Need your advise about JE Pistons 8.5:1 or 9.5:1

[Mostic]

Hi Guys,
I am confused between the JE Pistons 8.5:1 or 9.5:1 for the 2.0T FSI engine. I am already running the JE 9.5:1 in my setup with GTX2867R but I am preparing another engine for another car and I will use GTX2867R kit for a while then I will replace it by EFR7163 kit.

Target:
Like all of us (crazy people) to run an aggressive setup/tune with maximum power the car can get with 0 timing pull

Note:
The fueling here is VERY bad, the octane 95 we have here which is equal to RON98 is like octane 91 = RON93.
I will run the octane 95 we have here with WMI 50/50

What is your opinion/advise?

 

[alfmoonspace]

Do you access to E85? I'm curious what response you will get or if anyone has tried those lower compression pistons.

 

[Mostic]

I would give a lower compression a try but I don't know yet if I will go for it or not, I may change the idea of JE & IE and go for Mahle pistons and DM I-Beam rods

 

[eurocars]

9.5:1 will be fine and give better off boost drivability

 

[Mostic]

I guess I will go for Mahle 9.0:1 but I never try before but sure it will be better than JE


-------
Philosophy Of Eagles:
- Eagles flies only with eagles!
- To reach the top you must fly with the Top!

 

[GTI's]

What is the issue with the JE pistons?

 

[donjuan1jr]

9.5 to 1...I don't like 8.5 to 1 due to fueling and off boost power.

 

[abacuc]

Buy 9.5:1 then lower CR to 9:1

 

[Mostic]

90% I will go for Mahle 9.0:1
The problem with JE is pistons slap specially in our country and Middle East.
I guess that's due to hot weather and poor fuel!!


-------
Philosophy Of Eagles:
- Eagles flies only with eagles!
- To reach the top you must fly with the Top!

 

[Mostic]

Buy 9.5:1 then lower CR to 9:1

How I can lower the CR from 9.5:1 to 9.0:1 ??


-------
Philosophy Of Eagles:
- Eagles flies only with eagles!
- To reach the top you must fly with the Top!

 

[donjuan1jr]

90% I will go for Mahle 9.0:1
The problem with JE is pistons slap specially in our country and Middle East.
I guess that's due to hot weather and poor fuel!!


-------
Philosophy Of Eagles:
- Eagles flies only with eagles!
- To reach the top you must fly with the Top!

That's due to the nature of the 2618 alloy the je is made of. Mahles are 4032 and run a tighter clearance because of less expansion.

 

[GTI's]

JE makes Fsi pistons in both 4032 and 2618 alloy.

 

[donjuan1jr]

JE makes Fsi pistons in both 4032 and 2618 alloy.

Yea but Mostic runs the je 9.5:1 which only come 2618.

The SRP Je pistons(4032) only come 9.0:1 and 82.5 and 83.0...unless something has changed that i dont know about. Ive run the 2618 with no issues.

 

[Mostic]

That's due to the nature of the 2618 alloy the je is made of. Mahles are 4032 and run a tighter clearance because of less expansion.

:thumbsup:
That's why I will go for Mahle Pistons but the only thing I never tried or read about is DM forged I-Beam but it has been recommended by someone I trust very much.

JE makes Fsi pistons in both 4032 and 2618 alloy.

Don't know about that but even I guess Mahle is better.

Yea but Mostic runs the je 9.5:1 which only come 2618.

The SRP Je pistons(4032) only come 9.0:1 and 82.5 and 83.0...unless something has changed that i dont know about. Ive run the 2618 with no issues.

My MKV car runs the JE 9.5:1 and it pull really strong but I decided to avoid all points with the Scirocco build.