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HOSS
12-02-2003, 05:02 PM
What should I read on the gauge? I say 123. Anyone? `74 Nova 250 motor.
BrendellaJet
12-02-2003, 05:15 PM
My guess is that it depends.
It does, doesn't it. Seems like if the cam were advanced or retarded you would see different readings?
HOSS
12-02-2003, 05:32 PM
I`m talking a straight up stock motor. Advertised compression is what is listed.
Nstigator74
12-02-2003, 05:55 PM
A 9:1 motor should be 150-160psi.....so I guess 8.25:1 (not worn out)130-140psi...
HOSS
12-02-2003, 05:59 PM
130-135 I`d roll with on 8.5:1.
Nstigator74
12-02-2003, 06:05 PM
sounds like you already know what you're talkin bout then:rolleyes:
Hotcrusader76
12-02-2003, 10:49 PM
Wouldn't the cam specs also have something to do with dynamic compression you're reading on a warm engine being turned over?
With that being asked guessing the static compression ratio on a motor based off dynamic compression wouldn't be very accurate, specially when most engines have different valvetrain timing events.
The dynamic compression ratio would vary on RPM and VE of the engine being tested, anywhere from 3.0-8.5:1 would be something I would guess on your indicated motor.
So what's the catch Hoss? I think BrendellaJet and I are on to something here, no?...
:D
HOSS
12-03-2003, 07:23 AM
NO! LMAO
This is a simple question. No tricks. You 2 guys are reading wwwwwaaaaaayyyyyy too deep. But funny as hell.:D
Straight up question. ;)
Hotcrusader76
12-03-2003, 10:03 AM
Ok...LMAO...
My educated guess is based on these reasons...
1. Why else would HOSS be in the gearhead section trying to stump somebody unless it was a way out in "left field"?
2. An inline 6 that barely makes a 100HP and since compression makes HP...well we know where this is going...
3. What in the hell is HOSS doing wasteing valuable "Sandbar" time over here in the gearheads section over a inline 6 motor?
My verdict...
Somewhere around 70psi
~Ty:D
HOSS
12-03-2003, 10:11 AM
I`ve been weining myuself from the sandbar. I want to get back to my roots. Gearheads, Jets, Bench Racers.
70 psi? No way. The motor won`t run under 108-110.
Hotcrusader76
12-03-2003, 10:13 AM
Just a guess...
:D
Hotcrusader76
12-03-2003, 10:16 AM
oh yeah....and welcome home Hoss....
Hope ya stay awhile. I here "spanking the monkey" is the hottest topic right now up north.:D
HOSS
12-03-2003, 01:17 PM
yeah, pretty weird eh? That and the pic Rexone put up of me. The bastard!:cool:
Hotcrusader76
12-03-2003, 02:37 PM
Well when ya get done hearding the sheep up there, stop on by and get yourself a cold-one in the gearheads section and while you're hear answer the freaking trivia question you asked us. We're in suspense:p
H2OT PURSUIT
12-03-2003, 10:35 PM
I think you ought to take that question to the Bench.