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 dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on June 27th, 2011 at 05:16 AM |
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| Quote: | Originally
posted by Sides
Looks like a pretty tidy setup DB - and thanks for the explanation.
Been reading up on the MSD 8 Plus a bit... good thing you fitted that alternator a while back hey !!!
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Yep it sure will need the alternator!
| 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 June 27th, 2011 at 08:06 AM |
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| Quote: | Originally
posted by westi
Hey Dave.
Do you think maybe the methanol may be taking up to much volume if it is placed all the way up the top. There fore maybe giving you less room for the
air to occupy for a good a/ f ratio.
What do you reakon.
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Yes good point Brad,
this is a problem with methanol period.
Not sure it will make much difference in 'space' whether it is injected either top or bottom,
unless it is injected direct into the chamber like the new Comodore engine.
The manifolds DO have a fair bit of cross section,
but there is always room to improve.
My theory with the better atomisation is just something I want to try,
and doubt very much it is the total answer, hence why I have other changes also in the works,
but if the fuel IS atomised better,
it will allow me to use less fuel per HP and thus more space for said air.
My primary reason for the top fuel entry is
to fatten up the power curve on the gear change.
I saw this occur last time I tried the nozzles up high,
but I am hoping this to be a better way to acheive the same result.
The top end normally benefits to if i can generate some controlled stand off.(it is my friend...or not?)
http://www.youtube.com/watch?v=fKyXwhom6P4
| Quote: | Originally
posted by westi
That's mad Alan.
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Craig Torrens
A.k.a.: Craig Torrens
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| posted on June 30th, 2011 at 09:03 PM |
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| Quote: | Originally
posted by dangerous
Engine survived the dyno, but a bit low on power.
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maybe the 100,000lb spings and the telegraph pole pushrods has taken some power ??! 
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on June 30th, 2011 at 09:13 PM |
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no doubt!
| 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 June 30th, 2011 at 09:17 PM |
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| Quote: | Originally
posted by westi
That's mad Alan.
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westi
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what the
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| posted on June 30th, 2011 at 10:11 PM |
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your f--kin nut's dude.
i love it.
r u going to ofset chuck and finish of the top's or r you trying something different for max lift.lol
down sharon.
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whathaveidone
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| posted on June 30th, 2011 at 10:47 PM |
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pffffff thats nothing!!!! I make my own cams all the time!!!!!!
Seroiusly though, What you do is awesome. Is there any tool you dont have?????? Cant wait to see it run!!
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Sides
A.k.a.: Dave Sidery
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| posted on July 1st, 2011 at 08:05 AM |
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Wow... just... wow...
VWDCQ vice pres & web dude - vwdcqinc.org.au
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20bkombi
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| posted on July 1st, 2011 at 10:02 AM |
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Wow... love your work man!!
How much thicker were you able to make the shaft?
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FROSTY
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| posted on July 1st, 2011 at 05:44 PM |
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How long..... did that take man??? That was a massive lump of metal to machine!!!!
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on July 1st, 2011 at 06:40 PM |
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9 hours!
| Quote: | Originally
posted by westi
That's mad Alan.
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Stanley
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| posted on July 1st, 2011 at 07:01 PM |
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that's impressive
you'll have to knock out a crank now to trump that
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LIFE IN THE LOW LANE
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| posted on July 1st, 2011 at 07:03 PM |
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with the duration on those lobes you could duck up stairs and make a coffe while they hold the valve open LOL
[size=4] ACCEPT THAT SOME DAYS YOU ARE THE PIDGEON AND SOME DAYS YOU ARE THE STATUE[/size]
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on July 1st, 2011 at 07:03 PM |
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already made two VW cranks(90 and 82,5mm), one Norton bike, and one Nash vintage car,
but another Volksy with about 94 stroke would be cool.
| Quote: | Originally
posted by westi
That's mad Alan.
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 matberry
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| posted on July 1st, 2011 at 10:35 PM |
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| Quote: | Originally
posted by Stanley
that's impressive
you'll have to knock out a crank now to trump that
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| Quote: | Originally
posted by dangerous
already made two VW cranks(90 and 82,5mm), one Norton bike, and one Nash vintage car,
but another Volksy with about 94 stroke would be cool.
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DB never ceases to amaze...... 
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Sides
A.k.a.: Dave Sidery
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| posted on July 2nd, 2011 at 05:16 AM |
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So dumb question time from me again DB... what's the finishing process from here on the cam... presumably polishing and/or hardening ???
And how do you avoid the incompatibility with followers problem that keep hearing about, or is that not such an issue with roller cams ???
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on July 2nd, 2011 at 07:39 AM |
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Hi Dave,
the next step will be for the lobes and journals to be pre-ground
to the desired shapes and sizes.
Crankshaft Engineering will do the journals on their crank grinder,
and Surecam will do the lobes to my desired specs.
It will then go off to be case hardened.
In the past I have asked for .060" deep case, but I may ask Surecam to give his recommendation.
After this it will go back to get the lobes and journals finished.
I made a flat tappet cam the same way some years ago,(currently in "Cranky2"),
and it was compatable with any of the induction hardened iron VW lifters(I used Mahle black ones).
In this case it will be able to be run on my current roller lifters no problem.
| Quote: | Originally
posted by westi
That's mad Alan.
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STOCK
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| posted on July 3rd, 2011 at 12:27 PM |
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dave you're a freak
STOCK |
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Sides
A.k.a.: Dave Sidery
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| posted on July 3rd, 2011 at 06:13 PM |
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| Quote: | Originally
posted by STOCK
dave you're a freak
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Heh heh - but he's a freak in that spreader of engine p0rn, taking a Volksy to it's limits, just plain "wow" kind of way.... which makes it OK in
my book !!!
Thanks heaps for explanation DB !!!
VWDCQ vice pres & web dude - vwdcqinc.org.au
Join a car club - get car peeps
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01 New Beetle - gf's car, but I turn the spanners |
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westi
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what the
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| posted on July 7th, 2011 at 10:41 PM |
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hey dave.
do you think this will be alright for the new heads.
280 50'
int 670atv
exh 654 atv
it's the same cam i have been running.
what kind off seat and nose pressures would you run.
and what kind of cfm difference should i be aiming for for another 30-40hp.
remembering my bench is 10'.
my old heads last time round were around 174cfm.
i am going to start on the same old bench so i can see ruffly were i start from and then move over to my new bench.whoo hoo.sf600.
down sharon.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on July 8th, 2011 at 05:27 AM |
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That cam is a little big on duration,but will work fine, especially you plan to run more than 8500rpm.
This all depends on your final head result however.
Remembering that a good cylinder head can extend the rev range, and poor will limit it, for the same valve action.
My bench is also only 10", but I think we found in the past that those figures don't match mine.
Either way, anything better than 150 is good, and above 175 is awesome at 10".
Your 174 equates to 275 cfm at 25", or 275 flywheel HP in my opinion.
Books and theorists say the potential is much higher than this,
but reality, and life, show that it is more common, to make HP less than the same 25" number.
I have always used the 25" conversion,( x 1.5811, as a HP number and it is pretty close to most real engine dynos).
30 to 40 HP more will need 30 to 40 more CFM at 25",
which means 19 to 25 more cfm at 10" I guess.
| 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 July 8th, 2011 at 05:30 AM |
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OH!
Without knowing if your roller cam profile is stable,
I would have to assume that it is, my own combo used 260 seat and 620 nose for reliable 8400 limit.
A soft profile could use as little as 500 over the nose in a perfect world.
Your rocker arms will have to be able to stand up to this though.
| Quote: | Originally
posted by westi
That's mad Alan.
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westi
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what the
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| posted on August 12th, 2011 at 12:25 AM |
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thanks for the info.
as for being stable f--k knows.how do you know if it's stable.
so as the post say's.
what dangerous been up to.
have you put in the big barstard yet.
down sharon.
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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on August 12th, 2011 at 05:25 AM |
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You can send the cam away and have its profile simulated, to find out if you combination of parts is stable.
One flat tappet I used in the olden days was sweet at 7600,
but only if it did not spit out the pushrod at 6200!(C45 with 1.6 rockers).
Another time, (at band camp) the lobes were found to be ground backward! (Autocraft).
Zero lash helps.
Still waiting on my new Surecam, but have a Pauter one to try.
It has less duration than yours though.
| Quote: | Originally
posted by westi
That's mad Alan.
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reub
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| posted on August 12th, 2011 at 08:30 AM |
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| Quote: | Another time, (at
band camp) the lobes were found to be ground backward! (Autocraft).
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...ah, so the lobes are purely for pleasure... not sure which band camp you went too
Reub
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westi
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what the
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| posted on August 12th, 2011 at 09:04 AM |
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were would i send it.
i haven't been to band camp yet.but i still love hearing the stories.
down sharon.
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LIFE IN THE LOW LANE
A.k.a.: Brennden Alder
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| posted on August 12th, 2011 at 02:02 PM |
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Might have to get Stock to buy a flute and learn to play it 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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dangerous
A.k.a.: Dave Butler Muffin Man
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| posted on September 15th, 2011 at 12:49 PM |
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Still waiting on my new cam, so fitted one that Don pauter did especially for me.
New MSD and injection made for a much nicer curve and a little more power.
Remembering that it ran 10.93@122 with 220hp and 1785 lbs of weight,
this should be worth a couple of mph and tenths too i hope.
The red humpy curve was last time, with small cam, 265*.
You can see how it has picked up from the 6500rpm and up (right where I use it).
| Quote: | Originally
posted by westi
That's mad Alan.
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STOCK
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| posted on September 15th, 2011 at 12:54 PM |
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thats awesome dave power curve looks great
STOCK |
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vassy66T1
A.k.a.: Marcus Vass
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| posted on September 15th, 2011 at 08:34 PM |
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Nice one!!
That power curve will translate into times no doubt
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