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 Post subject: Re: Solid cams
Posted: Sun Oct 31, 2010 9:58 pm 
Getting Side Ways

Posts: 6449

Joined: 11th Nov 2004

xcabbi wrote:
Is it true that solid lifter coversion running a hydraullic cam would offer no real performance advantage except for an increased rpm ceilling (typically over 6500 rpm)?

You would loose a little lift and a little duration from the lash setting.
And would be able to rev higher if lifter pump (HLA pump in this case) was already an issue.




 Post subject: Re: Solid cams
Posted: Sun Oct 31, 2010 11:23 pm 
Smokin em up

Posts: 264

Joined: 19th Sep 2005

Location: Perth
WA, Australia

I have had a bit of experience with standard hydraulic, rhoads hydraulic and solids in holden 202s.

I switched from standard hydraulic to rhoads hydraulic and immediately gained 500rpm extra and a better idle (no other changes). The rhoads lifter did exactly what they said. They are meant to act like a solid at higher revs

I also used to run a 36/78 solid cam and that used to do 7500rpm all day.

I would agree that you would gain more revs and the lash would lower the duration and lift slightly.



Turbo 6s rule

 Post subject: Re: Solid cams
Posted: Sun Oct 31, 2010 11:55 pm 
Getting Side Ways
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Age: 64

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Power: 482 rwkw

Location: Penrith
NSW, Australia

Although lash is taking some lift out of geometry in a solid..
Keep in mind hydro lifters act like sponges also.. In fact in most cases hydro cams have / can have more aggressive profile..
IMO a nice turbo cam would be rather sedate BUT be very rev able due to mechanical cam where there's no chance of lifters pumping up...
Not in this case but V8 solids are lighter that hydro rollers which limits it's max rpm..
Another advantage with mech cam is valve spring tension can be quite high.. When a hydro cam lifter will fail...



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