Lots of PI swap questions

2000Mustang · October 20th, 2008, 09:03 PM

So, im getting serious about my PI swap, and I have some questions: I plan on using Ford Racing heads, would the gains be worth it to pay $799.95 for a Trick Flow Track Heat intake manifold as opposed to $219.95 for a stock replacement intake? Also, what would be better, 70mm or 75mm throttle body on a PI swap, bolt-on '98 GT? And when i buy the throttle body do i need to buy the plenum to assist? Would it be worth it to P&P the stock heads if I can scrape the money? I do not plan on adding cams (at least not right now), is it even worth it?

burlingtonNC98GT · October 20th, 2008, 10:43 PM

keep the stock npi heads and port and polish them and throw some nice cams in them. and yes it is definitely worth it. go with the 70mm throttle body unless u plan on boosting the engine any time soon, in which case i would recommend the 75. go ahead and by the plenum. accufab is the best brand for both tb and plenum. as for the intake, im not too familiar with the trick flow model u are referring to so i cant really hellp u out there but i cant imagine it being that much of an improvement over a standard pi intake.

'97'Cobra · October 21st, 2008, 11:16 AM

he said it best man P&P and throw in a new cam. I would go ahead and by the trickflow since your going to get a intake anyways.

BlueStangGT · October 21st, 2008, 06:43 PM

My experience with the PI headswap was awesome. It's so much cheaper to do it now than it was in 2001 when mine was done that I can't think of a good reason why not to use PI heads. If you've got time on your side and are patient I'm sure you can find a set of PI heads at a bargain. Otherwise I think the comments here are sound. I would also recommend getting subframe connectors before you get much farther with the power, you'll be amazed at how much better your car behaves.

johnr2001 · October 21st, 2008, 07:34 PM

just do it right and get the heads and cams. I picked up a set of 04 heads and cams for my sons 98 with 21000 miles on them for 200.00. there are plenty of deals out there just shop around

burlingtonNC98GT · October 21st, 2008, 08:45 PM

Originally Posted by johnr2001

just do it right and get the heads and cams. I picked up a set of 04 heads and cams for my sons 98 with 21000 miles on them for 200.00. there are plenty of deals out there just shop around

there is nothing wrong with keepeing th npi heads. u dont gain enough hp from pi heads to justify the cost. plus u have the dificulty of having to deal with extra compression which isnt too good if u ever plan on boosting that engine. just save the cost of the new heads and use it to port and polish the npi heads and buy some really nice cams for them and ur set

2000Mustang · October 21st, 2008, 09:31 PM

Ok, honestly im liking P&P the stock heads and nice cam. More realistic build for my situation. Now can someone direct me to 'really nice cams'?

October 20th, 2008, 09:03 PM	#1
2000Mustang Enthusiast 1998 Mustang GT Join Date: Dec 2006 Location: Kansas City, MO Posts: 561 iTrader: 0 reviews	Lots of PI swap questions So, im getting serious about my PI swap, and I have some questions: I plan on using Ford Racing heads, would the gains be worth it to pay $799.95 for a Trick Flow Track Heat intake manifold as opposed to $219.95 for a stock replacement intake? Also, what would be better, 70mm or 75mm throttle body on a PI swap, bolt-on '98 GT? And when i buy the throttle body do i need to buy the plenum to assist? Would it be worth it to P&P the stock heads if I can scrape the money? I do not plan on adding cams (at least not right now), is it even worth it? __________________ Off-road X pipe, Magnaflow mufflers, BBK cai, 3.73 gears, ZEX 75 shot (not hooked up), 17in. Bullitts, lowered

October 20th, 2008, 10:43 PM	#2
burlingtonNC98GT Regular 1998 Mustang GT Join Date: Jan 2007 Location: Burlington, NC Posts: 217 iTrader: 0 reviews	keep the stock npi heads and port and polish them and throw some nice cams in them. and yes it is definitely worth it. go with the 70mm throttle body unless u plan on boosting the engine any time soon, in which case i would recommend the 75. go ahead and by the plenum. accufab is the best brand for both tb and plenum. as for the intake, im not too familiar with the trick flow model u are referring to so i cant really hellp u out there but i cant imagine it being that much of an improvement over a standard pi intake. __________________ 1998 GT PI intake PI cams bbk cai flowmaster 40's catback bbk x-pipe w/ cats march pulleys RAM clutch Steeda Tri-axe

October 21st, 2008, 06:43 PM	#4
BlueStangGT Newbie Join Date: Feb 2007 Posts: 21 iTrader: 0 reviews	My experience with the PI headswap was awesome. It's so much cheaper to do it now than it was in 2001 when mine was done that I can't think of a good reason why not to use PI heads. If you've got time on your side and are patient I'm sure you can find a set of PI heads at a bargain. Otherwise I think the comments here are sound. I would also recommend getting subframe connectors before you get much farther with the power, you'll be amazed at how much better your car behaves. __________________ 1998 Bright Atlantic Blue GT Coupe - 5 Spd., Big Bore Headswap, 4.30's, blah, blah, blah...

October 21st, 2008, 07:34 PM	#5
johnr2001 Enthusiast 2001 GT Join Date: Dec 2007 Location: Bivalve MD Posts: 575 iTrader: 1 reviews	just do it right and get the heads and cams. I picked up a set of 04 heads and cams for my sons 98 with 21000 miles on them for 200.00. there are plenty of deals out there just shop around __________________ 03 Mach 1 full eaton swap, 18" chrome bullitts, H&R springs, 5.0 shifter, slp2, mac catted H, FRP 4.10's, 443 RWHP/ 386 TQ

October 21st, 2008, 09:31 PM	#7
2000Mustang Enthusiast 1998 Mustang GT Join Date: Dec 2006 Location: Kansas City, MO Posts: 561 iTrader: 0 reviews	Ok, honestly im liking P&P the stock heads and nice cam. More realistic build for my situation. Now can someone direct me to 'really nice cams'? __________________ Off-road X pipe, Magnaflow mufflers, BBK cai, 3.73 gears, ZEX 75 shot (not hooked up), 17in. Bullitts, lowered

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