| [ Total Views: 621 | Total Replies: 9 | Thread Id: 58704 ] |
|
|
 Tazz
A.k.a.: Tazz Devil
Custom Title Time!
Old Skool
Posts: 1315
Threads: 109
Registered: August 26th, 2002
Member Is Offline
Location: QLD
Theme: UltimaBB Pro Black
Mood: facisious
|
| posted on November 20th, 2006 at 03:13 PM |
|
|
Cam Selection ( found the death rattle)
Ok found the death rattle.
It seems the stock rivets let go and have rounded out the holes on the camshaft.
Time for upgrade!
I have been looking at eagle cams...
Adv. Duration 286° / Dur. @ .050" 248° / Lift @ cam .430" / Lift w/1.1:1 Rocker Arms .473
I would like some feed back on cam selection.
1916cc counterwieght crank, ported heads, 12lb flywheel,
balanced rods, std rockers and springs, twin 45 Del's, 009 with compufire ignition.
Also thinking Straight cut gears for the reduced excessive side load on the cam bearing thrust shoulder when using heavier valvesprings.
This is all goin into kermit so the extra resistance of all the fans straight off the front will reduce some performance.
Thanks
Tazz
1962 Type3 Squareback
1967 Type3 Fastback "Kermit"
The truth is important. It will set you free
|
|
|
56astro
Custom Title Time!
Posts: 1772
Threads: 74
Registered: August 25th, 2002
Member Is Offline
Location: The Nambucca
Theme: UltimaBB Pro Blue ( Default )
Mood: Pobjoy Powered with twin ignition & soon to be EFI'd
|
| posted on November 20th, 2006 at 03:16 PM |
|
|
Any details of the heads?
VW car, VW engine ...... keepin it "real"
35MPG on 101.3kPa |
|
|
Tazz
A.k.a.: Tazz Devil
Custom Title Time!
Old Skool
Posts: 1315
Threads: 109
Registered: August 26th, 2002
Member Is Offline
Location: QLD
Theme: UltimaBB Pro Black
Mood: facisious
|
| posted on November 20th, 2006 at 03:18 PM |
|
|
Large ports( almost D ports) and heavy valve springs... STD 1:1 rockers with ball feet.
Thats about all i know..
Tazz
1962 Type3 Squareback
1967 Type3 Fastback "Kermit"
The truth is important. It will set you free
|
|
|
xornge666x
Wolfsburg Wizard
Posts: 460
Threads: 15
Registered: September 17th, 2006
Member Is Offline
Location: Providence RI, USA / Melb OZ
Theme: UltimaBB Pro Blue ( Default )
Mood: agnostic
|
| posted on November 20th, 2006 at 03:21 PM |
|
|
wow, dont see that so often on a type 1 cam/gear! Seen plenty of type 4's do it.
Is that a stock cam that has been reground?
Is it a daily driver??
What comp are you running?
|
|
|
koolkarmakombi
Veteran Volks Folk
enkarmarising
Posts: 2078
Threads: 158
Registered: June 16th, 2003
Member Is Offline
Location: viva brisvegas
Theme: UltimaBB Pro Blue ( Default )
Mood: do you see the bats?
|
| posted on November 20th, 2006 at 03:50 PM |
|
|
Clutching at straws from afar, heavy springs could have helped it???
Have you considered ratio rockers at the same time ie match cam and valve gear? The ramps can be a bit aggressive on some cams and this can lead to a
shorter life.
Glad it was that death rattle and not something destructive nasty!
| Quote: | Originally
posted by Tazz
Large ports( almost D ports) and heavy valve springs... STD 1:1 rockers with ball feet.
Thats about all i know..
Tazz
|
This disclaimer does not reflect the thoughts or opinions of either myself, my company, my friends, or my dog: don't quote me on that; don't
quote me on anything; this disclaimer is subject to change without notice; text is slightly enlarged to show detail; resemblance to actual persons,
living or dead, is unintentional and coincidental; dry clean only; do not bend, fold, or mutilate; anchovies or jalapenos added to this disclaimer
upon request; your mileage may vary; no substitutions are allowed; for a limited time only while supplies last; offer void where prohibited; this
disclaimer is provided "as is" without any warranties expressed or implied
|
|
|
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 November 20th, 2006 at 05:27 PM |
|
|
That sounds like a pretty good choice depending on your driving style.
Other similar cams are Engle W110 and Scat C35.
These two have less lift on the lobe.
Your cam has alot of lobe lift. Perhaps a little less may be better, but I am unfamiliar with that particular grind.
Most New Hi Perf cams come with an aluminium bolt on gear and that should be ample with what you have.
But straight cuts do sound cool, but may become annoying on a long trip.
If you do buy straight cuts, get the best you can afford. I have seen the cheap ones shatter (cast)
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
hellbugged
A.k.a.: Daimo Pell
23 Windows of Awesome
48's and straight cuts
Posts: 5080
Threads: 116
Registered: April 17th, 2003
Member Is Offline
Location: Nambucca Valley NSW
Theme: UltimaBB Psyche Blue
Mood: Couldn't care less
|
| posted on November 20th, 2006 at 05:28 PM |
|
|
http://www.geneberg.com/cat.php?cPath=165_2773
|
|
|
Tazz
A.k.a.: Tazz Devil
Custom Title Time!
Old Skool
Posts: 1315
Threads: 109
Registered: August 26th, 2002
Member Is Offline
Location: QLD
Theme: UltimaBB Pro Black
Mood: facisious
|
| posted on November 20th, 2006 at 07:24 PM |
|
|
W-110 camshaft- .430 lift x 284 duration....
Eaglecamshaft- .430 lift x 286 duration....
Scat c35 .410 lift x 286 duration....
Very little difference between the three....
The only thing i was worried about the straight cuts was heat.... This is goin into type3 fastie....
Heat is a big problem.
Tazz
1962 Type3 Squareback
1967 Type3 Fastback "Kermit"
The truth is important. It will set you free
|
|
|
Tazz
A.k.a.: Tazz Devil
Custom Title Time!
Old Skool
Posts: 1315
Threads: 109
Registered: August 26th, 2002
Member Is Offline
Location: QLD
Theme: UltimaBB Pro Black
Mood: facisious
|
| posted on November 20th, 2006 at 07:28 PM |
|
|
| Quote: | Originally
posted by koolkarmakombi
Clutching at straws from afar, heavy springs could have helped it???
Have you considered ratio rockers at the same time ie match cam and valve gear? The ramps can be a bit aggressive on some cams and this can lead to a
shorter life.
Glad it was that death rattle and not something destructive nasty!
| Quote: | Originally
posted by Tazz
Large ports( almost D ports) and heavy valve springs... STD 1:1 rockers with ball feet.
Thats about all i know..
Tazz
|
|
From what i can gather its just a reground std cam... and with the force of snapping second and third the rivets just didnt hold... never designed to
hold that much preasure.
The heavy springs could have helped it along....
I'm just lucky they didnt let go..... bent valves and holy pistons....
Tazz
1962 Type3 Squareback
1967 Type3 Fastback "Kermit"
The truth is important. It will set you free
|
|
|
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 November 20th, 2006 at 11:01 PM |
|
|
| Quote: | Originally
posted by Tazz
W-110 camshaft- .430 lift x 284 duration....
Eaglecamshaft- .430 lift x 286 duration....
Scat c35 .410 lift x 286 duration....
Very little difference between the three....
The only thing i was worried about the straight cuts was heat.... This is goin into type3 fastie....
Heat is a big problem.
Tazz
|
The other cams that I suggested have similar timing figures but less lift at the valve.
The W110 has .431" at the valve with 1.1 rocker.
The eagle cam has a lot more.
The C35 I am not sure about its valve lift with 1.1 rockers, but it looks as though your info is valve lift for the Engle and Scat, and cam lift for
the Eagle.
Engine heat should have no effect ON, or FROM the cam or gear.
If your type 3 is running hot, you have tuning(fuel mixtures and ignition timing) or cooling system issues,
and possible compression ratio excesses.
| Quote: | Originally
posted by westi
That's mad Alan.
|
|
|
|
.JPG "Avatar")
