As far as I'm aware, roller rockers only come in 1.55 and 1.65 ratios.
Since these are both higher ratio than stock (which I believe was
around 1.46), there should be slight increase in power (due to higher
lift) when insalling roller rockers. Plus, the reduction in friction
should also theoretically increase power a bit. But the main gain will
be felt when adding a performance cam in conjunction with the roller
rockers.
Tim Holbrook
1971 TR6
--- James Franks <jimmble@adelphia.net> wrote:
> From: "James Franks" <jimmble@adelphia.net>
> To: "michael lunsford" <mblunsfordsr@yahoo.com>
> CC: "6pack" <6pack@autox.team.net>
> Subject: Re: Roller Rockers
> Date: Fri, 22 Nov 2002 21:52:54 -0500
>
> Roller rockers don't increase power.
> They only decrease friction. Any HP increase will be almost
> incidental.
>
>
> Jim
> ----- Original Message -----
> From: "michael lunsford" <mblunsfordsr@yahoo.com>
> To: <6pack@autox.team.net>
> Sent: Friday, November 22, 2002 8:10 PM
> Subject: Roller Rockers
>
>
> > Listers,
> >
> > i just installed a new set of roller rockers on my TR6. It runs
> fine but
> I haven't noticed any dramatic increase in power. I've set the
> intakes at
> .012 and the exhaust at .014 per our local LBC expert. I plan to
> purchase
> an S-2 cam later but due to a recent rebuild with a new stock cam I
> don't
> want to mess with something that is working well at the moment. The
> reason
> for this post is that i have just checked the compression and have
> found
> that the compression is down across the board about 30 PSI (170 from
> 200
> PSI). Is this normal? Have I done something wrong? I have reset
> the lash
> on the rockers twice and still have the same results.
> >
> > Mike Lunsford, 1970 TR 6 with a 73 late type head.
> >
> >
> >
> > ---------------------------------
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