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View Full Version : Supercharging stock 4.6 DOHC motors



Russ Jerome
02-09-2009, 01:20 AM
I see these stock superchargers on e-bay all the time:
http://cgi.ebay.com/ebaymotors/03-04-Mustang-Cobra-Eaton-Supercharger-4-6-99-01-M112_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1171Q7c66Q3a 2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q 3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZite m230323376578QQitemZ230323376578QQptZMotorsQ5fCarQ 5fTruckQ5fPartsQ5fAccessories

If you were to cobble this under the hood of a 1998
Lincoln Mark VIII with its aluminum 4.6 DOHC thats
rated at around 280 what can you expect to gain HP
wise? Pulley swap HP increse guess?

STANMAN
02-09-2009, 05:57 AM
Thinking about doing that gives me headaches as the motor in the Lincoln is transverse mounted. I would think the HP would be about the same as a Cobra after finished though.

Windsors 03 Cobra
02-09-2009, 07:41 AM
No the Mark Series is RWD, bolt it on, tune it up and get 400HP to start, its 03 Cobra junk. :D

I think the Marks have cast cranks, hypereutectrash slugs and powdered rods so those will be some limiting factors. Thankfully they are also equipped ith the holy grail of 4.6 performance a TEKSID block. :wow
Pretty sure all slushbox 4.6 DOHC's are cast crank equipped.

DurtyKurty
02-09-2009, 10:44 AM
Like any other 4.6, they should handle 5-7lbs of boost (similar to the 96-98 cobras) the rods are the weak points followed by the pistons. The biggest hurtle your going to face is the lower intake. All the lincolns are B heads. All those superchargers are designed around the '99 up C head. The one in that auction doesn't even include the lower intake and heat exchanger.

It could be done though. It's just time and money. :)

Russ Jerome
02-09-2009, 11:12 AM
The lower intake was another Q, thanks on the replies.

STANMAN
02-09-2009, 11:54 AM
No the Mark Series is RWD, bolt it on, tune it up and get 400HP to start, its 03 Cobra junk. :D

I think the Marks have cast cranks, hypereutectrash slugs and powdered rods so those will be some limiting factors. Thankfully they are also equipped ith the holy grail of 4.6 performance a TEKSID block. :wow
Pretty sure all slushbox 4.6 DOHC's are cast crank equipped.

Yeah, I was thinking the Continental for some reason. It was early:rolf

70 cutlass 442
02-09-2009, 04:21 PM
I think everyone has pretty much hit the nail on the head.... the rods will limit you, but still, 5-7 lbs will wake that motor up a bit, especially down low which is where my complaint has always been (especially on the 2V 4.6) needless to say it would be a cool project.

Russ Jerome
02-10-2009, 10:07 PM
From what I can gather 450hp is a pretty fair limit for the Lincolns
cast lower end. More I read the HP gains on these setups is pretty
weak, cant believe how much HP is lost vs 7 psi from a turbo :(

DurtyKurty
02-11-2009, 12:13 PM
...cant believe how much HP is lost vs 7 psi from a turbo :(

I take it you mean a turbo compared to a Heaton?

Russ Jerome
02-11-2009, 12:31 PM
Ya I was reading "Street supercharging" book after I posted
the question. I know from personel experience the returns of
an exhaust driven turbine (turbo) at 7 psi but the supercharged
return at the same psi is lower obviously due to the parasitic
drag of the belt and CFM limitations.

A used factory supercharger is still cheap HP compared to me
fabbing up manifolds and plumbing for a turbo, turbos returns
are far above but with a 450hp limit not needed.

Keyser Zosig
02-27-2009, 08:48 AM
I understand that you need to change the crank pulley, or modify the serpentine belts among many other things to get a stock terminator blower to work. I faintly remember reading about this a while ago in my Muscle Mustangs and Fast Fords magazine, the author of the tech article reccomended against attempting the swap over just buying an aftermarket blower.