Hi, got a 1991 all stock conv GT and trying to keep it factory as much as possible but was wondering what would be simple upgrades to get a bit more HP or upgrade any things that would benefit the engine in 2011 technology that in 1991 wasn't that great. Oh, an by the way its a 5 speed as well and 20k miles. Thanks.
1991 GT Conv ALL STOCK what should upgrade?
- Thread starter Mafiozi
- Start date
Holy s*** 20k miles! I wouldn't do anything crazy, so what Bone just mentioned. If you do exhaust do NOT cut the catback off. I sold a stock GT catback for $175 because people are restoring these cars. All you have to do is unhook the quads to lower the rear more and take it out in once piece (per side).IMHO keep your stock parts in case you decide to sell the car. Easy mods are remove intake silencer, drop in filter, advance the timing, pulleys.
Yes keep it stock..
But two easy things you should change that will make a big difference.
Get an aluminum driveshaft, it's lighter than the steel stock one and since it's rotating mass & before the rear diff you'll get better acceleration.
And more importantly change the mass air sensor with one form a 93 cobra, the stock 89-93 is very restrictive, they upgraded it in the 93 cobra and then in every Mustang in '94 but the 94 has a different housing, The 93 cobra mas is calibrated for the stock GT 19lbs injectors (even though the cobra had 24s, its computer compensated) You could get one on ebay for $69 and it takes 10 mins to change.
You'll feel the difference the second you drive it...
Guess which one's which
Here's the Cobra unit in my '91GT
__________________
But two easy things you should change that will make a big difference.
Get an aluminum driveshaft, it's lighter than the steel stock one and since it's rotating mass & before the rear diff you'll get better acceleration.
And more importantly change the mass air sensor with one form a 93 cobra, the stock 89-93 is very restrictive, they upgraded it in the 93 cobra and then in every Mustang in '94 but the 94 has a different housing, The 93 cobra mas is calibrated for the stock GT 19lbs injectors (even though the cobra had 24s, its computer compensated) You could get one on ebay for $69 and it takes 10 mins to change.
You'll feel the difference the second you drive it...
Guess which one's which
Here's the Cobra unit in my '91GT
__________________
Thanks for the great info but I have no clue of any of the mods your all talking about. I will keep it a virgin and I think there is something special about the old school GT's once left untouched. The most I was thinking was changing the cold air intake and if so what and which one should I get and does it really make a difference. A lot of people are saying it doesn't really do much maybe 5hp if your lucky. The only thing changed in the car would be the radio (cd player) and I believe the pipes they sound sick really quiet non of that loud crap...prrrr's like a silent beast. Maybe nothing was done and its the stock system. How do you post picts of it here? thanks
The stock airbox is the best cold air, take the silencer out and toss a K&N panel filter in. I tested stock airbox, BBK intake, C&L inlet and was fastest time and MPH with stock airbox.
Only thing I don't like about the adapter kits for the CD players is you have to drill 4 holes in the console and they are visible if you go back to stock. You can do it without the kit though but very hard to explain how to do it. I used a 93 Cobra R radio delete to make one for my 93 GT.
Only thing I don't like about the adapter kits for the CD players is you have to drill 4 holes in the console and they are visible if you go back to stock. You can do it without the kit though but very hard to explain how to do it. I used a 93 Cobra R radio delete to make one for my 93 GT.
Yes keep it stock..
But two easy things you should change that will make a big difference.
Get an aluminum driveshaft, it's lighter than the steel stock one and since it's rotating mass & before the rear diff you'll get better acceleration.
And more importantly change the mass air sensor with one form a 93 cobra, the stock 89-93 is very restrictive, they upgraded it in the 93 cobra and then in every Mustang in '94 but the 94 has a different housing, The 93 cobra mas is calibrated for the stock GT 19lbs injectors (even though the cobra had 24s, its computer compensated) You could get one on ebay for $69 and it takes 10 mins to change.
You'll feel the difference the second you drive it...
Guess which one's which
Here's the Cobra unit in my '91GT
__________________
But two easy things you should change that will make a big difference.
Get an aluminum driveshaft, it's lighter than the steel stock one and since it's rotating mass & before the rear diff you'll get better acceleration.
And more importantly change the mass air sensor with one form a 93 cobra, the stock 89-93 is very restrictive, they upgraded it in the 93 cobra and then in every Mustang in '94 but the 94 has a different housing, The 93 cobra mas is calibrated for the stock GT 19lbs injectors (even though the cobra had 24s, its computer compensated) You could get one on ebay for $69 and it takes 10 mins to change.
You'll feel the difference the second you drive it...
Guess which one's which
Here's the Cobra unit in my '91GT
__________________
My car is a little up there in miles, 130k on the clock to be in the ball park. Mine was mostly stock when I bought it. It had a in fender CAI, hooker shortys and a cheap cat back exhaust. Since then I have done the SN-95 Cobra mass air swap, kirben fuel regulator, 200lph fuel pump, advanced timing, pro-chamber cross over, edelbrock cat back exhaust, under-drive pullies. That stuff is all on the low budget. But man, at 20k, that would be a nice cruiser…