how much psi would each cylinder have on an LT1 93 from a Camaro Z28...???

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89 Camaro RS Stock as a women with white panties
LT1 IS COMMING SOON.

 

Matt,

Do you mean cylinder compression?

I've checked mine at 145 PSI (average) and it was on a known good engine (new valves, tight holes). Something with a stock cam and the stock valve timing might even get higher numbers, but that is what a fresh LT1 does with a more aggressive Comp cam.

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Later,
Vader
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"I'm'a do Things My Way - It's My way or the Highway."
Adobe Acrobat Reader

 

I'm getting from 134 to 148 without the Full open trottle....it this a good engine ???... ??? It's bare stock ...



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89 Camaro RS Stock as a women with white panties
LT1 IS COMMING SOON.

 

the big thing to look for is a differance of 10% or so between the numbers. i'd expect maybe a little higher but what you got isn't bad at all.

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ICON Motorsports

1st & 3rd
MM Black Diamond Lodge 538 F&AM

 

What difference would it make with or without the full open trottle ???




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89 Camaro RS Stock as a women with white panties
LT1 IS COMMING SOON.

 

Partially open throttle causes partially filled cylinders during compression tests just like it does when the engine is running. It will make all your readings low by some unpredictable variable amount, and renders any results you get absolutely meaningless and useless.

Most engines with the compression and cams they are using these days will show about 165 or 175 on a compression gauge. The absolute number you see on the gauge is affected by a number of things so there's no "right" number.

Do the test right, then like ede said, look for consistency between cylinders.

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"So many Mustangs, so little time..."
ICON Motorsports

 

A better indication would be a leakdown test.

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82 camaro--original steering wheel, brake/gas pedals, seats--everything else modified
82camaro