the headgasket on my 2000 gsr blew and before my mechanic took it apart, i had him to a compression test and it came out 170, 100, 170, 170.

obviously the variance is huge, but say it read 170 psi across the board; how would the power output be compared to a gsr motor that put out 230 psi across the board?

also, im having the whole deal done with oem parts and machining. would i have more power with a healthy motor versus one thats running poorly? seems like a no brainer question, but the power seemed on par versus other cars.

 

bump

 

if your going for higher compression you wont really feel a power difference of significance unless you increase the octane of your gas and tune...its like feeling the power difference on a gsr when you put 87 vs. 94...

 

any more comments? i am not exactly going for higher compression, just getting it back to stock with a head job and new gaskets.

 

The ultimate compression number for an engine is highly dependent on the gauge used for the reading, as any dead volume in the gauge will lower the peak number. So unless the same gauge or at least the same model gauge was used on different engines, the results are not usually directly comparible.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">The ultimate compression number for an engine is highly dependent on the gauge used for the reading, as any dead volume in the gauge will lower the peak number.</TD></TR></TABLE>

I never thought about that before. That is a very smart answer.

 

my compression on my ls is 230 all across and i use 91 octane