so the a12GX twin su will be perfect for my a15? If i managed to get another a12gx, i'll keep the twin su and only sell the rest..

You might need to raise the needle a full turn. Try it at half turns and see

Best to replace the L-series needle with A-series needle, and A-series spring. I've heard that AFT is similar in viscosity to the recommended oil

Thanks. Those are believed to be Performance Spitfire.
But with only stamp 'made in Australia'
13x7"

Yes its L carburetor with ATF as damper oil

Nice photos. What brand are your wheels?


Quote:Sounds like it might be bogging down. I would use the recommended 20W or 10W-30 engine oil in the carburetors

Are they L-series carburetors? If so the needle jet might be too rich, you can try raising the needle by turning the idle adjusting nut in 1/2 turn. Just going from sea level to high elevation will make the carburetor run poorly but a quick adjustment along the way will fix it

1st trip to Genting Highland, Malaysia(1740 meter) with my datsun. I can say it was an effortless steady hill climbing. should i thank the 4.11 diff?

On the other hand, there is no sudden acceleration if i floor the gas pedal. But better result if i slowly press the pedal along with the engine rev.
Does it mean i need a thicker SU damper oil?

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If the pipe is bigger than needed, you'll lose a few HP, but it will still run OK. On the plus side it will sound tougher

You can use any manifold you wish: 4-into-1, 4-into-2-into-1, whatever. To be as quiet as possible while maintain the power, I recommend the factory 4-2-1 cast manifold instead of a thin-wall tubular extractor. It will be much quieter while giving same power as un-tuned extractors

You can use any muffler you want, with single or dual outlet. To be as quiet as possible while maintain the power, use a larger-than-stock conventional muffler. Most performance mufflers are noisy, and do not outperform larger mufflers

how about the dual outlet muffler?

thanks mate!!!

I need to check my pipe diameter. doubt it is 2". if its bigger than 1.75", what will be the issue? can i keep the 4-1 extractor manifold?

Finally! A good photo of the fuse box. Thank you

For quiet and free-flowing, use a B310 GX type exhaust
* Front resonator achieves high-RPM tuning length
* Rear muffler further quiets it down. Use the largest conventional type muffler that will fit under the car
* Use 1.75" pipe (good for 108hp) instead of stock 1.5" pipe (good for 80hp)
* Use mandrel bends to preserve free flow

Hi. A15 twin SU, 4-1, extractor

What is the best exhaust setup for my b310.
I want the car to be as quiet as possible while maintain the power(or increase)