Piston difference

AnglicoGT98 · July 13th, 2007, 06:12 PM

Are there any difference in the pistons from 96-98 v.s 99-04?? I thought I read somewhere that the pistons in 96-98's have a higher dome. Don't know if it was B.S. or not.

Ccash00 · July 13th, 2007, 06:53 PM

Yeah there different thats why you get the compression increase

68 dlxcoupe · July 13th, 2007, 07:41 PM

They should be about the same and the only reason you get a compression increase is because the combustion chambers are different in PI and Non PI heads

Ccash00 · July 13th, 2007, 08:05 PM

No if they were the same than the 99 would have the higher compression also, the 98 and under has different pistons

DrHolliday · July 13th, 2007, 08:06 PM

The 96-98 have a smaller dish in the pistons than the 99-04's.

Boomer · July 13th, 2007, 08:59 PM

Originally Posted by DrHolliday

The 96-98 have a smaller dish in the pistons than the 99-04's.

Yup that is correct.....

MustangMatt96GT · July 13th, 2007, 09:51 PM

11cc on the NPI motors and 18cc on the PI motors if I remember correctly!

AnglicoGT98 · July 14th, 2007, 01:04 PM

So the 99+ have a bigger dish with a smaller combustion chamber. And the 98- have a smaller dish with a bigger chamber? Then how come I hear that a 98- with PI heads is more powerful than a 99+ (which already has PI heads)? I mean, wouldn't a bigger combustion chamber mean a bigger dish??

Boomer · July 14th, 2007, 02:56 PM

The pistons on the 96-98 have a smaller dish than the 99+, the heads on the 96-98 have larger combustion chambers to lower the compression ratio. When you install the 99+ heads on the small dished Npi pistons it raises the compression ratio over a full point to somewhere around 10.4:1.

July 13th, 2007, 06:12 PM	#1
AnglicoGT98 Enthusiast Join Date: Feb 2007 Location: Coral Springs, FL Posts: 630 iTrader: 2 reviews	Piston difference Are there any difference in the pistons from 96-98 v.s 99-04?? I thought I read somewhere that the pistons in 96-98's have a higher dome. Don't know if it was B.S. or not. __________________ Parting out 2003 SVT Cobra Air/Fuel http://www.moddedmustangs.com/forums...003-cobra.html Engine http://www.moddedmustangs.com/forums...003-cobra.html

July 13th, 2007, 07:41 PM	#3
68 dlxcoupe Enthusiast 2004 Mach 1 13.30 @ 104.47 Join Date: Jul 2006 Location: Richmond, Virginia Posts: 919 iTrader: 2 reviews	They should be about the same and the only reason you get a compression increase is because the combustion chambers are different in PI and Non PI heads __________________ EAGLE SCOUTS OR GTFO MyStangOpens (12:01:05 AM): honey nut for me

July 13th, 2007, 08:06 PM	#5
DrHolliday Enthusiast Join Date: Mar 2007 Location: New Port, NC Posts: 717 iTrader: 0 reviews	The 96-98 have a smaller dish in the pistons than the 99-04's. __________________ Mustangless atm 2006 2500 HD Diesel. Built allison trans and other goodies

July 13th, 2007, 09:51 PM	#7
MustangMatt96GT Proud American 1996 Mustang GT 10.76 @ 122 with d/a of 8365 ft Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,168 iTrader: 3 reviews	11cc on the NPI motors and 18cc on the PI motors if I remember correctly! __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions Blown Small Block Ford with a hole in the block. 9.5 Dart Block 400 CI being saved for. Just because you can fuck a cactus doesn't mean you should. Never Lift Racecars

July 14th, 2007, 01:04 PM	#8
AnglicoGT98 Enthusiast Join Date: Feb 2007 Location: Coral Springs, FL Posts: 630 iTrader: 2 reviews	So the 99+ have a bigger dish with a smaller combustion chamber. And the 98- have a smaller dish with a bigger chamber? Then how come I hear that a 98- with PI heads is more powerful than a 99+ (which already has PI heads)? I mean, wouldn't a bigger combustion chamber mean a bigger dish?? __________________ Parting out 2003 SVT Cobra Air/Fuel http://www.moddedmustangs.com/forums...003-cobra.html Engine http://www.moddedmustangs.com/forums...003-cobra.html

July 13th, 2007, 06:53 PM	#2
Ccash00 Newbie Join Date: Oct 2006 Posts: 41 iTrader: 0 reviews	Yeah there different thats why you get the compression increase

July 13th, 2007, 08:05 PM	#4
Ccash00 Newbie Join Date: Oct 2006 Posts: 41 iTrader: 0 reviews	No if they were the same than the 99 would have the higher compression also, the 98 and under has different pistons

July 14th, 2007, 02:56 PM	#9
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 941 iTrader: 0 reviews	The pistons on the 96-98 have a smaller dish than the 99+, the heads on the 96-98 have larger combustion chambers to lower the compression ratio. When you install the 99+ heads on the small dished Npi pistons it raises the compression ratio over a full point to somewhere around 10.4:1. __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

Remove Advertisements Sponsored Links
Forums at Modded Mustangs Advertisement Advertisement

Threads Similar to: Piston difference
Thread	Thread Starter	Forum	Replies	Last Post
347? about rod & piston combo	And then some	5.0 Mustangs	14	October 5th, 2007 11:54 AM
Whats the best piston to have?	powersrj	5.0 Mustangs	3	August 21st, 2007 10:50 PM
Piston sizes?	MySallyMI	99-04	9	May 22nd, 2007 07:10 PM
Piston Question	bigbadtalontsi	5.0 Mustangs	5	January 18th, 2007 12:20 PM
PISTON ?	89GTCONV	5.0 Mustangs	1	June 14th, 2006 10:44 PM

All times are GMT -4. The time now is 12:33 AM.
Contact Us - Modded Mustangs - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.