sorry for asking...... how much boost can a stock 5.0 block handle? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 17 Old 07-03-2007, 12:49 AM Thread Starter
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sorry for asking...... how much boost can a stock 5.0 block handle?

ive searched everywhere and cant find the answere.


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post #2 of 17 Old 07-03-2007, 01:10 AM
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25lbs

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post #3 of 17 Old 07-03-2007, 07:12 AM
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It is not a question of boost, it is horsepower and tune. There are many factors that go into the equation. There is no simple answer. Better to ask a different question like: How much hp do I want to make? Then what do I need to make that? If your setup is not reving over 5500-6000 you will likely have a longer life. The rule of thumb is somewhere around 450 to 500 hp you start to enter a danger zone of blocks cracking. However, there are many examples of higher hp where things are fine (see Moovs for example). Most likely thing to happen is to blow headgaskets on 302s. Gotta have a good tune.
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post #4 of 17 Old 07-03-2007, 11:11 AM
 
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It's about these things.......1) tune i.e. timing & fuel 2) How well is the balance on the rotating assembly? 3) Keep the rpm's under 6K.....
A main girdle helps a bunch too....
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post #5 of 17 Old 07-03-2007, 01:35 PM
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Also, as a rule of thumb its hard to exceed 15psi on pump gas
with out building from the ground up for it.

Yes, you hear lots of Cobra guys running more, but they are
also breaking shyt too.

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post #6 of 17 Old 07-03-2007, 02:01 PM Thread Starter
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i want at least 600whp. and i want to do it right i just want to know wether its worth building a badass shortblock to handle boost and hp. from a stock block. i was thinking about just going with a shortblock from like D.S.S racing whiich ive heard that they use stock ford blocks. or CHP performance. what do you guys think.

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post #7 of 17 Old 07-03-2007, 02:06 PM
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If you want 600 and have the cash go with a one of the new Boss blocks, Dart or manowar. All will allow room to grow from the 600 plus you can get thicker headstuds etc with way more block strength.
Erich

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post #8 of 17 Old 07-03-2007, 02:18 PM Thread Starter
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i would one of those dss shortblocks hold up? with the right tune and every precaution takin nessacery? btw i run a carb if that mattered

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post #9 of 17 Old 07-03-2007, 02:20 PM
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+1 get a Dart block for that kinda power if you want it to last
with no worries

600rwhp = 700-800hp engine, stock block no matter how good
the internals will be suspect.

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post #10 of 17 Old 07-03-2007, 02:22 PM
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Quote:
Originally Posted by eleanorfox View Post
i would one of those dss shortblocks hold up? with the right tune and every precaution takin nessacery? btw i run a carb if that mattered
I have a friend making 790rwhp on DSS stock "pro" build up 347
but its going to break, ....... sooner or later.

DSS shortblocks are just stock blocks, stud girdles do NOT strengthen
block they just help with crank walk at high rpms

If you want it to last you're going to have to invest in a DSS XR block


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post #12 of 17 Old 07-04-2007, 02:42 AM Thread Starter
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i did search but i dont think i searcged the right words cuz those didnt show up thanks a lot though

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post #13 of 17 Old 07-04-2007, 03:54 AM
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You could always use a 351 block. good for 600+

2003 GT, Vortech, LT's, etc
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post #14 of 17 Old 07-04-2007, 09:02 AM
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If your goal is 600rwhp then I would start with a different block, If your goal was 500rwhp then I would stay with the stock one.
I know DSS does all the best machining techniqes but under it all it's still a thin wall stock block.
I don't think girdles help that much, rpms and tune are the factors I believe.
JMO

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post #15 of 17 Old 07-04-2007, 09:46 AM
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What do you guys consider to be a safe tune? Is it just zero detonation?
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post #16 of 17 Old 07-04-2007, 11:30 AM
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5500 rpm max and 0 detonation helps.
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post #17 of 17 Old 07-04-2007, 02:44 PM
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zero det. and a safe a/f ratio, 12:1 or under.

89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
579.2rwhp 658.6rwtq,[email protected] kicked off track
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