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Old 04-02-2007, 02:00 AM   #1
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Question 4.6.... want more ponies... help?

Okay, so I'm 24 years young and I have a 98 GT with 3.73 gears (is that right???). I am the 3rd owner. The car is mint but has HIGH MILES (167,000) but runs better than any 4.6 I've been in... I don't know the full history but I've been stomping the **** out of everyone around here. I read in a post that the 4.6 GT is a SOHC???? Mine is a DOHC.... does that mean that this isn't the stock engine? Anyways. I'm not by anymeans made of money so, what's the cheapest way to start adding horsepower? I already have a nitrous kit but I havn't installed it yet. What do I need to make this engine the same as a Cobra engine? I'm doing a Saleen clone... but I need to add some ponies first!!! Please help!? Oh, I'm a Newbie here too...
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Old 04-02-2007, 02:14 AM   #2
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Re: 4.6.... want more ponies... help?

yes, all GT's are sohc, dohc came on the cobras/mach1's. its possible that a previous owner has done a dohc 4v swap, which is why your car feels stronger than other 4.6ers. there is also a strong possibility while the car has 167k on it, it could be a newer motor from a mach1 or 99-01 cobra (being a 4v 4.6l as well) with less miles than the chassis.

if the bottom end is still the original bottom end, i wouldnt recommend using any power adders on it unless you plan on rebuilding it soon and have a savings account ready for a new bottom end. if the motor has actually entirely been replaced with a mach1 or the like, and it has low miles on the motor and is really a 4v, it will love nitrous or forced induction, though if i recall the mach1 have a little higher compression than their forced induced 4v 4.6l cobra counterparts, and have a weaker crank if im not mistaken.

you definately have quite a conundrum on your hands.
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Old 04-02-2007, 02:22 AM   #3
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Re: 4.6.... want more ponies... help?

got pictures of the motor?
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Old 04-02-2007, 02:56 AM   #4
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Re: 4.6.... want more ponies... help?

I just went outside to look. Then I looked up 98 GT engines on yahoo and it looks the same http://www.coolasscars.com/ron/image...ustang98gt.jpg

Now, I'm confussed because when they replaced the water pump they asked me if it was a SOHC or DOHC... I said I had no clue, they looked and came back and said it was DOHC and had a pump that was made for DOHC put in??? Should I be concerned???? Still wondering why the hell my car pulls so damn hard and strong!? It has 3.73 gears, wide dual MAGNAFLO exhaust... and a short shift kit... that's all that I'm aware of? It ran rough when I got it, but I threw in new plugs and ran some injector cleaner (one plug was loose) and now it runs liked a raped ape.... how much to rebuild the engine? And is it worth it? Or is it cheaper to get a cobra engine? Or, I guess what engine is the best for the best price??? ****, now I gotta start saving...
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Old 04-02-2007, 04:02 AM   #5
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Re: 4.6.... want more ponies... help?

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Originally Posted by alwaysthefinest View Post
I just went outside to look. Then I looked up 98 GT engines on yahoo and it looks the same http://www.coolasscars.com/ron/image...ustang98gt.jpg

Now, I'm confussed because when they replaced the water pump they asked me if it was a SOHC or DOHC... I said I had no clue, they looked and came back and said it was DOHC and had a pump that was made for DOHC put in??? Should I be concerned???? Still wondering why the hell my car pulls so damn hard and strong!? It has 3.73 gears, wide dual MAGNAFLO exhaust... and a short shift kit... that's all that I'm aware of? It ran rough when I got it, but I threw in new plugs and ran some injector cleaner (one plug was loose) and now it runs liked a raped ape.... how much to rebuild the engine? And is it worth it? Or is it cheaper to get a cobra engine? Or, I guess what engine is the best for the best price??? ****, now I gotta start saving...
Thats the SOHC engine. Even though it uses 2 camshafts, it only has one in each cylinderhead. If it were a DOHC motor it would have 2 camshafts in each cylinderhead for a total of 4 camshafts.

I'm no big mechanical or anything but maybe you could take it to one and have them service it and check the compression and if it still in good shape you could probably through your Nitrious kit on there and it will run fine, but I don't know that to be a fact. I'm not sure how much a new motor or a rebuild would cost, but you could get some PI heads and a supercharger and that thing would be making some pretty good power.
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Old 04-02-2007, 06:13 AM   #6
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Re: 4.6.... want more ponies... help?

Is your lower intake (in the valley of the motor between the cylinder heads) a plastic intake? or is it half aluminum?

Previous owner may have swapped over the PI heads from the 99-04 GTs (still SOHC though)
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Old 04-02-2007, 08:01 AM   #7
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Re: 4.6.... want more ponies... help?

sounds like you have a SOHC motor, maybe its a 99-04 because the stock 94-98 gts (96-98 4.6L) are rather slow anywhere near stock.

Can you get us a picture?

If you find outs its the oem engine then it would be a good idea to invest in some PI heads and rebuild the engine with some good internals so you can really get some power out of her in the future.
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Old 04-02-2007, 10:07 AM   #8
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Re: 4.6.... want more ponies... help?

Quote:
Originally Posted by alwaysthefinest View Post
I just went outside to look. Then I looked up 98 GT engines on yahoo and it looks the same http://www.coolasscars.com/ron/image...ustang98gt.jpg

Now, I'm confussed because when they replaced the water pump they asked me if it was a SOHC or DOHC... I said I had no clue, they looked and came back and said it was DOHC and had a pump that was made for DOHC put in??? Should I be concerned???? Still wondering why the hell my car pulls so damn hard and strong!? It has 3.73 gears, wide dual MAGNAFLO exhaust... and a short shift kit... that's all that I'm aware of? It ran rough when I got it, but I threw in new plugs and ran some injector cleaner (one plug was loose) and now it runs liked a raped ape.... how much to rebuild the engine? And is it worth it? Or is it cheaper to get a cobra engine? Or, I guess what engine is the best for the best price??? ****, now I gotta start saving...
that my friend would be a non-pi sohc motor
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Old 04-02-2007, 03:55 PM   #9
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Re: 4.6.... want more ponies... help?

The intake is plastic. I don't have any clue what's been done but when I race my friends in there stock GT's I smoke them so bad, low and top end! Like I said, here is a link to what the motor looks like... Not from my car but one on YAHOO... http://fastcoolcars.com/images/Rons%...tang98gt14.jpg It has lot of new thick red FORD RACING plug wires, and some newer chrom looking things with plugs going into them (kinda above the plugs on drivers side of engine)I wish I knew more about the car... So, PI HEADS???? Where do I get those for a good price?
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Old 04-02-2007, 11:47 PM   #10
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Re: 4.6.... want more ponies... help?

Quote:
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The intake is plastic. I don't have any clue what's been done but when I race my friends in there stock GT's I smoke them so bad, low and top end! Like I said, here is a link to what the motor looks like... Not from my car but one on YAHOO... http://fastcoolcars.com/images/Rons%...tang98gt14.jpg It has lot of new thick red FORD RACING plug wires, and some newer chrom looking things with plugs going into them (kinda above the plugs on drivers side of engine)I wish I knew more about the car... So, PI HEADS???? Where do I get those for a good price?
you can get PI heads and the intake from a junkyard try too find a 02-04 with the aluminum runner on the intake.
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Old 04-03-2007, 01:37 AM   #11
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Re: 4.6.... want more ponies... help?

So any 02-04 mustang? Or gt? ???
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Old 04-03-2007, 02:17 AM   #12
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Re: 4.6.... want more ponies... help?

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So any 02-04 mustang? Or gt? ???
The 99-04 Mustang GT's came with the PI heads, he's just saying that the 02-04 Mustang GT's intake manifold are made with aluminum where the thermistat housing is because the plastic one can crack from the hot coolent. (I know that from experience)

Here the PI intake manifold will the front aluminum piece.
gefracing.com: PI INTAKE MANIFOLD

PI heads.
gefracing.com: POWER IMPROVEMENT HEAD
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Old 04-03-2007, 02:26 AM   #13
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Re: 4.6.... want more ponies... help?

Ah.... So I get the PI intake manifold and that will give me more horsepower? Yeah, I need to take a mechanics class
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Old 04-03-2007, 02:30 AM   #14
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Re: 4.6.... want more ponies... help?

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Ah.... So I get the PI intake manifold and that will give me more horsepower? Yeah, I need to take a mechanics class
I would defenately fined a good mechanic in your area to talk to before you start throwing a bunch of money at your car.
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Old 04-03-2007, 09:14 PM   #15
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Re: 4.6.... want more ponies... help?

LOL.... yeah, I know.
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Old 04-03-2007, 09:16 PM   #16
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Re: 4.6.... want more ponies... help?

What kind of turbo or supercharger could I go with? And where would I get the best deal online?
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