madkaw

I have had vibration issues, but my issue might be complicated by the fact that I run a BWT-5 trans from a 83 turbo. I had to fab my own mount(trans) to make things work. That itself might have changed the stock driveshaft angle. The RT mount with the GM mount does lower the diff front enough to be an issue with the stock bracket. I think for stock L6 trans I would use the urethane stop with the stock diff mount to 'sandwich' the diff to keep it from moving.

Ordered new bushings made by Prothane. Picked them because they were the cheapest available:) Nice little suprise- the urethane bushing ID has slots cut in them to help hold urethane grease. Something I considered doing anyway, but someone else thought of that too!! Looks like about 8 slots in each bushing. Now just need some time to install

Check your mechanical advance assembly for freedom of movement in the dizzy.

Here's an interesting comparison. This video is older and with SU carbs and I believe a 3.54 diff. I think it's easy to tell which video the car is running the lower gears. Also notice how nicely you can ' blip' the throttles on the Mikunis . Advantage of having carbs with accelerator pumps. - Video Tube for YouTube - iPhone/iPad

Momo LC-1 wideband O2 sensor Restricted by CA law on upgrades ?

Yes it will catch 3rd! With SU's it was 155RWHP -with Triples ?

Thought I would post up a link to my little youtube video.Just messing around with a digital camcorder and I was impressed how well it picks up sound. Specs; l24 274f cam headers and true dual exhausts lightened flywheel triple Mikuni 40's 3.90 diff Datsun 240z-triple Mikuni's STI 3.90 diff - YouTube

swimming 066 - YouTube 3.90 gears with t-5 trans you can hear and feel the difference -you will like the gears

That's why guys that upgrade the front sway bars usually put a doubler on the frame rail to prevent that.

RX-7 carbed pump Check that fuel rail

Do some continuity checks on the the power wires. Amp meter hooked up?

I would remove or blow out the fuel rail first and check the return orifice

Why would you pull the fuel tank if you are getting fuel to the carb. So you think that there is only enough fuel coming up to operate 1 carb? That doesn't seem to make sense. What About the fuel rail-have you checked it? Have you visually verified how much fuel is coming from the fuel rail?

I understand your point about the backing plate, but the design of the channel works pretty well . Yes , the weakest link is the screws, but the mirror does give(move) pretty easy if you bump into it, so it absorbs contact well. If I have the inner door panel off, I will remember your point and make a backing plate for it.

I see this is your first post- welcome. Your question is vague and you need to elaborate more for us to help you. So you have a 240z - what engine- original? You can't advance your timing enough for what? You can't make stock specs? What's your timing at now? So the vacuum advance is NOT hooked up now? How does the engine run OTHER then WOT? Idle good? Describe flat spot.

What he said^

If you were dumping fuel into the cylinders before you could have done several things. You have washed down the cylinder walls with fuel and the rings are not doing their job keeping the oil out. There's the possibility of hydraulic damaged from fuel in the cylinder also. I would turn over the motor with the plugs out for a while. I would also make sure to clean plugs well or replace oiled plugs before restarting and do compression test

And the view is spectacular !!

Sure sounds like an exhaust leak.

That is FT. Pounds

If the 83 is together, then why separate . I see no gains in going to an early intake except I like the non webbed look, but you still have an EGR. As far as the exhaust - the 77 is square port right? The 83 is round port. Not sure if that has a bearing. Could you use the O2 sensor hole to run a wideband? That would be one advantage . So you want to run the 77 intake to keep it looking original?

Happy birthday! I guess you better update your age on your profile. Cool car for 16, let us know if we can help out. Find the FSM on line and download - it will be very helpful. Welcome to CZCC

I would spend some time over at Hybridz . Love this site , but there is a thread there titled "show your wheels" or something like that. Usually the posts include sizes.

I actually have a tub of that stuff

It's more then a grease issue- unfortunately