454 Cam Specs
Melting Slicks
Joined: Dec 2005
Posts: 2,441
Likes: 0
If they're not identical I'd guess they're real close. The biggest difference in the two is the method they used to derive the HP numbers, and the compression ratio. A '74 454 should be around 365hp in 1970 numbers.
Instructor
Joined: Nov 2005
Posts: 232
Likes: 0
From: Millersville Maryland
I have been wondering the same thing myself. Not to hijack your thread 435, but what would it take to make a 74 454 scream like the 70 454? It is the same block, besides the compression right? I would like to have the HP but with the stock look.
Racer
Joined: Mar 2005
Posts: 393
Likes: 3
From: Dallas, TX
if you run around 10-10.5:1 and keep the stock look meaning original iron heads youll need 100+ octane fuel. as for making big power and keeping it stock looking, you could change the cam obviously, then get some different pistons and acid port the cylinder heads and intake, this is something the NHRA stock racing class guys do, you get better intake flow numbers and make more power. as for that high cr, you have to use higher octane fuel.
-alex
-alex
Burning Brakes
Joined: Feb 2006
Posts: 1,024
Likes: 1
From: AL
i'm running just under 10:1 with al heads & aftermarket cam, no problem. been using 93 octane, don't know what would happen if using less? might run fine? some say static comp can be bumped up with al heads, others disagree . . .
Instructor
Joined: Nov 2005
Posts: 232
Likes: 0
From: Millersville Maryland
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Burning Brakes
Joined: Feb 2006
Posts: 1,024
Likes: 1
From: AL
i had a 70 350/370 that just wouldn't run on 93 unleaded, finally had to drop cr so i could hear the radio over the valves . ..
Thread Starter
Racer
Joined: Mar 2006
Posts: 473
Likes: 0
From: Mooreville Ms.
these are all factory spec motors. the 435 has an aftermarket cam because the original was bad but it was cut to factory specs. I'm just wanting to build my 74 back to 70 specs and wanted to know if they used different cams. I know they used different head castings but not sure if they are different chambers or what. this is a matching # car so I only want to change internal parts and keep it looking correct... thus the question on cam specs.
Drifting
Joined: Sep 2004
Posts: 1,959
Likes: 1
From: North Bend Ohio
Instructor
Joined: Nov 2005
Posts: 232
Likes: 0
From: Millersville Maryland
sorry if I hijacked it, but what you are attempting to do is exactly what I have been looking into doing since I got mine. Like yours, it is numbers matching but lacking the power I know it deserves. Tell me, but exactly are doing to yours? Type of cam, heads, are you keeping the QJet or going with something else?
