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durability of JH block internals and going turbo
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I'd like to think 50k without failure is fair - it won't be a DD. Just a =
go-fast toy.
But that's my point - will forged pistons provide a greater margin of =
safety?
I mean, when I end up doing this, I'm going to do it right (fingers =
crossed) and have all the bases covered...who knows? With my luck, I'll =
probably have to learn the hard way once or twice in the process...
JT
----- Original Message -----=20
From: L F=20
To: Jeff Toomasson ; scirocco-l@scirocco.org=20
Sent: Monday, October 28, 2002 4:27 PM
Subject: Re: durability of JH block internals and going turbo
Jeff-
The stock pistons will be the weakest link in this turbo-chain.
Anything over about 5psi boost will evenually lead to broken pistons =
unless detonation is totally controlled/eliminated. As far as the rest =
of the internals reliably handling 200 hp....depends on on your =
definition of reliable. 1000 miles with no failure? 100,000miles with =
no failure?
Quantify here, son, quantify....
Larry
----- Original Message -----=20
From: Jeff Toomasson=20
To: scirocco-l@scirocco.org=20
Sent: Monday, October 28, 2002 12:46 PM
Subject: durability of JH block internals and going turbo
I was curious what the general consensus is on the durability of =
stock JH internals (i.e., crank, rods, pistons, etc.)
The reason I ask is that I have really no idea what rigors a JH =
block could withstand.=20
Given a rebuild, knifing the crank and balancing the internals - =
could the stock components RELIABLY handle ~200 whp and the ~15psi of =
boost required to get there?
I repeatedly see people going with new pistons, rods, etc., but I =
don't ever see anyone talk of the benefits (other than increasing bore) =
that those pistons are supposed to achieve...
TIA, JT
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<DIV><FONT face=3DArial size=3D2>I'd like to think 50k without failure =
is fair - it=20
won't be a DD. Just a go-fast toy.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>But that's my point - will forged =
pistons provide a=20
greater margin of safety?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I mean, when I end up doing this, I'm =
going to do=20
it right (fingers crossed) and have all the bases covered...who knows? =
With my=20
luck, I'll probably have to learn the hard way once or twice in the=20
process...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>JT</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Drocco16v@netzero.net href=3D"mailto:rocco16v@netzero.net";>L =
F</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Djtoomasson@yahoo.com=20
href=3D"mailto:jtoomasson@yahoo.com";>Jeff Toomasson</A> ; <A=20
title=3Dscirocco-l@scirocco.org=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, October 28, 2002 =
4:27=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: durability of JH =
block=20
internals and going turbo</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Jeff-</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> The stock pistons will be the =
weakest link=20
in this turbo-chain.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Anything over about 5psi boost will =
evenually=20
lead to broken pistons unless detonation is totally =
controlled/eliminated. As=20
far as the rest of the internals reliably handling 200 hp....depends =
on on=20
your definition of reliable. 1000 miles with no =
failure? =20
100,000miles with no failure?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Quantify here, son, =
quantify....</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Larry</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Djtoomasson@yahoo.com =
href=3D"mailto:jtoomasson@yahoo.com";>Jeff=20
Toomasson</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dscirocco-l@scirocco.org=20
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, October 28, =
2002 12:46=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> durability of JH =
block=20
internals and going turbo</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I was curious what the general =
consensus is on=20
the durability of stock JH internals (i.e., crank, rods, =
pistons,=20
etc.)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>The reason I ask is that I have =
really no idea=20
what rigors a JH block could withstand. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Given a rebuild, knifing the crank =
and=20
balancing the internals - could the stock components RELIABLY handle =
~200=20
whp and the ~15psi of boost required to get there?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I repeatedly see people going with =
new pistons,=20
rods, etc., but I don't ever see anyone talk of the benefits (other =
than=20
increasing bore) that those pistons are supposed to =
achieve...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>TIA,=20
JT</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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