rb25det questions

[mn03]

hey guys. compression test was carried out on my rb25det. 110 allround besides cylinder 3 which read 65. 

the car has the standard bolt ons ( full exhaust, fmic) and has a garrett t04. standard ecu. 

now the question is, will it be ok if i run the same turbo on a second hand rb25det. will be kept on 7psi. 

will be planning on gettinn it tuned sometime next year. 

 

basically wana know if its safe to run a bigger turbo on a standard motor with standard ecu on lowboost till i can get it tuned? 

[marni]

Damn son my RB25DET has 140 comp across the board 

[mn03]

yeah hahah. car went in for a compression test. saw abit of white smoke coming out the exhaust. was hoping it was valve seals. ended up with bigger problems 

[Duncan]

mate either they did the test wrong, or your motor is f**ked.

 

does it run OK normally?

 

[iruvyouskyrine]

I wouldn't worry about getting your car tuned, if compression test is accurate then you are throwing money in the bin, going to need a new engine anyway.

[iruvyouskyrine]

5 hours ago, marni said:

Damn son my RB25DET has 140 comp across the board 

140 is low too, unless you are running non standard cams or your timing is wack

[marni]

Yea rebuilt motor with issues haha

[mn03]

cars getting a new second hand motor put in. can i still run the t04 on a standard ecu till i get it tuned later on? 

[Ben C34]

No

[Duncan]

I think I understand better now. You had a t04e on a motor with a standard ECU, then the compression test showed it was broken, and now you are trying to work out if you should put that turbo back on the new motor with the standard ECU?

The simple answer is anything change to a turbo will need a tunable computer. Hell, just changing the boost on a standard turbo will need something. You need to address the ECU if you are determined to keep that turbo.