Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - A More Efficient Engine (Need help from some Toyota Experts)

serialk11r · 08-14-2013, 01:37 AM

Short answer: Give up, you're screwed. I have your drivetrain (if you are driving stick) and I've looked into this.

Longer answer: The European/Japanese spec engines that you mentioned are impossible to obtain in the US unless you ship one over. The 1NR can only be found in automatic here in the latest Scion iQ, and the electronics are probably going to complain if you try to bolt it to your old chassis without the host of electronics that the new car has.

The most efficient general purpose Toyota engine you'll find in the US is the 2ZR-FAE that is on the latest Corolla Eco model. The throttle plate is not used, so it incurs very little pumping loss, and it has a good compression ratio.

You can be a guinea pig for a 2ZR-FE transplant if you like. The new Corollas come with 6 speed manual transmissions but it'll cost a fortune to get one since they're brand new. Luckily the 2ZR-FE seems to have minor improvements over the 1ZZ-FE so you might find it worth the time. If the whole thing bolts in without too much modification then great.

The 1NZ-FE fits with some modification; Someone bolted it to a C60 using an adapter plate, and had to use a custom engine mount since the engine is shorter.

If you want to modify the 1ZZ I have some ideas for you; "Atkinson cycle" : you can pay Delta to regrind your intake cam for about 200 bucks for higher duration. 12:1 compression pistons are available and you can probably shave the head a tiny bit. You can get a piggyback air/fuel controller and wideband O2 and run leaner mixes for pumping loss reduction.

08-14-2013, 01:37 AM	#4 (permalink)
serialk11r Master EcoModder Join Date: Jan 2012 Location: United States Posts: 1,756 spyder2 - '00 Toyota MR2 Spyder Thanks: 104 Thanked 407 Times in 312 Posts	Short answer: Give up, you're screwed. I have your drivetrain (if you are driving stick) and I've looked into this. Longer answer: The European/Japanese spec engines that you mentioned are impossible to obtain in the US unless you ship one over. The 1NR can only be found in automatic here in the latest Scion iQ, and the electronics are probably going to complain if you try to bolt it to your old chassis without the host of electronics that the new car has. The most efficient general purpose Toyota engine you'll find in the US is the 2ZR-FAE that is on the latest Corolla Eco model. The throttle plate is not used, so it incurs very little pumping loss, and it has a good compression ratio. You can be a guinea pig for a 2ZR-FE transplant if you like. The new Corollas come with 6 speed manual transmissions but it'll cost a fortune to get one since they're brand new. Luckily the 2ZR-FE seems to have minor improvements over the 1ZZ-FE so you might find it worth the time. If the whole thing bolts in without too much modification then great. The 1NZ-FE fits with some modification; Someone bolted it to a C60 using an adapter plate, and had to use a custom engine mount since the engine is shorter. If you want to modify the 1ZZ I have some ideas for you; "Atkinson cycle" : you can pay Delta to regrind your intake cam for about 200 bucks for higher duration. 12:1 compression pistons are available and you can probably shave the head a tiny bit. You can get a piggyback air/fuel controller and wideband O2 and run leaner mixes for pumping loss reduction. Last edited by serialk11r; 08-14-2013 at 01:43 AM..