Compression test Question

[rocko5845]

I have the D15b7 with Vitara Pistons and stock rods. My question is this: What should the results be when doing a compression test with these pistons in this motor? The piston height is 28.3mm and dish volume is -15cc. No boring or any modifying to cylinder walls or deck. The ratio went from stock-9:28:1<<<<to>>>>with Vitaras-6:39:1

 

[got traction]

what did the compression test yield? i've seen vitara's go anywhere between 90 and 120 in each cylinder.

 

[rocko5845]

what did the compression test yield? i've seen vitara's go anywhere between 90 and 120 in each cylinder.

Not sure yet, im going to do the test today. I just wanted to know what the test should read so I know if im good to go or not.

 

[got traction]

so??

 

[rocko5845]

I did the test twice to make sure it was accurate. I ended up with 120psi in all four cylinders. The results were the same both times.

 

[got traction]

thats good. as long as there isnt more than a 10-15% difference in-between cylinders then your good

 

[rocko5845]

thats good. as long as there isnt more than a 10-15% difference in-between cylinders then your good

Surprisingly there was no difference at all. They all hit 120psi on the dot. Made me smile since its my first Honda build.