How much power can the stock Mustang GT block handel ?

block81

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Hello :)

next month i upgrade my car with an 2.65l supercharger.

How much power can the stock block handel ?

A guy from my garage told me that on his mustang with over 800rwhp the block begins to crack and he had to put out 3 times the complete engine to fix that.....

Is this normal or just a bad block on his car ?

He said to me i should stay at max 700 till 750 rwhp to be save.

Is this true or what are your experiences ?

 

Zelek

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From what I've read on this forum, 800 seems to be the limit before things start getting extreme. Personally, I would say 700-750 is a pretty solid number. These stock blocks have handled 1000+ HP but no one knows for how long that truly is. This is probably better suited for the FI section because many of those guys have been running 700+ setups for many miles.
 
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block81

block81

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Thx.... also the garage guy told me if i want to go over 800 rwhp i should change to the 2018 / 2019 block because its more stable...
 

bluebeastsrt

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There is no magic number. But 800 seams to be a reasonable number to stop at. Once you ad boost. There is no guarantee.
 

BmacIL

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Thx.... also the garage guy told me if i want to go over 800 rwhp i should change to the 2018 / 2019 block because its more stable...
That information isn't correct. Big hp builds are using a sleeved gen 2 block.
 


VikingJoe

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Hello :)

next month i upgrade my car with an 2.65l supercharger.

How much power can the stock block handel ?

A guy from my garage told me that on his mustang with over 800rwhp the block begins to crack and he had to put out 3 times the complete engine to fix that.....

Is this normal or just a bad block on his car ?

He said to me i should stay at max 700 till 750 rwhp to be save.

Is this true or what are your experiences ?
All of the powers.
 

Vegas5OH

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Thx.... also the garage guy told me if i want to go over 800 rwhp i should change to the 2018 / 2019 block because its more stable...
Do that if you wanna hold less power
 

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We pushed just over 850rwhp on our S550 with zero issues. Motor was completely stock including OPG and CS and it was strictly track car, so when we drove it, it was beat on to its full potential.

 

Rjames18

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I've seen plenty cars come into the shop at LPF here in Houston making 900-1000whp and beat on everyday.
Also have seen two cars put down over 1100 on stock internals besides opg/cs. These cars are also beat to hell on the street and track.
Recommended? Not really but its up to you.
At that point its a gamble.
Can it be done? yes.
Mine made over 950whp and I usually cruise around with it on that setting. I've driven it from Houston to Dallas (3.5 hour drive) beat on it all day at a private rental running numerous 9.0 passes. Then drove it back to Houston afterwards.

Just need to find the right kit you want and a reputable tuner. LPF did all the work on my car. You can see what all that includes in my sig
 

Mod Mustang Racing

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The factory BLOCK without aftermarket sleeves will handle about 900hp with decent reliability, they can and will handle more but only for a limited time. A factory crankshaft will handle over 2000hp (turbocharged applications, supercharged applications can be significantly less due to loads placed on the end of the crankshaft). The factory rods bend/fracture somewhere between 750-1000hp but depends alot on the combination and factors.

Bottom line, if you are looking to make 800+ aftermarket shortblock such as the MMR 1500 series would be suggested

www.modularmotorsportsracing.com

Here is a great video of a MMR 2000 series engine, it features a factory crank and block with sleeves making over 2200hp.

 

Platinum_5.0

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We pushed just over 850rwhp on our S550 with zero issues. Motor was completely stock including OPG and CS and it was strictly track car, so when we drove it, it was beat on to its full potential.

The best part is the 2 stepping with the stock OPG/CS :rockon: I ran my car at 700WHP for almost a year with stock OPG/CS and no issues. Where you running the stock MT82 as well? lol
 

BigBlue

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@Mod Mustang Racing any thoughts on the oil cavitation (typewriter) tick and piston rattle for the 18+'s, regarding if in your opinion those should be considered durability concerns?
 

 
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