Engine died - should I replace with another 4.6 or go with 5.0?

[B-Mac]

I own a 2001 Qvale Mangusta with a 4.6 DOHC SVT engine mated to a Tremec T-56 tranny that only has 11,000 miles on it. This is the same engine as the 99-01 Mustang Cobra.


Last July at 7,000 miles, the car bottomed out on a dip in the road tearing up the oil pan. I had the repairs made, but 4,000 miles later a rod knock developed. My mechanic says that I should replace the motor because repairing it is going to be more expensive.

I want something with more oomph in the lower range. I would be grateful for advice and insight on what way to go. Some options under consideration:

1) Rustle up a Terminator to swap in
2) Have a Coyote Aluminator installed
3) Have my engine rebuilt and add a supercharger

New 4.6 engines or used engines with low miles are hard to find. I'd be grateful for ideas on where to source one.

I live in Scottsdale Arizona

Thanks much,
Brent

 

[RX1Cobra]

What about grabbing a used 5.0 from a junkyard. You can get an F-150 one for 2500 no problem it seems like. Put a new intake (Boss, CJ or stock Mustang), some headers and should have a pretty good motor. Get the FRPP controller and you should be set. Could add boost later if you wanted... I think the only difference are cams, intake (easy fix) and .5 lower compression ratio. Could get you a pretty stout motor cheap and different.

http://www.car-part.com/cgi-bin/sea...e=2011&userUID=0&userBroker=&iKey=&userPage=3

 

[01yellercobra]

I'd price out the swap against having your current engine rebuilt and go from there. Unless the crank is completely unusable you can build a forged shortblock relatively cheap. Then run a blower and you'll have plenty of oomph.

 

[Martin6107]

The decision always comes down to how much cash and effort you want to put into the project.
This is a pretty good site for sourcing used parts. I've been able to have parts shipped to my door for lower than local prices. Good luck.

www.car-part.com

 

[shurur]

You could also get a stroker crank for 5.0L.
Also you could cam it.

Search the na svt recipe I compiled and got approved.

 

[shurur]

NASVT fixed!!!
NA ~320 RWHP with 99-01 DOHC C-Head 4.6L:
K&N filter
OEM Cams
March damper
March hydraboost and WP pulleys
Long tubes
Hi Flow Cats/Cat Delete mid-pipe
Tune (canned..more $ for real tuner tune)

360-370 RWHP:
106100/106060 comp cams properly degreed.
short runner.
Tune

Stokers are making 400rwhp conservatively.
Dry sleeved BB strokers even more.

 

[B-Mac]

How much should it cost me to have my engine rebuilt with the good forged stuff assuming my crank is still good? Separately, I don't have a great deal of space between the engine and the hood. Which Supercharger is the shortest height wise? TVS? Oh, I live in Arizona and would probably need one that is cooled.



Thanks for your advice and insights.

 

[01yellercobra]

You'll have to talk to a machine shop to get a price. It also depends on how much work you can do yourself. If you have low hood clearance a centrifugal might be your best choice. It mounts to the front of the engine and it's usually pretty low. My F1A was lower than the top of the intake.