Richard Holdener Performance
8.1 RHP/ Elgin Stage 1 Camshaft
8.1 RHP/ Elgin Stage 1 Camshaft
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The RHP/Elgin Stage 1 8.1L cam offers 25-30 hp and 25-30 lb-ft of torque gains over the stock 8.1L cam, while maintaining a near stock idle quality. Shown here compared to the very popular ZZ502 BBC cam (required firing order change), the RHP/Elgin Stage 1 cam improved power below 3500 but lost out to the bigger cam above that rpm range. This test was run on a junkyard 8.1L equipped with a ported stock intake manifold, 102-mm throttle body and dyno headers (with no accessories). The test motor was also equipped with an upgraded spring package (look for springs very soon). Both cams were run with optimized AF and timing curves. Your stock combo in the vehicle will see even bigger gains from a cam swap and tune, if you are currently running the stock (mild) tune. For those wanting more power at slightly higher rpm, we are currently testing a stage 2 cam.
RHP/Elgin Stage 1Cam Specs:
Lift 515/508
Dur @ .050: 209/217 deg
LSA 114
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I wasn't expecting too much, but this thing woke the truck up quite a bit. I did the intake plenum modification at the same time, so with both modifications, I can definitely feel a difference. I would like to get a real tune done on it, too, to take advantage of the combo and see how that works. As a side note, I'm betting fuel economy is lower than it used to be, but if you have an 8.1, that's just goes without saying, right?
