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 dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on December 2nd, 2010 at 08:33 AM |
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Roughing out Exhaust Ports and Making Flanges
| 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 December 2nd, 2010 at 09:55 AM |
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Nice !!!
Great to see an update DB.
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humpty
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| posted on December 2nd, 2010 at 10:54 AM |
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OMG Dave!..... Don't fall in whilst your finishing them off!!!!
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Stanley
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| posted on December 2nd, 2010 at 12:16 PM |
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9 days til the 11th. Get them bolted on and out to Willowbank....
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dragvw2180
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| posted on December 2nd, 2010 at 01:04 PM |
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Wonderful work Dave , glad to see you were able to start back on your heads. What kind of increase in torque and HP do you expect from this
combination as compared to what you have now, or are these for the bigger combo with BERTHA ? Mike
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on December 5th, 2010 at 08:59 AM |
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Plan is for these to be fitted to the current engine.
I have some new JE pistons that I ordered from Summit,
so they will need notches.
Pushrods will also have to be made, and probably tubes as well.
I am aiming for mid tens,
so I am not sure how much more power i will need, perhaps another 25?
The comp ratio I want is in the 15 area,
and port cross sections and valves sizes are all to be reduced to try and increase the torque,
or atleast gie me a wider rev range of the same torque number.
| Quote: | Originally
posted by westi
That's mad Alan.
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dragvw2180
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| posted on December 6th, 2010 at 10:09 AM |
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I think I understand, higher compression and smaller ports will increase the speed of air mixture resulting in more torque. Are you going to use
titanium vales on these heads? If so you may also be able to drop spring pressures and reap a few lost HP there also. Thanks Dave I always like
following your posts and always learn something.
Mike
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humpty
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| posted on December 6th, 2010 at 05:06 PM |
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| Quote: | Originally
posted by dragvw2180
... Thanks Dave I always like following your posts and always learn something.
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Totally...
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on December 23rd, 2010 at 08:57 PM |
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Exhaust Ports are completed:
Here's what they started like:
Throating out the seat size:
Tilted the head slightly to favour the thick part of the casting/
The exhaust port was indexed at 9 degrees to match the valve guide angle.
| 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 December 23rd, 2010 at 09:01 PM |
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Inlet ports finished
Just need to make some valve guides, cut the seats and do the chambers and it will be time for he flow bench:
For reference, here's what they looked like at the begining:
| Quote: | Originally
posted by westi
That's mad Alan.
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reub
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| posted on December 23rd, 2010 at 09:25 PM |
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nothing like some volksporn - I think even 14yo boys would hae sore wrists over this stuff... hahaha - wonder where I read that
Reub
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 3rd, 2011 at 08:10 AM |
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Rough out Chambers
Made a tool with a 40 degree top cut angle, and radius for the seats.
I plunged down to a clean up point within the chamber, and then blended in the surrounding areas.
The inlet seat,(50 degrees) will be cut down onto this area,
and the 40 degree part will become the top cut for the seat.
The chamber around the inlet seat has a convex shape.
The area around the exhaust will have a concave shape
since it is still 45 degrees seat angle,
and I used the same tool to clean the chamber floor and seat.
It will eventually have a 35 degree top angle that will be blended into the surrounding chamber like the pictures.
| 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 3rd, 2011 at 08:11 AM |
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| Quote: | Originally
posted by westi
That's mad Alan.
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humpty
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| posted on January 3rd, 2011 at 11:32 AM |
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Dang those are some massive holes!!!!
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 5th, 2011 at 12:50 PM |
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| Quote: | Originally
posted by humpty
Dang those are some massive holes!!!!
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Actually, all the holes have been reduced in size when compared with my Pauter heads.
That being said, the valves are still 53.34 x 39.37mm.
| 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 5th, 2011 at 01:22 PM |
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Once i have the valves,
I can cut the seats and flycut the heads for compression.
How far I actually go will depend on the piston crown, and how deep the notches can be.
Would like to get 15:1 comp this time.
| Quote: | Originally
posted by westi
That's mad Alan.
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bat69
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| posted on January 5th, 2011 at 03:20 PM |
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I love those big 'holes' although there appears to be not much meat between those intake ports. It wont suck in gaskets will it?
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 5th, 2011 at 06:36 PM |
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No gaskets.
Loctite 515.
| Quote: | Originally
posted by westi
That's mad Alan.
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66deluxe
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| posted on January 6th, 2011 at 06:00 PM |
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Had a nice look at these the other day. Very nice.
This is my Volkswagen, there are many like it, but this one is mine. Without me my Volkswagen is useless, without my Volkswagen, I am useless.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 24th, 2011 at 08:51 PM |
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Deck height with new pistons.
Head will get a .015" step.
Checking piston to valve clearance.
Or should i say piston IN valve clearance?
first piston notch steps:
Old 12" lathe chuck and sleeve an pin that I used to hold the piston for notching.
| 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 24th, 2011 at 08:54 PM |
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Second cut, and tool to determine the point of minimum thickness.
| 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 24th, 2011 at 08:56 PM |
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Modifying the old exhaust.
Once I cut off the old flanges,
the 1 7/8 pipe fits snuggly into the new stubs.
| 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 24th, 2011 at 09:01 PM |
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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 24th, 2011 at 09:03 PM |
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This is a shot after I roughed out another 5mm for compression.
Total flycut so far is 7.75mm.
| Quote: | Originally
posted by westi
That's mad Alan.
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LIFE IN THE LOW LANE
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| posted on January 24th, 2011 at 09:43 PM |
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Looking good mate? Any estimates on HP increase and how much these will change your torque curve? Obviously top will be killer!!!
[size=4] ACCEPT THAT SOME DAYS YOU ARE THE PIDGEON AND SOME DAYS YOU ARE THE STATUE[/size]
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Stanley
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| posted on January 25th, 2011 at 07:14 AM |
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nice work Davo....someones been busy
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 25th, 2011 at 07:16 AM |
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| Quote: | Originally
posted by LIFE IN THE LOW LANE
Looking good mate? Any estimates on HP increase and how much these will change your torque curve? Obviously top will be killer!!!
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No Idea actually,
until I flow them, and sort out what compression I will have.
At this stage it looks like I will not even
acheive the same compression ratio that I have now.
The valve lift is .762 with soft springs,
and i have the valve notches as deep(nearly) as i dare.
As I suggested earlier,
the initial goal is to try for some 10.5's so this will equate to about 275 FW HP, or about 245 to the wheels
| Quote: | Originally
posted by westi
That's mad Alan.
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 matberry
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| posted on January 25th, 2011 at 08:08 AM |
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Nice work as usual Dave
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on January 31st, 2011 at 05:29 PM |
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Making room:
| 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 31st, 2011 at 05:31 PM |
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For these:
| Quote: | Originally
posted by westi
That's mad Alan.
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