compression

[88stangmangt]

i have a 88gt with less than 70k on it i recently did a compression test on it to see if i was gonna re-build it but i dont think i did it right it cam out more than 10%(i think next i will do a leak down). is it common for rings to go bad in only 69k in our 5.0's???????????????????? i am just gonna put it back together slap a vortech on it and hope for the best. it has been since fall that i have driven it and cant stand it no more!!!!!!!!!!!!!!!!!!! i havnt heard my flows in about 3 months!!!!!!!!!!!!!!!!!! im dieing.

 

[88stangmangt]

^^^^^^^^^^^^^NUMBER 302!!!!!!!!!!!!!!!!!!!!!! hell ya!!!!!!!!!!

 

[90mustangGT]

Cam out? The valvetrain needs to be working for a proper compression check. How is air going to get in there and get compressed w/o the cam in the engine.

 

[88stangmangt]

no it is all still in and together long tubes/throttle body/wires and all that crap are off but everything is still on. And it runs strong!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! so i think i will try my luck.

 

[fly4spd]

when he said "cam out", he meant "came out", it looks like

 

[TheUser]

I won't say it's the best idea, but i'm doing the same thing lol so...except I got one cyclinder pushing like 40 psi and the rest are 125-150

 

[jerry beach]

I won't say it's the best idea, but i'm doing the same thing lol so...except I got one cyclinder pushing like 40 psi and the rest are 125-150

That is not a good plan, think about it.

 

[88stangmangt]

well i know this if there is pepole out there with almost 200k on there block and run great compression and then mine with 69k im gonna be pist!!!!!!!!!!!!!!!!!!!! if i have to re-build

 

[90mustangGT]

70psi is nessasary for combustion. Yes fuel will burn with less, but to actually combust, it needs that kind of pressure. TheUser: Check that cylinder again, if it still gives you below 70psi, try adding a little oil to the combustion chamber, if it does nothing, you probally have a valve train or head problem, if it rises, you have bad rings most likley.