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Frequently Asked Questions
Q. How much
horsepower can I expect from an HP kit with my stock engine?
A. With the
HP
Stage I
turbo kit and your stock 5.0 engine, you can expect to make
from about 400 rear wheel horsepower (rwhp) to 600 rwhp.
Q. What if I
want more horsepower than is available with the Stage I Turbo
kit?
A. With the
HP
Stage II
turbo kit, depending on the options you choose, you can expect
from 600-800 rwhp, and the higher stage
kits can deliver well in excess of 1,000+ rwhp. We can help
you decide which options are best for your application and
advise you how to set up your car for maximum performance. HP
Turbo kits are upgradeable if you want to increase power in
the future.
Q. Do you sell
turbo components separately?
A. Yes. We sell
most of the major components of the turbo kits separately.
Just call or email us for details.
Q. Can I build
a "custom" turbo kit from HP components?
A. Yes. Although
HP turbo kits are engineered to achieve maximum performance
for the lowest cost, many of our customers do this in order to
better tailor the turbo kit to their cars and the performance
they want from them. We will be happy to assist you with
advice regarding matching up the proper components of your
turbo kit for best performance.
Q. How hard is
the turbo kit to install?
A. Installation
can be done by anyone with basic tools and skills following
the detailed instruction manual included with the turbo kit.
Installation requires no internal modifications to your stock
engine. Certain kits may require very minor passenger inner
fender well modifications ('79-'93 Mustangs), and the battery
can remain in its stock location. The turbo kit is designed
to allow retaining all the factory-installed accessories
(except the smog pump on '79-'93 Mustangs) including the power
steering pump, alternator and air conditioning compressor.
Q. What else
do I have to buy to install an HP turbo kit?
A. Nothing.
Everything you will need is included in the turbo kit, down to
the last nut, bolt and fastener. You will need your own
tools, of course, but there are no special tools required.
Q. Does HP
offer turbo kit installation services?
A. Yes. We will
be happy to quote you a price HP to install your turbo kit at
their facility. Just call or email us
with your request.
Q. Does HP
offer turbo kits for other cars?
A. Yes. In
addition to all years of V8 Mustangs after 1979, HP currently
offers Corvette turbo kits, Camaro turbo kits, Firebird turbo
kits, Impala SS kits and Acura NSX kits. Check back often on
our
turbo kits page
to see what else is new.
Q. What if I
want a turbo kit for a car that HP doesn't offer a turbo kit
for?
A. HP started out
by building custom turbo kits on a one-by-one basis. Over
time, they developed the best way to build turbo kits for
maximum performance. Those custom kits, after numerous
upgrades, are now offered as HP turbo kits. However, HP
continues to improve their existing products and develop new
products and, on a first-come, first-served basis, they will
build a custom turbo kit for your car. If you are the
first customer to request a turbo kit for your make and model
car (one that HP does not currently offer a turbo kit for), HP
will build a custom turbo kit for your car and provide free
installation and free dyno testing. To take advantage of this
offer, you must bring or ship your car to HP's facility.
Expect to leave your car with HP for approximately 12 weeks.
If you are interested, call or email
us with your request and we will provide preliminary
pricing and scheduling for your new custom turbo kit!
Q. Why does HP
ceramic coat the tubing in their turbo kits? The other turbo
kit companies I have seen don't do this as standard practice,
if at all.
A. HP has the
headers and all the tubing on their turbo kits coated because
the coating reduces under-hood temperatures, increases
longevity of the tubing and best of all, looks fantastic! The
coating is done by Jet Hot, the premier ceramic coating
company in the US and comes with a 3-year unconditional
guarantee.
Q. How long
will it take to get my turbo kit after I place an order?
A. Your HP kit
should ship from our facilities in about 6-8 weeks. The
headers and tubing parts of each kit are shipped to Jet-Hot,
where they have a turnaround time of 5-10 days to ship the
tubing kit on to you after the coating is done. HP will ship
the balance of the turbo kit that is not coated to you on the
same day they ship your tubing to Jet Hot. If there is any
change at all to this HP will contact you immediately. It is
our goal to deliver turbo kits in a timely fashion.
Q. Does HP
warranty their turbo kits?
A. All HP turbo
kits carry a 1-year parts and workmanship warranty, a 3-year
ceramic coating warranty and a limited lifetime warranty on
headers and all tubing components.
Q. Do I have
to modify my engine before I can install a turbo kit?
A. No. The
HP Stage I
turbo kits are designed to work with your completely stock
engine. No changes to your engine are necessary. In fact,
certain changes to your engine could be detrimental, such as
installing pistons to raise the compression of the engine.
Q. Do the
modifications I have already done to my engine have to be
changed?
A. It all depends
on what you have done. Most engine modifications will work
just fine with a turbo kit. Some examples of modifications
that may have to be changed are high compression pistons,
exhaust headers, many nitrous setups and superchargers
(obviously).
Q. What are
some of the positive modifications that I can do to my engine?
A. Strengthening
your engine with forged pistons, forged rods, a forged
crankshaft, a main bearing cap girdle or a stronger engine
block (like an "R" or DART block) will allow you to run more
boost, resulting in more horsepower and torque. Aftermarket
heads, aftermarket intakes or other aftermarket parts designed
to increase air flow, including porting and polishing will
also enhance performance. High-energy ignition systems also
improve performance. Actually, most of the things you would
do to increase performance from a naturally aspirated engine
(except raising compression too high) will also increase
performance of your turbocharged engine. We will be happy to
recommend the modifications that will best suit your
performance goals.
Q. Do I need
to be concerned about my drive train when I put a turbo kit on
my car?
A. Factory stock
engines were designed to produce much lower horsepower and
torque than is possible with a turbocharger system. As a
result, turbocharged engines are subject to more stress, and
components can fail if proper precautions are not taken. Your
230 hp stock Mustang wasn't designed to produce 650 hp, and as
is always true, the weakest link will fail first. If you are
going to run a base
HP Stage I
kit at recommended boost levels, then most likely things will
be OK. However, if you want to get into the higher realms of
serious horsepower (650+ hp) and move up to the Stage II ,
Stage II or Stage III , Race Kits or Custom
Turbo
kits, then you should also consider upgrading your
transmission, rear end and/or suspension components.
Q. Does HP
build a twin-turbo kit?
A. Whether we
build a twin or a single system is decided in the design phase
and is mainly determined by space requirements. HP builds a
twin setup for the 1996-2004 Mustangs and 1996-2007 Corvettes,
but that is only due to the limited space available on these
cars for a single larger turbo. With today's advanced
turbocharger technology and by correctly sizing the single
turbo for the application, turbo lag is eliminated and is not
a problem HP has with their systems. Of course, sometimes
demand dictates that we take a look at doing a twin turbo
system for a specific application. Bottom line, if you can
dream it, we can probably build it.
Q. What if
don't find an answer to my question on this page?
A. Simple. Call
us at 505-623-2555. We try
to answer all inquiries within 24 hours.
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