What is it in the system that is causing that big of turbo to die off after 6500rpm? Is it just the nature of the turbo itself that does not allow it to flow much up top? Also, my BBK makes 100-150 ft# more on a 2.0L at 4000rpm. How much do you think that would be on a 2.4L or even a 2.2L?

How would a 2.2L powerband look different? Would it shift the whole graph to the right or would it preserve the bottom end and just move the peak to the right? Basically, I'm wondering what benefits vs. losses you see from a 2.2L vs the 2.4L

EVOlutionary

 

I remember first time I drove my friends 2.4 while tuning it on the stock turbo. It was almost retarded how fast TQ came on even with low boost and pump gas. It would run out of steem up top fast but with a larger turbo it should be fun.

I'm really excited to get mine done.

 

Do you recommend 2.4's for road racing Aaron?
Would have a ~GTX3076 sized turbo.

 

If the VE of the engine doesnt change in too radical of a manner other than displacement going up, the power will be moved left almost always. Turbo is the same, cams are the same, etc. I changed cams in mine and went to a bigger motor and moved the power magically to the right. So a 2.2 and your combo will move the power further down, and a 2.4 will move it further down yet.

Here is an example of a car that with no other changes went from 438whp at 34psi on the stock 2.0L to this on a 10:1 2.4-



Ignore the blue line, that was a rally test with a 34mm restrictor.

Luke loves his. The torque for corner exit is awesome so I am told.

 

extra displacement definitely kicks *** for sure.

 

I would have to say that I love my ER LR2.4! I have driven prob 100 different evos with 1000 different mods. The LR2.4 is the best motor imo. A proper setup LR2.4 can rev to 9k and make more power/tq than any 2.0. The feel of driving a 2.4l is night and day compared to a 2.0. Our other shop car is a LR2.1 and I hate driving it. I go back to my car and it feels like a supercharged car.

Aaron, we our tuning our Spec-Ops LR2.4 w/ TS HTA3582 later this week. I'm sure that car will be a blast and the customer will be 100% satisfied. I love seeing customers that drop off their stock 2.0 and when they come back to pick their car up with a LR2.4, they drive away smiling. Many even come back 15 min later just to shake our hand and say thank you again... It truly is night and day!

My LR2.4 is getting a rebuild next month. We are doing a sleeved/filled block and a few other idea I had in mind. I may be calling Aaron to run some things by you.

Mikey

 

Please be sure to post the results on this setup.

-Acree

 

20% more displacement and it has more power?
What a concept.

 

Most def will Acree, it won't be anything to crazy as the guy wants to stay 93 for now. I may give him some Q16 just so I can see what it does on full tilt, then flash him back to his 93 map

Mikey

 

JB,

What is your take on the rods when doing these 2.4 or 2.3 builds? Is the lighter rod going to be that much better for longevity and wear? ALso what about the crank? is it fine to go with the oem or is it that much better to go with the billet cranks offered by manley and others?

Thanks man and great testing as always!

 

Keep in mind a stock rod is 695g, so really any good aftermarket rod is better than that. The rods in our motors are 602g for the I beam and 568g for the H beam. The piston in a LR2.4 is also lighter since it has reduced compression height and skirt length. Stock is 360g + pin where the LR pistons are 309-315g. Everything we are spinning is lighter with the exception of the crankshaft which is more about main bearings. That being said, the stock crank has worked admirably for me up to 8800 so far and the motor for next year has the clearances to run 9200-9300 if I need to. With the different final drive I will be running I shouldnt have to do that unless I wanted to run 24.5 slicks or something.

Aaron

 

So I just discovered that the car in question actually has a 3076 on it, not a 35R as I thought it did. False alarm.

 

Great info as always. I didn't know the components were that much lighter. I have yet to see a BB green on a 2.4 Lr. Perhaps full boost before 3k?

 

That explains things a little better

John,

What is your take on the longevity of a 156mm 2.4L compared to a standard length 2.4L? I've heard that the LR is harder on your bearings. Is this true?

I ask because I'm building a 2.4L now for a DD and need it to last as long as possible, and won't use 156mm rods if they're going to have a large negative effect on that.

 

Thanks for posting this Aaron! Another thread showing why I will go no smaller then a 2.3 when I build my motor, probably a 2.4 though...damn it, I can't wait!