did a compression test on my car. All cylinders average 140 to 150. Im happy. What does a new engine usually average around?
2006-08-06 00:15:34 · 7 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Ford
do you think Im some kinda idiot? Damn
2006-08-06 01:35:49 · update #1
I had a fresh 383 chevy circle track racing engine that was around 185 -190 with 11.5 to 1 domed pistons, My high mileage 5.0 ford has 110 - 125 & runs ok.
New engines will probably be in the 145-175 range, depending on the compression ratio.
2006-08-06 06:32:45 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Do some research on your particular vehicle and find out what the compression ratio is. And yes, you should remove all spark plugs before doing the compression check.
On the older Jaguar XK-E's, (depending on the year) the compression ratio was 9:1 which I considered high.
On my '70 Corvette 350 c.i. motor, the compression ratio was 10.25:1 which surprised me. But, I didn't know what the Corvette engine ( 350 cubic inch ) was supposed to be.
All in all, however, sounds like your results would be near correct or average.
Mack
2006-08-06 02:28:21 · answer #2 · answered by Mack 5 · 0⤊ 0⤋
Depending on the year, usually, 150 to 175 psi.
Models in the mid 70's slightly less
2006-08-06 00:33:33 · answer #3 · answered by kayef57 5 · 0⤊ 0⤋
I have never had to do a comperssion test on a new motor, but it depends on the piston dome that effects the compression in a motor. The valve lift also affects it as well.
2006-08-06 10:22:59 · answer #4 · answered by Josh S 7 · 0⤊ 0⤋
you dont ought to get rid of any fuses.only take out all plugs and insert a compression guage into the plug hollow and crank the engine over and skim the guage.oh!iam sorry chum,i comprehend now what your talking about.you want to disable the gasoline pump.only take out the fuse that runs the pump.iam sorry about that.
2016-11-23 12:42:15 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Did you remove only one spark plug when checking the compression?
2006-08-06 01:16:12 · answer #6 · answered by Trump 2020 7 · 0⤊ 0⤋
A new engine will run pretty close to that.
2006-08-06 10:26:19 · answer #7 · answered by sunflowerlizard 6 · 0⤊ 0⤋