#1 195 PSI
#2 188
#3 198
#4 190

The engine seller has provided these compression test numbers which he said are low due to being taken when the motor was cold. I have to admit I'm a bit reluctant to pull the trigger on this motor yet without getting some of your impressions/feedback. My understanding is a new/healthy motor that is up to temp is about 220-240? So if these are indeed cold test numbers, what could I expect these to move up to hot? Does this motor appear to be a good one with these numbers? The seller seems to be known/reputable on s2ki. There is no warranty, he purchases s2k's from auction and parts them out.

Thanks for your feedback

 

he is running without rings!!! hahaha

 

My current motor just for the sake of comparison, hot showed 2 cylinders at 190 and two at 160. But regardless of the numbers, the quart of oil it burns in 300 miles is a dead give away, that and the smoke coming from the front breather. I think my motor is missing rings. The moral of the story, fuel in oil is bad. Rich running is only "safe" to a point And dont be the Ginny pig in your area on a new tuning device unless you know for a fact your tuner is going to support your ass when the shit hits the fan.

 

hehehe ive done that before. sad days. i have also smacked a valve before which was also a hassle. fi is evillll

 

Its not necessarily an FI issue for me, its a poor partial throttle running/tuning issue. That can happen N/A, but yes typically the chances go up with FI do to the nature of tuning requirements. I can say for a fact this wasn't a boost issue, though my tuner would have you feel differently of course, what ever he has to say to justify washing his hands of the situation. But lets get back on track here. I'd like to get some informed feedback on this motor I'm looking at. I have to swallow this situation and would like to get back on the road and with a new tuner and tuning method. Thank you!

 

This ones for RT.....Do a LEAKDOWN!

 

No leak down spec provided on this motor, most used motor sellers are lucky to give comp spec it seems, so this is the info I am providing you to base your answers to my questions, if you have any.

If its unclear what I'm asking, let me clarify.

- Are these compression numbers in my first post^^^ consistent with a healthy 56k f22 motor when tested cold?

-What does a fresh/new up to temp motor show?

- Assuming these comp numbers I provided were taken cold, how much higher could I expect to see them if tested to proper temp? I'm trying to get a comparison here to see how worn these piston/rings are. The rest is a gamble I realize, its a used motor. Could have been over revved, oil never changed, or could have been well taken care of and driven properly.

 

Regardless of the actual amount, the fact that the numbers are all so close together makes it seem like the motor is probably OK as far as compression is concerned.

As kind of a rule, sh!t usually doesn't get fuq'd up evenly ........

 

I don't know the specs on a cold motor, but from your reading looks ok. Usually it's one or two cylinders that have bad rings. They all look with 1-5 psi of each other.

On a up to temp motor should be around 135.

The only reason I like leakdowns is also tells you other problems. Do the leakdown yourself before you buy. Compression only tells you part of the motor health.

 

john, you are killing me!