MAPECU3, PPE headers dyno
Rookie
Joined: Jan 2012
Posts: 66
Likes: 1
From: UT
I have always loved this write up on the 2gr-fse and this will apply directly the the 2UR also in the IS-F
http://www.sae.org/automag/techbrief...1-114-1-17.pdf
It talks (pg18) about the design of the combustion chamber and the almost impossible task it was for Denso/ yahama to produce a DI injector for this motor.
These are also sleaved blocks, so power output may reach double but much over that will produce broken rods.
The 2JZ has a solid deck. That happens to be cast iron. This is the difference also.
I predict from my magic ball that the head gasket will blow from the bottom end moving around, a condition caused by the open deck alu. Block design.
This motor will never be a powerhouse because of these very design flaws. And the same applies to the ISF motor. Sorry but look at all open deck designs that may apply to anything north of 700hp. You'll see motors that fail often
Hate away fellla's......
http://www.sae.org/automag/techbrief...1-114-1-17.pdf
It talks (pg18) about the design of the combustion chamber and the almost impossible task it was for Denso/ yahama to produce a DI injector for this motor.
These are also sleaved blocks, so power output may reach double but much over that will produce broken rods.
The 2JZ has a solid deck. That happens to be cast iron. This is the difference also.
I predict from my magic ball that the head gasket will blow from the bottom end moving around, a condition caused by the open deck alu. Block design.
This motor will never be a powerhouse because of these very design flaws. And the same applies to the ISF motor. Sorry but look at all open deck designs that may apply to anything north of 700hp. You'll see motors that fail often
Hate away fellla's......
The DVVT-i 1GR-FE in the wife's 4Runner sounds like a better candidate for FI than this "performance" motor.
As for open vs. closed deck, you might be on to something. I doubled HP on an EJ20 and I suspect that block sees a fair bit more squirm than any V block. I also think that this motor has some kind of reinforcement in there.
Thread Starter
Lexus Test Driver
Joined: Aug 2009
Posts: 1,353
Likes: 3
From: Louisiana
why you gotta **** in the lemonade???
just messin, facts is facts
Advanced
Joined: Oct 2005
Posts: 651
Likes: 3
From: Ontario
So what if it's FWD and AWD, the only thing that matters is the bolt pattern on the bell housing?! Even the 3SGTE can be converted to RWD!
The 2GR-FE is a transverse mounted V6 used only in FWD applications.... certainly you could convert it to fit/work in a RWD car... but I'm not sure why you would. If bothering to do an engine swap for power why wouldn't you swap in a way stronger RWD engine like a 2JZ-GTE?
Advanced
Joined: Oct 2005
Posts: 651
Likes: 3
From: Ontario
The 2GR would be staying within the "same" family of V6 engines whereas the 2JZ, would be much more difficult to fit, weigh more, affect the weight distribution/handling (unless you do some cutting) and be more difficult. Unless that's you're intended direction.
Of course, you'll gain the use of a manual trans with more modifications,....etc,...etc. Having stuffed a Jaguar 4.2L straight six with auto and E-Type independent rear end in the back of a Morris Marina I have a pretty good idea of what it takes to do major mods.
The intent of my suggestion is to keep it as simple and straight forward as possible... it may be easier to just trade up to an F. But,....you'd just have another F
Of course, you'll gain the use of a manual trans with more modifications,....etc,...etc. Having stuffed a Jaguar 4.2L straight six with auto and E-Type independent rear end in the back of a Morris Marina I have a pretty good idea of what it takes to do major mods.
The intent of my suggestion is to keep it as simple and straight forward as possible... it may be easier to just trade up to an F. But,....you'd just have another F
Really ? 8 speed and paddle shifters ? and this 448whp to 600whp possibilities .
https://www.clublexus.com/forums/is-...-a-newbie.html
https://www.clublexus.com/forums/is-...-a-newbie.html
I think de-stroking the engine is a complete non-starter. The reason you de-stroke an engine is to reduce the speed of the pistons and thus load on the rotating assembly (rods mostly) at high engine RPM, which gives the mechanicals in the engine the ability to rev higher without breaking.
By doing so you inherently give up some torque. How are you going use the ability to rev higher to make up that deficit?
By doing so you inherently give up some torque. How are you going use the ability to rev higher to make up that deficit?
Last edited by WylieKylie; Sep 9, 2014 at 03:15 PM.
Pole Position
Joined: Nov 2013
Posts: 367
Likes: 3
From: ca
Need some help I'm planning on installing mapecu on my is350 but need help in regards to the harness jumper I'm going have made for me. How long did you have them make the harness for you? And second where did you locate the mapecu??
Intermediate
Joined: Jun 2012
Posts: 453
Likes: 140
From: Tx
I have a mapecu3 in case I want to do turbo piggyback. It seems easy to tune and does have features to lock the O2 voltage into the stock ECU and try to keep the mapecu in control.
It does control the ignition coils directly which helps in tuning....
It does control the ignition coils directly which helps in tuning....