Highest bhp on a 1mz

[antnkel]

As title what is the highest bhp on a stock 1mz, I know that people have said 350 is about the limit on stock internals was just wondering if anyone's gone higher without blowing the engine.

[johnny g]

I'd have a look at WTFAuto/Tristan's got on his. Username is flupstar on the car forums.

Compound turbo 1MZ. Massive power on stock before it went baboom.

[conor]

Any forced induction on a 1MZFE automatically turns it into a time bomb if the longblock is stock. Even stock-pulley TRD superchargers.

Brad Bedell ran his 1MZ at ~550hp (supercharged + nitrous) for a bit. I don't think WTFAuto/Tristan has passed that yet. *shrug*

[Oteck]

wasn't tony running 400hp on a turboed 1mz?

[antnkel]

Originally Posted by johnny g

I'd have a look at WTFAuto/Tristan's got on his. Username is flupstar on the car forums.

Compound turbo 1MZ. Massive power on stock before it went baboom.

Yeh seen that think he had about 370whp when it blew

[antnkel]

Originally Posted by conor

Any forced induction on a 1MZFE automatically turns it into a time bomb if the longblock is stock. Even stock-pulley TRD superchargers.

Brad Bedell ran his 1MZ at ~550hp (supercharged + nitrous) for a bit. I don't think WTFAuto/Tristan has passed that yet. *shrug*

Why does it make them into a time bomb?

[Jason.MZW20]

Originally Posted by Oteck

wasn't tony running 400hp on a turboed 1mz?

I think so. He used the older 1MZ though (94-96), which supposedly has beefier internals in the short block. Replacement parts, though, have been superceded by the 1997+ parts.

All 1MZs have shot-peened connecting rods from the factory, but the cast pistons pose a very big problem for forced induction setups. Once the heat builds up (from running a little lean or boost creep or something in the tune) the chances of the piston grenading increase dramatically. You might be able to run it pig rich for a while to keep the piston tops cooler, but eventually, you'll try to get a little more power out of it by leaning it out and boom. The TRD supercharger, especially, will cause piston failure at 9psi because the compressed air is so damn hot (imagine running on a 105 degree day with that). If only it were intercooled ...

I'm not sure about the ring lands.

[Rassiel]

Originally Posted by conor

Any forced induction on a 1MZFE automatically turns it into a time bomb if the longblock is stock. Even stock-pulley TRD superchargers.

Brad Bedell ran his 1MZ at ~550hp (supercharged + nitrous) for a bit. I don't think WTFAuto/Tristan has passed that yet. *shrug*

Tristan did 540 atw IRC when he broke one of the stock rods, enough without the aid of nitrous
He first broke one stock piston ringland doing about 370 rwhp.