Camshaft Timing

[e635815]

I have bought the camshaft kit from TVR parts for my Chimaera 500 but it comes without timing figures (http://tvr-parts.com/tvr-parts/part-details/tvr-e0440-kit/camshaft-kit-rover-v8-4.3,-4.5-and-5.0)
TVR-parts quoted me 111° ATDC for maximum lift.
Knowing how difficult it is to measured maximum lift, I was expecting getting other information, like opening angle at a certain lift etc...
Can someone point me to more detailed timing information?
Thanks a lot
Philippe

[blitzracing]

This is easy enough to do with a dial test indicator (you need to extend the shaft with a rod- I used a bike spoke) and protractor on the crankshaft pully- like this:

[e635815]

Thanks for the reply but I wasn't after a "How to Guide", rather after the timing values themselves.

[rev-erend]

When I did mine - I found the only accurate was to mark where max lift started and finished and take the mid point. Also the same idea with
setting what if TDC to set the pointer on the degree wheel.

Oh - don't skimp on the timing degree wheel. Get a big morosso one .. the bigger it is the more accurate it will be.

[LongBaz]

[e635815]

Thank you all for your replies and nice pictures but this is not what I am after.
I know how to time a camshaft.... I just want to know exact timing values for a standard 5,0 l camshaft...
Thanks
Philippe

[rev-erend]

They told you its 111 degrees.

What else do you need to know or don't you believe them.

[e635815]

First I wanted confirmation because the info can't be found on their website and they seemed hesitate on the phone. The collective knowledge of Pistonheaders would certainly have the answer to my question.
Second, measuring total lift isn't as easy as measuring a fixed lift value either side of the cam and calculating total lift position.
Was expecting this type of data.....

[e635815]

Got it...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Mr Jenks]

e635815 said:

First I wanted confirmation because the info can't be found on their website and they seemed hesitate on the phone. The collective knowledge of Pistonheaders would certainly have the answer to my question.
Second, measuring total lift isn't as easy as measuring a fixed lift value either side of the cam and calculating total lift position.
Was expecting this type of data.....

I ordered the same for my car, I found the info on the web site quite helpful

Timing 111.25 degrees ATDC Full Lift.

Measure max lift similar to finding TDC, set dti to zero, rotate cam past max lift and continue to zero, max lift is half way between the two readings on the timing wheel. full explanation here

Edited by Mr Jenks on Tuesday 17th November 22:21

[Pupp]

Erm, what if the grind is not symmetric...?

[e635815]

Mr Jenks said:

I ordered the same for my car, I found the info on the web site quite helpful

Timing 111.25 degrees ATDC Full Lift.

Edited by Mr Jenks on Tuesday 17th November 22:21

Now, this is something interesting.... TVR-parts had the same reaction: isn't the information avaialable on the website?

It is certainly there but obviously not easily retrievable.
Can you please point me to where did you find the camshaft timing on their website?
Thanks a lot.

[Mr Jenks]

e635815 said:

Now, this is something interesting.... TVR-parts had the same reaction: isn't the information avaialable on the website?

It is certainly there but obviously not easily retrievable.
Can you please point me to where did you find the camshaft timing on their website?
Thanks a lot.

No problem, http://tvr-parts.com/tvr-parts/part-details/tvr-e0...
Just select model, engine parts and pick the camshaft

[e635815]

Yep.... information is there at the individual part level but not for the kit..

[e635815]

Ok, now the camshaft is back in the engine... And I want to time it.... To 111 degrees ATDC.... But which cam should be set first?
I understand that everything has to be measured on cylinder 1, which is the first on the right hand side looking from the front of the engine, but which cam is set at this value? The intake or exhaust one?
If it is the exhaust, then it is the first cam on the shaft, if it is the intake, then it is the third cam on the shaft.
Am I correct or completely far off?
Thanks, Merry Christmas and Happy New-year.
Philippe

[carsy]

It's number 1. Inlet you use. See Blitzes picture above.

[e635815]

That's also what I thought.
Inlet for cylinder 1 means cam n°3 on the camshaft.
Intake cam lift reaches maximum 111° after top dead center... When piston speed is just after its maximum value...Need maximum flow area when max suction is available...Makes a lot of sens to me...
Back to garage.
Cheers

[phazed]

First lobe isn't it?

[e635815]

Nope, first lob is cylinder 1 exhaust.
Lob 2 is the opposite's cylinder exhaust.
Lob 3 is cylinder 1 intake.
Lob 4 is opposite's cylinder intake etc.....

[carsy]

Correct. Come on Peter keep up.