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Car Forum / Ford / Ford Mustang / May 2005

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Query - 2004 GT performance upgrade options (longish)

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Bob - 09 May 2005 04:35 GMT
Greetings all,

I've read a few posts in here and got some good information, but
mostly now have more questions.  Hopefully someone here can help.  I'm
sure someone will ask, so I'l try to answer the question 'What do you
want' or 'why do you want to upgrade'?

I'm simply looking to get more out of what I bought.  We're not going
to race the car; perhaps take it to the track this summer to get some
timings, but not much else.  My insurance (NJ) is high enough, thank
you.  If this car starts out at 210HP, I'd like to add 40-80HP - just
enough to be a little faster than another stock 2004.  (oh, and
modified exhausts sound cool).  We got our Mustang (manual
transmission) about 6 months ago and it still runs very nicely.  About
9k miles on it so far.  The most common  upgrades I'm aware of (read:
I've read about here, mostly) are:

K&N performance kit ($170 is the best $ I've seen)
High Flow Upper Plenum ($149?)
Some form of exhaust kit ($349-600)
Gear upgrade (?)
Nitrous & Supercharger (not currently in consideration)

I'm leaning toward the exhaust or K&N kit as a first step. I also plan
to remove the air-intake silencer at the same time (assuming that's
not part of the K&N upgrade).  I can't seem to find the gear upgrade
online.  Any links for that?

To show my naivet?, I have a question - What is the difference between
a DOHC & SOHC engine?  

I'll pause here so you can finish shaking your head in disgust...

Obviously I understand the D is for Dual (overhead cam), whereas the S
is Single.  Is there an upgrade from the SOHC to DOHC without
replacing the entire engine?  This isn't something I'm considering,
I'm just the curious type.  Feel free to simply point me to a
website-for-dummies.

I'm also looking for an interface for a laptop to connect to the
computer.  I'm not too familiar with this, so I'm not sure what's
available.  I know of Tweecer.com; perhaps there's something better
out there?

I'm also looking for the best place to buy.  I buy a lot online and
I've found a couple sites (summitracing, mustangwarehouse,
fordracingparts.com) - any suggestions on good websites?  Or is it
better to buy these parts local or from some catalog?  I'd prefer to
find one place for all my upgrade needs, but it's not necessary.  I
live in Northern NJ if it matters.

What about brands?  I see Flowmaster, BBK, Borla, etc exhaust systems.
Is one dramatically better than another?  I'm looking solely for
performance, so I don't want huge 'cans' at the rear of my car.  I
don't want an 'amplifier' on my exhaust - it should be naturally loud
:)

What about spark plug wires?  Is it really worth the extra $ for the
'good' ones?

Thanks for taking the time to read all this - any information would be
greatly appreciated.  If you plan to tell me to 'trade it in', feel
free to keep it to yourself.
Bob Willard - 09 May 2005 12:00 GMT
> I'm simply looking to get more out of what I bought.  We're not going
> to race the car; perhaps take it to the track this summer to get some
[quoted text clipped - 5 lines]
> 9k miles on it so far.  The most common  upgrades I'm aware of (read:
> I've read about here, mostly) are:

The '04 base V6 '04 Mustang has 190HP.  The '04 Mustang GT has 260HP.
Do you know which you have?  IMHO, if you wanted performance but bought
the V6, then you made a mistake which can best be corrected by a
trade-in on the '05 Mustang GT.
Signature

Cheers, Bob

japhar81 - 09 May 2005 14:58 GMT
> Greetings all,
>
[quoted text clipped - 12 lines]
> 9k miles on it so far.  The most common  upgrades I'm aware of (read:
> I've read about here, mostly) are:

Like Bob said, you either have 190 or 260 stock. If you have 260, youre
already at that 210+40-80 number.

> K&N performance kit ($170 is the best $ I've seen)
> High Flow Upper Plenum ($149?)
[quoted text clipped - 6 lines]
> not part of the K&N upgrade).  I can't seem to find the gear upgrade
> online.  Any links for that?

You wont get much more than 1-2hp with the K&N kit without other mods. The
exhaust may net you 4-5, some people claim 10 (but it sounds really nice).
Read the thread on 4/28 by BigAl (2001 GT Performance Mods) to get an idea
of why that is. You have to do engine mods for the K&N or exhaust to make a
difference.

> To show my naivet?, I have a question - What is the difference between
> a DOHC & SOHC engine?
[quoted text clipped - 6 lines]
> I'm just the curious type.  Feel free to simply point me to a
> website-for-dummies.

In a SOC engine, one cam drives the inlet and exhaust valves. In a DOC one
cam runs the inlet, and one cam runs the exhaust side. Having two cams gives
you more flexability and control over the opening/closing of the various
valves, thus, more power and/or better gas milage.

I've never heard of an upgrade... Its probably cheaper/faster/easier to just
swap the engine.

> I'm also looking for an interface for a laptop to connect to the
> computer.  I'm not too familiar with this, so I'm not sure what's
> available.  I know of Tweecer.com; perhaps there's something better
> out there?

You want an OBD-II interface. http://www.vitalengineering.co.uk/ sells a
beautiful bluetooth deal that you can just leave plugged in and have your
laptop connect to it wirelessly. Works great, and has real-time gauges too
if you're into that sort of thing.

> I'm also looking for the best place to buy.  I buy a lot online and
> I've found a couple sites (summitracing, mustangwarehouse,
> fordracingparts.com) - any suggestions on good websites?  Or is it
> better to buy these parts local or from some catalog?  I'd prefer to
> find one place for all my upgrade needs, but it's not necessary.  I
> live in Northern NJ if it matters.

Youll always get better pricing online. That said, shop around. Best price
usually wins for me.

> What about brands?  I see Flowmaster, BBK, Borla, etc exhaust systems.
> Is one dramatically better than another?  I'm looking solely for
> performance, so I don't want huge 'cans' at the rear of my car.  I
> don't want an 'amplifier' on my exhaust - it should be naturally loud
> :)

Single exhaust or dual (i.e. do you have a GT?). I've heard that BBKs last
longer than Borla. I usually buy flowmaster myself. It really comes down to
what sounds best to you.

> What about spark plug wires?  Is it really worth the extra $ for the
> 'good' ones?

In my opinion, unless you're reworking alot of the engine itself, no.

> Thanks for taking the time to read all this - any information would be
> greatly appreciated.  If you plan to tell me to 'trade it in', feel
> free to keep it to yourself.

I wont tell you to trade it in, but if you did buy a V6, keep in mind youre
going to spend alot more cash getting it up to the performance of a GT than
you would have spent just paying the extra money up front and buying a GT.

Then again, its alot more fun taking a V6 and doing it all yourself. Again,
if youre into that sort of thing.
Bob - 09 May 2005 18:19 GMT
>> Greetings all,
>>
[quoted text clipped - 97 lines]
>Then again, its alot more fun taking a V6 and doing it all yourself. Again,
>if youre into that sort of thing.

My bad - it's the GT (V8) - not sure why I had 210 stuck in my head.
It sounds like getting another 40 HP is a lot more work than I had
originally anticipated.  I'd be willing to settle for a couple
upgrades & a cooler sounding exhaust though.

In terms of sound though - how can you know what one sounds like
compared to another?  Surely I would be out of my mind to think that
one of these websites would have MP3's of their exhausts (though that
would be cool, in a nerdy kind of way).
japhar81 - 09 May 2005 18:49 GMT
>>> Greetings all,
>>>
[quoted text clipped - 109 lines]
> originally anticipated.  I'd be willing to settle for a couple
> upgrades & a cooler sounding exhaust though.

on a GT, its not that hard to hit 300. Get a chip/programmer, and the K&N,
you should get pretty good results..

> In terms of sound though - how can you know what one sounds like
> compared to another?  Surely I would be out of my mind to think that
> one of these websites would have MP3's of their exhausts (though that
> would be cool, in a nerdy kind of way).

Actually, there are;
http://www.proficientperformance.com/sound-clips.php
http://www.proficientperformance.com/sound-clips.php

google mustang exhaust mp3 for more...
Bob - 09 May 2005 20:24 GMT
>>>> Greetings all,
>>>>
[quoted text clipped - 123 lines]
>
>google mustang exhaust mp3 for more...

awesome - thanks much
me - 09 May 2005 21:17 GMT
>>> Greetings all,
>>>
[quoted text clipped - 102 lines]
>originally anticipated.  I'd be willing to settle for a couple
>upgrades & a cooler sounding exhaust though.

The pre-99 GT's were rated at 210 hp.

>In terms of sound though - how can you know what one sounds like
>compared to another?  Surely I would be out of my mind to think that
>one of these websites would have MP3's of their exhausts (though that
>would be cool, in a nerdy kind of way).
memset@recorddeal.com - 09 May 2005 21:21 GMT
No they weren't. My 98 GT is rated 225 @ 4750 RPM at the flywheel. IIRC,
96-97 were 215hp.. maybe even 94-97.

-Mike

--
Melt away the Cellulite with Cellulean!
http://www.MeltAwayCellulite.com/

> >>> Greetings all,
> >>>
[quoted text clipped - 109 lines]
> >one of these websites would have MP3's of their exhausts (though that
> >would be cool, in a nerdy kind of way).
Bob Willard - 09 May 2005 23:09 GMT
> The pre-99 GT's were rated at 210 hp.

Sounds right for the '97 GT, but my '98 is rated at 225HP.
Signature

Cheers, Bob

me - 09 May 2005 23:27 GMT
>> The pre-99 GT's were rated at 210 hp.
>
>Sounds right for the '97 GT, but my '98 is rated at 225HP.
You're right about 98
82 157hp
83-84 175hp
85 210 hp
86 200hp
87-92 225hp
93 205hp
94-97 215hp
98 225hp
99-04 260hp
gjt - 11 May 2005 01:59 GMT
Bob:

I have had two 96 GT convertibles.  On the first one, I put an off road
H pipe (no cats) and two chamber flowmasters.  Sounded good, way too
loud for an old fart like me driving around in a fliptop.

I then put the factory H pipe (six cats) with the two chamber flows. I
didn't care for the sound.  The car had a "tin canny" type sound.

On my third try, one guy suggested that I try the factory H pipe with
straight pipes (no mufflers at all) out the back.  The factory H pipe
with six cats provides plenty of muffler and does not affect the oxygen
sensors.  Has a pretty good throaty sound.  If you romp on it a bit, it
barks pretty well.

As soon as I got my second 96 GT vert, the first thing I did was drop
the factory GT mufflers and replaced with the straight pipes.  Not a bad
sound and at a minimum cost.

"GT's GT"

> Greetings all,
>
[quoted text clipped - 59 lines]
> greatly appreciated.  If you plan to tell me to 'trade it in', feel
> free to keep it to yourself.
memset@recorddeal.com - 11 May 2005 02:20 GMT
I've taken off the factory mufflers & replaced with 2.25" exhaust tubing...
sounds ok, has a real nice "bite" to it... but not throaty or bassy enough
for me. Try 1 flowmaster & 1 straight pipe.. pretty unique sound &
definitely has a bite to it.

-Mike

--
Melt away the Cellulite with Cellulean!
http://www.MeltAwayCellulite.com/

> Bob:
>
[quoted text clipped - 80 lines]
> > greatly appreciated.  If you plan to tell me to 'trade it in', feel
> > free to keep it to yourself.
memset@recorddeal.com - 11 May 2005 02:23 GMT
Oh.. and be warned.. drone city :P.

-Mike

--
Melt away the Cellulite with Cellulean!
http://www.MeltAwayCellulite.com/

> I've taken off the factory mufflers & replaced with 2.25" exhaust tubing...
> sounds ok, has a real nice "bite" to it... but not throaty or bassy enough
[quoted text clipped - 91 lines]
> > > greatly appreciated.  If you plan to tell me to 'trade it in', feel
> > > free to keep it to yourself.
mustangGT_00 - 11 May 2005 08:26 GMT
I took the 4 cats out of the stock H-pipe, and put flowmaster mufflers
2.25" on 00 GT. it sounds really nice and loud enough.
memset@recorddeal.com - 11 May 2005 09:23 GMT
Emissions. It's our air too, bro.

-Mike

--
Melt away the Cellulite with Cellulean!
http://www.MeltAwayCellulite.com/

> I took the 4 cats out of the stock H-pipe, and put flowmaster mufflers
> 2.25" on 00 GT. it sounds really nice and loud enough.
Bob - 12 May 2005 04:11 GMT
>Emissions. It's our air too, bro.
>
>-Mike

Thanks for all the follow-ups - once I actually buy something &
install I'll post a new msg with my results.

Bob
 
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