does anyone have any idea why my compression would look like this???

cold
#1 205
#2 195
#3 204
#4 125
after drivin
#1 205
#2 205
#3 205
#4 205

car details
1998 240sx ka24de
248/232 cams
drop in k&n
dual electric fans
full exhaust no cats

problems
exhaust cam is harder to turn manually then intake cam like waaay harder

 

Do it again, if you get similar results, post it up. It was probably a one off test

 

yeah i ran it two othr times
and now im reading 205 on all cylinders

 

rings or valves

 

im gonna say rings.

best way to test...

do it cold since thats when you get odd numbers. make sure that while youre cranking it over, you have the gas at WOT. on the low cylinders (#4) add a little bit of oil down the sparkplug hole, crank over a couple times, then retest. if the numbers go up significantly, then its your rings. if they go up a little bit, but arent even close to the other numbers, then its your valves.

 

try some seafoam, loosening up some carbon deposits may help - better than a ring job for sure