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73-87 Chevy _ GMC Trucks => Performance => Topic started by: 454c10 on June 01, 2015, 01:33:44 pm

Title: Performance questions
Post by: 454c10 on June 01, 2015, 01:33:44 pm

Ok so does 454s have hydraulic or mechanical cams stock also would it b too much to put a 750 double pump its got 650 now an intake and headers now i want a cam.im looking in the 550 lift area 

Title: Re: Performance questions
Post by: LTZ C20 on June 01, 2015, 02:02:43 pm

Usually hydraulic or mechanical refers to the type of lifter. They are hydraulic from the factory.

Title: Re: Performance questions
Post by: rich weyand on June 02, 2015, 01:58:50 am

The maximum theoretical air a normally aspirated (no supercharger, turnocharger, or nitrous) 454 can pump at 5000 rpm is 650 cfm.  In practice it will be less than that.  So I think it is probably optimally carbureted at the moment.

Title: Re: Performance questions
Post by: Irish_Alley on June 03, 2015, 08:11:22 am

Quote from: rich weyand on June 02, 2015, 01:58:50 am

The maximum theoretical air a normally aspirated (no supercharger, turnocharger, or nitrous) 454 can pump at 5000 rpm is 650 cfm.  In practice it will be less than that.  So I think it is probably optimally carbureted at the moment.

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