Excellent work!

How is it that the Mahle pistons can be more than 100 grams lighter than the Wiseco pistons which are the same size except for a 2l rather than a 2.3l? Not only is that a significant difference, it is scary.

I know Mahle makes excellent motorcycle and auto pistons but how well do they stand up to abuse vs. Wiseco? If your building a 700 crank HP engine, which would you reach for first?

I may be making a new piston choice from now on.

Thanks again.

 

I am putting Mahle in my STI right now, so I will report back on what type of abuse they will handle!

They have always had the lightest set up available, it is my impression that they will not hold up to 700 plus WHP, but we will see... the STI should be at least 600 plus.. so....

Right now, I am still a Wiseco fan (unless Mahle proves to me otherwise!)

Ps.. oil squirter debate is way out of hand, maybe we should machine two sets per hole so we can run more timing advance.....

Mike Huml

 

Yeah they are completely pointless. I guess you have an engineering degree and know much better than the Mitsubishi engineers right?

 

If this was directed at myself, refer to post #39.

So quick to forget.

Mike Huml

 

I would love to know about those pistons and what abuse they are able to take.

What thickness are the ring lands comparative to the Weisco? If a forged piston is going to give up that is usually the first place that it's going to happen.

Also, do you have any weights for the Ross and CP pistons. I'm wondering if either are as light as the Mahle piston.

 

Nope referring to TEC

 

This thread is supposed to be about the 2.4l block and we are getting some good info in this thread on piston and rod weights that will help some of you extend the bearing life and total life of your engines if you pay attention.

So far, every rationale that you have given us either defies the basics of the way a mechanical engine operates or is based upon your total conjecture.

Lets summize where you have been wrong so far. They don't do anything for engine compression, they don't keep any item from wearing out prematurely, and they don't allow for more ignition advance or prevent detonation/preignition either.

Lets put this in a nutshell. Either tell us what the engineers know that we don't or drop it, PLEASE.

 

READ:

http://www.isuzucv.com/engines/4h_feat_pistons.html

http://www.pontiac.com/divisional/ne...s_solstice.jsp

http://www.gm.com/company/gmability/...ent_051806.htm

http://www.pbase.com/stealthfti/lblock

http://www.itepsa.com/Detail.bok?no=1362

http://www.fluent.com/solutions/automotive/ex240.pdf

http://kb-silvolite.com/article.php?action=read&A_id=64

http://www.iitk.ac.in/erl/abstract/a..._manibijoy.pdf

http://www.elsbett.com/us/elsbett-di...ng-system.html

http://salesmanual.deere.com/sales/s..._internal.html

 

I think it is excellent that you can find articles and copy links on this webpage.

Well done!

Now try it again and reference something that has to do with forged internals.

- Not diesel engines which have very large piston to wall clearances which are you can hear them slap around in the cylinders. Unless you plan on putting one in an EVO.

- Not GM Ecotech engines or other engines that they produce with cast pistons.
*You see forged piston have this thing called a forced pin oilers which you don't see alot of in stock engines with cast pistons. So maximum oiling is designed into the piston
*Cast pistons are made with a totally different material with totally different properties than forged so yeah oil squirters may be a good thing. So apples and oranges

- Not someones opinion as stated on their homemade webpage (I can find you one that will tell you that aliens are walking among us)

- Certainly not from a BS company webpage trying to sell their latest gizmo (the words Air Tornado come to mind)

Thanks and have a nice day!

 

Ummm...forged internals expand when heated. If you wish to discuss the use of piston cooling further, go to this already posted thread:

https://www.evolutionm.net/forums/sh...ight=squirters

I apologize for going off topic, but I still think the squirters are important for high thermal loads (even when using forged pistons). If anyone else has any comments on oil jets and piston cooling, please post in the above thread.

 

Wow, this is a good read...why did it stop?

 

second that. Good read, someone should update more info?

 

could you add this to the original post?

 

Ken,

Isn't the Lancer Ralliart 2.4L with Mivec, the 4G69 motor? Are you saying that the Seventh Generation Mitsubishi Lancer Ralliart with a 4G69 2.4 L SOHC MIVEC I4 actually works?? This engine comes from the factory with an 87mm Bore and 100mm Stroke. Please confirm! I think this 2.4L engine was available in North America from 2004-2006. Is it possible that Mitsu made this block with heavier cylinder liners, as the bore just seems to be getting larger and larger.

 

i know it's old, but why did this great thread just completely stop?? did the information simply run out or something lol?