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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 01-10-2007, 08:50 PM   #1
machzilla
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Default Need help quick: How to tell if this is a true Cobra motor?

Well I'm going to look at motor tomorrow that I've been told came out of a '93 Cobra. Has 61K miles, came out of a car that had been rolled and totaled. Here's the question: How to tell if it's a true blue Cobra and not some POS a dude bolted a cobra intake onto.
I know what the differences are internally with the Gt40 heads and 1.7 rollers and all that but how to tell by looking at it while it's sitting on a trailer? What's the biggest clue I can readily see from the outside?
Anything that will prove it without a doubt?
Thanks in advance-
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'89 GT 5-speed
76mm C&L mass air
65mm TB
Cobra intake
1.6 rollers
Edelbrock aluminum heads
Trick Flow stage 1 cam
Ceramic shorties
O/R X-pipe, Pypes exhaust
Zex 75 dry shot
3.73's
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Old 01-10-2007, 08:52 PM   #2
AdderMk2
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

24# injectors and cobra stamped valve covers
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Old 01-10-2007, 08:53 PM   #3
5.0stanger
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

make sure they are gt-40's.
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Old 01-10-2007, 09:22 PM   #4
gspfunk
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

I don't know the #'s off-hand, but find out what the block #'s should be as well as the tranny #'s. The Cobra's had an upgraded WC T5 tranny w/ steel bearing retainer and a few other things....rated at 310 tq instead of 300 like the WC.
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Old 01-10-2007, 09:54 PM   #5
mnile9127
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

Quote:
ORIGINAL: AdderMk2

24# injectors and cobra stamped valve covers
+1 Blue injectors, Gt-40 casting on the Heads
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Old 01-10-2007, 09:59 PM   #6
wythors
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

The valve covers should also be stamped steel, not cast aluminum.

Click the image to open in full size.
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GT-40X303 heads, E-cam, 1.6 roller rockers,
Cobra intake, Edelbrock 65mm t/b, 73 mm C&L, CAI,
24 lb injectors, AFPR, 3.73's, March underdrives.
FRPP headers, Bassani catted X, SLP Loudmouth.
Pony R's with Eagle ZR's.
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Old 01-10-2007, 10:09 PM   #7
machzilla
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

Ok, so blue injectors, stamped steel valve covers, and how to tell for sure on the heads?
Where to look on the heads for the Gt40 stamp? Is it cast in somewhere above the exhaust ports?
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'89 GT 5-speed
76mm C&L mass air
65mm TB
Cobra intake
1.6 rollers
Edelbrock aluminum heads
Trick Flow stage 1 cam
Ceramic shorties
O/R X-pipe, Pypes exhaust
Zex 75 dry shot
3.73's
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Old 01-10-2007, 10:31 PM   #8
tortugasmoker
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

mine is supposed to be a cobra motor too, but i dont know how to tell either, its really fast and its got a lot of goodies though, it also has denso yellow injectors i dont know how to tell what lbph they are though , it also came with a massive pro-m intake and a huge MAF sensor but i dont have a filter for it and its hard to find one that big.
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Old 01-10-2007, 10:45 PM   #9
mnile9127
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Default RE: Need help quick: How to tell if this is a true Cobra motor?

Casting is on right corner of the heads. You have to be looking at the heads from
the exhaust sides. GT casting on the top and bottom right corners.
I had to look on my car. It's cold as hell, outside!!!!
GTP casting = GT-40P (spark plug bolt on different)
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Old 01-10-2007, 10:45 PM
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