Anything and everything GT6.

Hands up those on the group who have fitted TLD's roller rockers? Any feedback?
I am in process of doing so, just curious as to others experiance. Incidentally, current standard rocker assembly wear pattern indicates rocker tip not central on valve stem(closer to outside edge)- will have to investigate options to correct.
Regards
Bruce.

I have fitted a set of these and have currently completed about 5K miles, which included the occasional excursion towards 8K rpm. I haven't stripped them to check for wear (I'm trying to leave well enough alone). I bought mine as a kit and had to acquire the correct pedastals (the later Y shaped ends are correct) as I seemed to have early ones. I also had a problem with an adjuster thread. A couple of the rollers were a little bunged up with hardening salts and had to be released. I sent the complete kit back to TLD and he was very quick to sort out the issues, I can't fault the support given. There have apparently been some design improvements and supplier changes recently and the current kits are much improved (see Courier article from earlier in the year. One thing I did find was that Tony assembled the replacements for me, but when I came to fit them the pedastal spacing was wrong so I had to reconfigure it. It would appear that this spacing seems to vary somewhat across all the iterations of the 2000/2500/GT6/Vitesse heads. Not a big issue though.

I think the main limitation of these rockers is that it uses standard adjuster screws and locknuts running in the alloy rockers. The American kits seem to have some real quality adjusters (from the pictures) but the kits cost about twice as much. That said, the idea of the TLD kit is give ordinary mortals access to roller rockers at a reasonable price and I think it succeeds very well in this respect.

As I say, I haven't stripped them to check on wear, but the seem fine. I have fitted the extra oil line as recommended by TLD as I believe that lubrication was a problem with the standard design and even more important with roller rockers. Realistically, the development budgets for all these aftermarket upgrades are never going to be at Ford/GM/Toyota levels, so we have to be circumspect about potential lifespan.

As a general point, reproduction rocker shafts widely available from Triumph sources seem to be the biggest problem currently with many of them wearing out after very short periods. I believe that TLD has put a lot of time an effort into sourcing a his shafts.

Would I recommend them? Currently yes. But be careful not to strip those adjusters threads!

It has always been my belief that the rocker should be set up slight off-centre to the valve stem which has the effect of turning the valve. Perhaps one of the gurus would like to comment on this.

Thanks George, very informative.
Sadly, the rolling road man (Spam Speed) couldn't fit me in today. The idea being, take a power run bench mark setting today, then fit the roller rockers this weekend and take another power run next week as a comparison.
I would also be interested if anyone has got any substantive before and after power/torque figures for there cars when fitting similar?
Regards
Bruce.

Oops! slightly overdid it with picture size: sorry!!!

Care to correct it, Bruce?
You know it makes sense!
John

yet gor an ortosiyez on the piccie thing?

crayeg???

con yow sort owet th' black country dyalect?

mistry pryez to oooeva cumsoop with th'; fust corect translayshun

yower mayet

binmon, orlthowb probly not tet ower crayeg

owees th' corec inglish thin a gowen mayet? we'em still clayemen UDI from th' muthe tonge aranowend ear; ArrrPeee is wot we'em a dowen on th' way owem from the sucker on friday niyet after a belly full o' 'Olts Entyre, eny of yow aknowoen that...?

binmon

but nevertheless gor ortosiyez on the piccieding? crayeg con yow black country of type owet Th the dyalect? mistry pryez to oooeva cumsoop with Th; cask corect translayshun yower mayet binmon, orlthowb probly not tet ower crayeg owees Th corec inglish thin a gowen mayet? we'em clayemen still UDI of Th muthe tonge aranowend ear; Aknowoen ArrrPeee are weet we'em a dowen on Th ' manner owem of the embranchement on Friday niyet after an abdomen entirely o ' Olts Entyre, eny of yow that...? binmon

=

that to dutch and back to that

fer summeryow that mayeks now mower sense than thfustun ahbet

j

You can also just open the image in 'paint' and adjust the size from choosing the 'image' header and the 'stretch/skew'. choose the same percentage for horizontal and vertical. If you over estimate or under estimate, press 'ctrl+z' to undo, then try a different percentage.

The size of the image in Paint is what you will see when it's posted.

Everyone has the Paint program as it's part of the operating system, not an additional program.

to open an image in paint, right click on the unopened file while holding down the shift key, then choose 'open with' then choose paint.

once you've got the image to an apprpriate size, then you can 'save as' a jpeg and alter the name of the second image to imply it's a reduced size image.

You can also open a couple of paint windows and copy more than one picture to the 'canvas', then 'save as' and it will have the multiple pictures as one image, hence looking like you've posted more than one picture on one posting, like this:

I am also interested to hear any feedback on this as I have the kit on my shopping list.

Anyone have any comments about the Chris Witor version?

Regards,
J.

I say, Binman, that's a bit much, don't you know.
You'll have them thinking that the Aces are oiks.
Whereas we are all awfully nice chaps.

John

My understanding from when I was training as a mechanic in the 70's was that the rocker hits the valve stem slightlt off center so it turns the valve slightly each time it opens. It's the same with the cam followers (buckets) which are slightly off centre to the cam lobes for the same reason. Thats what I have understood all these years anyway. Mind you I also thought Worthington E was a grand brew and good value at 33p a pint!

Setting rockers for a performance engine is one of the most time consuming tasks. Everyone assumes you can just bolt them on and it's job done; not so. The wipe should be as near even as you can get it across the top of the valve stem. That is the wipe mark should be exactly centred on the stem otherwise excessive guide wear as well as stem and roller/tip wear will occur too. If you are using a high lift cam and high ratio you might find that even with careful modification of the post heights that the wipe is creeping over the edge of the valve stem (which can cause catastrophic failure) in which case valve stem caps should be used. These also increase the effective area of the top of the valve and can aid setting a centred wipe profile.

I shall check mine this weekend! I was informed to have the roller central front to back and slightly off-centre side to side. No I have read your post I will check the valve tips & rollers for wear. You are right (as usual) John that setting them up is time consuming, particularly the rocker shaft spacers, a case of multiple dry fit and check. As I indicated in my original response to this post, the distance between pedastals appears to vary form engine to engine. I collected a bunch of washers of various thicknesses from scrap standard rockershafts that enabled me to get close.

Thanks guys; great info, including the picture reduction stuff. Nearly had to run the wording through a translation website for the brummie bit though....
Regards
Bruce.

Section : Cylinder Head

Roller rockers

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