One of the benefits of roller lifters is that the cams can have sharper
ramps on them so the valves will spend more time, further open, for the same
duration. For this reason, the cams are specifically ground for roller
lifters.
James Nazarian
71 MGB Tourer
71 MGBGT V8
85 Dodge Ram
----- Original Message -----
From: "T. S. White" <tswrace@pacbell.net>
To: "JJJ" <m1garand@speakeasy.net>
Cc: <mgb-v8@autox.team.net>
Sent: Friday, November 07, 2003 11:54 AM
Subject: Re: Roller Lifters
> Hi JJ,
>
> I am not positive but I do not think you can use roller lifters on a
> mechanical or hydrualic cam. The problem is the profile of the lobes.
> I believe for rollers there has to be a specific lobe profile. I also
> think you must change springs for the rollers to work properly. Check
> this with a cam manufacturer or good engine machinist.
>
> I have had several roller cam engines built for racing and the
> adavantage is unquestionable. However, when I did this all the
> components were designed to work with roller lifters.
> --
> Best regards,
> Tom
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