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max boost stock engine can take 

 

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 Post subject: max boost stock engine can take
Posted: Sun May 06, 2007 3:29 pm 
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what is the stock boost the bottem end can handle (stock bottom end)?

 

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Posted: Sun May 06, 2007 3:33 pm 
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Im pretty sure CHEF's old ED was on 14 psi on a completely stock engine.

 

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Posted: Sun May 06, 2007 3:49 pm 
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20psi+ with the right compression and good tune.

 

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Posted: Sun May 06, 2007 3:54 pm 
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fritzz wrote:
20psi+ with the right compression and good tune.



LOL
U seriouse? 20+ PSI?

 

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Posted: Sun May 06, 2007 4:02 pm 
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CHEF is mad is mad though... :?
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Posted: Sun May 06, 2007 4:07 pm 
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Pyroay wasn't comfortable running his any higher than 16psi with standard bottom end and got just over 300rwkw off that

Last edited by MoNGooSE on Sun May 06, 2007 4:08 pm, edited 1 time in total.

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Posted: Sun May 06, 2007 4:08 pm 
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fritzz wrote:
20psi+ with the right compression and good tune.


Not for long with a completely standard bottom end... And you would want a far from standard head to deal with that boost
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Posted: Sun May 06, 2007 4:18 pm 
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stevoperth (514.8 rwhp eb falcon) is running a stock bottom end IIRC
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Posted: Sun May 06, 2007 7:22 pm 
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im not saying its the ringt thing to do, but it will take it.
thats if u can get the comp low enough with stock pistons.

there is also a supercharged el xr6 here in perth that has around 440rwkw and runs 10.1's down the 1/4 witch still has the stock bottom end.

just remember that ford pistons are already high silicon cast, witch is what most of these guys are running eg tufed6 460rwkw 21psi

 

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Posted: Sun May 06, 2007 8:24 pm 
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think this is almost an impossible question to answer

by stock bottom end do you mean stock CR or are you going to decompress (cut into chambers or thick gaskets)?

how long do you want it to last for?

what sort of engine management will you have (state of tune makes a big difference).

Boost is a measure of restriction, so the more efficient your engine is (intake, head, cam, exhaust) the less boost you can safely run.

 

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