Ok So I searched and got toaly fed up with the results so I thought I would ask...

Is there any performance gain in adding a custom cold air intake?

I have a stock 12a, I plan to add RB exhaust system, and an electric fan. Now as far as the cold air is concerned. This setup would be an adaptation to the existing air brather on a stock Nikki carb. Is there any advantage to taking the time and doing this. I have 24-7 access to a full sheet metal shop and I plan on building all parts to this set up "new" and just want to make sure that there is an actual functional increase in performance.

Any input would be appreciated. If I decide to go throught with it I will document the whole thing with pictures and text.

Thanks in advance

Anthrax

 

bump

 

There will be no significant performance gain on a stock 12A.

While the car is moving the temperature diference is minimal between external air and air flowing through the engine bay into the carb intake at 300+cfm.

I have measured it accurately using electronic temperature instruments and found even in the best case scenario a 'cold-air' intake would have less than a 1/2 hp difference. It only becomes marginally important when there is also a front mounted large turbo intercooler and oil cooler warming up the air flow through the engine bay.

Adding an electric fan will have two impacts, first a rwhp gain of some one hp from mechanical drag and as it will be pulling more air, the minimal impact of temperature drop will be further reduced.

In summary there is no actual functional increase in performance.

A cold air intake just looks cool.

Another question is whether a larger reducing throat intake will give a ram impact to increase intake pressure. In theory it should work but again the impact is smaller than the inaccuracies of the measuring instrumentation.

 

Cool thanks man...

I appreciate the input big time. I think I'll just leve it alone then and spend my time and money on a steet port or a new Carb

Woo Hoo 100th post!!!