Not underboost - under boost. The GE head is for a naturally aspirated engine, not a boosted engine, so I was making a distinction between running the design configuration vs. a modified configuration.

I could explain, but I can't explain because the owner wouldn't appreciate it.

I can say I wanted to fill the lower third of the exhaust ports to give them a sideways D shape (for a lot of reasons), but the owner said no welding so I just cleaned up the turn, knocked off the casting flash, and called it a day.

 

The block is what makes it all possible because it is so over-engineered for the application. A brilliant cylinder head mated to an average or below average block will result in an average or below average engine. It's the weakest link concept. It's the fundamental superiority of the 2JZ block that makes it all possible, even with a head as compromised as the GTE head.

I have never touched a TVR engine, so I can't comment on it in any way.

 

Does that mean a turbo-ed 2JZ-GE is superior to a 2JZ-GTE?

 

I think it could be. It hasn't been proved (or disproved) yet.

 

so i guess what this all means is that we can all kiss the days of overenginerred tough as nails engines goodbye, huh

also is there a reason for the ge-gte head differences?

maybe it's because the na motor has to rely on the atmosphere and piston stroke to suck the air in and the gte is having the air forced in so the ports don't have to be as big as the ones on the ge head, that is my idea of a common sence explanation but i might be wrong.

i'm still a little bumed out that the I6 is going away, but i don't own a car company so i guess i can live with it.

 

Packaging. Period. More stuff in a smaller space.

 

There's always BMW for those who are still hardcore I6 fans.

 

It's obvious you are very knowledgeable about the 2JZ heads. On a related topic, will equal length headers like these OBX ones make any difference in low end torque and hp for the 2JZ-GE?

I've heard that in NA engines, all its does is lose low end torque and make the exhaust very loud and noisy. Also you may fail emissions testing.

In other words, is this mod worth the trouble?

 

I love their I6's....I personally think they are the best in the industry.

 

Aren't they the ONLY ones in the industry (for sale)?

 

True lol, but when there were more manufacturer of I6's, BMW's were the best of the lot in my opinion. They've been constantly refining and perfecting those engines for almost 40 years now and it's remarkable what they've done with those I6's.

 

"Finite Element Analysis"

Awesome posts!

 

i seen a couple I6 bmw's but i did'nt know they were building them for so long...

i never seen any really tuned bmw's like i see with toyota/lexus.

would you say that bmw's I6 could rival toyota's in power, weight, potential, size, litres and aftermarket support to back it up.

 

Are you kidding me? BMW I6's have been being modded for something like 30 years now and I have personally seen 1600hp BMW I6s. Sweden is pretty famous for their outrageous tuning of these motors.

Here are some videos:
http://youtube.com/watch?v=TJr0fxZE5...elated&search=

http://youtube.com/watch?v=1Wa4RwVlc...elated&search=

http://youtube.com/watch?v=mr6pnkbXM...elated&search=

http://youtube.com/watch?v=szMUTv9VR...elated&search=

http://www.youtube.com/watch?v=W_0RQ5oV0vI&NR

http://www.youtube.com/watch?v=5ibm7dDkPps&NR

http://www.youtube.com/watch?v=W_0RQ5oV0vI&NR

http://www.youtube.com/watch?v=q3uJT...elated&search=

http://www.youtube.com/watch?v=8nGxH...elated&search=

http://www.youtube.com/watch?v=pIDzCK-InXo

http://www.youtube.com/watch?v=q77w0...elated&search=

http://www.youtube.com/watch?v=MXReG...elated&search=

Yeah you get the picture...although I couldn't find the one with over 1600hp, it's around there somewhere.

 

DANM you shut me up

and here i thought 2jz's were king of the hill.

rather than pick your brain and annoy you with 20 questions, where can i read about these bmw's.