mach or not

bboylobo · Feb 10, 2009

I have a 2001 gt. i baught in july. Since then i have learned that the car came with 373 gears in the back and a CAI. but i dont know what else it has. I havent run it on the track yet but i have raced quite a few cars and everyone tells me that the speed in the car is not normal for a pretty much stock gt with 373 gears.

The only other thing that i can think of is that its a mach 1 or maybe there is some kinda tune i just dont know how to check what the car had done to it before i baught it.

How do you check if you have a 2v or 4v. Also, if you thought your car had work done to it before you got it, how would you check?

The car has a mach 1 hood scoop but there are no decals or anything associating it with a 4v. can i check the vin or car tag for this info?

calboss281 · Feb 10, 2009

The Mach 1 didn't come out till 2003, so that's your answer on that.

As far as how to check, you can check your exhaust pretty easily. If you pop your hood and look down the side of the engine block from the Driver's side...you should be able to tell whether or not the car has headers. If it has some headers, they will be clearly visible as 4 distinct and unique pipes leading off from the side of the block. Some might even have a name on it like "JBA HEADERS".

You can then get on the ground near the car, and look down the center. If you see no cats (catalytic converters) on the mid-pipe...then you know it's been changed. Also, if you see it making an "X" shape as opposed to a "H" shape, you know it's been changed. Finally...if the exhaust pipes in the back are any wider than 2.5", they are probably new.

Other engine mods are harder to spot:

A timing adjuster is a blue wheel that sits on the front of the crank wheel.

Underdrive pullies have unique gaps in their design as opposed to a solid piece of steel.

The standard Mustang throttle body and plenum is 65mm, and has a Mustang pony emblem.

A supercharger would be visible: it would look like a large tubular mechanism attached to the belt system, with pipes leading to and from the air intake system.

That's pretty much it as far as visible mods that would affect the engine's power. To check on cams/rollers/valves/compression/pistons/fuel pump...you'll need a shop.

bboylobo · Feb 10, 2009

so 4v engines didnt come out till 2003? I didnt know that. thanks

Ill give it a look and see if there are any visible mods like you said. i know its an h pipe but i didnt check for headers.

calboss281 · Feb 10, 2009

bboylobo said:
so 4v engines didnt come out till 2003? I didnt know that. thanks.

Well that's not 100% accurate. The Mach 1 didn't come out till 03, but the 4v motors were around ever since the 99 Cobra I believe. The 4v motor was originally just the cobra motor with some SVT extras, then in 2003 they made the Mach 1 (which is essentially the same thing as the older cobra minus the IRS) and put on a supercharger to the cobra model.

mrvax · Feb 10, 2009

calboss281 said:
Well that's not 100% accurate. The Mach 1 didn't come out till 03, but the 4v motors were around ever since the 99 Cobra I believe. The 4v motor was originally just the cobra motor with some SVT extras, then in 2003 they made the Mach 1 (which is essentially the same thing as the older cobra minus the IRS) and put on a supercharger to the cobra model.

I think the 4v 4.6L was available in Cobras in 1996.

bboylobo · Feb 10, 2009

how can you tell if you have a 4v engine.

98stangv8 · Feb 10, 2009

bboylobo said:
how can you tell if you have a 4v engine.

Put a picture of the engine on here and we can tell you...

calboss281 · Feb 10, 2009

You don't need pics to show us. If your oil cap is on the Driver's side...it's a 4v. If it's on the Passenger, it's a 2v. Also you can just google "03 cobra motor" and "02 mustang GT motor" and look at the differences:

-2v motor has black cylinder head caps, the 4v motor has silver or steel colored ones

4v:
http://www.allfordmustangs.com/foru...2357148-my-new-cobra-motor-cobra-pics-011.jpg

2v:
http://lib.store.yahoo.net/lib/mustangtuning/crides000032-4.jpg

98stangv8 · Feb 10, 2009

calboss281 said:
You don't need pics to show us. If your oil cap is on the Driver's side...it's a 4v. If it's on the Passenger, it's a 2v.

yes...but if he gives us a picture, we can also help him with things that may have been upgraded on it...

calboss281 · Feb 10, 2009

I prefer to help people help themselves, rather than just telling everyone how to do things.

blubullett · Feb 10, 2009

If your oil cap is on the Driver's side...it's a 4v. If it's on the Passenger, it's a 2v. Also you can just google "03 cobra motor" and "02 mustang GT motor" and look at the differences:

Mine is on the drivers side?

SaleenGT2001 · Feb 10, 2009

thats not a mach 1 scoop either.

it is a stock scoop painted black

eliteJAE · Feb 10, 2009

i thought oil filler position had to do with romeo/windsor differences, not 4v vs. 2v

the best way to distinguish the engines is the SIZE of the actual heads lol

take a good hard look at pics of 32v modular fords and then a good look at your engine

ThunderHorse · Feb 10, 2009

SaleenGT2001 said:
thats not a mach 1 scoop either.

it is a stock scoop painted black

+1 Mach 1s have a shaker system. Not that fake ass GT "scoop". Sorry but this is one of the design flaws that Ford put on our cars that still urks me. Lol. Also the GT badges on the sides are a pretty good indiciation as well.

bboylobo · Feb 11, 2009

Ok that puts things into perspective. ill try to get a good pic of the engine later today if i get the time. i appreciate all the feedback. now im certain its a 2v.

I agree with the hood scoop being a design flaw. i wish it were functional.

mransr · Feb 11, 2009

the hood scoop is functional...it makes the car look better

twogts4us · Feb 11, 2009

Easiest way is to check the VIN - a true Mach 1 has an "R" in the eighth position...(yep, they are truly R Code cars).

04YELLOWGT · Feb 11, 2009

mransr said:
the hood scoop is functional...it makes the car look better

And it holds water very good too.

bboylobo · Feb 11, 2009

just out of curiousity. how hard is it to install a functional hood scoop.

flstang65 · Feb 11, 2009

4v's were also available in Lincolns in the mid 90's

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