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20v Swaps Everything you need to know about putting the 20 valve 4A-GE in your AW11 MK1 MR2.

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Old 07-07-2009, 12:59 PM   #1 (permalink)
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Turbo

Hello everyone,

I'm not sure if this is the right place to ask this

I have a 4AGE silvertop, simply put I want to thurbo charge it.

What's the cheapest way to go? Parts needed?

If I already have a GZE pistons, what more do I need? larger injectors, turbo and manifold, fuel pump and regulator, intercooler and piping, BOV, etc. what else?

how bout for ECU? can I run stock? how? or do I need piggy-back? what? SAFC?

goal is a daily driver with around 200 to 240 HP

Thanks!
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Old 07-07-2009, 03:29 PM   #2 (permalink)
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The 20v has been turboed with 4agze pistons. The result is a motor that is interference and has lower comp than the GZE. There are lower comp forged 20v pistons that you can buy.

Management is also a problem. You could do low psi on the stock silvertop computer. Much past 5psi at 10.5:1 comp, and you'd probably need a standalone.
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Old 07-07-2009, 07:00 PM   #3 (permalink)
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so if I get GZE pistons, with the stock ECU all I can go would be 5 PSI? how bout if I have a let's say an APEXi SAFC? would that help me go up to 10-12 PSI? thanks!

Also I can get my hands on either APEXi SAFC and/or GREDDY E-manage, which should I go for if I'm shooting for about 10-12 PSI of boost?
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Old 07-08-2009, 03:29 AM   #4 (permalink)
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5 p.s.i. at 10.5:1

Is near the same as having 10-12 p.s.i around 8:1

If you simply have a goal in terms of boost pressure.... Then go low compression. If you want a nasty street machine leave the stock compression ratio.

When your off boost you'll have a high compression ratio and plenty of power until you hit boost, run a large turbo and make impressive power. Other than ease of tuning I really have never understood why so many people lower their compression ratio.

I have a good friend running a T70 on a rotary with a 10:1 compression ratio. While off boost it screams like an N/A rotary. When it hits boost at 5K it spools up to.... 5 p.s.i. (Ironic I know) and lays down 440 WHEEL horsepower on pump gas. Now this is an OLD school 12a 1.1 Liter, on a 13b it would make more power.

And rotaries are really no different in terms of power production than piston engines, and 12a's are especially similiar in power production to the 4A-GE.
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