350i /1987

[tcpc]

hi,
can anyone tell me what the avearge engine compression should be when doing a test on a 3.5L
thankyou

tony

>>> Edited by tcpc on Monday 17th February 21:42

[tcpc]

i was hoping someone would have a comment


well iv'e done the test and all cylinders are all around 152 to 160 psi


tony

[danny hoffman]

I have never checked mine, but the important thing is they are all within 10% of each other. Sounds like yours is fine.

[tcpc]

thanks for your reply Danny hoffman

[york33]

Not got TVR specific figure but various info on the 3.5 Rover V8 in general seem to average out at 130psi. Quite poss that TVR raised compression a bit I guess, but don't quote me I'll deny it :-) Anyways, would say that 150psi sounds good to me as long as they're all similar.

[montegogt]

As long as all 8 are firing up, who cares...

[wedg1e]

Sorry tcpc, I meant to reply to this a couple of days ago!
I rebuilt my V8 (now 3948cc, i.e. a 400 engine) last spring, so I'm fairly sure everything is in good shape. I've done a couple of compression tests but the only figures I can find are (June 2002):

#1: 178 #2: 164

#3: 172 #4: 164

#5: 170 #6: 170

#7: 165 #8: 178

Any help?
I don't think the capacity difference would be relevant.

Ian

[tcpc]

thanks all for the info

tony