4.6 exhaust.....anyone have number comparisons for longtubes vs short tube headers???

[ShadowBolt]

On my 4.6 I have the stock T45 and longtubes. With the car on a lift we have been able to get the tranny in/out several times WITHOUT removing the engine/k-member.......but it is a BIT(H!!!!! Even the starter takes an hour just to find the top 2 bolts! I'm making a change and considering shorties if I can still make the numbers.

If I recall.....doesn't the 3650 have the bellhousing attached just like the T45. (actually it does because several buddies run them)

You are correct on the 3650. I run a 3550.


So it is possible to change the clutch with long tubes and a T-45 but my point was you were not going to be able to do it at the track.

JJ

[t500hps]

You are correct on the 3650. I run a 3550.


So it is possible to change the clutch with long tubes and a T-45 but my point was you were not going to be able to do it at the track.

JJ

Agreed. I have a spare tranny and don't even bother bringing it with me.

[Supercharged111]

As a T56 owner I see no need to bring spare transmissions either.

[fscott]

I'm curious, what's the point of running long tube headers? Do they help to flatten/broaden the power curve?

[ShadowBolt]

I'm curious, what's the point of running long tube headers? Do they help to flatten/broaden the power curve?

They were on my car when I bought it.

Jerry

[t500hps]

I'm curious, what's the point of running long tube headers? Do they help to flatten/broaden the power curve?

I've heard long tubes are needed to "make the power numbers". I have no idea since A) That information came from Ford 5.0 owners and B) I bought my car with them and have no experience with anything else.


Is anyone running a 2V and "making the numbers" with shorties???? (If so, what's changed from stock to get there?)

[Sook]

I think Frederic has the 2V engine with shorties that makes the numbers and won a national championship.

- Josh

[fscott]

To be clear, the car won the national championship. I didn't.

The 2v 4.6 made 260hp, and ran manifolds. Aluminum block Romeo with PI heads and intake manifold. It was down to 250 when I got it, due to a bad roller rocker that flattened a cam lobe.