3.8 vs 3.9

5litercobra · May 6th, 2006, 06:03 PM

a freind has a 3.9 and is looking for more power is there any forced induction systems for these 3.9s or is he SOL or can he use a set up for a 3.8 stang any info is appreciated thanks

Cricket · May 6th, 2006, 08:40 PM

He can use the mods for the 99-04 engines. Really there is no difference, in anything but .1L in the block. Heads and everything are the same. For forced inducation such as a supercharger have him check out procharger, vortech, paxton, or take the m90 off of the thunderbirds, but stay away from powerdyne. For turbos he is kinda SOL unless he wants to fabricate his own setup.

5litercobra · May 7th, 2006, 01:14 AM

thanks man thats a great help

turp · May 7th, 2006, 11:23 AM

Originally Posted by Cricket

Really there is no difference, in anything but .1L in the block.

I thought the difference in disp. was in the heads and it used the standard 99-04 V6 block...

Cricket · May 7th, 2006, 01:20 PM

You may right. I thought it was in the block. Let me check it out.

MSTNGRCR13 · May 7th, 2006, 04:31 PM

I myself own a 3.9 and have done a little research on the engine. The only difference between the 3.8 and the 3.9 is the length of the stroke. The 3.9's stroke is approximately .021 longer than the 3.8 which leads me to believe that the difference is in the connecting rods or different size pistons, more than likely, the connecting rods. Now, the heads may also be different to accomodate the longer stroke, however, I haven't delved that far down into it. As far as forced induction, I do know that the ProCharger Intercooled supercharger kit that I have seen on RPMOutlet.com will work and is about the best deal for your money with significantly more bang for the buck, however, due to the nature of the 3.9, you will need to take it to a speedshop and put it on the dyno to get a perfect tune or you may be able to use a Hypertech programmer, maybe even an SCT XCalibrator. Again, I am not sure on that. I hope that this helps out.

AtlanticBlue99 · May 7th, 2006, 07:53 PM

and the 3.9 is the ford windstar engine

99mustang232 · May 8th, 2006, 10:28 AM

Originally Posted by Cricket

For turbos he is kinda SOL unless he wants to fabricate his own setup.

http://www.tmaturbo.com/product.html

Cricket · May 8th, 2006, 03:00 PM

I forgot all about that website. Site says they are gonna be comming out with a twin turbo setup this summer too. I can hardly wait.

May 6th, 2006, 06:03 PM	#1
5litercobra Regular Join Date: Apr 2006 Posts: 51 iTrader: 0 reviews	3.8 vs 3.9 a freind has a 3.9 and is looking for more power is there any forced induction systems for these 3.9s or is he SOL or can he use a set up for a 3.8 stang any info is appreciated thanks

May 7th, 2006, 07:53 PM	#7
AtlanticBlue99 I Post Entirely Way Too Much 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: University of Georgia Posts: 8,854 Blog Entries: 1 iTrader: 0 reviews	and the 3.9 is the ford windstar engine __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

May 7th, 2006, 01:14 AM	#3
5litercobra Regular Join Date: Apr 2006 Posts: 51 iTrader: 0 reviews	thanks man thats a great help

May 7th, 2006, 04:31 PM	#6
MSTNGRCR13 Regular 1986 Mustang LX Join Date: Mar 2006 Location: Carrsville, VA Posts: 129 iTrader: 1 reviews	I myself own a 3.9 and have done a little research on the engine. The only difference between the 3.8 and the 3.9 is the length of the stroke. The 3.9's stroke is approximately .021 longer than the 3.8 which leads me to believe that the difference is in the connecting rods or different size pistons, more than likely, the connecting rods. Now, the heads may also be different to accomodate the longer stroke, however, I haven't delved that far down into it. As far as forced induction, I do know that the ProCharger Intercooled supercharger kit that I have seen on RPMOutlet.com will work and is about the best deal for your money with significantly more bang for the buck, however, due to the nature of the 3.9, you will need to take it to a speedshop and put it on the dyno to get a perfect tune or you may be able to use a Hypertech programmer, maybe even an SCT XCalibrator. Again, I am not sure on that. I hope that this helps out.

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