Which sprocket keyway for 270 cam timing

nickm · Post by **nickm** » Sat Mar 03, 2007 12:26 pm

I am fitting a Piper 270 cam in my 3.9.The duplex timing chain sprocket has multiple keyways ranging from +6 to -6.Which position would be best?I will be fitting stage 3 heads and it is going in a Westfield seight.Thanks Nick

Post by **katanaman** » Sat Mar 03, 2007 12:35 pm

There is no answer to this, you need to time your cam to find out for yourself as it changes between engines. If you don't want to time it then put it in the middle key which should be zero and if nothing else safe. IMHO if you have spent the money on big valve heads then you really need to take the time and do it properly but that's up to you.

If you want a PDF that explains how to time a cam then drop me a pm with an email address to send it to.

nickm · Post by **nickm** » Sat Mar 03, 2007 1:14 pm

Thanks for that.Also could anyone tell me which way round the crank sprocket goes.Does the boss face the front or towards the block.Cheers Nick

adamnreeves · Post by **adamnreeves** » Sat Mar 03, 2007 3:32 pm

nickm wrote:Thanks for that.Also could anyone tell me which way round the crank sprocket goes.Does the boss face the front or towards the block.Cheers Nick

Didn't realize there was an orientation. Does this picture answer your question:

Higher res one here http://www.westfieldbuild.com/images/hi ... G_1545.JPG

nickm · Post by **nickm** » Sat Mar 03, 2007 4:26 pm

Worked it out using Haynes manual.The front end on your engine is different to my early 3.9.Thanks anyway Nick

Post by **katanaman** » Sat Mar 03, 2007 4:36 pm

stevieturbo · Post by **stevieturbo** » Sat Mar 03, 2007 5:01 pm

nickm wrote:Thanks for that.Also could anyone tell me which way round the crank sprocket goes.Does the boss face the front or towards the block.Cheers Nick

if its on the wrong way, you wont see the vernier or dot markings.

adamnreeves · Post by **adamnreeves** » Sat Mar 03, 2007 6:14 pm

A good point you mark, obvious really!

stevieturbo wrote:
nickm wrote:Thanks for that.Also could anyone tell me which way round the crank sprocket goes.Does the boss face the front or towards the block.Cheers Nick
if its on the wrong way, you wont see the vernier or dot markings.

nickm · Post by **nickm** » Sat Mar 03, 2007 9:36 pm

Thanks for the pm Marki.Will read through it properly tomorrow when I am sober .Nick

Blueman · Post by **Blueman** » Thu Mar 08, 2007 3:57 pm

Hi
I am to install a new cam on my V8. If you please would send a copy of the PDF that explains how to time a cam I would be very happy.

Post by **katanaman** » Thu Mar 08, 2007 4:06 pm

will do it when I get home

Post by **katanaman** » Thu Mar 08, 2007 11:39 pm