2v to 4v swap
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good info. So the cheapest/best weight 2 power route to 4v is a mark 8 motor with a cobra intake and cams. What year mark 8 am I looking for to get the teskid and how do I identify it? Which cams need to be replaced (and I heard something about weak springs in a mark 8 motor)? Are the motor mounts the same (I am guessing yes) and will my 1997 gt 5 speed bolt up to this motor. I know I will need different long tubes. What power does this setup make out of the box (whp) and how heavy can you hit it with nitrous?
I agree with BVH's answer only when using forced induction IE: Turbo/Blower (regarding the 4.6 vs 5.4 HP theory).
NA wise,.. and nitrous should also fall into this catagory IMO,.. the 5.4 is the way to go. The 5.4 will out do the 4.6 by 100 RWHP. A fully built 4.6 DOHC usually tops out at around 360 - 380 RHWP. The 5.4 can top at at 460 - 480 RWHP. That is a money no object,.. no expense spared build up of each motor. And when done right,.. there is closer to 60 - 80 ft/lb torque difference between the two. Everything I've read,.. Sean Hylands books, Pappito's articles and various online articles all re-affirm what I have posted above.
One thing you need to understand before you go out spending an ass load of money on DOHC parts. ALL 1992 - PRESENT 4.6 ENGINES (Except the 03/04 Cobra engines) USE THE SAME POWDERED METAL RODS AND HYPERUECTIC PISTONS. UNLESS YOU USE FORGED RODS AND PISTONS,... ANY 4.6 - 5.4 ENGINE (Except the 03/04 Cobra engines and the SHELBY GT500) IS NO STRONGER THEN THE 4.6 IN YOUR CAR NOW AND SHOULD NOT EXCEED 400 - 425 RWHP BECAUSE OF THE FACTORY RODS USED). Sorry for the caps,.. but if you had read my post for Jeff you should already know this and I feel like I am beating a dead horse re-writing all this.
So in theory,.. if your making (With nitrous) 425 - 435 RWHP in your 4.6 right now,.. even though a DOHC engine can easily exceed that number,. it is still NOT STRONG ENOUGH to handle more then that amount.
Even if you bought a brand new 96 - 98 DOHC Cobra motor with Teksid block and all,.. you still are physically restricted to 400 - 425 RWHP because of the rods used in these engines. Even though the engine can easily make 575HP with nitrous,. anything over 425 RWHP is generally considered a ticking time bomb waiting to happen. A 125 shot of nitrous is usually considered safe. You can spray more,.. but at your own risk and should use additional safe guards to keep the engine together,.. (Window switch, progressive nitrous controller, etc etc. Well you should always use a window switch,.. but many dont).
As far as intakes to use on the 5.4 engines,.. Professional Products and a couple others now make adapter plates that will allow any 99+ 4.6 SOHC/DOHC intake to be used on any 99+ 5.4 SOHC/DOHC engine. Reichard Racing makes DOHC specific 4.6 to 5.4 intake adapter plates. I also read that Sullivan will soon be offering both SOHC and DOHC 4.6 to 5.4 intake adapters. So intake choices vary widely now from stock 99 - 01 Cobra, Marauder/Mach1, Sullivan, BBK, or various custom sheetmetal intakes like the Hogan and such. Its taken a while,.. but the aftermarket is starting to catch up with the modular engines.
As far as interchangeability,.. all 4.6/5.4 (All RWD versions) use the same transmissions, heads, pistons,.. its all interchangeable.
Hurst
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Originally Posted by Tiffiny
"We all heart the Hurst"
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Sullivan are junk. imo.. jim is on point. ruler if i where u i would do a 2v 5.4 with high compression pistons steel rods and a 200shot.u got most of the parts just get a 5.4 short block and build it.. there was one in tampa that had a setup like that and it was nasty...
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If your gonna keep spraying then id just build on the set up you already have, ported 2v heads and cams would work real well on your car with a built bottom end. I wouldnt waste my time on a 5.4 2v if your using spray, in my opinion only the 5.4 4v is worth putting in a mustang but id still use a 4.6 aluminum 4v first but that is just me.
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in memory of Kevin Gonzalez 6/21/86 - 9/13/06
in memory of Kevin Gonzalez 6/21/86 - 9/13/06
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I will probably see what I can get out of my setup before I go to 4v. I would like to find some 03-04 cobra rods and some pistons. I dont know what cams to use in my setup. I had so much trouble with the last set that went in because of the pi swap clearances.
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Modularheadshop sells some ptv friendly cams. Ive had no issues with my bullet cams and there not that small, but i did degree them in though. I still think it would be cheapest to work with what you already got.
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in memory of Kevin Gonzalez 6/21/86 - 9/13/06
in memory of Kevin Gonzalez 6/21/86 - 9/13/06
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Timing cover, tensioner for the timing chains, intakes and various other things
will it work yes, is it a lot of work yes,
the heads will bolt on but everything else needs to be done to finish it
will it work yes, is it a lot of work yes,
the heads will bolt on but everything else needs to be done to finish it
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printed keyrings
printed keyrings
