| [ Total Views: 322269 | Total Replies: 1582 | Thread Id: 58055 ] |
| Pages: 1 .. 14 15 16 17 18 .. 53 |
|
|
 westi
Custom Title Time!
what the
Posts: 1610
Threads: 28
Registered: August 30th, 2005
Member Is Offline
Location: milperra
Theme: UltimaBB Pro Blue
Mood: not blue, pink
|
| posted on June 10th, 2008 at 10:22 PM |
|
|
geez you have some work to do.
but i think your the write man for the job.
whats the difference between the two heads,main differences apart from looks.
down sharon.
 |
|
|
LIFE IN THE LOW LANE
A.k.a.: Brennden Alder
Son of Jim - Creator of Good
All people have the right to stupidity but some abuse the privilege
Posts: 2534
Threads: 53
Registered: March 11th, 2007
Member Is Offline
Location: Murrumba Downs - Brisbane
Theme: UltimaBB Pro Orange
Mood: What Kombi wants vs what Kombi gets are nowhere near the same...
|
| posted on June 10th, 2008 at 10:23 PM |
|
|
Noice Dave.
[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!!
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 11th, 2008 at 09:02 AM |
|
|
| Quote: | Originally
posted by westi
geez you have some work to do.
but i think your the write man for the job.
whats the difference between the two heads,main differences apart from looks.
|
Between these and the Pauter?
Primarilly the port size,
but the Pauter is much stronger in the rocker box support.
The Pauter comes rough CNC'd at the port flange,
and the holes are way big, exhaust too.
Also these have a different inlet approach angle
and the ports are better being closer together.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
westi
Custom Title Time!
what the
Posts: 1610
Threads: 28
Registered: August 30th, 2005
Member Is Offline
Location: milperra
Theme: UltimaBB Pro Blue
Mood: not blue, pink
|
| posted on June 11th, 2008 at 09:16 AM |
|
|
sweet thanks dave
down sharon.
|
|
|
mactaylor
Custom Title Time!
Posts: 1005
Threads: 54
Registered: August 14th, 2007
Member Is Offline
Location: Albury
Theme: UltimaBB Pro Blue
Mood: even my dog is german
|
| posted on June 11th, 2008 at 05:27 PM |
|
|
yeah thanks why the change other than the obvious?
EVERLAST CONCRETE TANKS
1800 552 123
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 12th, 2008 at 06:49 AM |
|
|
| Quote: | Originally
posted by mactaylor
yeah thanks why the change other than the obvious?
|
Nothing is obvious is it?!
Wanting to go faster?
My plan for the current heads was to fill in the ports with aluminium plates,
to try and increase the air speed,
but other than having the car in pieces for a while,
and it being a comprimised result unless I make a new manifold,
and the exhaust hole also being too big,
and the chamber needing more work,
and....
I clean slate just seemed like a better way to go.
I wanted these about a year or so ago so saved up my gold coins for a whole year.
Hopefully next year I can get the rockers and covers before Warwick 2009.
These will fit some old Autocraft inlet manifolds that I have,
and the exhaust will just be a flange change.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
 matberry
Super Moderator
Go hard or go home
Posts: 8114
Threads: 134
Registered: March 7th, 2006
Member Is Offline
Location: Cooroy Qld
Theme: UltimaBB Pro Blue
Mood: enjoying waving at all my Kombi buddies from my T3
|
| posted on June 12th, 2008 at 08:17 PM |
|
|
Go Volksie Go
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
 |
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 21st, 2008 at 06:31 PM |
|
|
Made and fitted some inlet seats today.
They have .007" interference fit.
Material is Aluminium Bronze,
which has a high tensile strength,
and expands at a rate close to the head material.
The heads are put in the oven at 200 degrees C,
and I use this mandrel to fit the seats:
All done!
Ready to rough out the inlet ports.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
matberry
Super Moderator
Go hard or go home
Posts: 8114
Threads: 134
Registered: March 7th, 2006
Member Is Offline
Location: Cooroy Qld
Theme: UltimaBB Pro Blue
Mood: enjoying waving at all my Kombi buddies from my T3
|
| posted on June 22nd, 2008 at 09:55 AM |
|
|
Looks good Dave.
Bet you love being able to do this at home these days.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
|
|
|
mactaylor
Custom Title Time!
Posts: 1005
Threads: 54
Registered: August 14th, 2007
Member Is Offline
Location: Albury
Theme: UltimaBB Pro Blue
Mood: even my dog is german
|
| posted on June 22nd, 2008 at 05:36 PM |
|
|
looken good dave,hope you dont make muffins at the same time as heating your heads, makes them taste funny! hope you dont mind me asking on youre
thread but want to know poundage valve springs i should put in my type 4 with 6mm valve stems and 7000rpm about a 280 deg @ 50 thou cam gotta order
some this week, thanks
EVERLAST CONCRETE TANKS
1800 552 123
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 22nd, 2008 at 07:45 PM |
|
|
Hi Mac,
it DOES depend on the profile, but if it is a stable profile,
and less than 600 lift I would aim to shim the springs about 80 to 100 from bind,
and use a quality dual spring in 1.25" Outside diameter.
Make sure you use a rev limiter to cover your arse.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 22nd, 2008 at 07:47 PM |
|
|
Current sponsors:
Engine with the short ram tubes.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
mactaylor
Custom Title Time!
Posts: 1005
Threads: 54
Registered: August 14th, 2007
Member Is Offline
Location: Albury
Theme: UltimaBB Pro Blue
Mood: even my dog is german
|
| posted on June 23rd, 2008 at 08:06 AM |
|
|
thanks dave just to confirm is that 80 - 100 pounds or 80 -100 thou from bind a standard type 4 spring is about 80 pound at 500 thou and about 30
pound at installed height. im putting in beehive springs just for fun see if it makes much difference, thanks again
EVERLAST CONCRETE TANKS
1800 552 123
|
|
|
matberry
Super Moderator
Go hard or go home
Posts: 8114
Threads: 134
Registered: March 7th, 2006
Member Is Offline
Location: Cooroy Qld
Theme: UltimaBB Pro Blue
Mood: enjoying waving at all my Kombi buddies from my T3
|
| posted on June 23rd, 2008 at 08:27 AM |
|
|
80 - 100 thou
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 23rd, 2008 at 09:09 AM |
|
|
Yeah Matt is right.
I used to have around 140 seat and 350 nose pressure.
Beehive may struggle with that, but with light valve it should be fine
as long as the cam profile is not a bogus one.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
mactaylor
Custom Title Time!
Posts: 1005
Threads: 54
Registered: August 14th, 2007
Member Is Offline
Location: Albury
Theme: UltimaBB Pro Blue
Mood: even my dog is german
|
| posted on June 23rd, 2008 at 06:15 PM |
|
|
yeah thanks hoping to get 100-330 somewhere round therewill see thanks both of you! how much does it cost to be a sponsor of the muffin man!!!!
EVERLAST CONCRETE TANKS
1800 552 123
|
|
|
westi
Custom Title Time!
what the
Posts: 1610
Threads: 28
Registered: August 30th, 2005
Member Is Offline
Location: milperra
Theme: UltimaBB Pro Blue
Mood: not blue, pink
|
| posted on June 26th, 2008 at 09:29 PM |
|
|
loverly work as always.
those heads rock.
dave what kind of differences in flow(cfm wise ) if any. does temperater make for the head flow benches.
and what kind of differences have you seen with venturi's.
pagey's got me thinking.we spoke the other night and i'm tinkering again.
down sharon.
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 27th, 2008 at 05:42 AM |
|
|
The superflow bench has a correction for the temp as it rises from the suction of the pump and where it blows out.
Higher temps have correction factors that reduce the inlet flow, and increase the exhaust.
Venturis in the carb or in the port near the seat?
The carb will most likely limit flow with a smaller venturi,
but larger vents may not let the carb work properly
(weber says 42mm is biggest for a 48IDA to get acceptable tuning through the range...bigger carb is different).
Have a look at some flow tests we did some years ago for interests sake:
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
westi
Custom Title Time!
what the
Posts: 1610
Threads: 28
Registered: August 30th, 2005
Member Is Offline
Location: milperra
Theme: UltimaBB Pro Blue
Mood: not blue, pink
|
| posted on June 27th, 2008 at 08:58 AM |
|
|
cheers
you can never have to much info.
down sharon.
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 27th, 2008 at 09:33 AM |
|
|
I'll try to find the correction number for each temperature.
For some reason the sf600 bench had no temp change factor.
Perhaps the temp difference was not present due to the electric motors being out of the air flow.
On the 110 bench the air got very hot at low lift/low flow.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
063bug
A.k.a.: Alan
Posts: -4
Threads: 0
Registered: February 25th, 2005
Member Is Offline
Theme: UltimaBB Streamlined2
Mood: just crusin'
|
| posted on June 28th, 2008 at 11:38 AM |
|
|
....love the Muffin Man stickers.....  |
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 28th, 2008 at 07:07 PM |
|
|
More Tinkering on the Heads
I needed to open up the exhaust seat hole.
So I made up some jigs to hold the head at a nine and a half degree angle.
These stepped spacers locate on the valve guide boss, and spring seat.
A pair of 10mm socket head cap screws go down and clamp the head down to the drill press table.
I did a bit of trial and error with some home made fly cutters.
The cutters locate on a dummy valve guide that taps lightly into the head.
In the end there are three steps.
The first cutter I made has a 2mm radius on the end, and a 30 degree angle.
The plan for this one is to give a good top angle to the valve seat.
Here is the home made cutter, and the finished hole showing the radius.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 28th, 2008 at 07:14 PM |
|
|
The other two steps are the seat hole its self,
and the inside of the seat hole so that the seat hole-cutter does not have to cut such a wide surface.
Here you can see how small the casting is in the throat.
The small hole was done with a guide boss cutter that I made in the early nineties,
for my first set of new heads and dual springs.
Once this was done,
I used larger cutter to make the actual seat hole.
The size is just larger than the proposed 39 to 40mm exhaust valve. (not sure yet)
I made this one 20 years ago to cut a hole in a stock head for a 40mm inlet valve.
But it worked great for this,
with just a light sharpen.
The tooth on the cutter is square,
it is just the angle of the pic that makes it look pointed.
It makes the seat hole flat on the bottom.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 28th, 2008 at 07:28 PM |
|
|
This is the finished recess, ready for a seat.
GREEN arrow is where the boss cutter opened out the throat.
BLUE arrow is the seat hole location.
RED arrow is the radius up to the chamber wall.
Yellow arrow is just short of the bore seal surface.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
13BVW
Seriously Crusin Dubber
Posts: 151
Threads: 6
Registered: September 11th, 2005
Member Is Offline
Location: Ipswich
Theme: UltimaBB Pro Black
Mood: always chilled
|
| posted on June 28th, 2008 at 08:28 PM |
|
|
Dave all this reminds me of "The worlds Fastest Indian"
13BVW 11.80@114mph
|
|
|
Dasdubber
A.k.a.: Alan Agyik
23 Windows of Awesome
DAS Resto Haus
Posts: 5746
Threads: 289
Registered: August 26th, 2002
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue
Mood: feeling fine...
|
| posted on June 28th, 2008 at 09:24 PM |
|
|
I can certainly see why good quality head work costs so much. I wonder how many hours you'll have invested in these heads by the time they are done
Dave?? Lots I am guessing!
Al
|
|
|
LIFE IN THE LOW LANE
A.k.a.: Brennden Alder
Son of Jim - Creator of Good
All people have the right to stupidity but some abuse the privilege
Posts: 2534
Threads: 53
Registered: March 11th, 2007
Member Is Offline
Location: Murrumba Downs - Brisbane
Theme: UltimaBB Pro Orange
Mood: What Kombi wants vs what Kombi gets are nowhere near the same...
|
| posted on June 29th, 2008 at 02:59 PM |
|
|
A fair few cups of coffee and a few muffins I'd expect....
[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!!
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 29th, 2008 at 05:27 PM |
|
|
Made up the Exhaust seats today:
...and shrunk them in:
Supoib.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
Stanley
Compulsive Aussie Vee Dubber
I guess the reward is in the doing of it
Posts: 4523
Threads: 270
Registered: March 13th, 2003
Member Is Offline
Location: Karalee...near Ipswich Qld
Theme: UltimaBB Psyche Grey
Mood: caught a bolt of lightning cursed the day I let it go
|
| posted on June 29th, 2008 at 05:38 PM |
|
|
Nice work Dave.
I can't wait for the die grinder to make an appearance
|
|
|
dangerous
A.k.a.: Dave Butler Muffin Man
23 Windows of Awesome
Posts: 5901
Threads: 178
Registered: January 6th, 2005
Member Is Offline
Location: Gold Coast
Theme: UltimaBB Pro Blue ( Default )
Mood: 591
|
| posted on June 30th, 2008 at 06:36 AM |
|
|
| Quote: | Originally
posted by Dasdubber
.I wonder how many hours you'll have invested in these heads by the time they are done Dave?? Lots I am guessing!
Al
|
This is the 5th pair of heads that I have done from scratch over my racing years.
My first set of 044 castings are still on Wally's "bugger" turbo drag beetle.
I did a set of super flow astings after that (first 10's),
then AF bugpack heads when I went up to 4"(101.6mm) bore in 1995,(got into the nines with those)
and then my current Pauter heads.
This time the train of thought will be totally new,
when planning out the port and chamber shapes,
being that the plan is purely normally aspirated.
I am up to about 15 hours so far.
It would take a lot less time with equipment and machines designed for head work.
And you can purchases valve seats and guides, but you know me,
I like to do everything myself if I can.
Only the final seat cutting will be farmed out
because I no longer work for someone that has the tooling.
My Pauter heads took about 40 hours of work to get ready,
and I would say that these will be about 50 to 60 hours,
being that the chambers and ports are castings,
whereas the Pauter had rough CNC holes and chambers to begin with.
This time guesstimate does not include the many hours
of looking at the heads and planning ideas
as I sit with them on the couch, in bed, and on the toilet,
rolling them over and dreaming about a plan of attack.
You can probably double the hours if you include that.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
| Pages: 1 .. 14 15 16 17 18 .. 53 |
