compression ratio for 93' 5.0 V8 w/ modifications

kelbry · May 5th, 2007, 02:40 PM

Does anyone know about compression for a 93' 5.0 V8? The motor now has a Cobra intake on it, plus long tube headers and exhaust size is 2.5".

1slo5.0 · May 5th, 2007, 10:23 PM

9:1

Racinjason81 · May 10th, 2007, 01:40 PM

+1 9to1CR

kelbry · May 10th, 2007, 07:24 PM

Wow...9:1

I borrowed a compression gauge from someone at work and my husband and I were getting readings (from the gauge) of about 152. Doesn't that mean that the compression is 15:1? I only ask because my car has turned into a 2-cycle. Everytime I add fuel I also need to add oil.
I am going to find someone to take the Cobra manifold off to see if the gasket is not tight or if I need a re-build on the engine.

1slo5.0 · May 10th, 2007, 10:37 PM

Originally Posted by kelbry

Wow...9:1

I borrowed a compression gauge from someone at work and my husband and I were getting readings (from the gauge) of about 152. Doesn't that mean that the compression is 15:1? I only ask because my car has turned into a 2-cycle. Everytime I add fuel I also need to add oil.
I am going to find someone to take the Cobra manifold off to see if the gasket is not tight or if I need a re-build on the engine.

No, cranking compression has nothing to do with the mechanical compression ratio. Cranking compression is a measurement of air in pounds per square inch (or in Kpa). The mechanical compression ratio is a volume ratio between the piston and cylinder head before and after the compresion stroke.

May 5th, 2007, 02:40 PM	#1
kelbry Newbie Join Date: May 2007 Posts: 2 iTrader: 0 reviews	compression ratio for 93' 5.0 V8 w/ modifications Does anyone know about compression for a 93' 5.0 V8? The motor now has a Cobra intake on it, plus long tube headers and exhaust size is 2.5".

May 5th, 2007, 10:23 PM	#2
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	9:1 __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

May 10th, 2007, 01:40 PM	#3
Racinjason81 Hardcore Enthusiast Join Date: Feb 2007 Location: New jersey Posts: 1,559 iTrader: 0 reviews	+1 9to1CR __________________ Heres a real funny video youtube.com/watch?v=ojB7KkaR03I VTEC stands for Very Torqueless Economy Car Honda stands for Hold On Not Done Accelerating 1991 LX 5.0 H/B(T-70 turbo coming soon)

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May 10th, 2007, 07:24 PM	#4
kelbry Newbie Join Date: May 2007 Posts: 2 iTrader: 0 reviews	Wow...9:1 I borrowed a compression gauge from someone at work and my husband and I were getting readings (from the gauge) of about 152. Doesn't that mean that the compression is 15:1? I only ask because my car has turned into a 2-cycle. Everytime I add fuel I also need to add oil. I am going to find someone to take the Cobra manifold off to see if the gasket is not tight or if I need a re-build on the engine.

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