I am speechless. When Carl (The lonely sole helping me in this project) screamed like a 12 year girl getting her period the first time, I thought, "Now What". His little scream, ended up being a good thing......at least I think it is?

In order from #1-#4. Also, Number 1 read like the others on a second try. We did it again since the number was lower but it got better (270)

Cyl #1


Cyl #2


Cyl #3


Cyl#4



And for all the non-believers, we took a vid of it.

 

wow whats your cr ratio, that seams realy high or is it just me

 

that is some retarded high compression.


Rob

 

how many cranks was that?

 

my ratio is 9.1 and mine is like 180 ish

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rjardy &raquo;</TD></TR><TR><TD CLASS="quote">that is some retarded high compression.


Rob</TD></TR></TABLE>

Exactly my thought. I am not even sure this is a "Good Thing".

Anyway, I can't remember how many cranks. I would have to ask Carl (Demigod here). I will post the video when I can keep my eyes open long enough to do it.

Finaly compression according to Endyn is around ~9.6-9.8.

 

.....that's awesome man. Goodluck w/ the project

 

i know a stock gsr should read those numbers so you got some high compression the way it looks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C1CYA &raquo;</TD></TR><TR><TD CLASS="quote">i know a stock gsr should read those numbers so you got some high compression the way it looks</TD></TR></TABLE>

Can't be all that high with flat top pistons.

 

well not shure did you have your head shaved or any thing ,what is the piston hight set at?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C1CYA &raquo;</TD></TR><TR><TD CLASS="quote">well not shure did you have your head shaved or any thing ,what is the piston hight set at?</TD></TR></TABLE>


Head wasn't shaved but resurfaced a little by Endyn to make sure it was straight.

Not sure on height as Endyn built the block. At least I didn't check anything on that?

 

no way thats 9:1...9:1 SOHC i have done are 175-190psi...depending on cam.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">no way thats 9:1...9:1 SOHC i have done are 175-190psi...depending on cam.</TD></TR></TABLE>

It has the big Zex cam in it. I am thinking more like 10.5

I guess, I will need to be conservative with the tune huh?

 

well you will not need much boost to make sick power

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C1CYA &raquo;</TD></TR><TR><TD CLASS="quote">well you will not need much boost to make sick power </TD></TR></TABLE>

God, I can only dream.

 

270 psi is more than 10.5

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">270 psi is more than 10.5</TD></TR></TABLE>

Then what is it? Any idea?

Also, this motor only has 15 miles on it with ND oil. Make a difference? Maybe a little tight?

 

Did you do the compression test with the throttle plate open?

 

time for a leakdown test...

As for mine .. approx 9.3:1 C/R

I got 215-220 psi per cylinder and 2%-3% leakdown (Thanks Chris @ NRG). Endyn

 

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

Then what is it? Any idea?

Also, this motor only has 15 miles on it with ND oil. Make a difference? Maybe a little tight?</TD></TR></TABLE>

Well I was at 220-230psi across the board with the SRP 10.5:1 pistons. I calculated compression out to be closer to 10:1 though.

 

Has your gauge been giving you normal #s on other motors?
270 sounds pretty high. Do you have access to another gauge to verify?
Frank

 

have you tried a second compression tester to see the results?

 

270 is REALLY high

 

cr of 9.2 with 210psi does that sound normal?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sinner &raquo;</TD></TR><TR><TD CLASS="quote">cr of 9.2 with 210psi does that sound normal?</TD></TR></TABLE>

Sounds a little high. I would expect 170-190 psi.