RB20 compression test

[Chris32]

I am looking at buying a used motor, the results of a compression test were

155,155,160,160,155, 160

Is this good?

What should they be?

A quick reply will be helpful

regards, Chris

[Freebaggin]

I am looking at buying a used motor, the results of a compression test were

155,155,160,160,155, 160

Is this good?

What should they be?

A quick reply will be helpful

regards, Chris

Good to me, I remeber I did my RB25 when I first bought it and was 148 all round. I'm no expert but 155 vs 160 is only a 3% difference and probably within reasonble measurement error ????

[Chris32]

Good to me, I remeber I did my RB25 when I first bought it and was 148 all round.  I'm no expert but 155 vs 160 is only a 3% difference and probably within reasonble measurement error ????

Yeah, i reckon it sounds all right, anyone else?

[meggala]

sounds fine 160 is good and a small variance is acceptable get it and you should be fien provided you found the problem that casued your inital failure.

meggala

[Chris32]

sounds fine 160 is good and  a small variance is acceptable get it and you should be fien provided you found the problem that casued your inital failure.

meggala

Cool, cheers for that

My motor is still going strong, so no failure, just want another motor to play with

Chris

[Col-GTSX]

yeah as long as there not like my old motor...

160,160,160,160,150,75 ...... LOL

The rattle of the piston sideways in the block was a dead give away tho.... LOL

[Freebaggin]

sounds fine 160 is good and  a small variance is acceptable get it and you should be fien provided you found the problem that casued your inital failure.

meggala

His initial failure is trying to keep up with us RB25 boys :devfu:

[Chris32]

His initial failure is trying to keep up with us RB25 boys :devfu:

yeah, will give you that mate :uh-huh: - maybe I should drop a RB25 in

RB20 will do me for now, hopefully some cams and head work with the new motor maybe? If the bottom end is in good condition, it will stay as is, 230rwkw for a RB20 with decent injectors etc should be no problem

Hopefully I can serve up a bit of a to you and greg once its all together, but we'll see If I can run a 12 I will be stoked

[maxim]

Hey guys, don't mean to steal your post but what is a good measure for a RB25 turbo? thanks

[Chris32]

Hey guys, don't mean to steal your post but what is a good measure for a RB25 turbo? thanks

Freebaggins RB25 was 148psi all round, that was a few years ago and its making around 265rwkw now, so it is still in good shape