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Je fsr pistons

Anyone using the JE 98mm FSR pistons in a turbo motor? these feature a lighter forging as well as smaller tapered and reinforced pin bosses, skirt design is a bit different from the standard piston and they cost about a $100 more, in my case I would also need to pay a $370 rush fee just wondering if it is worth the extral nickel, doesn't sound like the way to go but looking for input.
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Lincoln Phillip
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Old 03-09-2010, 03:25 PM
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Wachha up to linc? U been kinda quiet lately, so I know ur brewing up something tasty. Unless u r really pushing for crazy numbers (600+) I don't think the xtra $$ and design is needed. I would put that $$ towards a good tune. What is the CR for these 'FSR' pistons. BTW, when u autopsied ur motor, what did u find?
Old 03-10-2010, 04:46 AM
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Hey Juice, I am making mid fives at the wheels at 1 bar according to the dyno at Speedwerks on pump gas, and I believe I had a broken engine at the turbopalooza that was leaking major oil. When they went into the engine it was apparent that I had a failed valve that a piston went to town on, no over rev or any such issue just a bad valve.

Anyway I am shooting for long term reliability, before my wife demands that I get rid of the 600+hp money vacum.





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Lincoln Phillip
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Old 03-10-2010, 09:48 AM
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I believe I have the standard JE's. I'm wondering why you'd need to go lighter since the JE's are already much lighter than the short skirt Mahle's.
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Old 03-10-2010, 11:14 AM
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In my humble opinion whenever you can get lighter and stronger thus lowering your reciprocating mass is a good thing, the design of the FSR pistons really limits any wrist pin flex at higher RPMs under boost. I am just trying to flesh this out as I have not cut any corners with this engine and I want to get the best available stuff in there.
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87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound.
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"the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker
Old 03-10-2010, 11:32 AM
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FSRs are pennies from heaven - FINALLY, a modern piston for Porsches. There should be no question that anyone buying JEs should be buying the FSRs. This design should prompt JE to retire their entire old production line now, at least in fitments over 95mm (since they don't offer them smaller). FSRs and Nickies are now the top option for Porsche P/Cs over Mahles now, IMHO.

I have been harassing JE to build these down to 80mm for the vintage crowd - we'll see if my henpecking gets that anywhere.
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Old 03-10-2010, 11:41 AM
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Thanks Ken for the input, this is sort of what I was looking for, the delta in price is really marginal but I am paying for a rush as they still are not routinely stocking these.
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Old 03-10-2010, 12:05 PM
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I just ordered the FSR pistons and some new Mahle cylinders, I will keep you guys posted on the outcome.
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Lincoln Phillip
87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound.
Jeep, Chrysler, Dodge, Ram, SRT & AEV Dealer pm me for your Mopar needs.
"the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker
Old 03-10-2010, 02:25 PM
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How much were the Mahles? The JE alloy works fine with Mahles, but Nickies have the same silicon content as JEs, making them a slightly better thermal choice. That is irrespective of the fact that Nickies are a superior cylinder both from a cooling and strength perspectiive.
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Old 03-10-2010, 02:34 PM
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386/cyl from ebs
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Old 03-10-2010, 03:34 PM
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I actually learned that I am the first to order them for a turbo application, I am not sure that is a good thing, but the design has been used in NA cars for years with great success.
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Lincoln Phillip
87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound.
Jeep, Chrysler, Dodge, Ram, SRT & AEV Dealer pm me for your Mopar needs.
"the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker
Old 03-10-2010, 03:37 PM
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Quote:
Originally Posted by SCHNELE View Post
386/cyl from ebs
Gotcha - that's $523 cheaper than Nickies, per set.
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Old 03-10-2010, 03:38 PM
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Quote:
Originally Posted by SCHNELE View Post
I actually learned that I am the first to order them for a turbo application, I am not sure that is a good thing, but the design has been used in NA cars for years with great success.
The design has been used in high strung Japanese turbos for years. I don't think all of those overboosted Evos and STis are complaining.

Sleep easy.
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Old 03-10-2010, 03:39 PM
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Quote:
Originally Posted by SCHNELE View Post
I actually learned that I am the first to order them for a turbo application, I am not sure that is a good thing, but the design has been used in NA cars for years with great success.
I don't think it means a thing. Keep us informed how it goes. When do you expect the motor to be finished and on the road?
Old 03-10-2010, 05:54 PM
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OFF THE BOOST PIPE NOW...
 
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Linc, I was going to say buy them. For the slightly extra cost, it sounds like a great product. Let us know how it turn out.
Old 03-10-2010, 06:50 PM
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Has no-one seen that piston pic...holy cripes Lincoln....!!! I cannot believe the carnaghe and the valve as well....I say the pistons are worth it too.

Yasin
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Old 03-11-2010, 04:39 AM
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Just for the drool factor:

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Old 03-11-2010, 09:28 AM
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Kenik - do you know if JE maintain OEM piston pin offsets in their pistons, or are they typically centered in the bore ?

I'm sure they'd custom make what ever you want, but what about their off the shelf gear ?

John
Old 03-11-2010, 01:33 PM
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Don do you care to shed some light on why you chose to run an 8.0:1 CR versus 7.5 especially with the 3.6 crank? I am also running a cup car 3.6 crank.
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Lincoln Phillip
87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound.
Jeep, Chrysler, Dodge, Ram, SRT & AEV Dealer pm me for your Mopar needs.
"the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker
Old 03-11-2010, 06:14 PM
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Lincoln,

Hopeing to learn a little from your build.

What cams and turbo?

Looks like you do not hit full boost until 4500rpm. Are you running a huge turbo? If so, dose this get you a significant improvement in efficiency up top? Or???

The torque looks like it falls off very fast after about 5700rpm. Is there some reason for this or is this typical?

Thx in advance.
Old 03-11-2010, 07:22 PM
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