I DID A COMPRESSION TEST ON MY B20-VTEC AND I GOT THESE NUMBER 1-230...2-240...3-230...4-260 IS A 13-1 BUILD ON A B16 HEAD...

 

well its either losing it past the rings or the valvejob isnt sealing on all the cylinders.
do a leakdown on it to see where it is going.

was the head rebuilt when you built the engine? did you take out the fuel pump fuse when you did the comp test? did you have the TB open?

 

NO I HAD THE HEAD ON ANOTHER BLOCK IT WAS FINE..NO COMPUTER OUT AND DIZZY..YES TB OPEN..IS IT A NORMAL COMPRESSION OR IS IT TOO LOW...

 

no one have an idea.....

 

did you run the motor at all yet

 

You have a problem because the numbers should be very close to each other. Did you check valve lash?

 

yes

 

i check the valves they fine..i did another compression test and i got 1-230...2-80... 3-280...4-240

 

1) is the car operating temp when ur doing this.

2) are u cranking the car over 12 times while your foot is holding the gas pedel down.

3) if the valvelash is indeed correctly.. and you spin the car over.. and get 280.. i'd shoot for 260-280 to be decent.. ur enabled 5% variable between the numbers.

 

are those your pistons in ur sig? if so, with a gsr head on my b20vtec, cold i was almost getting the numbers ur getting..

 

you bent a valve then your first test was fine to me

your having 80 on cyl2..

you bent a valve. Jumped timing?

 

Yeak but I have b16head

 

I'm sorry is 280 not 80 .......

 

The engine was at full operating temperature?

 

Our last B20V was around 300 for all 4 cylinders, 12.9:1 CR.

 

Ok thanks so they should be around that

 

depending on cams