275.6 HP PI Swap

tlgrant · December 1st, 2006, 10:45 PM

i was at a tuning shop today and was talking with the owner. very smart guy, he told me that the 96-98 stang will do 195-210 stock but the last full PI swap he did with TB plenum and long tubes put 275.6 HP to the tires! he also said the opposite of everything i have learned. he claims almost all the gains come from the PI heads themselves and not the intake and cams? so now im debating on doing the Pi heads but i realy didnt want to spend the money. any ideas?

HMUSN · December 1st, 2006, 10:52 PM

he might mean 275 to the crank. that sounds right but rwhp with LT's and a tb and plenum? umm no. i had full exhaust cai tb and plenum back way when and i only put down 248/290

ChrisJ · December 2nd, 2006, 01:21 AM

Yeah I am thinking that would be crank hp...

tlgrant · December 2nd, 2006, 10:08 AM

nope it was a 96 GT, he put 03 heads cams intake with a bbk tb and plenum, long tubes back and pulleys and he got that at the tires he said he was absolutely shocked. i saw the dyno print out. the guys realy knows his stuff hes got a few stangs that he owns and does about 2 a week but that was the only PI swap he did. any way my question is he claims if i dont do the heads its not worth it. he says almost all the gains come from the heads and that not to even bother if i dont do them???? everone else says the opposite but this guys knows cars like the back of his hand he dynos stangs all day ya know?

ChrisJ · December 2nd, 2006, 10:14 AM

If you had your NPI heads worked and some cams you would flow just as good as the PI swap...Actually better then the stock PI heads...

I would just have your heads you have on it now ported and polished and get some nice cams and call it a day...Of coarse the headers would be a big help too...

Boomer · December 2nd, 2006, 08:41 PM

Only to avoid advertisment , I will say I work for a company that works with cylinder head development for a particular racing series,, The P.I heads have a horrible short side radius making the nearly worthless N/A other than the compression bump, the combution camber design is also the same. I could see if we were talking on a F.I motor but not N/A. Raisng the compression with the NPI head to 10.4:1 will net higher results than the P.I at 10.4:1, just keep in mind flow numbers are not as important when your running a N/A motor it becomes more about efficiency.

nHuman · December 7th, 2006, 07:07 AM

So if you got the NPI heads ported you could get the same HP increase that adding PI heads will do? (40-60)

ChrisJ · December 7th, 2006, 08:32 AM

Yes...If you had the NPI ported and polished and a new set of cams you would actually make more power then the PI Swap...

Boomer · December 7th, 2006, 06:37 PM

I would only have the P.I. heads worked if you plan to stay N/A, the same amount of work in a P.I head will net more if you plan to go forced induction down the road.

BigTimInNokeCity · December 13th, 2006, 11:07 PM

i have P.I. heads and i can tell you that its not gonna put you around that figure. sad but true

Boomer · December 14th, 2006, 12:18 AM

Originally Posted by BigTimInNokeCity

i have P.I. heads and i can tell you that its not gonna put you around that figure. sad but true

Please explain???? sad but true how????? or because its what you've heard or read please elaborate....

BigTimInNokeCity · December 14th, 2006, 12:56 AM

well its because of what i read and my experience with people putting them on cars. quick question what is with you being an asshole ?

Boomer · December 14th, 2006, 01:02 AM

Originally Posted by BigTimInNokeCity

well its because of what i read and my experience with people putting them on cars. quick question what is with you being an asshole ?

To basically jump and say wrong with no evidence is why, it shows you believe what you read/hear which is wrong. If I tell you a 50" wing will make you go faster will you buy one.
The points I have made in this thread are proven and if you care to elaborate your knowledge lets take it to pm's and not muck up threads by incoherent web babble.

BigTimInNokeCity · December 14th, 2006, 01:05 AM

pm's it is

Boomer · December 14th, 2006, 01:18 AM

sent and resolved?

BigTimInNokeCity · December 14th, 2006, 02:16 AM

sounds good

bigmike83 · December 15th, 2006, 07:16 PM

it could happen mine was dynoed before the throttle body and upper intake, they told me that they and pullies was worth 10 rwhp so it could be but its got some things done thats for sure

December 1st, 2006, 10:45 PM	#1
tlgrant Regular Join Date: Aug 2006 Posts: 317 iTrader: 0 reviews	275.6 HP PI Swap i was at a tuning shop today and was talking with the owner. very smart guy, he told me that the 96-98 stang will do 195-210 stock but the last full PI swap he did with TB plenum and long tubes put 275.6 HP to the tires! he also said the opposite of everything i have learned. he claims almost all the gains come from the PI heads themselves and not the intake and cams? so now im debating on doing the Pi heads but i realy didnt want to spend the money. any ideas? __________________ 96 GT , cams,intake manifold,CAI,Exhaust,Full Hotchkis suspension, and many more

December 1st, 2006, 10:52 PM	#2
HMUSN Doc 1986 SVO 48.47@ 12.58 Join Date: Nov 2006 Posts: 37,050 iTrader: 11 reviews	he might mean 275 to the crank. that sounds right but rwhp with LT's and a tb and plenum? umm no. i had full exhaust cai tb and plenum back way when and i only put down 248/290 __________________

December 2nd, 2006, 01:21 AM	#3
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	Yeah I am thinking that would be crank hp... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

December 2nd, 2006, 10:08 AM	#4
tlgrant Regular Join Date: Aug 2006 Posts: 317 iTrader: 0 reviews	nope it was a 96 GT, he put 03 heads cams intake with a bbk tb and plenum, long tubes back and pulleys and he got that at the tires he said he was absolutely shocked. i saw the dyno print out. the guys realy knows his stuff hes got a few stangs that he owns and does about 2 a week but that was the only PI swap he did. any way my question is he claims if i dont do the heads its not worth it. he says almost all the gains come from the heads and that not to even bother if i dont do them???? everone else says the opposite but this guys knows cars like the back of his hand he dynos stangs all day ya know? __________________ 96 GT , cams,intake manifold,CAI,Exhaust,Full Hotchkis suspension, and many more

December 2nd, 2006, 10:14 AM	#5
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	If you had your NPI heads worked and some cams you would flow just as good as the PI swap...Actually better then the stock PI heads... I would just have your heads you have on it now ported and polished and get some nice cams and call it a day...Of coarse the headers would be a big help too... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

December 2nd, 2006, 08:41 PM	#6
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 941 iTrader: 0 reviews	Only to avoid advertisment , I will say I work for a company that works with cylinder head development for a particular racing series,, The P.I heads have a horrible short side radius making the nearly worthless N/A other than the compression bump, the combution camber design is also the same. I could see if we were talking on a F.I motor but not N/A. Raisng the compression with the NPI head to 10.4:1 will net higher results than the P.I at 10.4:1, just keep in mind flow numbers are not as important when your running a N/A motor it becomes more about efficiency. __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

December 7th, 2006, 07:07 AM	#7
nHuman Regular 2003 Cobra Join Date: Dec 2006 Location: High Point, NC Posts: 306 iTrader: 0 reviews	So if you got the NPI heads ported you could get the same HP increase that adding PI heads will do? (40-60)

December 7th, 2006, 08:32 AM	#8
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	Yes...If you had the NPI ported and polished and a new set of cams you would actually make more power then the PI Swap... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

December 7th, 2006, 06:37 PM	#9
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 941 iTrader: 0 reviews	I would only have the P.I. heads worked if you plan to stay N/A, the same amount of work in a P.I head will net more if you plan to go forced induction down the road. __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

December 13th, 2006, 11:07 PM	#10
BigTimInNokeCity Newbie Join Date: Dec 2006 Posts: 33 iTrader: 0 reviews	i have P.I. heads and i can tell you that its not gonna put you around that figure. sad but true

December 14th, 2006, 12:56 AM	#12
BigTimInNokeCity Newbie Join Date: Dec 2006 Posts: 33 iTrader: 0 reviews	well its because of what i read and my experience with people putting them on cars. quick question what is with you being an asshole ?

December 14th, 2006, 01:05 AM	#14
BigTimInNokeCity Newbie Join Date: Dec 2006 Posts: 33 iTrader: 0 reviews	pm's it is

December 14th, 2006, 01:18 AM	#15
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 941 iTrader: 0 reviews	sent and resolved? __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

December 14th, 2006, 02:16 AM	#16
BigTimInNokeCity Newbie Join Date: Dec 2006 Posts: 33 iTrader: 0 reviews	sounds good

December 15th, 2006, 07:16 PM	#17
bigmike83 Regular 1997 mustang gt 8.06 at 87mph 1/8th mile on a 50 shot Join Date: Nov 2006 Location: clarksville TN Posts: 284 iTrader: 0 reviews	it could happen mine was dynoed before the throttle body and upper intake, they told me that they and pullies was worth 10 rwhp so it could be but its got some things done thats for sure __________________ 97 gt with 2004 pi motor,acufab intake and 75 mm bbk cold air kit,bbk long tube headers, off road h pipe,2 chamber flow, 3:73, diablo chip with dyno tune 269rwhp 301rwtq 5.4 SOHC FOR SALE pm me for details

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