Put on and seems sluggish any info?

 

Well what else do you have on the car?

 

Unless you are F/I its too big and will be sluggish

 

it is a fairly low velocity intake, so it should be a little less peppy off the line, but should help it breathe above 3k or so.

 

I have same part on mine. Only thing I noticed was a little whistling when accelerating hard. Do you have a tuner?

 

Bbl headers h pipe jlc cold air no tuner yet is that the problem?

 

Not sure if that will help your problem, but you may benefit from getting a tuner either way.

 

And 3:55 wheels are front 18/9 rear are 18/10.5 gt 500 wheels

 

F/I ?

 

Forced Induction ie a supercharger or turbo.

 

No it's not I just bought this car trying to figure it out. Thank You! I have the stock intake should I put it back on?

 

It all depends on your plans. If that is your plans though, I'd be glad to take it off your hands.

 

Yea forced induction should definitely be ur next step if u wanna get the full potential out of her

 

Did u chip it yet?

 

Not yet have been thinking about it would that help it? Never had a 4.6

 

Like All the other comments, 78mm is pretty big unless your car has a power adder. A tuner is pretty much a must...it will waken the car up pretty good with the supporting mods you have.

 

Thanks that will be next Thanks

 

im planning on getting that 78mm. these 2v have no top end... we all know that. thats why i want it. i was thinking cams down the road too. but it all depends how you want to drive your pony.

 

78mm is a bit big for a mostly stock 4.6L. I've seen some test data and it really does not make much sense to go much bigger than 70mm. Now if you had ported heads, and a big set of cams, you would be able to take advantage of such a large TB. Also, like others have said, F/I would also benefit from a large TB as well.

 

Believe me when I tell you that installing a larger throttle body. You don't see a big jump on the horse power. I've installed over $6000.00 in upgrades on my 2003 GT 4.6 2v. My Dyno #'s are 270rwhp , and 312 torque. I was expecting at the least 300rwhp.