'68 SPL311 Timing question

VonMussa · Post by **VonMussa** » Mon Oct 07, 2019 1:53 pm

New to working on cars, limited to no previous knowledge. Trying to trouble shoot my engine. I see that the '68 SPL311 timing is set at 16degrees BTDC at 600rpm, and this is adjusted by rotating the distributor. The closest I can get is about right at 15. The distributor can not be rotated more. Is there something else I should look at, or is this ok?

Matt

Post by **2mAn** » Mon Oct 07, 2019 2:08 pm

Theres a second adjustment nut to rotate it a little more

SLOroadster · Post by **SLOroadster** » Mon Oct 07, 2019 2:26 pm

There could be two issues going on. Either the plate with the pointer needs to be rotated, or if its fully rotated, the distributor needs to be pulled, the stand needs to be pulled, and the drive gear needs to advance 1 tooth. (If this is the case you will need to rotate the pointer plate back, and readjust everything.

Will

Nissanman · Post by **Nissanman** » Mon Oct 07, 2019 7:26 pm

You can see P/N 22 has two screw clamps: one is P/N 23,24 and the other is adjacent the pointer on the plate.
I set the rear clamp when the distributor is timed at ~16deg advance and use the pointer clamp to fine tune the advance as the engine and fuel will require.

VonMussa · Post by **VonMussa** » Mon Oct 07, 2019 8:03 pm

Iâ€™m correct on my timing numbers though? I pulled them from a Chiltons manual (which covers all datsuns from 62-71 or something). Using numbers for e-code engine (which I think is correct).

Also I appreciate that diagram. That really helps.

Nissanman · Post by **Nissanman** » Mon Oct 07, 2019 8:22 pm

Yes 16deg BTDC is correct. I'm, by coincidence, going through this exact exercise atm.
I'm setting up the timing with engine off to fire at ~16deg BTDC.
Clamping the pointer plate so that the pointer is at the 0 mark.
Then further adjustments are made using the front screw and adjusting the pointer to A or R as required.
Usually, you can advance the timing quite a lot depending on the fuel you are using.

redroadster · Post by **redroadster** » Mon Oct 07, 2019 9:47 pm

Keep in mind that was with 96 to 98-99 octane gas back in the day, 91 is the best here now

Nissanman · Post by **Nissanman** » Mon Oct 07, 2019 9:49 pm

I use 98RON here in Oz, the car doesn't like the 91 or 95 that we can also get

redroadster · Post by **redroadster** » Tue Oct 08, 2019 12:47 am

Nissanman wrote: ↑Mon Oct 07, 2019 9:49 pm I use 98RON here in Oz, the car doesn't like the 91 or 95 that we can also get

How $$ for 98 ?

Nissanman · Post by **Nissanman** » Tue Oct 08, 2019 1:15 am

Hehehehehehe!
Depends on who is bombing who and where

Anywhere from $1.50 to $1.75AUD per litre

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'68 SPL311 Timing question

'68 SPL311 Timing question

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