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rossiz

Strange whirring noise from engine...

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An experienced Z guy and a good tune up does wonders. Sounds like a good day!

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Congratulations Geoff How many times did you pinch yourself just to make sure it wasn't a dream? Assuming your Z is now running great, as the burn-out would indicate, two questions remain #1 Is it going to be your daily driver? & #2 Will your daughter ever trust it or want to be seen in it again? Enjoy this next week, Temp. near 80 Wed. Perfect Z weather in the NW.

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Blue's telecomm company's going to see the correlation of broken down systems and broken down Zs soon.

:laugh: Very nice. I can picture him packing:

"Let's see... Got directions to customer site, boarding pass, toothpaste, underwear, list of Z owners in the area..."

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The pleasure was mine. Geoffrey is a mechanic and fabricator extraordinaire so it was e-z-p-z...I just had to show how to do one valve adjust then he did all the rest in a blink of an eye. Mr Obvious I hope you and Geoffrey get to talk as you two have similar genius-ous ways and ideas... knowing you both it would probably be telepathic mind meld LOL.

Geoff's car sure looks nice. A great rich metallic green with shiny chrome spoke wheels and one of the nicest and quietest interiors with way-cool creature comforts that would make the car very desirable on Canadian winter mornings.

I was so used to working on 240s that it took a while to remember some of the classic 280z EFI snags but when we dug in, they popped up: corroded connections, AFM slightly off the mark, vacuum line re-routes, TVS a wee bit off, and timing a little advanced. Doing the checks then bringing everything into the sweet spots one at a time with enjoyable test drives to break up the wrenching was fun and a nice way to break up travel, work and hotel life. I was disappointed with myself on our next to last test drive as Geoff said it was still missing a little . Up to that point I did not bother with the timing apart from showing TDC to Geoff as he set the idle with an adjustable advance timing light to 17BTD. (as it seemed like it should have been ok, but, I did not want to leave with Geoff disappointed so I checked..... it was hitting 44 @ ~ 3000 rpm so I removed the vacuum advance and retarded it to ~ 13BTDC with full advance hitting ~ 36BTDC. Wow, Geoff took the wheel and said the car got its Mojo back. When I was not expecting it, he hit punched it in first and my legs lifted off the floor (torque + Washington slope effect :) Yup... mojo was back.

There was a whistling under-load ~ 3000rpm however Geoff's great detective skills found a hairline crack in the EGR pipe and also thought it could also be a bolt in the exhaust flow.

Pretty, peppy and comfortable car, nice owner, nice family, nice location nice day. BIG THANKS!

Edited by Blue

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BTW we discovered that there is a 10psi difference between using a compression tester with a rubber hose attachment vs. using the straight pipe attachment. This may be good news for those of us with lower readings and the rubber hose testers which seem to stretch. Geoff's even had steel braid but still a 10psi difference.

Edited by Blue

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My mind to your mind... my thoughts to your thoughts... :bulb:

Geoffrey and Blue, Can you guys picture today's hair brained projects?

Geoff's car sure looks nice. A great rich metallic green with shiny chrome spoke wheels and one of the nicest and quietest interiors with way-cool creature comforts that would make the car very desirable on Canadian winter mornings.

Forgot... How about some detail on those way-cool comforts?

And I've got a long history with green Zs. I wish my current one was a deep green...

Edited by Captain Obvious

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@ blue: aw shucks...

@ zeros: anytime.

@ obvious: i will be in philly for my nephew's graduation in a couple of weeks - coffee??

@ mark: DD for sure - and my daughter is coming around... the cool factor is slowly winning over the "adventure" aspect (read as: we may need to walk home)

@ cone: small children and woodland creatures beware - the z is on the prowl.

creature comforts are pretty basic - put in a set of seat heaters when i re-upholstered the seats, a ton of sound mat in the floor/roof + mass-back carpet to keep it quiet, and a decent little stereo. just trying to civilize the DD as much as possible to maximize the "jekyll & hyde" effect :)

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We then sorted the distributor timing, revised some mis-matched vacuum lines, tuned the AFM, adjusted the BCDD setpoints,

Congratulations on all of your hard work. Finished just in time to have a sweet summer!!!

Not that I am being lazy, but are there any particular pieces of advice on these tasks? In all of the years I have had these cars, I have often appreciated others techniques (especially since I am always missing something). I am also keenly interested in the BCDD setpoints. I think that the BCDD issue has been long neglected in the forum. I have been hesitant about messing with the AFM also but this is encouraging me...

Great Work!

Edited by ZCurves

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the bcdd is pretty simple - the cover pops off and you will see the contacts. the housing has 2 screws in slotted holes, so you can loosen the screws and twist the housing back/forth to adjust exactly when the little plastic cam profile opens/closes the contacts. set the revs to ~1200 and twist/adjust until the off-idle contacts just open. the wot adjustment is locked to the plastic cam profile, so it's really just the off-idle adjustment that needs done.

oh, and i forgot a few other "creature comforts" - i wired a usb port in the ashtray (perfect place to hold the iphone) and an aux input for the stereo in the center blank-off plate between the seatbelt light and the flasher light.

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Geoffrey, I really like your ride, and I think it's great Blue dropped in to help you get it straight! Wow, what a great community, eh?! Let's hope the whirring/whistling doesn't amount to anything. I would mark it up to "cobwebs."

Now I think I'd tell your daughter she can't ride shotgun, because she only brings your car bad luck.

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i will be in philly for my nephew's graduation in a couple of weeks - coffee??

Absolutely. PM me some details and timing and I'll make sure the schedule is cleared.

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