[Fot] Peugeot lifters 504

[Ted Schumacher]

Not sure about lifter bore angle on wet liner engines, but Spit/TR6 
variants were on a 4.5 degree angle. Ted

On 11/17/2017 7:49 AM, Jerry Van Vlack via Fot wrote:
> The discussion on lifters is of interest to me. I’d like to see some 
> independent  verification of the recent statement regarding lifter 
> bore being at some angle relative to the cam bore.
> What I believe is the bores are perpendicular to the cam bore but 
> offset from lobe centerline to facilitate lifter rotation. I recently 
> did some research on cams and lifters for the wet sleeve engines and 
> have concluded that factory stock cams and lifters are ground flat and 
> lifter bores are offset to facilitate lifter rotation. My bases for 
> the conclusion is via verification at a cam grinder that the stock 
> lobes (and my Kastner D cam) are ground flat by installing several OE 
> cams between centers in the cam grinders equipment and sweeping a dial 
> indicator across the lobes and the heals which verified dead flat grind.
> With regard to lifters I took several used but known to be OE lifters 
> that were in good shape and placed them end to end, there was no 
> rocking and they mated as though they were lapped together. I did the 
> same with new lifters from a well know supplier and placed them end to 
> end and they rocked showing a slight radius. These radiused lifters 
> combined with a flat cam are not matched for lifter rotation and can 
> lead to rapid cam and lifter wear. If using a cam that has a taper 
> ground lobe with the radiused lifters you will get rotation.
> I have no idea what effect on wear an offset lifter bore has with a 
> tapered lobe cam and radiused lifter. Maybe someone else can comment 
> on that.
> Perhaps this is old news to many racers but I suspect that some 
> engines have been built with mismatched cams and lifters that led to 
> rapid cam and lifter wear which was wrongly blamed on oil and break-in 
> procedures.
> JVV
> *From:* Mike Harmuth via Fot
> *Sent:* Thursday, November 16, 2017 8:47 AM
> *To:* FoTTriumph
> *Subject:* Re: [Fot] Peugot lifters 504
> "And they've been used in at least one 1296 Spitfire engine, where 
> they're much larger in diameter than stock."
>
> Now you have my interest, I have a small block 1296 block with worn 
> lifter bores and my engine builder couldn't find a slightly larger 
> lifter. I'm guessing he didn't look at a Peugeot parts catalog. Does 
> anyone have a lifter part number or a spec so I can investigate 
> bringing this block back from the dead? It was mentioned that the TR 
> bores holes are not parallel to the block, are the small journal 1296 
> bore the same?
>
> thanks
> mike h
>
>
>
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-- 
Ted Schumacher
tedtsimx at bright.net
http://www.tsimportedautomotive.com
108 S. Jefferson St.
Pandora, Ohio, USA 45877
Fax: 419.384.3272 (24 Hrs.)
Phone: 800.543.6648 (US & Canada)
Tech/ Gen. Information/ Worldwide: 419.384.3022

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