming
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 12th, 2006 at 06:32 PM |
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12th Jan '06...some observations
Today at lunch I finished fitting the heads, and double checked the rocker and pushrod geometry.
The adjuster screw needs to be inline with the pushrod, when the valve is at half lift.
What I also noticed was that the heavy springs have (due to flex) taken alot of lift away.
The inlet had .710" with the soft springs, and now has .675" with the heavy ones.
Likewise, the exhaust is down to .605" from .625".
This is common with these springs, and the flex is in the pushrod, and (believe it!) those rocker arms.
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| 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 January 12th, 2006 at 06:53 PM |
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Here is the pushrod angle at full lift.
At zero lift this angle should be about the same, only the othe way.
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| 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 January 12th, 2006 at 06:56 PM |
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Also worth noting is that when I calculated the pushrod length, I had the adjuster screw only one turn from
under the rocker arm so that there was a minimum hanging out, but still had some adjustment.
| 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 January 13th, 2006 at 06:28 PM |
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13th Jan '06
Here is the engine head to head...it's no show-piece but I am a go-boy not a show-boy....yeah, should have
re-painted the cylinders!
Pushrod tubes are Pauter and use a water boxer seal at the case end and type one on the head end.
[ Edited on 13-1-2006 by dangerous ]
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| 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 January 13th, 2006 at 06:32 PM |
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The ugly patch welded into the lid was from the old blower days and is a war injury from
a pair Carrillo rods that came out...well, the top half of them anyhow.
| Quote: | Originally
posted by westi
That's mad Alan.
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DIY-DUB
Custom Title Time!
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| posted on January 13th, 2006 at 10:00 PM |
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it hurts just thinkin how much this would be costing you, looks great, thanks for the fast reply also, figured the time had something to do with
it
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 14th, 2006 at 04:02 PM |
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Sat 14th Jan '06
Today I fitted the pushrod tubes and reassembled the rockers and push rods.
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| 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 January 14th, 2006 at 04:07 PM |
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Front Cover
The front cover contains the dizzy drive ( the only Volksy part other than the headstuds),
and has to have that, and the pulley seal fitted before instalation.
There is also an 'O' ring at the main gallery where the full flow return would be.
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| 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 January 14th, 2006 at 04:18 PM |
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That Front Pulley!
Well actually, the pulley was cool, but the damn degree ring was a night mare.
After marking out TDC and BDC I went to fit the degree ring and found that it was not flat enough
for the sticky back to hold. I suppose I cant complain, it was pretty cheap from Bergs (oxymoron?!)
I ended up Arylditeing it on and used clamps that I had to keep moving around, lest they stick to the pulley too.
Anyhow, the thinners that was supposed to activate the sticky back was used to wipe all the excess glue off me, my tools, and the pulley.
Once the pulley was on, I tensioned it up to 150 ftlbs.
Looks pretty good, but not worth the 10hours and materials needed to do the job!
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| 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 January 14th, 2006 at 04:27 PM |
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So here is where I am at today.
Next week will have the rocker covers on, and then the
rest of the parts will be robbed off the engine that is in the car at the moment.
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| Quote: | Originally
posted by westi
That's mad Alan.
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2443TT
A.k.a.: Ian
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| posted on January 14th, 2006 at 10:18 PM |
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As Reub would say... HORN! That looks wild... I predict a new all motor record that will have the honda's crying no fair for years to come!
[ Edited on 14-1-2006 by iswinkels ]
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 16th, 2006 at 06:52 PM |
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Today I sealed up the rocker area with these massive rocker covers.
I also fitted a dunger dizzy to stop the drive winding out.
The flywheel is actually a modified 36 hp unit with the ring gear moved out a little
and some welding to form a location recess on the back.
The bolt pattern is a 3" pcd the same as most ford 6 and 8 cylinder engines.
I tensioned it down to 75 ftlbs.
[ Edited on 16-1-2006 by dangerous ]
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| Quote: | Originally
posted by westi
That's mad Alan.
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56astro
Custom Title Time!
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| posted on January 16th, 2006 at 07:23 PM |
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Ya better be wearing a harness, and carrying a torch when ya walk past those inlet ports
Very interesting thread, thanks
VW car, VW engine ...... keepin it "real"
35MPG on 101.3kPa |
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Doug Sweetman
Veteran Volks Folk
Nil Bastardo Carborundum
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| posted on January 17th, 2006 at 11:02 AM |
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lol... I love the fact that all these thousands of $$ and hundreds of hp are all transmitted through a (modified) 36hp flywheel love the irony...
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13BVW
Seriously Crusin Dubber
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| posted on January 18th, 2006 at 05:00 PM |
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:P im drooling good to see some people aren't afraid to show what they have
and how to do it !!!!
13BVW 11.80@114mph
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 18th, 2006 at 06:34 PM |
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Welcome to the forum Andrew.
| Quote: | Originally
posted by westi
That's mad Alan.
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