giddyup306
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What is the compression ratio for a stock 5.0?
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giddyup306
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pairofnines said:For real? I don't mean to falsify your statement, but what proof do you have? I don't think they would over rate it, there isn't a purpose.
No it's 8.8:1. I don't know where you guys are getting your specs but I'm getting mine directly from FORD. 64.00+5.50+9.68+617.78 / 64.00 + 5.50 + 9.68 = 8.80:1. BTW the E7TE head is 64cc's. Ford also stated "For the 1987-93 model years, Ford advertised a nominal compression ratio of an even 9:1.".
pairofnines
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giddyup306 said:
My bad dude, I just got the 9.0:1 from all my other books, I don't have the Ford Mustang Manual yet, but thanks for the correction.
What correction?
And why does the alleged 8.80:1 CR, which purportedlly comes from Ford, contradict their stated 9.1:CR?....
First "Ford" says 8.80:1 and then says 9:1? What's what?
Where is this 8.80:1 coming from and for which model year's engine? Where is the 9.1: coming from? And what are the figures 5.50, 9.68, and 617.78 of?
The stated compression ratio rating for the '87-'93 Mustang's H.O. 5.0L engine was 9.0:1. This comes directly from FoMoCo's advertisements and dealer brochures.
And why does the alleged 8.80:1 CR, which purportedlly comes from Ford, contradict their stated 9.1:CR?....
First "Ford" says 8.80:1 and then says 9:1? What's what?
Where is this 8.80:1 coming from and for which model year's engine? Where is the 9.1: coming from? And what are the figures 5.50, 9.68, and 617.78 of?
The stated compression ratio rating for the '87-'93 Mustang's H.O. 5.0L engine was 9.0:1. This comes directly from FoMoCo's advertisements and dealer brochures.
giddyup306
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FoxChasis said:
I have no idea why Ford did it. I just know they did.
FoxChasis said:
9:1 is what they advertised and 8.8:1 is what it really is.
This is the formula to figure out compression ratio. 5.5 cc is the valve relief 64cc is the head cc the gasket is .047" which comes out to 9.68cc and 617.78 is swept cylinder volume. If anyone wants to argue with the formula be my guest. It's still 8.80:1.FoxChasis said:
FoxChasis said:
Like I said Ford advertised it as 9:1 but for reasons unknown it's not.
willys1
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How come Ford says they changed the way to figure out HP and went down to 215 HP in 1993(political) When the only change to the motor was lighter pistons.Chilton books say 93's have 235 hp which I tend to believe because the lighter pistons would let the motor produce more hp.Whats the deal?pairofnines said:
pairofnines
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willys1 said:
I believe the reason they changed the numbers was because they rated it with all of the accessories on, when the previous years the had them off. And I'm sure the underrated horsepower ratings from Ford may have lowered insurance a little
bgjohnson
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willys1
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Ive read they changed because the body style came out in 94,and the new engine was coming out in 96, so they wanted it to look a little better then the out dated 5.0.pairofnines said:I believe the reason they changed the numbers was because they rated it with all of the accessories on, when the previous years the had them off. And I'm sure the underrated horsepower ratings from Ford may have lowered insurance a little
from what i have read over the last two or three days it ranges from 60.0 to 62.0, I have not seem anything that saids 54 or 58 CC's.
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