[Fot] Nuerburgring Nordschleife 400 km race

[MadMarx]

I’m afraid of scuffing too but today I got the manufacturer on the phone
twice (different people) and they told me, stay with set clearance.

I asked them why their pistons don’t expand that much. Answer: Less
expanding aluminum, special shaped for well fitting. They are more oval.

They are made from Mahle. They do F1 pistons also and DTM cars pistons. I
hope they should know.

 

 

Von: tom strange [mailto:tstrange at sbcglobal.net] 
Gesendet: Samstag, 20. September 2008 16:02
An: MadMarx
Betreff: Re: [Fot] Nuerburgring Nordschleife 400 km race

 


Good morning,

  I'm curious who are you getting pistons from?  

  I get mine from JE (I use the regular JE import car piston for the spit,
not the fancy JE Pros)  They call a clearance something like this for street
use, and say you can run up to 4 or .0045 for a race application.  I always
hone to .0055 to .006 clearance and have never had a piston problem.  You do
get some scuffing with that much clearance, but it has never been a problem.
Running them too tight can be a problem.  

  I have had several engine problems over the years but never related to the
pistons.  (mostly valve issues due to me insisting on designing my own cam
profiles and valve train in hopes of engineering myself to the back of the
pack ;>)

 


 

Tom

http://www.fot-racing.com/spit/caption/tom_strange.htm



#4 white spitfire



--- On Fri, 9/19/08, MadMarx <tr4racing at googlemail.com> wrote:

From: MadMarx <tr4racing at googlemail.com>
Subject: Re: [Fot] Nuerburgring Nordschleife 400 km race
To: "'Friends of Triumph'" <fot at autox.team.net>
Date: Friday, September 19, 2008, 3:41 PM

I have ordered new forged pistons and the manufacturer insists on 0.0024
piston to wall clearance.

 

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