[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

durability of JH block internals and going turbo



This is a multi-part message in MIME format.

------=_NextPart_000_0348_01C27EA1.82B30540
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

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

------=_NextPart_000_0348_01C27EA1.82B30540
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<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>&nbsp;</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>&nbsp;</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>&nbsp;</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>&nbsp; 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.&nbsp;&nbsp; 1000 miles with no =
failure?&nbsp;=20
  100,000miles with no failure?</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>Quantify here, son, =
quantify....</FONT></DIV>
  <DIV>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2>Larry</FONT></DIV>
  <DIV>&nbsp;</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&nbsp;stock JH internals&nbsp;(i.e., crank, rods, =
pistons,=20
    etc.)</FONT></DIV>
    <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</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>&nbsp;</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&nbsp;the ~15psi of boost required to get there?</FONT></DIV>
    <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</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>&nbsp;</DIV>
    <DIV><FONT face=3DArial size=3D2>TIA,=20
JT</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>

------=_NextPart_000_0348_01C27EA1.82B30540--