Cams And Pulleys

[daneldridge23 15]

hi guys

 

I put a post up in my build thread but have had no luck so I am going to try here!

 

 

I am about to fit my cams in the new motor, and i have a question

 

i have piper vernier pulleys and cams, one center is blue and one is black, is one exhaust and one for inlet.

 

the cams have two wood-ruff key slots, which one doe i use on which??

 

I haven't got photos to hand but could get some up if it would help?

 

Dan

[Miles 331 1 Cars]

Just look at the old one's to give you an idea, or if you don;t have them to hand, Dial them in as per the spec of the cam/s

[daneldridge23 15]

cheers miles i don't have the old ones anymore , the pullys i can understand , its just the two slots in the cams i cant get my head round? im sure ill figure it out!

 

dan

[petert 588]

Piper obviously use the same blanks that I use. When looking at the end of the cam, the slot that almost lines up with the lobes of cyl #4 is for inlet. The slot that is approx. 70º off the lobes is for exhaust. The same cam can be used for either inlet or exhaust depending on which slot you use.

[daneldridge23 15]

perfect! i can get them in tomorrow! do you think its worth me buying a degree wheel or print one off tinterweb and laminate it or something similar?

 

also i just put back in my buckets, and noticed that eight are quite soft to press down and lot are a lot stiffer? anything you can think of or should i get the recommended piper ones, or maybe you could help me out peter?

 

thanks for your help

dan

[petert 588]

You will definitely need a degree wheel and a dial indicator. I use the flywheel: http://www.taylor-eng.com/xu9j4/finding_tdc.html

 

The worst thing you could do is fit Piper buckets. Either reco your own or buy new XU10J4R/RS.

[daneldridge23 15]

why is that peter?

 

i have a dial indicator from when i checked the crank

 

i have found TDC and marked it on the engine pully, i made a nice pully for it, will this be ok or is the flywheel more accurate?

 

dan

[petert 588]

The mark is only as accurate as your ability to find it, as the piston has dwell at TDC. For example, did you go 10 deg. either side of your TDC mark and verify the piston drop is identical with the dial indicator? The flywheel is a lot more accurate as it's a larger diameter.

[daneldridge23 15]

yes i did its as good as i think i can get it, how hard is it to re-con my buckets and where can i get the parts?

 

dan

[petert 588]

No parts necessary, just degreaser and your labour: http://www.taylor-eng.com/16v_head/16v_head.htm

[daneldridge23 15]

cheers peter worked a treat, came apart nicely!

 

dan

[daneldridge23 15]

Peter when it says 1mm of pre load what does this mean, i have tried getting the air out, it either stays rele hard or squidgy, can you explain this for me? Also does the face of the lifter have to be smothed after dressing or is the finish as it is?

 

Dan

[petert 588]

You should be able to push the piston down 1mm. It shouldn't be rock hard. Use a needle etc., to let some oil out.

 

Leave the top of the bucket "as dressed".

[daneldridge23 15]

nice one thank you peter!

 

dan