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You're going to spend tons of money getting "optimum power" out of a naturally aspirated 1UZ engine. Trust Rod & me - together, we've probably spent six figures on these engines, and haven't accomplished what a stock Chevy LS can put out. Put a 50 shot of nitrous on it and you'll be there.

Welcome! Nitrous is the cheapest power adder going, but be careful, it's the equivalent of crack cocaine for car junkies :) and the consequences are just about the same.

Kelvin (Gloverman) is definitely one of our hidden treasures here at Lextreme.......

I've often thought about coating the intake side (fuel rails, manifold, etc.) with a heat insulating ceramic/polymer coating and/or then wrapping it with the usual fiberglass stuff. Just to keep heat soak to a minimum. Probably more applicable for a street car than a racecar.

Composites would help with the heat insulation too.....

True DIY wizardry Frank; kudos to you!

Well done Frank, but I'd watch out for belt oscillation with that long dry sump drive belt. Are you going to run it on an engine dyno prior to putting it in the car?

I'd only trust Genuine Toyota Blinker Fluid for this critical application :)

Kelvin, it looks like it was running a bit lean. I'd suggest checking the blinker fluid for the right AFR. :) When the die grinder came out I nearly wet myself!!!!!

Ivan, you bring up a good point about the charge air cooling, but it also depends on how efficient your blower is. I forgot, are you using a Roots or a screw type? And you're right, you'll get more peak power out of turbo's, but you won't get that huge bump in torque until they're on boost...

Interesting swap, perhaps Zuffen, Gloverman, or someone else with truck experience will jump in and offer advice. Good luck with your project!

Mat, you can buy with confidence from gloverman. Stand up guy and has been with us here on Lextreme for eons.......

Mat, while I respect your desire to save a few pounds, the OEM part is not that expensive; why not just purchase it from your local Toyota/Lexus stockist/dealer? If you've already had issues with the Chinese junk, why replace it with a used part?

Nice writeup - thanks!

I think that article is incorrect, but will verify later. Toyota/Lexus have always used powder forged rods in their engines, and the pistons are the hypereutectic variety.

Welcome Tom - you have a really interesting project there! You should have a look at this thread: http://www.lextreme.com/forums/index.php?threads/1uz-vvti-race-car.17293/#post-143866 and hookup with Frank Clark, the OP, and see if you can get him to cast another dry sump pan for you. These...

Hey Mumf, welcome to the forum. We need people like you!!! IMHO, the best way to learn about these great engines is to read first, then wrench. The New Car Features (NCF) files are a treasure trove of great info, especially for new guys trying to learn more about the UZ engines. Send me a PM...

I wish you or Gloverman would try it and see if those monster UR's would fit in the newer models.

Well done George! I'll bet that IS250 surprises a LOT of people