400 sbc guys, whats your setup and you hp/tq?
Thread Starter
Supreme Member
Joined: Aug 2005
Posts: 3,004
Likes: 4
From: Yellowknife, NWT, Canada
Car: 84 Z28
Engine: 357
Transmission: TH-350C
Axle/Gears: 3.43
400 sbc guys, whats your setup and you hp/tq?
Just wondering if anyone has had a chance to put their 400 on a dyno and what you came up with.
Im looking for more power but i think im going to have to keep it N/A for now and was looking to go up in cubes.
Digital dyno is giving me some weird results...
It appears that my 357 as mild as it is will have a bit more power over a identicle setup 400... what gives? lol
If all goes well and a 400 looks to be a good direction to go, i can probably sell my current 357 to my buddy that wants to build a 383. That will knock down the price of a new 400 block substantially!
By the looks of what digital dyno is telling me im probably better off just buying a set of cheapo aftermarket heads for the 357 and seeing if i can blow something up....
Im looking for more power but i think im going to have to keep it N/A for now and was looking to go up in cubes.
Digital dyno is giving me some weird results...
It appears that my 357 as mild as it is will have a bit more power over a identicle setup 400... what gives? lol

If all goes well and a 400 looks to be a good direction to go, i can probably sell my current 357 to my buddy that wants to build a 383. That will knock down the price of a new 400 block substantially!
By the looks of what digital dyno is telling me im probably better off just buying a set of cheapo aftermarket heads for the 357 and seeing if i can blow something up....
Last edited by 84z28350; Dec 23, 2006 at 10:41 PM.
Senior Member
Joined: Sep 2005
Posts: 717
Likes: 4
From: Edison nj.
Car: 84 firebird
Engine: 400 sbc
Transmission: th350
Axle/Gears: 3.08
my set up that i will run is vortec heads/summit cam combo good for 12's probably 11's. the exzact same set up minus stall ran a 12.1 in a 3700 pound camaro off idle
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