I seen a bit around about water injection to control intake air temperature - and it working as well as an intercooler.

It's on a B310 race car....trying to remember who's race car. (It's a member of this forum) the while Sunny.

it's on that fj20 rallycar. yeah water injection would work, way cheaper than all that intercooler piping, would make it more responsive and lighter and less complicated.

I suppose a propane injector that fogged in liquid lpg would cool things down nicely and richen the mixture a little. lpg expands 270 times when it reaches room temp and pressure. Maybe spray a very tiny bit of n2o ;)

Engine Combustion Theory / Alternative fuels reading

here's some reading for interested people. ( talks about lots of combustion theory, useful no matter what fuel you use )

I'm dreaming of a nice blowthrough non intercooled setup, it's not going to make a 'beast' but I don't think you'll be getting in front of me getting on the highway.

Turbos and LPG work very well together my previous car pic is below:




Yes I know it's a gemini but it was straight LPG and was about 7.5:1 comp ( yes a little low for some) but due to the slower burn rate of LPG you don't hurt pistons as easily, so this car had cast pistons O'ringed block standard head modified EFI manifold to fit the 350 CFM GRA Gas carbi and a low comp 1.6 litre, it had a modified dissy no vacum adv just mechanical and softer springs so it would advance earlier and a gas camshaft. It used to pump out about 200 RWHP and got it's best economy at about 120 km's with light throttle and the turbo just spooled up at about 3000 rpm. it would do about 400 kms on 50 litres on LPG. (65 litre tank)

just more info for you. this car was built for a daily round trip of 110 kms for commuting to work. all country driving ;)

direct liquid injection has been trialed by a few companies here but they have never released a product because the metering is so difficult due to the presure differences between a full tank and an empty tank.

Cheers

there's a few companies that make the direct liquid injection systems, I guess they figured a way to resolve the pressure issue. maybe they regulate it down to a low pressure in a 2 stage regulator and spray it at a lower pressure that can always be delivered.

overall high compression and lpg are good. however you get there.

"As you know an engine is nothing more than a big air pump"


So are people!!!!!!!!!!!!!!!!

^^^ I'd say your V/E is approaching 50% ^^^