[V6 5TANG]

My question is whats the difference between the 3.8 and 3.9. does it make a difference in hp and torque

[Big Daddy's Stang>]

Yeah the 3.9 which only came out on 2004 has 193hp and 224 tq 4-5 more torque and 3 hp more than the 3.8 stang

[ESG-642T]

In other words if you ran a 3.8L vs 3.9L and everything was equal you would both be right beside eachother.

[ewells2420]

Originally Posted by ssstang

In other words if you ran a 3.8L vs 3.9L and everything was equal you would both be right beside eachother.

lol yeah in other words, no difference.

[StalkerStang]

The 3.9L is the same as the 3.8L, but the 3.9's have a slightly longer stroke. Nothing crazy.

[232-K7]

stalkerstang, whats the actual difference between the 232/238 ?
some people say the crank is different, some people have said the 3.9L uses the same crank/pistons/bore, but use a slightly longer connecting rod. lol so which is it?
just curious

[StalkerStang]

Pretty sure its the stroke, the 3.8's have a 3.39 stroke, 3.9's have a 3.4646 stroke.

But there is a difference in compression distance from the piston pin to top of piston. 3.8's are 1.45 and 3.9's are 1.4106, not sure if that helps or not, lol.

[232-K7]

Originally Posted by StalkerStang

Pretty sure its the stroke, the 3.8's have a 3.39 stroke, 3.9's have a 3.4646 stroke.

But there is a difference in compression distance from the piston pin to top of piston. 3.8's are 1.45 and 3.9's are 1.4106, not sure if that helps or not, lol.

so your saying the 238 uses taller pistons?
the rods and crank are the same?

[StalkerStang]

Rods are the same at 6.091, but the crank is a different stroke.

The piston for the 3.9 is a little shorter from the piston pin to the top.