Can't decide, engine swap or PI swap? A few questions...

k3vin · August 31st, 2007, 12:34 AM

What would be more worthwhile, doing a full PI swap on my 122k mile engine or doing an entire engine swap with a 99+ GT that has 50k or less miles?

Im thinking about my car in the long run so obviously the engine swap would be better but how much would it cost?

And about how much would the labor cost be for an entire engine swap?

ujslost · August 31st, 2007, 12:42 AM

engine swap, better IMO and do it yourself, buy you a junker to drive while the stang is getting operated on and we can guide you, and buy yourself a manual for your car.

G.T. Rags · August 31st, 2007, 12:51 AM

Originally Posted by ujslost

engine swap, better IMO and do it yourself, buy you a junker to drive while the stang is getting operated on and we can guide you, and buy yourself a manual for your car.

i agree....if ya got the cash and the ability go with a 99+ motor...

i recently made the decision to go PI this afternoon, and am in search of a set of heads.

jersey98gt · August 31st, 2007, 01:01 AM

forget the 99+ swap go out and find yourself a 4V (96-98).. 2Vs are worthless cant do anything with these god dam motors in N/A form

SWEET2KSTANG · August 31st, 2007, 01:37 AM

more power and compression just doing the p.i. swap. either way, you arent going to lose any performance.

k3vin · August 31st, 2007, 01:40 AM

Would it be worth it though with 122k miles on the engine?

SWEET2KSTANG · August 31st, 2007, 01:47 AM

only if the engine has been properly maintained. you can run a compression test on it to get a general idea on what kind of wear is on the motor.

96gtponyred · August 31st, 2007, 03:02 AM

how can you do a compression test i have 144 k on mine and i'd like to test it. also in the future id like to swap it out for either a rebuilt 96 gt motor, a 99 gt motor, or maybe a 96 cobra motor depending on how much i save i was lookin at them at autozone today

SWEET2KSTANG · August 31st, 2007, 03:34 AM

just have a compression tester. these motors should hold around 155psi.

AnglicoGT98 · August 31st, 2007, 06:21 AM

Wouldn't doing a full PI swap "technically" knock the miles down a little bit?? I mean, putting new heads, valve train components, and changing some other things like timing chains, o-rings, you know...little shit, while you're in there would help the engine alot wouldn't it? I'm not saying I'm totally against the engine swap. It is a great idea, but entertain a more simple approach first...lol

jersey98gt · August 31st, 2007, 08:30 AM

get the 4V

ujslost · August 31st, 2007, 09:18 AM

Originally Posted by AnglicoGT98

Wouldn't doing a full PI swap "technically" knock the miles down a little bit?? I mean, putting new heads, valve train components, and changing some other things like timing chains, o-rings, you know...little shit, while you're in there would help the engine alot wouldn't it? I'm not saying I'm totally against the engine swap. It is a great idea, but entertain a more simple approach first...lol

Not really. Because you are only rebuilding the valvetrain pretty much. Or the "top end" of the motor. The rings and pistons and cylinder wall all still have the xxx,xxx miles on them. I have seen ppl rebuild the top end of a high milage motor and therefore blow the bottom end. Putting new parts on old parts tends to put older parts under more stress. I think this usually is the case in engines with over 250k miles though.

caintcatchmyGT · August 31st, 2007, 11:52 AM

do the PI swap but, look into rebuilding the short block, get forged internals and bore it out. If you do that, ya um you pretty much have a brand new motor. but its all up to you and what you want. do like they said and get a beater and do it right!

G.T. Rags · August 31st, 2007, 02:30 PM

Originally Posted by ujslost

Originally Posted by AnglicoGT98

Wouldn't doing a full PI swap "technically" knock the miles down a little bit?? I mean, putting new heads, valve train components, and changing some other things like timing chains, o-rings, you know...little shit, while you're in there would help the engine alot wouldn't it? I'm not saying I'm totally against the engine swap. It is a great idea, but entertain a more simple approach first...lol

Not really. Because you are only rebuilding the valvetrain pretty much. Or the "top end" of the motor. The rings and pistons and cylinder wall all still have the xxx,xxx miles on them. I have seen ppl rebuild the top end of a high milage motor and therefore blow the bottom end. Putting new parts on old parts tends to put older parts under more stress. I think this usually is the case in engines with over 250k miles though.

+1

k3vin · August 31st, 2007, 02:46 PM

hmmm. Im still split on what I should do. Ill do the compression test and see if that changes my mind. Nothings gonna happen for at least 10 months though so I guess that leaves me more time to think lol.

And the Cobra swap sounds tempting as well but I think thats gonna be more money then Im willing to spend.

MustangMatt96GT · August 31st, 2007, 02:57 PM

Do a compression test! And tell us where your at

G.T. Rags · August 31st, 2007, 03:00 PM

Originally Posted by k3vin

hmmm. Im still split on what I should do. Ill do the compression test and see if that changes my mind. Nothings gonna happen for at least 10 months though so I guess that leaves me more time to think lol.

And the Cobra swap sounds tempting as well but I think thats gonna be more money then Im willing to spend.

For a 4v swap ur looking at spending well over 5 grand when ur all said and done, where as u can find a cheap PI swap for under 1500 if u take ur time and look.

SWEET2KSTANG · August 31st, 2007, 09:14 PM

npi to pi swaps are great for you guys! people are showing dyno results of 99rwhp with vt heads, cams, and header back alone! it is well worth the money and by far the best bang for the buck. if you are on a budget, do the swap. if you have the money to blow, just get a cammer

G.T. Rags · August 31st, 2007, 11:10 PM

Originally Posted by SWEET2KSTANG

npi to pi swaps are great for you guys! people are showing dyno results of 99rwhp with vt heads, cams, and header back alone! it is well worth the money and by far the best bang for the buck. if you are on a budget, do the swap. if you have the money to blow, just get a cammer

i must sound like and idiot but what is a cammer?

HMUSN · August 31st, 2007, 11:11 PM

Originally Posted by 96GTRagTop

i must sound like and idiot but what is a cammer?

:wink

August 31st, 2007, 12:34 AM	#1
k3vin Newbie Join Date: Aug 2007 Posts: 28	Can't decide, engine swap or PI swap? A few questions... What would be more worthwhile, doing a full PI swap on my 122k mile engine or doing an entire engine swap with a 99+ GT that has 50k or less miles? Im thinking about my car in the long run so obviously the engine swap would be better but how much would it cost? And about how much would the labor cost be for an entire engine swap?

August 31st, 2007, 01:01 AM	#4
jersey98gt Enthusiast Join Date: Jan 2007 Posts: 661	forget the 99+ swap go out and find yourself a 4V (96-98).. 2Vs are worthless cant do anything with these god dam motors in N/A form __________________ -BBK CAI, BASSANI CB + X, SCT 93 tune, 4.10s, Cobra brakes, Cobra R wrapped in nitto 555 tire. -College Football and studies take up the bulk of my time.

August 31st, 2007, 01:37 AM	#5
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,982	more power and compression just doing the p.i. swap. either way, you arent going to lose any performance. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

August 31st, 2007, 01:47 AM	#7
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,982	only if the engine has been properly maintained. you can run a compression test on it to get a general idea on what kind of wear is on the motor. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

August 31st, 2007, 03:02 AM	#8
96gtponyred Regular 94 cobra Join Date: Jul 2007 Location: MA Posts: 490	how can you do a compression test i have 144 k on mine and i'd like to test it. also in the future id like to swap it out for either a rebuilt 96 gt motor, a 99 gt motor, or maybe a 96 cobra motor depending on how much i save i was lookin at them at autozone today __________________ cobra R hood (has a vin#) bassani catback flows welded in jegs O/R H-pipe Jlt CAI Mgw shifter 03 cobra rims 3.73's (on the way!!!)

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August 31st, 2007, 12:42 AM	#2
ujslost MM Fanatic Join Date: Mar 2007 Location: Albertville, AL Posts: 3,865	engine swap, better IMO and do it yourself, buy you a junker to drive while the stang is getting operated on and we can guide you, and buy yourself a manual for your car.

August 31st, 2007, 01:40 AM	#6
k3vin Newbie Join Date: Aug 2007 Posts: 28	Would it be worth it though with 122k miles on the engine?

August 31st, 2007, 03:34 AM	#9
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,982	just have a compression tester. these motors should hold around 155psi. __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

August 31st, 2007, 06:21 AM	#10
AnglicoGT98 Enthusiast Join Date: Feb 2007 Location: Coral Springs, FL Posts: 630	Wouldn't doing a full PI swap "technically" knock the miles down a little bit?? I mean, putting new heads, valve train components, and changing some other things like timing chains, o-rings, you know...little shit, while you're in there would help the engine alot wouldn't it? I'm not saying I'm totally against the engine swap. It is a great idea, but entertain a more simple approach first...lol __________________ Parting out 2003 SVT Cobra Air/Fuel http://www.moddedmustangs.com/forums...003-cobra.html Engine http://www.moddedmustangs.com/forums...003-cobra.html

August 31st, 2007, 08:30 AM	#11
jersey98gt Enthusiast Join Date: Jan 2007 Posts: 661	get the 4V __________________ -BBK CAI, BASSANI CB + X, SCT 93 tune, 4.10s, Cobra brakes, Cobra R wrapped in nitto 555 tire. -College Football and studies take up the bulk of my time.

August 31st, 2007, 11:52 AM	#13
caintcatchmyGT Regular Join Date: Jul 2007 Location: still here in Ft. Sill, Oklahoma Posts: 349	do the PI swap but, look into rebuilding the short block, get forged internals and bore it out. If you do that, ya um you pretty much have a brand new motor. but its all up to you and what you want. do like they said and get a beater and do it right! __________________ 1996 Mustang GT -MAC CAI -Polished 75mm TB and upper plentum -PI Intake Manifold -BBK underdrive pulleys -MAC Long Tube headers -Shorty H-pipe -Flowmaster Exhaust -18x9 275x35xR18 all around

August 31st, 2007, 02:46 PM	#15
k3vin Newbie Join Date: Aug 2007 Posts: 28	hmmm. Im still split on what I should do. Ill do the compression test and see if that changes my mind. Nothings gonna happen for at least 10 months though so I guess that leaves me more time to think lol. And the Cobra swap sounds tempting as well but I think thats gonna be more money then Im willing to spend.

August 31st, 2007, 02:57 PM	#16
MustangMatt96GT All Throttle with a Bottle 1996 Mustang GT 10.76 @ 122 with d/a of 8365 ft Join Date: Dec 2006 Location: Lakewood, CO Posts: 8,131	Do a compression test! And tell us where your at __________________ 1996 Mustang GT with a 351 swap with Stalled C4 1997 F250 Powerstroke 1999 28' Classic Dominator Special Thanks to: Andrews Racing Transmissions & Thanks for the help: PoorManMotorSports "Just Cause its Smoking, don't mean its broken"

August 31st, 2007, 09:14 PM	#18
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 8,982	npi to pi swaps are great for you guys! people are showing dyno results of 99rwhp with vt heads, cams, and header back alone! it is well worth the money and by far the best bang for the buck. if you are on a budget, do the swap. if you have the money to blow, just get a cammer __________________ right now, she is a jackstand warrior if the car was a horse, i would shoot it!!! project warhorse under construction

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