Non intercooled turbo

[jamieo]

Apologies if this has already been posted…

I’m looking to boost the torque in the mid range for better road driving.I have a Corolla TSport also which is great but I would not not the 2ZZ in the MR2 unless it was for track.

My thought was a ‘simple’ non intercooled low boost turbo approach.

Does anyone have experience or advice on this.

Thanks

[benckj]

The ones I’ve seen with no IC used a water injection kit to cools temps and increase octane.

[jamieo]

Thanks for that, does that mean you have to hook up a water reservoir? Or plumb into existing cooling system?

[jimi]

You would need a separate water reservoir.

[jamieo]

Thanks

Having researched (Google) a little maybe for a low stressed drivability focused turbo then oil only is fine? That’s what I’m thinking - provided after a sustained high level output the engine can idle a little to deal with the high temps and temp transfer?

[jimi]

The water isn't to cool the turbo, it's to cool the intake air, which heats up after the turbo has compressed it. Thats what the intercooler is for, water injection is a substitute for the intercooler.
Hot intake air is less dense so gives less power when mixed with fuel, if you don't cool it you lose the gain from having the turbo.

[jamieo]

Ah, ok and understood. So I could go for a simple turbo and if necessary add an intercooler for the post turbo air.

Thanks very much for the advice

[benckj]

I’m confused, thought you were asking about alternatives to using an IC?

BTW there is no such thing as a ‘simple turbo’.

Jim

[jimi]

You don't get much simpler than one moving part

[jamieo]

Sorry about my confusing coms.

By simple I mean non-water cooled. Probably with integral wastegate. Just need to make sure the charged air does not get too hot and the BOV is upstream of the MAF.

[benckj]

You don't get much simpler than one moving part

….. Spinning at 280,000rpm and hotter than molten lava.

[jimi]

Just because its highly engineered doesn't mean it isn't simple
According to Garrett

Up to 1900 Fahrenheit
Up To 350,000 RPM

Molten lava can range in temperature from about 800 °C (1,470 °F) to 1,200 °C (2,190 °F).

[Synz]

Apologies if this has already been posted…

I’m looking to boost the torque in the mid range for better road driving.I have a Corolla TSport also which is great but I would not not the 2ZZ in the MR2 unless it was for track.

My thought was a ‘simple’ non intercooled low boost turbo approach.

Does anyone have experience or advice on this.

Thanks

Man I have read this thread three times and I'm still confused.


Intercoolers are the simplest way to get cool air into your inlet manifold from a turbo, literally pipe from the turbo to the intercooler and from the intercooler to the Inlet manifold.

Are you getting mixed up with charge coolers that use water?

If you're wanting quick acceleration you want a small frame quick spooling turbo but it won't be cheap or simple in my opinion.

You would need as a minimum:
Turbo Manifold
Turbo (internal Wastegate)
Oil feeds in and out
Intercooler and piping
Standalone ECU

[jamieo]

Thanks!

Going for water cooling to help longevity and intercooler (charge cooler) to maintain power gain.

Any ideas on ecu piggybacks and fuel injectors?