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  1. Replies
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    1,402

    The o-ring is close to the outside of the...

    The o-ring is close to the outside of the manifold so the porting does not effect things. Here is a photo of the RTV smear in the notch I'm referring to.

    63601

    Not the neatest job of applying...
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    A quick update on my Mikuni issue. I ended up...

    A quick update on my Mikuni issue. I ended up having a small set of vacuum leaks around my carb/manifold o-rings. The o-ring comes quite close to the edge of the outside surface of the canon...
  3. Replies
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    6,385

    I'm using the stock timing curve because I using...

    I'm using the stock timing curve because I using this setup on my track car which lives it life between 3000 and 7500 RPM. Solid, stead and reliable 34 of maximum advance is all I care about. If...
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    6,385

    I recently swapped out my Mallory distributor for...

    I recently swapped out my Mallory distributor for a rebuilt stock dizzy from a 1976 280Z. The stock 1976 unit can be used to directly trigger the magnetic pickup on a MSD box. I've thus far been...
  5. Replies
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    1,402

    I checked the valve lash a couple of months ago....

    I checked the valve lash a couple of months ago. All was good no adjustment needed. AFR is in the 11's at idle. I can't drive the car right now as I took the rear stub axel off this morning to...
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    1,402

    I checked the float levels by removing a jet...

    I checked the float levels by removing a jet block from each carb. The float levels look normal and even between carbs. I would also expect that if the floats were to blame that pairs of cylinders...
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    1,402

    I've tried flowing propane, carb cleaner and...

    I've tried flowing propane, carb cleaner and water around the flanges with the engine running to no effect. I'm not sure how to find the leaks.
  8. Replies
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    1,402

    I re-tightened the manifold/exhaust bolts last...

    I re-tightened the manifold/exhaust bolts last night to no effect. Last night the car was backfiring though 1, 4 and 6. This morning I removed the manifold and exhaust and replaced the gasket with...
  9. Replies
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    1,402

    I opened up the float chamber to adjust the...

    I opened up the float chamber to adjust the floats. I used new gaskets when I reassembled them.
  10. Replies
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    1,402

    Yes and I replaced the o rings with new. The...

    Yes and I replaced the o rings with new.

    The previous owner had done a hack job on the carb side of the intake. The head side is still stock dimensions.

    This is a photo from before porting...
  11. Replies
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    1,402

    I took the carbs off the intake, the intake off...

    I took the carbs off the intake, the intake off the head and I took the top off the float chamber. I smoothed out the transition from the carbs to the manifold. I did not do anything with the head...
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    Backfiring out of multiple carb throats. I'll...

    Backfiring out of multiple carb throats. I'll have to double check to see if I left some parts on the bench. ;)
  13. Replies
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    1,402

    Why are my mikuni's backfiring?

    I took my Mikuni 44's apart this weekend to gasket match the cannon intake. The car now backfires quite badly out of both the carbs and the tailpipe while idling, downshifting and cruising. The...
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    477

    I run a BRUTE POWER / PERFECTION CLUTCH 92016B...

    I run a BRUTE POWER / PERFECTION CLUTCH 92016B clutch in both my cars. Cheap and indestructible. I've got +6000 track miles on my Rebello powered track car and it's still going strong. I paid less...
  15. Replies
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    If you are running a 6AL I would switch to a...

    If you are running a 6AL I would switch to a stock dizzy out of a 1976 280Z and use it to trigger the magnetic pickup input of the 6AL. I recently switched away from the Unilite to this setup and...
  16. Could you make some sort of offset male/female...

    Could you make some sort of offset male/female threaded standoff for the linkage holes? Kinda like this one...

    McMaster-Carr

    but the female end would be offset slightly. This would allow you...
  17. I'm in the process of installing BadDog frame...

    I'm in the process of installing BadDog frame rails on my 240Z. Since these are new metal I assume I should seam seal around the edges drill drain holes in the bottoms, prep and paint the outside...
  18. Here is a photo of the shaft with the broken...

    Here is a photo of the shaft with the broken piece balancing on top. This photo was taken as it would be in the engine looking down at the distributor end.

    60653

    The shaft turns counter...
  19. The twist direction is what you would expect if...

    The twist direction is what you would expect if you held the top of the distributor end stationary and twisted the shaft counter clockwise (looking down from the distributor end).

    When I first...
  20. I agree that there are some significant forces at...

    I agree that there are some significant forces at play to twist the shaft tab and I would like to find the root cause and avoid it in the future.

    I could be wrong but I don't see how the oil pump...
  21. I considered moving to an electronic ignition but...

    I considered moving to an electronic ignition but Dave Rebello talked me out of it. He convinced me to go with the magnetic pickup distributor out of a 1975-6 280Z to trigger the MSD 6AL that I...
  22. I spoke to Mallory. They said that they have not...

    I spoke to Mallory. They said that they have not heard of issues like this with the advance tabs. The distributor is out of warrantee so if I want it fixed I will have to ship it to them and pay...
  23. Blue, I could be wrong but I think the advance...

    Blue, I could be wrong but I think the advance tabs inside the distributor broke off and locked it up which caused the shaft to break. It was difficult to turn the distributor rotor by hand after I...
  24. Mallory distributor sheared my oil pump drive

    My car stalled in the pits while at the track this weekend. When I starting taking things apart to figure out the cause I was very surprised to find that the oil pump shaft was sheared at the...
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    I’m not sure which sanctioning bodies allow strut...

    I’m not sure which sanctioning bodies allow strut tower braces. I know that the NASA and SCCA rules are readily available on the web. I suggest that you make a list of who you specifically want to...
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