This is topic Stock block cracked in HALF in forum Tech Talk at Northern California Ford Owners  .


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Posted by Cm4hawks (Member # 5231) on :
 
This is from a buddys shop of mine in texas this is a stock block with turbo made too much power and cracked completely in half http://www.murillomotorsports.com/Coolstuff.htmf chack it out
 
Posted by Cm4hawks (Member # 5231) on :
 
sorry try this one http://www.murillomotorsports.com/Coolstuff.htm
 
Posted by 1fast281 (Member # 4670) on :
 
[Eek!] You never see a modular engine block crack in half.
 
Posted by mustanggt5091 (Member # 444) on :
 
that happpens on 500+rwhp cars with a stock block
 
Posted by Cm4hawks (Member # 5231) on :
 
yeah mike told me they hit 617 one time with it also
 
Posted by AJBlackGT (Member # 3936) on :
 
Yeah anything over 500rwhp on a stock 5.0l block and its on borrowed time.
Now if you start with a 351 block, it will make much more than that before it even thinks about breaking... [Big Grin]
 
Posted by 66 AC COBRA (Member # 904) on :
 
quote:
Originally posted by 1fast281:
[Eek!] You never see a modular engine block crack in half.
there are also not a whole lot of lincolns with even close to that much power [Roll Eyes] [Roll Eyes]
 
Posted by BlowN67 (Member # 4229) on :
 
quote:
Originally posted by AJBlackGT:
Yeah anything over 500rwhp on a stock 5.0l block and its on borrowed time.
Now if you start with a 351 block, it will make much more than that before it even thinks about breaking... [Big Grin]
whats the power b4 351w stock 69/70 block crack? the block itself with good components inside...thanx
 
Posted by AJBlackGT (Member # 3936) on :
 
I've never seen a cracked one...
But from what i've heard they're good to 800-900rwhp or more
 
Posted by BlowN67 (Member # 4229) on :
 
quote:
Originally posted by AJBlackGT:
I've never seen a cracked one...
But from what i've heard they're good to 800-900rwhp or more
whoo hoo then i have no worries then, hope it will hold, or will find a new lower rating lol
 
Posted by jayl (Member # 185) on :
 
quote:
Originally posted by 1fast281:
[Eek!] You never see a modular engine block crack in half.
talk about a hard-on for a mod motor.....jesus....
 
Posted by 1fast281 (Member # 4670) on :
 
quote:
Originally posted by 66 AC COBRA:
quote:
Originally posted by 1fast281:
[Eek!] You never see a modular engine block crack in half.
there are also not a whole lot of lincolns with even close to that much power [Roll Eyes] [Roll Eyes]
There are plenty of Mark VIII swapped engines put into fox bodies and other cars which well over 500rwhp not. Are you trying to say it is easier to make 500rwhp+ with a 5.0 engine than a 4.6 dohc? All you need is a blower on the 500rwhp stock internals.
 
Posted by HungryHippo (Member # 537) on :
 
then you have bent rods instead of a cracked block
 
Posted by JohnB (Member # 969) on :
 
I wouldn't say "plenty", there's a few. The 5.0's outnumber them plenty.
You said "Modular", not 4.6 DOHC. A 4.6 SOHC/DOHC would have a tough time w/o something breaking, especially the early model ones when comparing stock vs. stock.
 
Posted by 91 5.0 (Member # 1527) on :
 
quote:
Originally posted by 1fast281:
[Eek!] You never see a modular engine block crack in half.
I may be wrong, but that looks like a pushrod motor, not a modular. Am i missing something?? [Confused]
 
Posted by 66 AC COBRA (Member # 904) on :
 
quote:
Originally posted by 91 5.0:
quote:
Originally posted by 1fast281:
[Eek!] You never see a modular engine block crack in half.
I may be wrong, but that looks like a pushrod motor, not a modular. Am i missing something?? [Confused]
hes is saying that modualrs are better than pushrod motors stregth wise, and the modualr blocks are very strong, stronger than a pushrod motor

but I just dont really care because he is proud to drive a stinkin lincoln with a detuned 4 valve motor, it was a pathetic jab at an older motor that he cant not touch when on the streets [Roll Eyes]
 
Posted by 66 AC COBRA (Member # 904) on :
 
quote:
Originally posted by 1fast281:
quote:
Originally posted by 66 AC COBRA:
quote:
Originally posted by 1fast281:
[Eek!] You never see a modular engine block crack in half.
there are also not a whole lot of lincolns with even close to that much power [Roll Eyes] [Roll Eyes]
There are plenty of Mark VIII swapped engines put into fox bodies and other cars which well over 500rwhp not. Are you trying to say it is easier to make 500rwhp+ with a 5.0 engine than a 4.6 dohc? All you need is a blower on the 500rwhp stock internals.
ok then, put a blower on your motor, make your 500rwhp and then when it blows up let me know how it went
 
Posted by 1fast281 (Member # 4670) on :
 
That is true the stock rods and pistons don't hold up well after 400rwhp on the 4.6 dohc but it is cheaper to replace those than to buy a racing Dart or Ford Racing block, cam and valvetrain, and new heads in order to make the same horsepower. Anyways, I never meant to make this thread into a modular vs pushrod debate, I was just pointing out that Ford has been building better blocks in recent V8 engines.

[ May 02, 2005, 10:16 AM: Message edited by: 1fast281 ]
 
Posted by JoeT (Member # 298) on :
 
quote:
Originally posted by AJBlackGT:

Now if you start with a 351 block, it will make much more than that before it even thinks about breaking... [Big Grin]
not really, a C code 351w ('69) block is the same as a motorsports A351w block (basically) and is rated at what? 650 HP. That's not a lot more than the 500 to the wheels that even the late model thin-wall hyd-roller 302 blocks get.

maybe another 100 rwhp safely but that's about it. And I'd say less than that if your nabbing a late model hydraulic 351w block.

Anyways FRPP is conservative, but still I'd say about 650 rwhp is about it for the C code 351w or the motorsport A351w.

JMHO and going completely off of memory.

Granted another 100 rwhp is probably at least another half second in ET at these power levels so that's pretty decent. Say the difference from a high 9 to a mid 10 in a typical car.
 
Posted by onesicklx (Member # 285) on :
 
maybe its just me but why do 380-400rwhp fox bodie stangs run better times or about the same than 500rwhp 4.6?...the exeption are 03-04 cobras...
 
Posted by jayl (Member # 185) on :
 
quote:
Originally posted by onesicklx:
maybe its just me but why do 380-400rwhp fox bodie stangs run better times or about the same than 500rwhp 4.6?...the exeption are 03-04 cobras...
i see the same thing over and over!! ive seen s-trim cobras with 495rwhp run low 12s @ 115 while my buddies 04 cobra w/ 438rwhp runs a consistant 11.90@ 119 mph.......tq of the roots blower i guess to maintain the power. It sure seems like the mod's need a lot more help in areas of gear/tire to properly use the upper rpm power they create. just my opinion
 
Posted by onesicklx (Member # 285) on :
 
maybe peek horsepower is not all that, a nice curve is what you want... [Confused]
 
Posted by 1fast281 (Member # 4670) on :
 
quote:
Originally posted by onesicklx:
maybe its just me but why do 380-400rwhp fox bodie stangs run better times or about the same than 500rwhp 4.6?...the exeption are 03-04 cobras...
Fox bodies are lighter and are better setup for drag racing. A lot of modular engines are being swapped into fox bodies these days. Check out modularfox.com for some ideas.
 
Posted by -NORCALCOBRA- (Member # 2383) on :
 
Nobody in northern cali has stepped up imo. with a nice 4v serious street strip car the one that we do are r&d on for cylinder heads and intake manifolds has gone 11.31 @ 120 with only 326 rwhp..Yeah the mod block is good from the factory but what happens when you toss a stock rods and have to replace your heads 32 valves 32 springs 32 seals and so on its not cheap ..I can regretfully say I will has 16-20000 in my motor when all said and done...Well if I didnt do all the work myself that is.. [patriot]
 
Posted by onesicklx (Member # 285) on :
 
quote:
Originally posted by 1fast281:
quote:
Originally posted by onesicklx:
maybe its just me but why do 380-400rwhp fox bodie stangs run better times or about the same than 500rwhp 4.6?...the exeption are 03-04 cobras...
Fox bodies are lighter and are better setup for drag racing. A lot of modular engines are being swapped into fox bodies these days. Check out modularfox.com for some ideas.
i kinda agree with you, but i think theres more to it than weight...dont 4.6 mustangs share the same chassis and stock style suspention as the fox body mustang...i think the 05 mustangs was the first year they went to a new design...maybe im wrong... [Confused]
 
Posted by JohnB (Member # 969) on :
 
Nope, you're right. They (the 94+s) are heavier by a lil bit, not much.
 




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