Rocker arm question

For general chat, questions etc about cars designed by JP - the main forum
User avatar
Taff Striker
Posts: 84
Joined: Mon Jul 05, 2010 5:56 pm
Name: Richard Jones
Location: Wild West Wales

Re: Rocker arm question

Postby Taff Striker » Tue Sep 20, 2011 6:08 pm

Well things move fast down this neck of the woods :lol:
Decided to buy the roller rockers in the end and took delivery yesterday.
Sent them back today!
My fault really :roll: - my car's fitted with the escort upright and uses the Chevette ball joint bolted to the rocker arm, not the (later design) ball joint on the upright into a taper on the arm :oops:
Anyway, upshot is that Martin is going to work his magic on mine with some new bushes,pins and bolts 8-)

User avatar
dopdog
Posts: 934
Joined: Tue May 04, 2010 6:50 am
Name: Simon Boulter
Location: Oxfordshire

Re: Rocker arm question

Postby dopdog » Tue Oct 04, 2011 4:02 pm

I have a question for all on the roller rockers. Just received some today and got straight on fitting them, just to make sure i phoned raw and spoke to martin on how they should be fitted. while speaking to him i mentioned that all of the circlips that hold the rollers and washer in the end of the rockers were off and the spindle moved back and forward :? . Not an issue put the circlips on and fitted the rockers. the last step was to fit the shocks. I had measured the distance and had the new rockers in the same place for the correct caster position, as soon as the load from the shocks being mounted the front circlips pinged off the both rocker moved forward :evil: NOT happy.

will be phoning raw and asking for a new pair but am a bit disappointed as it seems that all of the braking load is on these circlips???

last one i also noticed that there was a little movement sideways on the spindle as well.

any advice or info would be great.

PS cannot go back to the old rockers as the new rocker spindles are bigger and as such had to drill out the mounting holes in the chassis.

User avatar
timhoverd
Posts: 28
Joined: Thu Jul 09, 2009 3:13 pm
Name: Tim Hoverd
Location: Cambridge, UK
Contact:

Re: Rocker arm question

Postby timhoverd » Tue Oct 04, 2011 4:55 pm

dopdog wrote:I have a question for all on the roller rockers.


My Fury, now sold, I modified for use with rollers. However, I was planning, before I sold it, to move back to some sort of bush. The reason is that I think rollers are the wrong sort of bearing for this application. The shafts are not moving very much at all as the suspension really doesn't move that far. Consequently, there's a large radial load on just one or two rollers and they tend to dig into the housing.

To disagree with myself. Tony Southgate, in his recently published autobiography which actually has a picture of JP in it as well as a photo of Tony's Phoenix, talks about using roller bearings on the Le Mans cars he designed.

dopdog wrote:will be phoning raw and asking for a new pair but am a bit disappointed as it seems that all of the braking load is on these circlips???


I looked into this too a while ago. In summary, I wouldn't worry. The axial load that a single circlip can take is surprisingly large. Anyway, isn't it arranged so that one bearing is leaning on the housing under braking and the other one on acceleration?

Tim
Il semble que la perfection soit atteinte non quand il n'y a plus rien à ajouter, mais quand il n'y a plus rien à retrancher.

User avatar
dopdog
Posts: 934
Joined: Tue May 04, 2010 6:50 am
Name: Simon Boulter
Location: Oxfordshire

Re: Rocker arm question

Postby dopdog » Tue Oct 04, 2011 8:10 pm

Hi Tim
thanks for the comments, spoke to martin who is going to have a look at them for me, will see :D

User avatar
dopdog
Posts: 934
Joined: Tue May 04, 2010 6:50 am
Name: Simon Boulter
Location: Oxfordshire

Re: Rocker arm question

Postby dopdog » Wed Oct 19, 2011 8:14 pm

All sorted and ready, so have booked the car into procomp to have all the ins and out bits sorted. turned out i had the wrong curclips on the rollers. will let you know how i get on at procomp.


Return to “Jeremy Philips Cars”

Who is online

Users browsing this forum: No registered users and 17 guests