2.3l vs. 2.4l Life Span

[krummel21]

I'm assuming that the 2.4l will have a longer life span just because of all the benefits of the block but I was wondering how much longer that would be. Also about how long does the average 2.3l last or at least an estimate. I realize there are a lot of variables but I'm talking about a dd engine that sees redline maybe twice a day at the most.

[GVR4592]

What benefits of the block are you referring to?

[krummel21]

I guess I thought since the deck was taller that there was less wear on the engine. I might be wrong. Either way I guess what do you guys think about the life span of the engines?

Thanks again guys

[GVR4592]

The block is taller, and the piston is taller to compensate. The piston is also larger in diameter, these two factors increase the weight of the piston significantly over a 2.3 stroker piston. As for reliability, tuning, the engine build, boost and rpm are the things that will wear an engine down, it doesnt matter if it's a 2.0, 2.3, or 2.4.

[PieEyedPiper]

To further the idea the OP is going for,
What is the difference in rod angle between the 2.3 and 2.4?

I think that knowing the relatively extreme rod angles produced in a stroker setup, the OP was inquiring as to which of the two variations have a more extreme angle, and thus more cylinder wall/piston wear.

Are you indicating that rod angle, too, is the same in both designs because of the changes in the size of the pistons that compensate for the taller block?

[TunaTalon]

The 2.3L with a 100mm crank in 4G63 block and the 2.4L 4G64 have the same stroke and the same rod length. The rod angles are the same. The Velocity profiles are the same. Side loading friction is the same.

With stock pistons the larger pistons of the 4G64 does indeed produce more loading on the main bearings.

To get the benefit of the higher deck of the 4G64 you can use stroker pistons and long rods.

As always, I’m still pushing http://www.kidzuku.com/StrokeOrNot.pdf as a place to learn more.

[krummel21]

The reason I ask is that the engine I'm looking at buying has 12000 miles on it which I know isn't a great amount but I want this thing to last a while since it's a large investment. With the extra forces the 2.3l puts on the 2.0 block how much does this shorten the life span? I would think a little, even if it is tuned perfectly. With it being a dd and only seeing redline 2 times a day would that engine last over 100,000 miles or even 150,000 miles or is that almost impossible. I mean the rings would have to wear out sometime sooner than a 2.0 with the extra side load correct?

Under the same conditions is the life span of a 2.3l considerably less than the life span of a 2.0?

Would you buy a 2.3l that already had 12000 miles on it or is there a lot of problems coming soon?

Thanks,
Krummel21

[TunaTalon]

While your mileage will vary depending on how you care for and drive the car you can expect the same wear from the 2.3L or the 2.4L. And yes the longer stroke engines have more side loading friction and can be expected to wear faster than the 2.0L. To put that in context the cylinder walls in my 4G63 were showing no signs of wear after 183,000 miles bathed in Mobile One and hitting red line two to four times a day as a daily driver.

Side loading friction can be reduced somewhat by using lighter pistons and rods. I went with Wiseco and Eagle. After I put 183,000 more miles on my 2.3L stroker there will probably be some visible wear.

[krummel21]

Alright that makes me feel better as long as the thing isn't only going to last 60000 or 70000 I'm ok. He used a Weisco/Eagle set-up which I'm assuming is an alright set-up. You also think the bearings will last that long then?

[stockfornow]

The bearings will last a while, as long as you don't rev it up too high.

[TunaTalon]

Originally Posted by krummel21

Alright that makes me feel better as long as the thing isn't only going to last 60000 or 70000 I'm ok. He used a Weisco/Eagle set-up which I'm assuming is an alright set-up. You also think the bearings will last that long then?

In a street driven car the balance shaft bearings will wear out before the main or rod bearings. That is of course if the balance shafts are still in there.

At 183,000 miles my original main and rod bearings were in “like new” condition but the balance shaft bearings were the near end of life.

For my stroker project I upgraded to ACL tri-metal bearings for a little more of a warm fuzzy feeling.

[snailspool]

Originally Posted by TunaTalon

As always, I’m still pushing http://www.kidzuku.com/StrokeOrNot.pdf as a place to learn more.

Thats some good reading!