home made spiral air intake

[JUNAID786]

Hey guys

Im so thrilled with the result I have gotten with my home made intake that I had to post this up here.

Firstly, its 100mm inlet that’s twice the size of the stock 50mm. I heat shielded the inlet with ssn coupling.

I used a heater hose for the crankcase breather system. Drilled a small hole in for the vacuum line of the fuel pressure regulator.

I draped a piece of cloth folded twice over the airflow meter and the clamp of the pvc flex pipe holds it in place

Ok, so there has been much debate on the benefit of those spiral intake jobbies.

Well I know for a fact that spiral air intake works coz my previous Mercedes 190e had a spiral shaped intake tract.

Those aftermarket ones have been known to be a restriction. So I cured that by not placing it in the intake path but rather giving it a separate intake path.

So the total intake are is closer to 150mm. and the spiral effect works like a small supercharger( at highway speeds) I have also noticed that I require much less foot on the throttle to get the car up to speed and to maintain speeds. This was all great when the engine was cold and the mixture was rich.

But with the engine properly warmed up, the car was pinging like crazy from a lean mixture. 1/8 turn on the fuel distributor and still going lean at high rpm. Turned it another 1/8 turn and have yet to test it.

Parts used
- 110mm flex pipe( pvc plumbing type)
- Black duct tape
- Simota spiral intake
- Ssn coupling with 2 clamps(127mm)
- Heater hose
- Multi purpose cloth

The entire job cost me about R 300( $42)