Cobra Swap in the GT - Mustang Evolution

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Old 10-18-2010, 07:03 PM   #1
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Cobra Swap in the GT

I've been putting a bit of thought into the future of the the Mustang, and she WILL be turbocharged/supercharged or possibly both. Everyone knows that the stock internals on a GT aren't nearly as strong as the forged internals on a Cobra. The Cobra can withstand upwards of 1100hp from the factory(so I've heard) and the GT will only handle around 425-450. My goal is to be around 650-680 at the rear wheels, with some safety room to go higher if I want, and I probably will.

Now my question is: Should I just go ahead and buy a Cobra motor to save time or keep the 2v engine and build it to handle the extreme power and boost?
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Old 10-18-2010, 10:26 PM   #2
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Re: Cobra Swap in the GT

If you have the money, time and patience go for the Terminator motor.Ive seen it done in a SN95 which is now for sale and it is sick.
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Old 10-18-2010, 10:34 PM   #3
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Re: Cobra Swap in the GT

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Originally Posted by DDTCM View Post
If you have the money, time and patience go for the Terminator motor.Ive seen it done in a SN95 which is now for sale and it is sick.
Sounds good in theory, but I don't make THAT kind of money. I would like to keep the motor in for driving as I build up a Cobra motor. There is a guy here in NC that has a 4.6 block for sale that's bored .20 over
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Old 10-18-2010, 10:39 PM   #4
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Re: Cobra Swap in the GT

I have a 4.6 thats peocharged amoung other things and LOVE IT. its not a race car but will pretty much blow the doors off just about anything I ask of it, and has been super reliable. highly recomend procharger. best wishes and good luck with your project!!
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Old 10-18-2010, 10:42 PM   #5
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Re: Cobra Swap in the GT

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Originally Posted by bryanbrock View Post
I have a 4.6 thats peocharged amoung other things and LOVE IT. its not race car sast but will pretty much blow the doors off just about anything I ask of it, and has been super reliable. highly recomend procharger. best wishes and good luck with your project!!
I love prochargers. But I have three turbochargers sitting in the closet. All I need to turbocharge is the exhaust piping, but the guys that make the single turbo kits won't sell just the exhaust alone.
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Old 10-18-2010, 10:51 PM   #6
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Re: Cobra Swap in the GT

I hear ya! that kinda crap can be annoying. on the other hand as far as torbo's go I olny really like those on 4 and 6cyl cars. sounds stupid but I just think muscle cars need to be super charged if your gonna boost them. I have no good excuse for it its just my prefrence lol but to each his own. good luck with it bro im sure it will be great which ever you choose.
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Old 10-18-2010, 11:02 PM   #7
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Re: Cobra Swap in the GT

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Originally Posted by bryanbrock View Post
I hear ya! that kinda crap can be annoying. on the other hand as far as torbo's go I olny really like those on 4 and 6cyl cars. sounds stupid but I just think muscle cars need to be super charged if your gonna boost them. I have no good excuse for it its just my prefrence lol but to each his own. good luck with it bro im sure it will be great which ever you choose.
When I go to Panama City next summer you'll have to meet up with me and we can have the famous supercharger vs turbocharger battle lol
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Old 10-18-2010, 11:49 PM   #8
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Re: Cobra Swap in the GT

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Originally Posted by 02Nate281 View Post
I love prochargers. But I have three turbochargers sitting in the closet. All I need to turbocharge is the exhaust piping, but the guys that make the single turbo kits won't sell just the exhaust alone.
Really....Just the exhaust piping?

How about intake piping,
intercooler piping,
injectors,
fuel pump,
manifolds,
engine mangagement,
tuning,
possible K member,
oil plumbing lines,
etc.

Built motors are a bad idea if it will be a daily driver. They may be able to withstand more power but forged materials that are used for the internals do not expand and contract at the same rates as the block and over time you will have rocking pistons which leads to oil consumpsion and compression losses. OEM uses materials that are metallugically similar to avoid these types of things
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Old 10-19-2010, 04:01 PM   #9
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Re: Cobra Swap in the GT

Really....Just the exhaust piping?
Yes, just the exhaust.

How about intake piping,
Can do it myself. I can't stomach paying $300 for a few pieces of aluminum and rubber.

intercooler piping,
See above answer.

injectors,
Have them.

fuel pump,
Can be ordered for decent price.

manifolds,
Obsolete. Turbo piping bolts directly to my short headers.

engine mangagement,
Will be done when the time comes.

tuning,
Will be dyno tuned. Plus I have my own tuning software

possible K member,
Obsolete

oil plumbing lines,
Have them too.

etc.

Quote:
Originally Posted by ajpturbo View Post
Built motors are a bad idea if it will be a daily driver. They may be able to withstand more power but forged materials that are used for the internals do not expand and contract at the same rates as the block and over time you will have rocking pistons which leads to oil consumpsion and compression losses. OEM uses materials that are metallugically similar to avoid these types of things
That is why I'm looking at swapping the engine. I considered the Mach 1 engine also.

All in all, I know what I'm getting into. This is not my first project car. Everything WILL be done right, and patience will be taken with this.
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Old 10-20-2010, 06:33 PM   #10
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Re: Cobra Swap in the GT

Oh my.....Hey bud, manifolds are not obsolete. Turbo exhaust manifolds have special flanges welded on to bolt to the flange on the turbo and need to have an outlet pipe welded to it accomodate the wastegate.

Or you could have a rear mounted turbo like STS and it goes downstream of the manifolds but not the best idea with a dual exhaust.
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Old 10-20-2010, 09:54 PM   #11
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Re: Cobra Swap in the GT

Why not buy new shorty headers and have a turbo flange welded to them and get a turbo with internal wastgate? Here are something you might be interested in.




05 06 07 08 FORD MUSTANG GT 4.6L SHORTY HEADER EXHAUST: eBay Motors (item 350404217593 end time Oct-21-10 17:16:07 PDT)

Garrett Steel T3 Inlet Weld On Flange T3/T4 ORIGINAL: eBay Motors (item 380125322898 end time Nov-09-10 23:03:14 PST)
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Old 10-22-2010, 05:55 PM   #12
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Re: Cobra Swap in the GT

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Originally Posted by Wallas View Post
Hi im new to this forum & i was just wondering what you guys think about this?

I'm not linking the url

does this look like a legit 04 Cobra engine & price???
SPAM
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Old 10-22-2010, 05:57 PM   #13
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Re: Cobra Swap in the GT

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Originally Posted by ajpturbo View Post
Built motors are a bad idea if it will be a daily driver.
Yea? Tell that to these guys:
www.SVTPerformance.com
www.SVTEnthusiast.com
SVT Owners Association - What's Happening at SVTOA

or anybody else driving around a DD forged bottom end Cobra.....




EDIT: For some reason I thought you put "Forged" not built. I agree with you but was making a point if you had said "Forged"
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