98 GT help

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americanjesus

New Member

May 31, 2004

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NJ

Jul 22, 2004

#1

• Jul 22, 2004

• #1

I have a 98 GT auto. So far I've put on a mac catted H pipe and flowmaster american thunder cat back. Should I put headers on next, or will they not make a big improvement. I'm only 17 so im not planing on any to expensive mods. What would be the best next mods to do?

 

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BlackGT97

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Jun 1, 2004

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Jul 22, 2004

#2

• Jul 22, 2004

• #2

well even tho i haven't done them, your best bang for the buck in HP would be the PI swaps, probably the intake first, then heads and cams.

 

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BlackGT97

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Jun 1, 2004

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Jul 22, 2004

#3

• Jul 22, 2004

• #3

oh and btw, how does the mac midpipe sound with the american thunder? did you put on the american thunder first to get a sound for it and then put on the midpipe to see the difference in sound? or just both at the same time?

 

kboy262

Active Member

Apr 20, 2003

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26

Atlanta-Kennesaw

Jul 23, 2004

#4

• Jul 23, 2004

• #4

For the best bang for the buck do not do the LT. Gears are a big improvement. Suggest 4.10 for the auto. Also around the same cost as a good pair of LT. The PI intake with some aftermarket cams is big improvement also. I would not mess with the exhaust anymore until you can make the motor breath alot better.

 

9

98SteedaStang

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Dec 11, 2002

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Chicago Suburbs

Jul 23, 2004

#5

• Jul 23, 2004

• #5

If you get LT's you're gonna need a new h-pipe. I would pass on the LTs. Get gears!

 

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billyfe390

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Aug 18, 2003

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Jul 23, 2004

#6

• Jul 23, 2004

• #6

If you are planning to build up a 96-98 car start with the complete headswap at the same time longtubes then gears. That is the biggest bang for the buck probably 75-100 horse over stock depending on the parts.

 

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americanjesus

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May 31, 2004

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NJ

Jul 24, 2004

#7

• Jul 24, 2004

• #7

I bought the American Thunder then the H- Pipe. I have to buy part by part because all my money goes to gas, insurance, and aftermarket parts. It Sounds great though. If i got headers they would be shortys, so im guessing just leave my exhuast for now. If i changed gears, wouldn't I need to reprogram or get a new chip?

 

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98SteedaStang

Member

Dec 11, 2002

382

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Chicago Suburbs

Jul 24, 2004

#8

• Jul 24, 2004

• #8

No not for a '98, you just need a speedo gear. I wouldnt waste my money on shorties. Trust me you'll love gears. I went with a 3.73 and now I wish I would have went with a 4.10. So get 4.10s!!

 

BLK_ROUSH

Founding Member

Feb 5, 2000

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Newnan, GA

Jul 24, 2004

#9

• Jul 24, 2004

• #9

98SteedaStang said:

No not for a '98, you just need a speedo gear. I wouldnt waste my money on shorties. Trust me you'll love gears. I went with a 3.73 and now I wish I would have went with a 4.10. So get 4.10s!!

Click to expand...

Ditto. Gears and leave the exhaust alone .... for now.

Save up for the PI swap!

 

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americanjesus

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May 31, 2004

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NJ

Jul 26, 2004

#10

• Jul 26, 2004

• #10

Would 1999+ heads fit on my car or should I go aftermarket?

 

ProCharger GT

Member

Jun 3, 2004

153

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Cleveland

Jul 26, 2004

#11

• Jul 26, 2004

• #11

you really dont have a choice on cylinder heads... 99+ is the only type of head that will fit your car, other than the ones you already have. If your going to get PI's i would reccomend the Patriot Performance heads; you can get them ported and completely assembled (w/o cams, shipped to your door) for $1295. Or you could get the regular PI heads but if you decide to do some engine work to it later it might be a good idea to get the ported ones now and save yourself some time and money later on.

 

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Josh97GT

New Member

Apr 8, 2004

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Jul 26, 2004

#12

• Jul 26, 2004

• #12

99+ fit. But u should use 01+ because u can re use some parts.

 

85MustGT

Founding Member

Nov 8, 2001

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Occupied San Diego

Jul 26, 2004

#13

• Jul 26, 2004

• #13

Get the gears first you will be surprised!

 

ChadS98GT

Founding Member

Oct 22, 2001

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Parker, CO

Jul 26, 2004

#14

• Jul 26, 2004

• #14

I vote for gears also....get 4:10's for your auto....

 

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huesmann

Founding Member

Jun 21, 2002

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Jul 26, 2004

#15

• Jul 26, 2004

• #15

If you're 17, my suggestion is to learn to drive first. This is not a facetious comment. You will thank me and your parents and their insurance company will thank you.

 

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americanjesus

New Member

May 31, 2004

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NJ

Jul 28, 2004

#16

• Jul 28, 2004

• #16

How would a CAI, and a 70mm throttle body work? maybe underdrive pulley for a little extra power to

 

GTvert01

New Member

Nov 24, 2003

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West Plains, MO

Jul 28, 2004

#17

• Jul 28, 2004

• #17

I would hold off on that, and get the gears first.You will notice probably the biggest difference from them.After that, underdrives (I recommend Steeda) would be a pretty decent way to go as they are relatively cheap.

 

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americanjesus

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May 31, 2004

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NJ

Jul 29, 2004

#18

• Jul 29, 2004

• #18

you notice any problems with underdrive pulleys?

 

BlackenedSVT

Active Member

Jan 18, 2004

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New Jersey

Jul 29, 2004

#19

• Jul 29, 2004

• #19

I have the same car with the same mods...and i went with the 4.10 gears. Although, my speedo went WAY off (speed-cal it) and you also lose a LOT of top END. My top end WAS 150mph, now its like 120mph

- Jay

 

BlackenedSVT

Active Member

Jan 18, 2004

1,841

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New Jersey

Jul 29, 2004

#20

• Jul 29, 2004

• #20

huesmann said:

If you're 17, my suggestion is to learn to drive first. This is not a facetious comment. You will thank me and your parents and their insurance company will thank you.

Click to expand...

Hes right. I got my 98GT when i was 20, last year and dude...i was learning how to drive all over again. Going from my 98 F-150 to my mustang was rediculously different.

But if you still want to mod. Get 4.10 gears (if you are staying N/A - naturally aspired) otherwise get 3.73. Or you can get a STEEDA Timing adjuster.