Lets talk tune ups

Post by **GahannaKid** » Sat Nov 28, 2009 10:23 am

Specifically what should the gaps be set to on the intake & exhaust side and how many of you are running synthetic & what weight?

Post by **seang** » Sat Nov 28, 2009 5:48 pm

Unless you got some crazy powerful setup with a s***load of fuel to ignite, than stock gap is probably the best. Some plugs (like Bosch platinum x4) aren't able to be gapped.

Exceptions to spark plugs is beyond me. IDK when it's appropriate to stray from stock specs. So I just stay stock because my motor's stock.

Even though Platinum plugs last a long time, it's good to periodically pull them just to read them and check the gap. After 2 years of running, the gaps on my two center plugs were .010 too large. I'm glad I re gapped them : )

I think 10w30 is the best oil for the naps-z. I used to run 10w40 when I first had my naps-z because it was a "truck" motor, but that was a bunch of BS.

I think you can run 5w30 if it's cold enough, or even straight 30 if it's warm all the time. Most people just stick with the 10w30 because it's available everywhere.

There is an oil chart in the service manual.

Post by **PEZi** » Sat Nov 28, 2009 6:09 pm

i use pulstar pulse plugs gapped to .038 i believe... and AMSOIL 100% Synthetic 5W-30

Post by **seang** » Sat Nov 28, 2009 8:53 pm

5w30 and 10w30 are supposed to have the same viscosities at operating temp (30 weight). I'm not sure what temp exactly (I think it's around 190 farenheight). Pezi might know it.

Post by **PEZi** » Sat Nov 28, 2009 10:25 pm

the oil gets thicker as it warms basically... at what temp it reaches full weight i don't know... but considering some engines operate at 180 it much be at least decently before that

Post by **GahannaKid** » Sun Nov 29, 2009 3:47 am

I don't have the owners manual or any other paperwork with this vehicle which is why I asked here. Is the gap the same on both sides?

Post by **breadbox** » Sun Nov 29, 2009 4:23 am

got it.

1980= 0.039" - 0.043" (1.0-1.1mm)

1981-1989 z24= 0.031"-0.035" (0.8 -0.9mm)

If you need outside of those years or for the v6 let me know.

Post by **PEZi** » Sun Nov 29, 2009 4:07 pm

GahannaKid wrote:Is the gap the same on both sides?

yes... but the plug depending on which ones you run are different from side to side

Post by **breadbox** » Mon Nov 30, 2009 3:56 am

I can give you the plug numbers too.

1980 us Standard plug BP6ES-11 (canadian BP6ES)

1981-1985 Intake BPRS6ES Exhaust BPRS5ES

1986-1989 four cyl. BPRS5ES 6 cyl. BPRS5ES-11

Post by **GahannaKid** » Mon Nov 30, 2009 5:57 am

Good deal, thanks for the info.

Post by **flinterman2000** » Mon Nov 30, 2009 8:56 am

breadbox wrote:I can give you the plug numbers too.

1980 us Standard plug BP6ES-11 (canadian BP6ES)

1981-1985 Intake BPRS6ES Exhaust BPRS5ES

1986-1989 four cyl. BPRS5ES 6 cyl. BPRS5ES-11

What is the reason for the different heated plugs? I thought one type would be beat for the engine.

Post by **seang** » Mon Nov 30, 2009 9:48 am

flinterman2000 wrote:
What is the reason for the different heated plugs? I thought one type would be best for the engine.

IDK either. One theroy of mine is that by the time the flame front reaches the other side of the combustion chamber, it's partially burned. So the other plug is of a different heat range.

When I replaced the plugs in my old z24i with Bosch Platinums, they were the same heat range for both sides.

Post by **PEZi** » Mon Nov 30, 2009 11:20 am

i run the same heat plug on both sides....

Post by **flinterman2000** » Wed Dec 02, 2009 4:31 am

When I bought the Z20 I installed in my galant supersaloon it came used with BPR5ES both sides. The Z18ET I recently carries BPR6ES-11 both sides. Of course I can't verify the year of manufacture so I can't say if it's correct.

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