Author Topic: Thinking about getting bigger cam??  (Read 118478 times)

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Gnarly4X

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Re: Thinking about getting bigger cam??
« Reply #30 on: Jul 29, 2016, 04:29:47 AM »
Hi Snowtoy,

I re-read your comments and you indicate that there is POWER loss or gain with gear changes.  Perhaps its just semantics?

Its my understanding that changing ring & pinions to lower the gear ratio or changing tire sizes which affect final gear ratio, has zero effect on the torque or horsepower numbers produced by the engine.  Changing gear ratios will only move the torque and HP numbers up and down the RPM range.

For example, the result of changing from 4.10 R&P to 4.88s when going from 28" tires to 33" tires will have a very noticeable "feel" of power increase because the gearing will put the higher torque number in a more usable RPM range.

I could be totally wrong - and if I am - please explain.  :dunno:

Gnarls. :spin:
« Last Edit: Jul 29, 2016, 05:13:24 AM by Gnarly4X »
1986 XtraCab SR5 22RE 5speed W56B, ~16,000 MI after break-in, DIM (Did It Myself) rebuilt engine - .020" over, engnbldr RV head, OS valves, 261C cam, DT Header. https://imgur.com/oACTHTR

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