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Anyone used MAHLE forged pistons in their RB25DET?

R33RWKW

By R33RWKW,
in Engines & Forced Induction

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Cubes Grand Master

Cubes

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An interesting read...

http://www.importbuilders.com/pistoncomparo.html

I went with wiseco as they appear to be quite common and proven in the rb30's.

It also made a big difference that my engine builder swore by them. lol

They also happen to be one of the lightest pistons.

But that said.. Wiseco and Arias are both very good pistons.

CP's and some of these others are also apparently good, I've personally heard on set of CP's that were very noisy in a CA18DET.

R33RWKW Proficient

R33RWKW

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My engine builder uses these alot, on many different street & race prepped 4-&6cyl cars (including Skylines). I did a little research on these, didn't find anything to worry about.

2BNVS - My builder got these in Lilydale, Victoria. He paid $1100.00. I did a search in Google & and there is heaps of info on them & they should be available in NSW.

I was all for the Arias, cost wasn't really an issue, as they simular in price, but I was convinced by my engineer (had a first hand look at some of the engines he has built) & by a few people using these pistons & who had their engines built at the same place. Let's hope I made the right choice.

DoughBoy Veteran

DoughBoy

Posted
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CP's and some of these others are also apparently good, I've personally heard on set of CP's that were very noisy in a CA18DET.

Mahle are pretty good pistons, as long as you get the clearances to the spec sheet provided everything will be fine.

CP's are very fine pistons, they require little clearances (much less than Arias or Venolia). Due to the low expansion/clearances required, if they were put in a motor and spec'd to "normal" forged pistons you'll have excessive gaps, and probably get a bit of piston slap.. as well as blow by and wear. I'd be pretty concerned/annoyed if I was the owner of that CA18.

Cubes Grand Master

Cubes

Posted
Posted
I'd be pretty concerned/annoyed if I was the owner of that CA18.

Interestering you say that.

The builder is apparently the 'best' RB builder in SA, When choosing a builder for mine I threw a few questions at him and honestly had my doubts. So I went to some one else. :(

C_DawG Rising Star

C_DawG

Posted
Posted
id stick with well known stuff for anything relating to a motor thats getting a forged bottom end.

no pint risking to save a few $$ and then be stumped later.

Arias all the way

Mahle is a lot better known around the world then Arias mate, thank Porsche for that. Infact Arias are probably cheaper.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Mahle is a lot better known around the world then Arias mate, thank Porsche for that.  Infact Arias are probably cheaper.

i was reffering to use in Skylines.

each piston would be different for the respective motor.

many RB's run arias

proengines Rising Star

proengines

Posted
Posted

6 out of 10 Formula 1 teams use Mahle pistons. Thats a fair indication of their quality. Mahle is one of the worlds biggest piston manufacturers and supply F1, IRL, Nascar, WRC, V8 supercars etc.. as well as Mercedes, BMW, Porsche, Ferrari, GM, Ford etc.. They also own Cosworth Technology and ACL piston products.

They are a little dearer than most other pistons but quality costs money. Look at their F1 pistons, 19 500RPM, 15 000G when they change direction at that RPM and they stay together, thats a fair indication that they have it right.

Attached is a pic of their box-n-box design.

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