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2005-2010 Mustang Talk Forum

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Unread 04-01-2009   #1 (permalink)
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Default 2003-2004 iron cobra shortblock in a 2005 Mustang?

im trying to decide on what short block to use in my car. i am told the 3v heads will bolt right up to the iron block but im wondering what wont work with the older block. i say this because im trying to make a choice fairly quickly on what short block to buy from MMR. all the short blocks im looking at are the 03-04 cobra block with an option to upgrade to the current aluminum unit but at a heaftly price... its a thousand dollar diffence between the two. i called MMR and they said the only thing i will need is an adaptor plate for the engine mount. i just cant belive that the two blocks are the same except for the material they are made from. anyone have a cobra short block in their 05+ cars?
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intercooler/smaller pully to come...
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Unread 04-01-2009   #2 (permalink)
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Quote:
Originally Posted by tltcracing View Post
im trying to decide on what short block to use in my car. i am told the 3v heads will bolt right up to the iron block but im wondering what wont work with the older block. i say this because im trying to make a choice fairly quickly on what short block to buy from MMR. all the short blocks im looking at are the 03-04 cobra block with an option to upgrade to the current aluminum unit but at a heaftly price... its a thousand dollar diffence between the two. i called MMR and they said the only thing i will need is an adaptor plate for the engine mount. i just cant belive that the two blocks are the same except for the material they are made from. anyone have a cobra short block in their 05+ cars?
I'm running the 2004 Cobra Iron Block from MMR, in my 05 GT its the 600 race Mod. motor. There correct a plate is required.
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Unread 04-01-2009   #3 (permalink)
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and the engine mounting plate is the only thing thats needed? did you reuse the factory 3v head? was there anything from your old block that you needed but didnt fit for the iron one? what all options did you buy additinaly to the 600 (ie. mainstuds, piston coatings, oil pump)?
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Paxton Novie 1200SL, Comp NSR Blower Grind 2, MMR Shortblock, C&L 95mm Mass/Air sensor, 39lb injectors, Motoblue ignition coils, Motoblue throttle plate spacer, Borla XR-1 Long Tube Headers and no cat x-pipe, Hooker Aero Chamber muffler, Custom LaMotta Performance tune, G-force tires, B&M shifter, Kennybell b-a-p, AEM analog A/F gauge, Interceptor scan gauge, McLeod RST clutch, aluminum flywheel
intercooler/smaller pully to come...
and yes it is my DD
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Unread 04-01-2009   #4 (permalink)
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Check your PM and call me.............
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Unread 04-02-2009   #5 (permalink)
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MMR is amazing. I'm putting the 5.0 stroker in eventually!

Modular Mustang Racing
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Unread 04-02-2009   #6 (permalink)
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I wouldnt want that extra 80 pounds. MMR also overbores cylinders .020 which is another thing I dont realy want in a OEM 4.6 shortblock.
Not really amazed at that MMR stuff but the Livernois all aluminum sleeved big-bore shortblock does look like a really sweet option. 326 cubic inches!!
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Unread 04-02-2009   #7 (permalink)
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im going with the iron block mainly out of desperation. this engine trouble is killing me and with not going for the aluminum i save about a thousand dollars. i wish i could do a no-expence-spared build but thats not an option.
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intercooler/smaller pully to come...
and yes it is my DD
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Unread 04-02-2009   #8 (permalink)
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Default Frpp

What do you all think of the new Ford Racing 3V forged shortblock. It is around $4300. Thanks...
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Unread 04-02-2009   #9 (permalink)
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i do like alot of the short block options. so many to choise from. i ended up ordering a iron short block from MMR today. i bought some extras as well, like headstuds and their oil pump. should be done in about 2 weeks. maybe i can have my car back then... i've been ridding my dad's harley around for the past two weeks...
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2005 Mustang GT
Paxton Novie 1200SL, Comp NSR Blower Grind 2, MMR Shortblock, C&L 95mm Mass/Air sensor, 39lb injectors, Motoblue ignition coils, Motoblue throttle plate spacer, Borla XR-1 Long Tube Headers and no cat x-pipe, Hooker Aero Chamber muffler, Custom LaMotta Performance tune, G-force tires, B&M shifter, Kennybell b-a-p, AEM analog A/F gauge, Interceptor scan gauge, McLeod RST clutch, aluminum flywheel
intercooler/smaller pully to come...
and yes it is my DD
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Unread 04-02-2009   #10 (permalink)
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Quote:
Originally Posted by tltcracing View Post
i do like alot of the short block options. so many to choise from. i ended up ordering a iron short block from MMR today. i bought some extras as well, like headstuds and their oil pump. should be done in about 2 weeks. maybe i can have my car back then... i've been ridding my dad's harley around for the past two weeks...
Good choice, dump the oil pump and go factory Ford non-racing, you will thank me later.
Also MMR does not over bore unless the customers requests it.
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Unread 04-02-2009   #11 (permalink)
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Quote:
Originally Posted by tltcracing View Post
i do like alot of the short block options. so many to choise from. i ended up ordering a iron short block from MMR today. i bought some extras as well, like headstuds and their oil pump. should be done in about 2 weeks. maybe i can have my car back then... i've been ridding my dad's harley around for the past two weeks...
SWEET!

What did you exactly order? Specs and all???

Dude I'm so excited for you!!!
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Unread 04-03-2009   #12 (permalink)
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We have the MMR 5L stroker model 950, with the cobra block. Abused it plenty over the last year. Had some GT500 pump issues during that time and suffered lean conditions from time to time. Lost head gaskets and pistons in November at 27 lbs of boost. Everything else held together. Rebuilt engine stronger and switched to Livernois heads & cams while motor was out. Car at tuners. Back at track in a couple of weeks.
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Unread 04-03-2009   #13 (permalink)
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MMR 4.6 Street Mod 600 (up to 600HP) 2V, 3V or 4V
The perfect replacement for your forced induction or NOS GT
*Brand New Cast Iron 2004 Cobra Block, torque plate bored and honed
*New Ford Racing Cast Iron Crankshaft rated up to 600HP (8 bolt or 6 bolt)
*New 4340 5.933 MMR (Modular Mustang Racing) H-beam Rods, these rods are
shotpeened, magnafluxed and weight matched w/ ARP rod bolts
*New Forged Manley lightweight pistons
*Speed Pro file fit rings (precision file fit to your application,
nitrous, blower, turbo or N/A)
* Tri-metal Rod and Main bearings
*Complete Pro Assembly and Balancing for the smoothest, highest revving
shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.






^^^ thats the one i bought. i opted for standard compresion. whats the deal with the oil pump? this car is an everyday driver and i dont want any thing to worry me once its done.
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2005 Mustang GT
Paxton Novie 1200SL, Comp NSR Blower Grind 2, MMR Shortblock, C&L 95mm Mass/Air sensor, 39lb injectors, Motoblue ignition coils, Motoblue throttle plate spacer, Borla XR-1 Long Tube Headers and no cat x-pipe, Hooker Aero Chamber muffler, Custom LaMotta Performance tune, G-force tires, B&M shifter, Kennybell b-a-p, AEM analog A/F gauge, Interceptor scan gauge, McLeod RST clutch, aluminum flywheel
intercooler/smaller pully to come...
and yes it is my DD
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Unread 04-04-2009   #14 (permalink)
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And here I thought I'd never be jealous of people with forged motors.....
ugh Enjoy the beefy motor man. Maybe one day I'll give in :P
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Unread 04-04-2009   #15 (permalink)
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Quote:
Maybe one day I'll give in
If your sig power levels are reliable, that day be sooner than you think. I have to two local buddies pushing about that much torque and between them they have lost: 1 rearend, 2 transmissions, 1 motor, 2 clutches.

They do however push their cars hard at the track and on the street.
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