im Just curious if you buy mahle pistons that are coated for the fiberglass wall if you need to have your block sleeved to run 15 to 18 psi and make about 400whp ?

 

with mahle gold pistons you do not need to sleeve. The cylinder walls are frm "fiber reenforced metal" not fiberglass. Read the faqs ppl tend to get upset when questions like this come up. Almost all general questions most ppl have are answered there and gives you alot of good info.

 

i read the faq but i see alot of ppl saying for boosted applications that they all go sleeved and im just wondering basically what the stock sleeves are capable of ?

 

you would be safer to sleeve, esp boosting that much. But technically, its NOT need, but it wouldn't be smart.

 

running that much boost, there is a great chance of the engine not lasting long without sleeves. Defn go with sleeving with that sort of pressure going in.

 

I found using LONG sleeves when its cold outside keep my arms warm. Its not a new idea but something that has been mastered over time. In the old days it was just hard to make sleeves out of animal skin/fur.
Tank tops and sleeveless shirts are only good if you live in a nice warm climate. I like wearing tank tops so I can appreciate my tatoos!
Going sleeveless in a Chicago winter is just a no-no!

 

I'm running forge pistons in my FRM sleeves and there not mahle gold series pistons! there probe 87mm pistons custom coated for testing, and there is no problem with them at all I have 800 miles on them with no problem, and by the way it's 9:1 compression
http://www.imagestation.com/pi...3.jpg

http://www.imagestation.com/pi...d.jpg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdmboostedh22a &raquo;</TD></TR><TR><TD CLASS="quote">I'm running forge pistons in my FRM sleeves and there not mahle gold series pistons! there probe 87mm pistons custom coated for testing, and there is no problem with them at all I have 800 miles on them with no problem, and by the way it's 9:1 compression
http://www.imagestation.com/pi...3.jpg

http://www.imagestation.com/pi...d.jpg
</TD></TR></TABLE>

Give it time grasshopper!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by :=:NirVTEC:=: &raquo;</TD></TR><TR><TD CLASS="quote">Give it time grasshopper!
</TD></TR></TABLE>


lol

 

after 3 of the same setups i seen(locally) forged pistons on the h22 frm sleeves they didnt last long at all sorry jdmboostedh22a
your fucked

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by :=:NirVTEC:=: &raquo;</TD></TR><TR><TD CLASS="quote">
Give it time grasshopper!
</TD></TR></TABLE>



pistons manufacturers themselves will tell you not to do it...but the sleeves should hold up fine to high hp if you can find a piston strong enough that won't destroy them. cf has a way higher tensile strength than steel and can withstand presures at much higher temperatures than steel.

 

So are you telling him to use Forgerd slugs in FRM???

 

read it again!

i am implying that forged pistons will wear away frm sleeves

 

has anyone actually heard of someone making XXX.XX whp that actually cracked a FRM sleeve or damaged it?

i think people mistake the rings for being weak and just throw the cylinder walls in there as well.

 

the piston will fail or cause the sleeve to fail way before the sleeve itself fails...again, frm has a much higher tensile strength than aftermarket sleeves but it has different heat expansion characteristics which causes problems with forged pistons especially those containing low levels of silicone(which are also the best for high hp) because of their very high heat expansion.