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-   -   Timing for first start after rebuild (http://forums.pelicanparts.com/porsche-911-technical-forum/1130799-timing-first-start-after-rebuild.html)

The Watson 12-01-2022 10:32 AM

Timing for first start after rebuild
 
Hi folks,

About ready to start up my rebuilt '77. I am trying to determine the timing I should be looking for at idle. I won't be able to check the total advance timing until I can hit the higher 6,000 rpm revs after breaking the engine in. Specs for the rebuild are:

2.8L using JE 9.5 compression pistons
MSD box w/MSD Blaster Coil
Pertronix Ignitor in dizzy
Cam reground to "E" profile
PMO 40 carbs

The original "E" cars called for 5 degrees ATDC at 900 rpm. The stock 1977 2.7 engine with CIS called for TDC +/- 2 degrees.

What would you recommend given my mods for a starting idle timing?


http://forums.pelicanparts.com/uploa...1669923039.jpg

john walker's workshop 12-01-2022 10:59 AM

TDC is good.

The Watson 12-01-2022 11:01 AM

Thanks - great to have a quick response from a known legit authority!!

john walker's workshop 12-01-2022 12:06 PM

It may end up at +5 or more, depending what you decide for total advance.


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