Cylinder PSI
01-16-2007, 07:07 PM
#1
Registered User
Thread Starter
Join Date: Jul 2005
Location: Southaven Mississippi
Posts: 2,053
Cylinder PSI
Today with Captkens help. i pressure tested my engine. this is what i got
1. 191
2. 189
3. 186
4. 185
5. 191
6. 188
about 10lbs less per cylinder with throttle closed.
engine warm.
128 low factory std. 171.
what you say about them?
1. 191
2. 189
3. 186
4. 185
5. 191
6. 188
about 10lbs less per cylinder with throttle closed.
engine warm.
128 low factory std. 171.
what you say about them?
not higher. and these tests are perfromed with spark plugs out. and engine off.
01-16-2007, 08:24 PM
#9
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Join Date: Jul 2005
Location: Southaven Mississippi
Posts: 2,053
well. if that's the case. then the turbo readings done on the car out back of Captkens house are way to low. an he needs to rebuild his engine. But accrording to the FSM. that 128 low factory std. 171. are Stock N/A F54 flat tops.
01-16-2007, 08:45 PM
#11
Registered User
Join Date: Oct 2006
Location: Southaven, Ms.
Posts: 218
compression test
my readings were: a low of 138 lbs. to a high of 141 lbs.
Turbo car
The standard is 142 lbs.
The minimun is 100 lbs.
N/A car
The standard is 171 lbs.
The minimum is 128 lbs.
Turbo car
The standard is 142 lbs.
The minimun is 100 lbs.
N/A car
The standard is 171 lbs.
The minimum is 128 lbs.
Last edited by captken; 01-16-2007 at 08:48 PM.
01-17-2007, 07:32 AM
#15
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Thread Starter
Join Date: Jul 2005
Location: Southaven Mississippi
Posts: 2,053
i had key in the POS just to let the starter have power. So injector's never even fired a shot. and there is not cold start. So you can try to unplug it all day. and you'll never find it
01-17-2007, 08:04 AM
#16
The Evil Twin
Join Date: Mar 2001
Location: Seattle, WA
Posts: 9,294
I got readings of 177-179 on all six at 199,000 miles on my NA engine.
You've got the later engine, higher compression, and maybe at one point someone did some head work and had the head shaved a little. or you have good rings, good seal on the valves, and some nice even carbon buildup in each cylinder.
You've got the later engine, higher compression, and maybe at one point someone did some head work and had the head shaved a little. or you have good rings, good seal on the valves, and some nice even carbon buildup in each cylinder.
01-18-2007, 02:07 PM
#22
NisTuner
Join Date: Sep 2005
Location: Cleveland, Ohio
Posts: 2,800
That sounds like pretty good compression. When I compression tested my 83' Turbo engine I got 140-141 across all 6 cylinders. Needless to say a 90k mile engine with perfect compression. I was pretty happy with that.
