I would appreciate opinions on optimum IDI build, all fantasies welcome.

[opusd2]

Bfe- Bum **** Egypt, or rather Birnamwood.

A snow bird, huh? Better break the turn signal lever off after putting it in the left position.

 

[marmot]

Quigley ambulance,

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they had a bunch around here in the 90's dont see them any more

 

[BDCarrillo]

125* ambient is still lower than the air charge temp coming straight out of a turbo. I do know that the overall efficiency will be slightly lower with higher ambient temps.

I'd recommend testing out the intercooler with an ambient temp sensor and intake air temp sensor, right at the manifold. You'll see the efficiency of your setup and can experiment with a garden hose to see if it's worth plumbing up a whole sprayer setup and carrying extra water.

Water injection at mid-high boost may work better to drop air charge temps and boost combustion efficiency, while consuming less overall than an intercooler sprayer.

I used to do water and methanol injection on a gas drag car, and in that community intercooler sprayers were proven to be nearly ineffective.

 

[Trashnomancer]

Great answer BDCarrillo, I can easily understand that. I had no idea turbos upped the heat values that much. It makes a lot of sense that the evaporation cooler would be of fairly limited use. How does water and/or menthol injection effect longevity of the engine?

I am not so sure the hose idea would prove much as the water temp itself would be effecting temps more then the evaporation in that method. I might try rigging up a temporary sprayer once I have the project rolling and do some comparative analysis then. Also were the race intercoolers using evaporative fabric films? Or were the sprayers just spraying the intercooler? It would raise the efficiency a great deal. Though likely not enough to be worth carrying the extra water. But it would be a cheap experiment.

That Quigley ambulance is a sharp looking beast. I could see liking one of those.

Ans as far as breaking the turn signal off in the left position. I feel you on that one opusd2. Great word play too. Central Wisconsin is the biggest black hole in the universe. No one ever escapes... That is why I will only be hitting Northern Wisconsin. Maybe even going through Michigan to get there just to avoid the void. I am sick of being stuck in my house. And I can't find a person here who wants what I make when I have no problem selling mad in California. Right now I send things to my friend out west to get things sold. Everyone is to "thrifty" around here to enjoy the finer things in life.

Also I need to maintain my other property so that I can have a Wisconsin residence for my FrankentruckRV.

 

[Trashnomancer]

Quick question. Where does the heat from the Turbo come from? 90some% from the exhaust gases? In that case couldn't a person turn down the housings and add ceramic spacers to divorce the three castings from each other thermally?

Ok, so three quick questions.

I will be buying a turbo-ed parts truck shortly, then I can pull my old turbo apart to take measurements.

 

[david85]

Quick question. Where does the heat from the Turbo come from? 90some% from the exhaust gases? In that case couldn't a person turn down the housings and add ceramic spacers to divorce the three castings from each other thermally?

Ok, so three quick questions.

I will be buying a turbo-ed parts truck shortly, then I can pull my old turbo apart to take measurements.

Basically, yes, its the exhaust that generates most heat in the turbo.

However the effect is magnified because the gases (both inlet and exhaust) are compressed. To control the exhaust gas temperature at the turbo, you can get a water cooled turbo. This reduces the overall temperature and also reduces the inlet temperature to your intercooler, so everything runs cooler. Another advantage of a water cooling the turbo housing is your cooldown time is reduced when to get off a heavy pull. I noticed a big difference when I swapped a conventional turbo for a water cooled unit in a diesel ranger. When combined with an intercooler, it boosted power by about 10% without changing any fuel settings. I verified the result by climbing the same 10% hill before and after the upgrade. Top speed increased from 42MPH to 49MPH. I should also add the engine was boost limited by a factory blow off valve to about 13PSI, so you don't need a lot of boost to see the benefit of charge air cooling.