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Forced Induction ?: X-Flow versus JH head
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Can't imagine why hydraulic lifters would be a detriment.
With a turbo for street use you don't need or want a wild cam and the =
hydraulic lifters are good for more than 6500 RPM which is adequate =
considering the engine Jeff seems to be envisioning.
Big gain in port flow over the non-crossflow and the installation =
benefits, from my experience, are huge.
Just to elaborate. I recently did an ABA swap into my nephew's Jetta. =
Converted the car from CIS to Megasquirt at the same time. If you use =
the ABA head and intake then all the wiring and sensors are in place to =
wire in the aftermarket EFI. Just wire in the EFI to the engine harness =
connector. Piece of cake compared to rewiring the entire engine.
Lot more room for the turbo since you can turn it over with the turbine =
housing scrolling upwards and the downpipe can be much larger and free =
flowing with the better turbo placement.
Not having to build an adapter for the TB or scrunch a 2" to 3" silicone =
tube over the TB is also a big plus.
Cooler intake, better flowing ports, better flowing downpipe. It all =
adds up.
Dan
----- Original Message -----=20
From: scirocco=20
To: Jeff Toomasson ; scirocco-l@scirocco.org=20
Sent: Sunday, February 16, 2003 9:44 AM
Subject: Re: Forced Induction ?: X-Flow versus JH head
I'd stick with the JH head. What you would gain from the cross flow =
design you would more than loose from the hydraulic lifters. =20
----- Original Message -----=20
From: Jeff Toomasson=20
To: scirocco-l@scirocco.org=20
Sent: Saturday, February 15, 2003 10:53 PM
Subject: Forced Induction ?: X-Flow versus JH head
I posted this question on the Vortex FI board and got =
less-than-desirable answers. Maybe you guys can help:
I have a complete JH engine that was rebuilt ~15k miles ago by the =
PO. But it seems apparent to me that a X-flow head would offer a better =
advantage in terms of distance from the heat of the exhaust manifold =
versus the JH head (not to mention supposed closer proximity to any IC =
piping...)
But using a x-flow head in an mk1 scirocco would most likely require =
some reasonably extensive modifications to the intake and throttle =
linkages, right?=20
It's not that I'd be opposed to that or the $$ required if the =
benefit was significant enough, I'm just curious if the bang is worth =
the buck in this case... The goal is:=20
~200hp (streetable (@ ~15psi?)), scirocco 16v throttle body, A5KTQ =
IC, and SDS (most likely) EFI
Thanks in advance, JT
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<DIV><FONT face=3DArial size=3D2>Can't imagine why hydraulic lifters =
would be a=20
detriment.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>With a turbo for street use you don't =
need or want=20
a wild cam and the hydraulic lifters are good for more than 6500 RPM =
which is=20
adequate considering the engine Jeff seems to be =
envisioning.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Big gain in port flow over the =
non-crossflow and=20
the installation benefits, from my experience, are huge.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Just to elaborate. I recently did an =
ABA swap into=20
my nephew's Jetta. Converted the car from CIS to Megasquirt at the same =
time. If=20
you use the ABA head and intake then all the wiring and sensors are in =
place to=20
wire in the aftermarket EFI. Just wire in the EFI to the engine harness=20
connector. Piece of cake compared to rewiring the entire =
engine.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Lot more room for the turbo since you =
can turn it=20
over with the turbine housing scrolling upwards and the downpipe can be =
much=20
larger and free flowing with the better turbo placement.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Not having to build an adapter for the =
TB or=20
scrunch a 2" to 3" silicone tube over the TB is also a big =
plus.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Cooler intake, better flowing ports, =
better flowing=20
downpipe. It all adds up.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Dan</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-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 href=3D"mailto:scirocco-al@insight.rr.com"=20
title=3Dscirocco-al@insight.rr.com>scirocco</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
href=3D"mailto:jtoomasson@yahoo.com"=20
title=3Djtoomasson@yahoo.com>Jeff Toomasson</A> ; <A=20
href=3D"mailto:scirocco-l@scirocco.org"=20
title=3Dscirocco-l@scirocco.org>scirocco-l@scirocco.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, February 16, 2003 =
9:44=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: Forced Induction =
?: X-Flow=20
versus JH head</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I'd stick with the JH head. =
What you would=20
gain from the cross flow design you would more than loose from the =
hydraulic=20
lifters. </FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-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 href=3D"mailto:jtoomasson@yahoo.com"; =
title=3Djtoomasson@yahoo.com>Jeff=20
Toomasson</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:scirocco-l@scirocco.org"=20
title=3Dscirocco-l@scirocco.org>scirocco-l@scirocco.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, February 15, =
2003 10:53=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Forced Induction ?: =
X-Flow=20
versus JH head</DIV>
<DIV><BR></DIV>
<P>I posted this question on the Vortex FI board and got =
less-than-desirable=20
answers. Maybe you guys can help:</P>
<P>I have a complete JH engine that was rebuilt ~15k miles ago =
by the=20
PO. But it seems apparent to me that a X-flow head would offer a =
better=20
advantage in terms of distance from the heat of the exhaust manifold =
versus=20
the JH head (not to mention supposed closer proximity to any IC=20
piping...)</P>
<P>But using a x-flow head in an mk1 scirocco would most likely =
require some=20
reasonably extensive modifications to the intake and throttle =
linkages,=20
right?=20
<P>It's not that I'd be opposed to that or the $$ required if the =
benefit=20
was significant enough, I'm just curious if the bang is worth the =
buck in=20
this case... <IMG border=3D0 name=3Dicon=20
src=3D"http://www.vwvortex.com/vwbb/sly.gif";> The goal is:=20
<P>~200hp (streetable (@ ~15psi?)), scirocco 16v throttle body, =
A5KTQ IC,=20
and SDS (most likely) EFI</P>
<P>Thanks in advance, JT</P>
<P><BR>
<HR SIZE=3D1>
Do you Yahoo!?<BR><A=20
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href=3D"http://rd.yahoo.com/O=3D1/I=3Dbrandr/vday03/text/flow/*http://sho=
pping.yahoo.com/shop?d=3Dbrowse&id=3D20146735">Yahoo!=20
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