Chilled fuel and air

[Pete]

..Next you will be trying to get the emissions down

Good to see people trying different things, different strokes and all that.

I think a stroked big block with twin turbos is the way to go.................

[Dave-R]

dave ... ice isn`t low enough temp to start with

Dry ice I said!

Dry ice turns into gas at -56C but as a solid it is usually at a much lower temp.

[Jon Connolly]

Dry ice is fine

Can you nick me some from your university ?

[Jon Connolly]

Here`s my mark 1 prototype

Each side holds approx 4 litres of petrol, I have built it tall and thin so there is maximum surface area to transfer heat. Each chamber is contact cooled via the tank walls with 2 cooling coils - 4 total. co2 is fed down each cooling coil and the whole lot insulated.

Cold petrol is drawn off the bottom of each tank before going through a second plate heat exchanger near the carb

Whole lot adds about 3 kg which i can live with

[Kev]

...alternatively, use a bigger engine

Always the comedian, eh? (Or voice of reason ) But not the fun route! Lots of iceboxes over here but the 'fridge way looks cool! ( )

[Anonymous]

Good to see different things being tried out for the 'need for speed'.

I can see lowering fuel/air temps will increase oxygen content due to the supply of air being more dense , how much it will pick up down track will depend on ignition timing changes , i'd imagine you'll have to advance ignition timing to compensate for the cooler charge , depending on how much advance is needed 'may' offset the expected power gain , the more spark lead an engine needs the less efficient it becomes ,the CO2 system you're using won't increase the oxygen content of air , so burn speed will be slower , the slower the burn the less power will be had hence the need for increasing spark lead............nitrous makes soooo much power due to 33% oxygen content compared to 20% for air , not sure how this CO2 will stack up when spraying nitrous? , if manifold temps drop to low when on the bottle atomisation of the fuel 'may' be an issue , not an issue with the nitrous due to bottle pressure atomising the fuel jet...................just slinging some ideas out not trying to rain on you're parade.

[Jon Connolly]

All good stuff Brutus

If you don`t try you don`t learn

I haven`t got a huge research budget so it is all a bit homemade trying different things.

As ever it will be a trade off between timing / temperature / jetting / fuel quantity etc

All I can say is I`ve been using it and it works ... the only way of prooving it is back to back runs on ambient vs chilled fuel on the same day in the same car

Don`t forget the co2 does not come in direct contact with the fuel or the air so the engine is getting the same fuels with no chance of air or fuel cross contamination.

Nitrous is itself a refrigerant which cools the air by 50 / 60 f allowing it to carry more oxygen. Cold petrol alone has a similar effect. The 2 together is equivalent to a larger Bananarama! that will require more timing compensation

If it runs a 12 then goes bang, give it a miss

[Anonymous]

Good luck Jon ..............................larger bottle hits impair booster signal , might pick up some with a smaller carb. ...........ok gonna stop now.

[Les Szabo]

...alternatively, use a bigger engine

You've done it again Pete, like your sense of humour man

On more serious note, don't you think a "weather station" would help you more.