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Old 02-23-2015, 01:26 PM   #1
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1998 mustang Gt!

Hi guys, I'm new to this forum but the help looks really good! I recently bought a 1998 Mustang GT with 113k miles on it! It seems to be stock with a K&R cai, but i just got tax money back and looking to upgrade! What should I go for the most increase on the best budget? I'm learning how to work on it with my older brother (i'm in a family of mechanics). So what kind of things should i get in which order?

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Old 02-23-2015, 03:02 PM   #2
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By far, the best bang for your buck will be to do a PI (Power Improved) swap which involves swapping the heads, cams, and intake manifold for the power improved parts from a 99-up 2V engine. This will give you a very nice gain in power, and you will have a solid foundation for future modifications.
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Old 02-23-2015, 03:34 PM   #3
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How much is all of that running roughly?


When I die, I hope Heaven is full of 4.6's!
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Old 02-23-2015, 04:05 PM   #4
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Lol.
Well I don't know about heaven but the wrecking yards are full of 4.6's!

If you you hunt around a bit, you should be able to do the swap for under a thousand dollars. The heads and cams from any PI engine will work... cars, trucks, or vans. I found a set of low mileage, ported PI heads on CL for $300 recently, so hunt around and see what you can find.
You should just buy a new Ford Racing intake manifold, because the plastic manifolds are prone to cracking and you may as well start with a fresh one. I believe they are around $200.
Gaskets, head bolts, timing chains, guides, and tensioners will probably be another $3-400 depending on the quality of the components.
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Old 02-23-2015, 04:13 PM   #5
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PI swap you will actually make a little more power than a 99-04 because you'll have a higher compression.


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Old 02-23-2015, 05:25 PM   #6
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PI swap, tuner, suspension, gears, exhaust. At least That's the Order I should have done myself. I'm kicking around the idea of a swap on my 96. Been gathering some parts here and there to do it this spring. From all my research this will be the most performance and cost effective mod. You will feel a difference if you go with 4.10 gears, I did this already and it made the car feel a lot better even without the swap.

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Old 02-23-2015, 05:26 PM   #7
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If you have some extra funds to play with check out Modular Head Shops website. Can get PI heads rebuilt with different cams etc. It's a good deal if your looking to do cams and Also have the heads gone through.

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Old 02-23-2015, 05:36 PM   #8
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Quote:
Originally Posted by Steve96 View Post
If you have some extra funds to play with check out Modular Head Shops website. Can get PI heads rebuilt with different cams etc. It's a good deal if your looking to do cams and Also have the heads gone through.

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Completely not worth the money for a bolt on car. Like... REALLY not worth it. Cams maybe while its out and valve springs too but the porting is overkill.

What I would do (and what was done to my 98)

-PI swap
-Shorty shifter
-gears
-full exhaust
-LCAs
-Lowered
-CAI
-Plenum
-Tune up
-Bigger brakes
-Wheels and tires

Also might want to look at cosmetics and such if the car is in rough shape. I redid damn near the entire interior of my 98 including re-upholstering the seats and new carpet and it was super nice. I'd post pics, but photobucket is being a combo-whore and not sure wth is wrong with it.
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Old 02-23-2015, 10:40 PM   #9
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When I added up used heads (200-300), having them gone through at a machine Shop (200-250), stage 2 cushman or comp cams (500-600), new valve springs (250-300), it wasn't that far off from the 1800 or so from MHS with the equivalent cams, springs, etc.

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Old 02-23-2015, 11:38 PM   #10
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Thank you guys so much for all the tips! Definetly going to be referring to this when i go part shopping!


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Old 02-23-2015, 11:47 PM   #11
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There are tons of different things you can do. It's endless. All about how much money you want to spend. I have some bolt ons, gears, lowered, wheels, and I'm pretty much happy with mine. Naturally we always want more power!

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Old 02-24-2015, 12:18 AM   #12
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It depends on what kind of build you are looking for. If you are trying to get max HP, just skip the dumb head swap and go straight for Turbo or supercharger. If you want to stay NA and Budget, the PI head swap is great. If you want N/A and fast, get your checkbook out and buy the most expensive **** you can find because its not going to be cheap with a 4.6.


If you really want to get serious, sell it and get a 1998+ Z28.
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Old 02-24-2015, 12:53 AM   #13
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When you get that z28 you need to Also cut all your shirts in half and start growing a mullet. Lol.

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Old 02-24-2015, 06:18 AM   #14
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Quote:
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When I added up used heads (200-300), having them gone through at a machine Shop (200-250), stage 2 cushman or comp cams (500-600), new valve springs (250-300), it wasn't that far off from the 1800 or so from MHS with the equivalent cams, springs, etc.

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Except the Stage 3 MHS head/cam combo is $2700... And you might as well get the Stage 3 if you are going to spend $2100 for the Stage 1s its not much more to just go all out. Or you really can just pick up a set from the JY, clean them up and go. The Ford heat treatment and some of the other tricks they used on the PI heads allow them to run practically forever with little/no work. Nick has even stated this multiple times on other forums I belong to.

However, his StockMods are $900 and are the way to go (IMO) if you are doing a bolt on car and buying the heads "new". The PI cams you can usually source for next to nothing or wait to find a used set of Comp 262s or something for $300. Like I said, ported heads are way overkill and there is a LOT you can do for the extra $1800 vs little/no gain on a stock bottom end and big port heads... like buy a supercharger.

Quote:
Originally Posted by Panther140 View Post
It depends on what kind of build you are looking for. If you are trying to get max HP, just skip the dumb head swap and go straight for Turbo or supercharger. If you want to stay NA and Budget, the PI head swap is great. If you want N/A and fast, get your checkbook out and buy the most expensive **** you can find because its not going to be cheap with a 4.6.


If you really want to get serious, sell it and get a 1998+ Z28.
Well... the NPI heads actually aren't terrible, its been proven that the majority of the PI power is "locked up" in the crap NPI cams/intake. However, it is far from a "dumb head swap" and is so cheap buying from CL/JY that its kind of "dumb" to not do it. Agree on the LS1 though, ridiculously better bang for the buck car if all you are interested in is performance and don't care about looking like a catfish with a fat *** and a horrible interior.

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When you get that z28 you need to Also cut all your shirts in half and start growing a mullet. Lol.

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Also have to cut all the sleeves off your t-shirts, become a chain smoker and drink really bad beer.
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