i have a ea82t with ea81t pistons what should my compression be they are all even at 100 is that low

That's a bit low, but as long as they are even it should be fine. I don't have numbers for an EA82T but for the EJ22T the comp. is listed at about 140 psi. EA82T's are lower compression though so I would assume around 120 to 130 would be ideal.

 

You are doing the test with the throttle wide open right? Fuel pump disconnected?

 

GD

all spark plugs out fuel pump disconnected full throttle... did the ea81t pistons lower the compression more?

did the ea81t pistons lower the compression more?

 

From what I know both were 7.7:1 so they shouldn't have. The EJ22T is 8.0:1 for comparison. So it shouldn't be much lower in comp. numbers.

 

As I said though - it's a lot more important that they are even than it is for them to be high. Anything over 100 should run without any problems. Remember that the engine runs at a minimum of 700 RPM's. At speed the small leaks you are experiencing that bring your numbers down to 100 are going to be insignificant. It is a good indicator of general ring and valve sealing though so I wouldn't be boosting that engine to moon without a full overhaul - if the rings leak a bit you can collapse ring lands with too much boost.

 

GD

might i add the engine has 600 miles on a rebuild

might i add the engine has 600 miles on a rebuild

 

Then either the rings haven't properly seated, or the hone job was crap. Were chrome rings used? It can take 10,000 miles for them to properly seat. 600 miles is nothing - I wouldn't be taking any readings till I ran that thing at 3k on the freeway for a couple hours.

 

And you better be changing the oil pretty soon. The first 1000 miles there's a ton of metal going to need to come out.

 

GD

alright ill get back to this post after a few k miles

and btw ccr built the short block

my 86 gl10 had a whopping comp. of 65! not 165 but just 65psi lol.

anyone able to DRIVE with this low of comp?

btw it has over 206K miles, and bad headgaskets for 3months

My EA82T with 137k miles is 124, 125, 126, 122.