Per thread title, I am looking for A/B results on dyno with Performer 2151 vs Performer RPM on a 455 with typical 23x° @ .050" cam, iron heads, etc.

I know what both are supposed to do and why they are what they are, just wondering if anyone has actually done a comparison on a dyno with both?

Thanks.

 

That’s on my list once I finish my big block Dyno mule. However probably not for another 90 to 120 days.
But the stock irons will be a limiting factor anyway so....

 

Absolutely. The car in my avatar is my cousin's and I'm taking care of powertrain using what he already owns. Otherwise it'd be LS7-based if there was money to spend.