Venturii Exhaust Assist - Works (g-tech)

[newxr]

Hi All

A few weeks ago I suggested a Venturii Exhaust Assist device - essentially an air sccop under the car that passes air through a narrow tube to increase its speed and then the fast airflow is directed behind the tail pipe to reduce the pressure behind the tail pipe to assist exhaust evacuation.

Well I built and mounted one and tested it using my G-TECH

3 Runs without the device - mean 138.6kw (best run = 139.4kw)

2 Runs with device - mean 144.5kw (both runs over 143kw)

All runs within 1 hour of each other on the same track

[Mercurial]

Looks like it works mate. Congratulations.

Would this basically have the same effect as putting a larger exhaust on? (And therefore be potentially a cheaper alternative for the same performance gains??)

[Paradoxx]

So it basically creates an area of low air pressure directly behind the tailpipe and hence causing the high pressure air in the exhaust (hot air) to escape more quickly lowering the high speed back pressure created by the exhast... is that how it's working?

Very interesting concept...

Edited 12/05/05 06:04 AM by XXXR6T

[newxr]

  XXXR6T said:

So it basically creates an area of low air pressure directly behind the tailpipe and hence causing the high pressure air in the exhaust (hot air) to escape more quickly lowering the high speed back pressure created by the exhast... is that how it's working?

Very interesting concept...

<{POST_SNAPBACK}>

The exhaust is normally of lower pressure than the atmosphere however it can escape due to its speed however by lowering the resistance behind the tail pipe this just helps it along.

My set up has a 3.5" intake with a 1.5" exit so at 60km/h the air is exiting the device at over 240km/h and significantly reducing the presuure behind the tailpipe. Older F1 cars had the exhaust pointing down as the air rushing below the car reduced the pressure and the exhaust flow was improved.

[F6 UTE]

what did the g-tech say about ET improvements??

Do u drive around with it hanging out the back of the car all the time??

[jetute]

Well done for a great effort.... I must say that although it seems to work, it does look gay!!!

Its great to see forum members become pioneers and invent/try new things though... again, well done for a super, although gay looking effort

[YOOT]

I could use a third tail pipe. All good things come in threes.

[eMPee]

So why dont cars now have their exhaust's pointing downwards?

Can it work from the tail pipe that was bent down that wasin fashion a few years back work?

interesting.......

[Paradoxx]

Ahhh I see

I can't imagine it would make any difference to your ET since the car isnt moving and therefore no flowing air.

[Trough Lolly]

so the VL Turbo boys were on the right track with downwards dump-pipes? lol...