FJ hp/tq vs Taco hp/tq??

[135boom]

Ok, I did a search and didnt find much of anything. Just curious why the 2007 Tacoma is rated at 236 hp @ 5200 rpm 266 lb.-ft. @ 4000 rpm and the FJ is rated at 239 hp @ 5200 rpm 278 lb.-ft. @ 3700 rpm

While the hp might only have a 3 hp difference, the Tq is off by 12 ft lbs at a lower rpm! Last I checked the motors were the exact same. Is it cause of a different exhaust layout possibly?

I know both these vehicles are based off the new SAE rating (which brought down the original tacoma numbers from 245 to 236).....so Im just kind of curious if anyone has a theory or actually knows whats up?

[135boom]

I'll also add that the 07 4-runner is rated the exact same as the tacoma with the 4.0L

[TacoMSU]

The FJ spare tire cover adds 3 hp and 12 lb/ft tq

[135boom]

oh, that makes sence

[zmtnbik]

Originally Posted by 135boom

I'll also add that the 07 4-runner is rated the exact same as the tacoma with the 4.0L

I assume that's the 4-runner with the 4.0l and not the v8

[aquamandrew]

The FJ is more aerodynamic, somehow boosting the hp.

[Fluxaholic]

Even when you put the same engine into different applications, you end up with different numbers.

[HiTek21]

I was reading on Wikipedia for the GR Motor that if you use 91 octane you can get 239hp and 278lb/ft torque. I don't know how true this is


The 1GR-FE is the 4.0L version. Bore is 94 mm and stroke is 95 mm. Output is 236 hp (183 kW) at 5200 rpm with 266 lb-ft (382 Nm) of torque at 4000 rpm on 87 octane, and 239 hp at 5200 rpm with 278 lb-ft at 3700 rpm on 91 octane. This engine features Toyota's single VVT-i, variable valve timing, system and a compression ratio of 10.0:1. Inside, the 1GR uses a taper-squish combustion chamber design with matching pistons to improve anti-knocking and engine performance, while also improving intake and fuel efficiency. Toyota adopted a siamese-type intake port, which reduces the surface area of the port walls and prevents fuel from adhering to such walls. This engine has special cast-iron cylinder liners cast into the block, which are a spiny type to improve adhesion between the liner and cylinder block. With these special thin liners it is impossible to bore the block. In the event of cylinder wall damage (scoring, deep protrusions, etc), the entire cylinder block must be replaced. For increased block rigidity, the 1GR also receives a high temperature plastic insulator/protector, which fills the empty space between the outer portion of the cylinders and block material common to open deck engines. For increased cooling efficiency, the 1GR employs water passages between the bores of the engine. There are such 2 passages for each bank for a total of 4. This reduces cylinder hot-spotting and keeps combustion chamber temperatures more uniform.

[TacoMSU]

Is "taper-squish" a technical term?

[troyslegacy]

They are the same. The 239 HP and 278 ft-lb torque are the old numbers.

[135boom]

Originally Posted by HiTek21

I was reading on Wikipedia for the GR Motor that if you use 91 octane you can get 239hp and 278lb/ft torque. I don't know how true this is


The 1GR-FE is the 4.0L version. Bore is 94 mm and stroke is 95 mm. Output is 236 hp (183 kW) at 5200 rpm with 266 lb-ft (382 Nm) of torque at 4000 rpm on 87 octane, and 239 hp at 5200 rpm with 278 lb-ft at 3700 rpm on 91 octane. This engine features Toyota's single VVT-i, variable valve timing, system and a compression ratio of 10.0:1. Inside, the 1GR uses a taper-squish combustion chamber design with matching pistons to improve anti-knocking and engine performance, while also improving intake and fuel efficiency. Toyota adopted a siamese-type intake port, which reduces the surface area of the port walls and prevents fuel from adhering to such walls. This engine has special cast-iron cylinder liners cast into the block, which are a spiny type to improve adhesion between the liner and cylinder block. With these special thin liners it is impossible to bore the block. In the event of cylinder wall damage (scoring, deep protrusions, etc), the entire cylinder block must be replaced. For increased block rigidity, the 1GR also receives a high temperature plastic insulator/protector, which fills the empty space between the outer portion of the cylinders and block material common to open deck engines. For increased cooling efficiency, the 1GR employs water passages between the bores of the engine. There are such 2 passages for each bank for a total of 4. This reduces cylinder hot-spotting and keeps combustion chamber temperatures more uniform.

......VERY interesting. Wonder why toyota would publish the FJ numbers using Premium unleaded...and the 4-runner and tacoma with regular unleaded?
I have TOTALLY felt a difference in my truck with 92 vs 87 or 89. I know the timing was being retarded, cause I few times I actually heard it knock using 87. AND, I would always notice the truck would run strong one minute, then run kind a "restricted" the next. Felt like it was being held back.
NOW it just runs...and runs really well.

[evlfred]

yes, squish is a technical term, it's used to describe the area of the combustion chamber where the piston meets the head (nearly) creating a shockwave into the rest of the chamber to stir the mixture.

[2 tacomas]

Originally Posted by 135boom

I'll also add that the 07 4-runner is rated the exact same as the tacoma with the 4.0L

Don't forget about the 2007 Tundra....it also comes in a 4.0L configuration.
It has the same output #'s:
236 Horsepower @ 5200 rpm
266 Torque @ 4000 rpm (lb.-ft.)


Damn, Toyota is using this engine in a lot of vehicles: Tacoma, FJ, 4-Runner, and Tundra.

[TacoMSU]

Originally Posted by evlfred

yes, squish is a technical term, it's used to describe the area of the combustion chamber where the piston meets the head (nearly) creating a shockwave into the rest of the chamber to stir the mixture.

I had no idea.

[digijohnson]

Originally Posted by aquamandrew

The FJ is more aerodynamic, somehow boosting the hp.

Hopefully that was a joke. I've never seen a dyno machine that adds wind during the test