fafsa

well i bought this built/sleeved h22 shortblock thats suppose to have 9:1 compression but i did a compression test today and it reads a little high

i disconnected the ecu fuse/took out all the plugs and wires and i did it about 2 mins after i was driving for about 10 mins. is it b/c i didnt take off the injector clips too is that why its reading kinda high?

cyl1= 210 cyl2=205 cyl3=215 cly4=210

i know its sleeved and has forged internals so, whats up? could it have 9.5:1?

HERE IS A PIC OF THE TESTER GUAGE:

XxRoCkMaNxNEOxX

iTrader: (3)

i say if the numbers are close to one another then its all good.

platinum00

how many miles are on the motor. you could just have a real nice seal.

i had 8.5.1 and had 210 across the board.

platinum.

fafsa

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XxRoCkMaNxNEOxX &raquo;</TD></TR><TR><TD CLASS="quote">i say if the numbers are close to one another then its all good.</TD></TR></TABLE>

yeah, the numbers arent even +/- more than 5

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by platinum00 &raquo;</TD></TR><TR><TD CLASS="quote">how many miles are on the motor. you could just have a real nice seal.

i had 8.5.1 and had 210 across the board.

platinum.</TD></TR></TABLE>

the motor has about 2,200 miles on it. still n/a for right now. im just waiting for all my parts to come in.

Cyphear

the #'s themselves will vary due to engine temperature, and atmopsheric presure and ****.

will disconnecting the ECU fuse keep fuel out of the cylinders? if not then fuel in the cyilnders will raise your #'s.

platinum00

i would say your good to go man..

check the numbers again before you starting boosting hard.

platinum.

coupon

looks like you got a nice *** ring seal

mattssi

Those numbers lok good. Even for your low compression. That block should run ****.

RyanEJ8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cyphear &raquo;</TD></TR><TR><TD CLASS="quote">
will disconnecting the ECU fuse keep fuel out of the cylinders? if not then fuel in the cyilnders will raise your #'s.</TD></TR></TABLE>

Disconnecting the ECU fuse will keep fuel from going into the cylinders.

DFW

iTrader: (1)

#'s seem fine

turbod16y7vtec

i wouldn't boost big till the compression goes down..

Scean

i think boostin realllllllllllllllly big might make the compression go down a lil

coupon

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbod16y7vtec &raquo;</TD></TR><TR><TD CLASS="quote">i wouldn't boost big till the compression goes down..</TD></TR></TABLE>

why not?

fafsa

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowredhybrid &raquo;</TD></TR><TR><TD CLASS="quote">

why not?</TD></TR></TABLE>

wondering too

AspectIndustries

My compression is reading 210 across on my stock GSR motor! I think this may be due to the OPEN downpipe clogging it up while running rich for few months, DIRT RICH.

at 5500 feet elevation if that matters.

Been boosting over 6 months plus, and loving it.

pbandj

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by synik &raquo;</TD></TR><TR><TD CLASS="quote">My compression is reading 210 across on my stock GSR motor! I think this may be due to the OPEN downpipe clogging it up while running rich for few months, DIRT RICH.

at 5500 feet elevation if that matters.

Been boosting over 6 months plus, and loving it. </TD></TR></TABLE>

so if he's running rich it will cause it to read higher #'s?

PM-Performance

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by platinum00 &raquo;</TD></TR><TR><TD CLASS="quote">how many miles are on the motor. you could just have a real nice seal.

i had 8.5.1 and had 210 across the board.

platinum.</TD></TR></TABLE>

I agree. Compression of the pistons has nothing to do with doing compression tests. good numbers means you have a good seal, not that your pistons are a higher compression.

pbandj

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">

I agree. Compression of the pistons has nothing to do with doing compression tests. good numbers means you have a good seal, not that your pistons are a higher compression. </TD></TR></TABLE>



any truth to the running rich causing higher #'s?

PM-Performance

if you are running soo rich that a mass amount of carbon deposits are left on the piston tops , then yes, i can kinda see it. But more than likely all the cylinders wont be equal if thats the case. Thats why its good to run some carbon cleaner type **** thru the motor to clean everything up and break up those deposits

pbandj

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr206 &raquo;</TD></TR><TR><TD CLASS="quote">if you are running soo rich that a mass amount of carbon deposits are left on the piston tops , then yes, i can kinda see it. But more than likely all the cylinders wont be equal if thats the case. Thats why its good to run some carbon cleaner type **** thru the motor to clean everything up and break up those deposits</TD></TR></TABLE>

i see, so i guess your good than fafsa, since there are only a little over 2000 miles on your build

platinum00

i also dont think a motor with 2000 miles on it will have alot of carbon deposits unless there is some other issue

Also i just normlay diconnect my fuel pump fuse when doing the test.


platinum.

PM-Performance

i disco the dist plug and the fuel injector plug when i do them

0BoostedJeff

not a bad thing!!!!