Date: Sat, 17 Feb 1996 23:42:40 -0500
From: MDaily632@aol.com
Subject: ISV mods
Jan,
See attached text file for more info.
BTW, somehow I received your message re:keyless alarm addressed to
Vreihen@aol.com, I don't know if he/she got it or not, but it ended up in my
mail, too.
Also, yes I would really appreciate it if you could fax me the flyer from
Autotech. Please fax to (206)763-1324. Please put it to my attention, as
others share the fax machine.
Mike
--PART.BOUNDARY.0.25008.mail04.mail.aol.com.824618559
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This is a plug. As such, please do not post it in whole or in part to an=
y discussion group or forum where it would be considered inappropriate du=
e to commercial content. It is not my intention to slam Neuspeed, New Di=
mensions, AutoThority, or any other of the fine aftermarket suppliers dev=
eloping VW performance parts. The bottom line is simple: the concept be=
hind the Neuspeed Gen2 kit is good. It works, but you do not have to spe=
nd $200 to get the same effect. =
=0D
A brief explanation of Neuspeed's Gen2 kit:
=0D
While it is called the "HP2 Fuel Enrichment Kit" (also "Gen2"), there is =
more to the story. Fuel enrichment is not the key ingredient. The Gen2 =
modifications increase boost levels by eliminating pressure losses caused=
by leakage through the Idle Stabilizer Valve. When the motor is idling,=
the ISV regulates air flow from the bypass tube to the intake manifold t=
o control idle speed. Under boost conditions, the ISV can reduce boost l=
evels by bleeding boost pressure from the manifold into the bypass tube. =
One unfortunate side effect of the stock set-up is that the bled air bei=
ng returned to the inlet of the G-60 is hot (from having already gone thr=
ough the G-lader at least once), and increases the charge temperature (wh=
ich reduces power output and increases chances of detonation).
=0D
The Gen2 kit (and others) reroutes the ISV, disconnecting it from the byp=
ass tube. The immediate gains are noticeable. A G-60 motor with the sma=
ll blower pulley will make only 14.5psi max. with the stock ISV routing.=
A leaking ISV may bleed that down to as low as 10psi. The same pulley =
with the ISV rerouted makes 16.5psi max. =
=0D
The Gen2 kit also comes with a "fuel enrichment" system. It is the same =
as the enrichment system that has always come with their HP kits. It tie=
s into the factory's system. The stock G-60 motor has fuel enrichment th=
at is activated at full throttle only. Neuspeed's "hobbs" switch parall=
els the full throttle switch, activating the enrichment by boost rather t=
han throttle position. There is some discussion as to whether or not thi=
s serves a real purpose. A boost gauge shows that it is near impossible =
to get more than a few psi of boost without having the throttle wide open=
(even with the ISV rerouted).
=0D
Is there a down side to the Gen2 kit? Not if the engine is in decent sha=
pe to begin with. Neuspeed claims it adds 17hp. Anything that adds powe=
r may have a slight impact on longevity, but the 1.8 block and head are v=
ery sturdy from the start. The kit does not seem to increase oil or wate=
r temperatures at all. It is a great may to get more from the G-60 witho=
ut spinning it any faster. If your ISV was developing problems, the ISV =
reroute should improve your idle. Neuspeed has gotten an exemption numbe=
r to make their kit legal in all 50 states. It should have no effect on =
emissions test result, and is virtually unnoticeable during a visual insp=
ection of the engine compartment. =
=0D
If you have a Neuspeed HP1 kit and want to upgrade to HP2 (Gen2), all you=
need is the ISV reroute parts. The ISV reroute can be added to any G-60=
motor, regardless of previous modification. If you are running an AutoT=
hority Stage1, 2, or 3 kit you can add the ISV reroute. The AT kits that=
included the high pressure Porsche 944 fuel regulator already provide fu=
el enrichment. If you do not have any aftermarket enrichment you have tw=
o choices. One school of thought is to do without enrichment. Again, it=
is rare to have a high boost, part throttle situation which is when the =
"hobbs" style of enrichment is activated. Without the "hobbs" switch, th=
is situation could result in the mixture getting lean and causing the kno=
ck sensor to retard the timing. The drop in power would probably cause y=
ou to open the throttle all the way, engaging the factory enrichment swit=
ch. The other option is simple. Buy a "hobbs" switch (from NAPA) and wi=
re it to the factory throttle switch. Put small plastic "T" in a manifol=
d pressure line to sense boost level and suddenly you have boost sensing =
fuel enrichment.
=0D
Hopefully you now have an understanding of what this plumbing trick is al=
l about. Rerouting the ISV is a neat way to get more power at little cos=
t. The fuel enrichment system is already in place on many cars. If you =
do not have it already, it may not be required. You may want to wait and=
try the ISV reroute before determining if you want to add the "hobbs" sw=
itch.
=0D
The hard sell:
=0D
For $45, I will sell you a complete kit of everything you need to install=
the ISV reroute. It works on all G-60 Corrados and other G-60 equipped =
motors which have the ISV. It comes with very easy instructions. If you=
know how to use a screwdriver, installation takes about 30 minutes. The=
re are not very many pieces. The most important component is the junctio=
n fitting in the boost tube. A number of people reported problems with t=
he fitting supplied by Neuspeed. Some were sloppily made and required a =
lot of clean up and de-burring before installation. I take great care in=
fabricating the fitting that comes in my kit. It is ready to install ri=
ght out of the box. My kit also includes complete instructions for insta=
lling a "hobbs" switch enrichment system on your car if you want to add i=
t. I include a list of parts that you can get at your local NAPA store (=
about $30 in all); installation is easy and takes about 20 minutes.
=0D
I have not sought an exemption number, so you get this disclaimer: Parts=
may be considered not legal for use on pollution controlled vehicles -- =
check local laws. In WA, we have to emission test every other year. Vis=
uals are done randomly on cars passing the sniffer test. ISV mods will g=
o undetected. If you are unsure, you could remove it for the test. It t=
akes about 5 minutes to remove/replace after the initial installation.
=0D
How to order my kit:
=0D
Send $45.00 + shipping ($4 for UPS or $7 for US-Mail) to:
=0D
Michael Daily
2856 SW Adams, Suite B
Seattle, WA 98126
=0D
Please remember to include your shipping address (no UPS to PO Box) and a=
daytime phone number. I fabricate the fittings once a week, so you migh=
t want to e-mail me and tell me you have set in an o=
rder. That way I can reserve one from that week's batch. Otherwise ther=
e can be up to a six day delay in getting it out to you. You do not have=
to e-mail me, but if you do I can usually ship a kit to you the day afte=
r I receive your order.
=0D
For international orders:
Outside of USA, send (US)$48 and I will ship via UPS international servic=
e. UPS will collect freight, duty, and taxes at time of delivery. The e=
xtra $3 is for filling out the stack of necessary paperwork.
=0D