Power Guesstimations?

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Power Guesstimations?

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Chevrolet >> Brand Review >> Engine & Internal >> Power Guesstimations?

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Power Guesstimations? - 4/17/2008 12:15:25 PM

71Nova

Posts: 2
Joined: 4/17/2008
Status: offline

Hey all, this is my first post over here, I was wondering what you guys think this engine comp would put out? I know the heads are kinda big, but I plan on keeping my foot in it as much as possible.

454 .60 Over
Compression should be about 8.5:1
Comp Cams XE274H Cam
Lift is .552/.555
Duration is 274/286
Duration @ .50 is 230/236
LSA is 110
Heads are Pro-Comp Aluminum, 320cc intake runners, 2.250 Intake, 1.880 Exhaust, 115cc chambers, probably going to polish the ports, definately not hog anymore out however.
Flownumbers are advertised as
LIFT INT EX
.100 75 63
.200 170 119
.300 240 165
.400 301 199
.500 325 230
.600 340 250
.700 362 270
Stainless Steel 1.7 Full Roller Rockers
Long Tube headers
3" Exhaust, with straight through open warlock mufflers
Edelbrock RPM Air Gap Intake, gonna polish the ports on this too.
Edelbrock 800cfm Thunder Series Carb

Anyone got any suggestions on how to get some more power out of this combo either? Any suggestions are very welcomed!

Post #: 1

RE: Power Guesstimations? - 4/18/2008 5:14:12 AM

jmack91z28

Posts: 162
Joined: 2/27/2008
Status: offline

Why are you leaving compression so low? For future blower or for cheaper gas or what? For the size of the heads the cam seems like it's a little too small you know? You could probably stand to go with a slightly longer duration and lift, but I could be wrong. Seems like a hell of a set-up though, gonna be a good rat. I'm guessing you've got a good cooling system as well, to cool that overly bored big block?

_____________________________

1994 K2500 454 4L80E 14bolt 10.5" w/ 4.10's

(in reply to 71Nova)

Post #: 2

RE: Power Guesstimations? - 4/18/2008 9:53:22 AM

71Nova

Posts: 2
Joined: 4/17/2008
Status: offline

I bought the car with the 454 already in it, got a good deal on it so I don't want to have any machine work or change the pistons, so no zero decking or domed pistons to raise compression, which is why I went with a shorter duration cam so I could build cylinder pressure.
Cooling system consists of a 4 core radiator, electric fan, and high flow aluminum water pump. I hope that's enough to keep it cool on the street in west texas.

(in reply to jmack91z28)

Post #: 3