I have searched and cannot find a number.
What should the compression be for a S5 Turbo engine?
Thanks

 

compression ratio or seal compression? also, I'm QUITE certain BOTH those numbers can be found in the FAQ and or FSM...

 

When doing a compression test, what would be a good number?

Anyone have an idea?
I know 110 psi for an NA engine is good, I just do not know what it should be for a turbo engine.

 

I think the compression should be at 85PSI at a cranking speed of 250RPM... thats what it said in the manual on it... www.rx7city.com

 

90-100. are you trying to run my engine? I'm teling you there was some serious knocking when i last drove it. either a stationary gear broke or a bearing spun.

 

about the same...
115-120: excellent
105-114: great
95-104: good
85-94: drivable
< 85: rebuild soon, before it blows itself

HOWEVER, cranking speed is important and fairly impossible to measure accurately, so making sure your starter is working properly and your battery is fully charged are the two key things to ensure you crank fast enough.

 

Great folks that was what I was looking for.
Adriane I am not working on your old engine, it looks like someone popped theirs.

 

Here's the link were I got the info.. http://www.rx7city.com/89-91manual.htm it's the factory manual and thats where i got it... I uploaded a copy of it on my computer.. all you do is click on where it says"save a copy" and you can have a copy on your computer... the funny part about it is that there is no difference betwee NA and Turbo... Check it out

 

Wow, great!
Thank you!