Compression check on my 180k mile stang

91lxvert

Member

Dec 13, 2003

110

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16

Oct 20, 2004

#1

• Oct 20, 2004

• #1

well im planning on supercharging my 91 5.0 before the year is out and i went a head and did a compression check on it to see the state of the motor since it has 180k on the complete factory motor from intake to oilpan .

i got 124psi in every cylinder

im assuming this is good

the motor doesent have one single leak and doesent consume any fluids, and looks as if it is still new.

any tips before install, i will be putting on a 255lph fuel pump at time of install, along with a afpr and guage.

so, do you guys think ill be ok with puttin a novi 1000 kit on it and bumping the boost up to about 8 or 9?

thanks

 

green

New Member

Apr 26, 2003

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Oct 20, 2004

#2

• Oct 20, 2004

• #2

that sounds excellent to me 124 psi on all cylinders with 180,000 miles. thats better than excellent.

 

281pony

Active Member

Aug 31, 2003

2,681

2

46

Oly, WA

Oct 20, 2004

#3

• Oct 20, 2004

• #3

stock compression is around 170 i think.

i have 120-125 on all my cylinders too and im rebuilding. 8-9 psi? that is probably too much. i wouldnt run anymore then 5 psi. whatever you do, watch for head gaskets.

 

TrickStang37

New Member

Oct 17, 2004

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Oct 21, 2004

#4

• Oct 21, 2004

• #4

basically as long as its within 20% of each other and the engine is not drinkin oil it should be fine. even if you do blow the bottom end, a used 5.0 shortblock is a dime a dozen, could just pick up another for $100-$200

 

91lxvert

Member

Dec 13, 2003

110

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16

Oct 21, 2004

#5

• Oct 21, 2004

• #5

im sure ill probably have a head gasket blow on me at some time, seeing as though the intake has never been off the motor since it was at the ford plant

but the bottom end seems like it should be fine, atleast to me it does, plus if it blows ill just build a 331.

 

B

blk92stangg

New Member

Jan 30, 2004

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Hawaii

Oct 21, 2004

#6

• Oct 21, 2004

• #6

If you can so easily foot the bill for the 331, I would suggest you just go that route in the first place? For me, money is pretty tight, so I would have to scrounge around for the SC, install it myself, and hope for the best. If it blew, I would be looking at riding the bus for a few months...

 

bmorrisj

Member

Sep 26, 2003

449

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17

Buena Park, CA

Oct 21, 2004

#7

• Oct 21, 2004

• #7

just did a compression check on my 180k motor and got 145~150psi around...