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> It's official, fuch the /4...... I'm doing a six, I'm nuts, JP wins
Mark Henry
post Nov 2 2009, 07:22 PM
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I did this in metric, so the inch figure is a conversion.

Lift at cam 6.85mm (.270)
total lift at valve 7.80mm (.312)
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Mark Henry
post Nov 2 2009, 09:00 PM
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How do I measure duration?
Measuring the start of the cam opening to close, it's about a 300* rotation on the crank. (rough guess with a VW bug degree pulley).
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J P Stein
post Nov 3 2009, 03:20 PM
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QUOTE(Mark Henry @ Nov 2 2009, 05:22 PM) *

I did this in metric, so the inch figure is a conversion.

Lift at cam 6.85mm (.270)
total lift at valve 7.80mm (.312)


I don't understand your numbers.
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Mark Henry
post Nov 3 2009, 06:20 PM
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QUOTE(J P Stein @ Nov 3 2009, 04:20 PM) *

QUOTE(Mark Henry @ Nov 2 2009, 05:22 PM) *

I did this in metric, so the inch figure is a conversion.

Lift at cam 6.85mm (.270)
total lift at valve 7.80mm (.312)


I don't understand your numbers.


I'll have to do it again, I borrowed a metric dial indcator, I've never used a metric one before, it seemed like a lot more lift than .312
(IMG:style_emoticons/default/confused24.gif)

Am I just measuring the total lift on the intake lobe of the cam? or both the exhaust and intake?

I'm a six newbie don't forget...got any pics?
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sixnotfour
post Nov 3 2009, 06:58 PM
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set #1 TDC
zero indicator #1 intake valve
roll engine untill #4 TDC at this point #1 will be at overlap.
take indicator reading.

lift at overlap is the factory version of dialing in the cam.
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sixnotfour
post Nov 3 2009, 06:58 PM
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set #1 TDC
zero indicator #1 intake valve
roll engine untill #4 TDC at this point #1 will be at overlap.
take indicator reading.

lift at overlap is the factory version of dialing in the cam.
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J P Stein
post Nov 3 2009, 08:06 PM
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Your cam lift makes a bit of sense when mulitplied by 1.5....rough rocker ratio.....giving .404 inches.....damn close to the E cam intake lift. But that .312..... (IMG:style_emoticons/default/confused24.gif)
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Mark Henry
post Nov 3 2009, 08:54 PM
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Fuch it, I need better instructions....doesn't help when you have no book and are dyslexic as shit.
Am i suppose to be reading the cam lift or the lift at the valve (retainer) which for me is easy as I have P-207 and the proper dial indicator.

"0" at #1 TDC with the indicator on the cam intake #1,
I get a negative number, -.15mm when on #4 TDC

Is there a "how to " on this anywhere?
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sixnotfour
post Nov 3 2009, 09:15 PM
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bacause your Not at TDC firing #1 when you start

QUOTE
Is there a "how to " on this anywhere?

ya the manual
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Mark Henry
post Nov 3 2009, 09:34 PM
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QUOTE(sixnotfour @ Nov 3 2009, 10:15 PM) *

bacause your Not at TDC firing #1 when you start

QUOTE
Is there a "how to " on this anywhere?

ya the manual


Great my factory manual only has the /4....guess I have to buy one to know the firing order (IMG:style_emoticons/default/rolleyes.gif)

I thought TDC was the same on all cars, intake closes , then compression and then TDC....# 4 looks like one full revolution to it's TDC...

Dizzy pointing to the little line for #1 and I know how to read the timing marks, the mark on the flywheel even looks spot on.....I guess I'm not doing it right
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sixnotfour
post Nov 3 2009, 09:42 PM
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(IMG:style_emoticons/default/beerchug.gif) (911 view ) "Front of Car" is the flywheel end.


Attached image(s)
Attached Image
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Mark Henry
post Nov 3 2009, 09:53 PM
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Ok I have that right....I didn't really need the firing order I can see it when I roll the engine...just pissed because I can't figure this out.
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SLITS
post Nov 3 2009, 09:59 PM
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If I can find the PDF of the manual, will PM the file to you.
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r_towle
post Nov 3 2009, 10:01 PM
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Should be 1432....and then 56
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ClayPerrine
post Nov 3 2009, 10:06 PM
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QUOTE(sixnotfour @ Nov 3 2009, 09:42 PM) *

(IMG:style_emoticons/default/beerchug.gif) (911 view ) "Front of Car" is the flywheel end.



Easy way to remember...

16 is too young.
24 is just right.
35 is too old.


(IMG:style_emoticons/default/biggrin.gif)
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jcd914
post Nov 3 2009, 10:07 PM
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QUOTE(Mark Henry @ Nov 3 2009, 06:54 PM) *

Fuch it, I need better instructions....doesn't help when you have no book and are dyslexic as shit.
Am i suppose to be reading the cam lift or the lift at the valve (retainer) which for me is easy as I have P-207 and the proper dial indicator.

"0" at #1 TDC with the indicator on the cam intake #1,
I get a negative number, -.15mm when on #4 TDC

Is there a "how to " on this anywhere?



This actually sound right to me, that is if by a negative number you mean the dial indicator has extended out as the intake valve moved down (opened).

You set it up on TDC #1 and zero'd the dial indicator on #1 intake valve.
You turned the crank 1 full turn to TDC #4 which is where #1 in in overlap, which mean both the intake valve and exhaust valve are partially open.
The measurement you got would be the cam timing that is currently set on you engine. I don't know how precise you were when you came up on TDC #4 but you need to be very careful and stop just as you reach the mark. You also need the valve adjusted carefully and the cam chain tensioned. This will not tell you which cam you have though just your cam timing.
Have you popped the chain cover off and checked to see if you can read the cam designation stamped on the end of the cam?
I don't recall all the designations but factory cams are stamped on the end by the sprocket and the numbers can be looked up. 6 digit number should start with 911.

Good luck.

Jim
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Mark Henry
post Nov 3 2009, 10:36 PM
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I can't get an accurate measurement off of the cam.

I have P-207 and off of the retainer (valve) I'm getting 3.61mm overlap

so 3.61mm divided by 1.5 is.....?

2.40mm ??
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J P Stein
post Nov 3 2009, 10:43 PM
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QUOTE(Mark Henry @ Nov 3 2009, 08:36 PM) *

I can't get an accurate measurement off of the cam.

I have P-207 and off of the retainer (valve) I'm getting 3.61mm overlap

so 3.61mm divided by 1.5 is.....?

2.40mm ??



3.6mm is your TDC overlap.....that's gud!! Now you go to Jeff's list of cams and see which cam is supposed to have 3.6mm of overlap.

#3.0 to 3.3 is damn close to E cam spec for timing, but not enough for Solex. The cam may advanced slightly, your methodology may be off a tocuch....make sure the indicitor shaft is square to the retainer. Roll it back to #1 TDC and your indicator should be 0. Do it a couple times more then check the other side ....#4.
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SLITS
post Nov 3 2009, 10:48 PM
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Be happy Mark. Is it possible that the numbers Jeff put up are measured as total lift and the rocker ratio doesn't apply.

We used your method ... dial indicator on retainer when setting the cams. The lift matched the specification listed in Wayne Dempsey's book.
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J P Stein
post Nov 3 2009, 10:56 PM
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QUOTE(SLITS @ Nov 3 2009, 08:48 PM) *

Be happy Mark. Is it possible that the numbers Jeff put up are measured as total lift and the rocker ratio doesn't apply.

We used your method ... dial indicator on retainer when setting the cams. The lift matched the specification listed in Wayne Dempsey's book.


They are total lift at the valve.
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