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GT block same as Cobra block...

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Old 09-21-2005, 12:04 PM   #1
Dan9687
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Default GT block same as Cobra block...

Does a 99'-04' Mustang GT have the same 281 block as a 99'-04' Cobra??? Thanks!


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Old 09-21-2005, 04:05 PM   #2
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Default RE: GT block same as Cobra block...

I believe that the 99-04s have a 302 engine block, but I may be wrong.
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Old 09-29-2005, 06:42 PM   #3
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Default RE: GT block same as Cobra block...

GT=iron block
Cobra=aluminum
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Old 01-09-2006, 11:20 PM   #4
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Default RE: GT block same as Cobra block...

03 04 cobras have cast iron blocks.earlier 4.6 cobras are aluminum.
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Old 01-16-2006, 12:08 PM   #5
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Default RE: GT block same as Cobra block...

cobra and Gt blocks are very close to the same. the only diffence is two bolts in the front cover. from what i have read you can get buy with just using a lot of silcone sealant to keep it fome leaking.

btw the 03 04 cobra has and iron block. and they quit using a 302 in the mustangs and cobras in 95.
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Old 02-04-2006, 09:33 PM   #6
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Default RE: GT block same as Cobra block...

99-04 have 302's
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Old 02-06-2006, 09:07 AM   #7
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Default RE: GT block same as Cobra block...

Quote:
ORIGINAL: redgt2000

99-04 have 302's
I love how he sounds so confident. No, 99-04's are 4.6's
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Old 04-03-2006, 04:23 PM   #8
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Default RE: GT block same as Cobra block...

The 2003 SVT Mustang Cobra’s 4.6-liter, DOHC V-8 is equipped with an Eaton™ supercharger and new aluminum alloy cylinder heads that provide increased flow capabilities. The engine produces 390 horsepower at 6,000 rpm and 390 foot-pounds of torque at 3,500 rpm, compared with the 2001 model’s 320 hp at 6,000 rpm and 317 foot-pounds of torque at 4,750 rpm.

To provide strength necessary for the substantially increased torque output, the new Cobra engine is built on a cast-iron block. This unit contains the carryover forged-steel crankshaft, which is fitted with new Manley forged "H-beam" connecting rods, forged pistons similar to those in the SVT F-150 Lightning, and an aluminum flywheel similar to the 2000 SVT Mustang Cobra R’s.

The engine is mated to a TTC T-56 6-speed manual transmission. Behind that, an aluminum drive shaft with upgraded universal joints connects to the rear axle, which now has a 3.55:1 gear ratio

The above is per: — John Coletti, chief engineer for Ford SVT

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Old 04-03-2006, 04:27 PM   #9
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Default RE: GT block same as Cobra block...

Quote:
ORIGINAL: BamBam

The 2003 SVT Mustang Cobra’s 4.6-liter, DOHC V-8 is equipped with an Eaton™ supercharger and new aluminum alloy cylinder heads that provide increased flow capabilities. The engine produces 390 horsepower at 6,000 rpm and 390 foot-pounds of torque at 3,500 rpm, compared with the 2001 model’s 320 hp at 6,000 rpm and 317 foot-pounds of torque at 4,750 rpm.

To provide strength necessary for the substantially increased torque output, the new Cobra engine is built on a cast-iron block. This unit contains the carryover forged-steel crankshaft, which is fitted with new Manley forged "H-beam" connecting rods, forged pistons similar to those in the SVT F-150 Lightning, and an aluminum flywheel similar to the 2000 SVT Mustang Cobra R’s.

The engine is mated to a TTC T-56 6-speed manual transmission. Behind that, an aluminum drive shaft with upgraded universal joints connects to the rear axle, which now has a 3.55:1 gear ratio

The above is per: — John Coletti, chief engineer for Ford SVT

And isn't the 03/04 Cobra block a 4-bolt main vs the 2 bolt main of the GT?

Edit: also since the Cobra of 03 and 04 are DOHC the heads are different so the bolt pattern is probably not the same since the head gaskets will be different.
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Old 05-19-2006, 06:10 PM   #10
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Default RE: GT block same as Cobra block...

NO THEY DON"T if it was a 302 it would be a 5.0 motor instead of a 4.6
Quote:
ORIGINAL: redgt2000

99-04 have 302's
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Old 06-06-2008, 10:37 AM   #11
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Default RE: GT block same as Cobra block...

Quote:
ORIGINAL: redgt2000

99-04 have 302's
And with such conviction even. But....
94-95 sn95 302HO
96-98 sn95 281
99-04 NewEdge 281 PI (Power Imporved)
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Old 06-06-2008, 09:48 PM   #12
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Default RE: GT block same as Cobra block...

Quote:
ORIGINAL: Derf00

Edit: also since the Cobra of 03 and 04 are DOHC the heads are different so the bolt pattern is probably not the same since the head gaskets will be different.
You can bolt 4V heads onto any GT block, it has been done many times in the past.

There is a difference between the 99/00 and 01 & up block.

The 99/00 were Windsor block, whereas the 01 & up were being made back in the Romeo plant. The reason the 99/00 were made in the Windsor plant was because of a fire in the Romeo plant. The block are slightly different.
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Old 09-24-2008, 07:44 PM   #13
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Default

the bolt patterns are the same for the heads but they are a 4 bolt main. that is the difference. the base of the 4v and 2v heads are the same, but the top of the 2v heads are slimmer that's why they look so different.

and if you think the 99-04 are 5.0 you really need to find another car forum.
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Old 09-24-2008, 08:31 PM   #14
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The conversion to the cast iron block to handle the heat/stress of the 03 - 04 Cobra powerplant, along with its accompanying added weight for the Terminators over their aluminum blocked 96 - 99/01 counterparts, is analogous to knowing your ABC's. Almost something you have to know...
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Old 09-25-2008, 07:22 AM   #15
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Quote:
Originally Posted by mills281e View Post
The conversion to the cast iron block to handle the heat/stress of the 03 - 04 Cobra powerplant, along with its accompanying added weight for the Terminators over their aluminum blocked 96 - 99/01 counterparts, is analogous to knowing your ABC's. Almost something you have to know...
Wait a minute....... now, I KNOW Michael Jackson sang that song! So this whole 302/4.6 thing is just a ploy to distract us from the real truth.
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Old 09-25-2008, 07:22 AM
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