Intercooler positioning if you're turboing a 2zz

[michaelb]

Hi guys, where is the best place to locate the intercooler if you turbo a 2zz? I know a chargecooler would probably be better but will work out more expensive.

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[dan944]

Hi guys, where is the best place to locate the intercooler if you turbo a 2zz? I know a chargecooler would probably be better but will work out more expensive.

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Probably the same location as mine I'd reckon. If I did it again I'd probably get a charge air cooler though.

Who's putting a turbo on a 2zz?

[dan944]

For reference.

[michaelb]

I am

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[michaelb]

That's an unusual spot!

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[dan944]

I am

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2zz just wasn't enough then [emoji23]

What's the plans then?  I'm not fully  in the know with 2zz turbo but thought it was ill advised because of huge air flow or something?
It was something I thought about myself tbh.

Personally I don't see anywhere else that an IC will work.
On the dyno I was getting 50 degrees highs on a 30 degree day. And that's probably the hottest an engine will ever get.
Normal driving it's not that bad tbh. About 40 degree temps on the same day driving down the motorway.

[michaelb]

I'm at the early stages, just putting some thoughts together. My mate who did the 2zz swap with me, doesn't seem to think there would be any specific issues with turboing it and he's a race tuner, but I will certainly chat to him about it. I spoke to Lee at Se7en and he even sells a kit to turbo the 2zz, so it must be fairly straightforward. I may have to consider a chargecooler though

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[dan944]

I'm at the early stages, just putting some thoughts together. My mate who did the 2zz swap with me, doesn't seem to think there would be any specific issues with turboing it and he's a race tuner, but I will certainly chat to him about it. I spoke to Lee at Se7en and he even sells a kit to turbo the 2zz, so it must be fairly straightforward. I may have to consider a chargecooler though

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It is categorically EASY to do the work.

It's just the planning. I'm sure someone here will know the crack.  I think it'll take a relatively big turbo compared to the 1zz.

[michaelb]

I had considered the supercharger but my mate reckons the engine is ripe for a turbo. He did say locating the intercooler may require some out of the box thinking though!

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[dan944]

I had considered the supercharger but my mate reckons the engine is ripe for a turbo. He did say locating the intercooler may require some out of the box thinking though!

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Hmmm. Fair one.

I wonder what the power curve would look like on that?

[michaelb]

Not sure yet lol I've stage 2 cams already installed so that should effect it too

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[105e]

I am new to mr2 roadster ownership but i know i will need more grunt, dont really want to do an engine swap on what seems a really nice car, so a turbo beckons.  Looking at it seems 3 choices,  scoop on the roof funneling air down (no dont think so),  a fan sucking air in from somewhere (just an extra thing to sort out) or a charge cooler..yeah..

[dan944]

I am new to mr2 roadster ownership but i know i will need more grunt, dont really want to do an engine swap on what seems a really nice car, so a turbo beckons.  Looking at it seems 3 choices,  scoop on the roof funneling air down (no dont think so),  a fan sucking air in from somewhere (just an extra thing to sort out) or a charge cooler..yeah..

Theres no doubt charge cooler is the best choice. But now that I've put some miles in the kit I can say that an inter cooler does work pretty well.
I only really notice the heat soak affecting performance when I've been sat in traffic on a hot day.

[michaelb]

I'll have a good think about it all!

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[Mr X]

There's no high pressure points at the back of the car to make air>air cooling ideal. As a note, you really want as little air under the car as possible (for aerodynamics) so having an IC with air fed from the underside (this will still be a low pressure area anyway) is counterproductive.
Ideally want it to be as cold as possible.
If you're after power use a charge cooler. Water to air to at the front (where a rad is in a high pressure area) using a +12v pump (on with ignition) to pull the water back to an air to water matrix somewhere around the battery area. Colder air is more dense with more oxygen within it, increases power and reduces things like det, oil temp, exhaust temp.

[dan944]

This is absolutely true. A charge cooler is for the win.
But...this has just thrown up something to me.
Not do delve into the innards, a couple of my friends were building a system to monitor the air pressure at different points on an aerofoil.
The system used a raspberry pi and some coding.
Whilst I'm in this situation I think I may employ the knowledge of some instructors and knock up an arduino with the relevant hardware to monitor and record the pressure at a given point. Then use this to get actual hard facts rather than very educated guesswork.
If I do this soon I'll let ya'll know and get any requests whilst I'm at it. I'm probably going to borrow the kit so won't have very long to use it.

[dan944]

https://www.sae.org/publications/technical-papers/content/2012-01-1044/

Interesting read. Not very long or in depth but gets the point across.

[michaelb]

That is an interesting article mate.

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[pauls0212]

TTE put theres under the gearbox

[michaelb]

I suppose you just put it where the air is coolest and avoids the heat of the engine and turbo

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[dan944]

TTE put theres under the gearbox

I honestly think TTE got it wrong [emoji23]

That's not in anyway a dig at you by the way.

When Greg was tuning mine after tuning helens sp240 beast he noted the intake temps were much better. I think it's down to core size tbh.

[dan944]

And I'll test this area if I get the chance.

[1979scotte]

Do the job once and do it properly.
Charge cooler is the proper way.

You'll need a much bigger turbo than a 1zz one of the larger GT28xx maybe even a gt30xx.

Remember you've got much stronger internals than a 1zz but the transmission is still the week spot. That's why a rotrex works so well. You make make 350bhp and still keep the torque around the 250 mark.

Think about things carefully. You've already done a 2zz swap and found it wanting are you sure going FI is what you want or would you be better off cutting your loses and buying a Cayman S.

[michaelb]

I could have bought a Porsche if I wanted a Porsche mate, I had an MR2 Roadster as my first car and it's a bit of a nostalgia thing with me. I always loved the wee car, but I always wanted to give it a bit more. The 2zz is great, no complaints at all but I had always envisaged turboing or supercharging it. I'm also doing a lot of work to the exterior and interior. I want to make a pretty unique beast!

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[shnazzle]

I'm chuffed someone's willing to push the envelope a bit and strap a turbo to a 2zz. Definitely been done before with epic results. Yes gearbox is an issue but can be overcome.
As for stg2 cams; thats the only part that may need to be swapped for a more turbo-friendly profile.

Keep oil temps under control as well as air (charge for sure with radiator in front) . Mishimoto coolant radiator or something with solid alloy tanks. Check crank case ventilation and make sure you're never in danger of pressurising the crank case. Oil catch can.

And.. Key.. Get a good standalone. Go for the best you can afford with as many inputs as you can find. Oil temp and pressure, WBO, EGT, IAT.