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EA head + forced induction 

 

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 Post subject: EA head + forced induction
Posted: Tue Feb 22, 2011 6:13 pm 
Stock as a Rock
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Age: 37

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Joined: 18th Aug 2005

Location: hobart
TAS, Australia

Just wondering if anyone here is having no issues using the EA head with forced induction setups ?
Just looking into extra costs ect for chucking a turbo on my car.. i came accross this article on autospeed with JMM that mentions
"Jim says the EA head should be avoided - "there are weaknesses in the casting, design faults and flow problems." The EB was slightly improved and the EBII was better again."

Does this mean i'll have a time bomb on my hands running an EA head with boost? (will be sticking to 6psi or less)
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 Post subject: Re: EA head + forced induction
Posted: Tue Feb 22, 2011 6:24 pm 
Getting Side Ways
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Location: Grafton
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Well if you plan on boosting it, you'd be dumb not to do the headgasket on it first (if it hasnt already been done).
If you do that, replace it with an AU MLS gasket, and you could source a later model head then, though you wont suffer if you use your original EA head like you are thinking.

 

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 Post subject: Re: EA head + forced induction
Posted: Tue Feb 22, 2011 8:11 pm 
Parts Gopher
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Location: nanango
QLD, Australia

the ea head does have alot of valve shrowding going on, so that would explain the less flow rate
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 Post subject: Re: EA head + forced induction
Posted: Tue Feb 22, 2011 8:16 pm 
Stock as a Rock
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Age: 37

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Joined: 18th Aug 2005

Location: hobart
TAS, Australia

Yeah will be replacing the headgasket, and getting the head machined to make sure she's nice and flat. it's the 'weakness in the casting' bit that worries me.. the last thing i want is a cracked head.
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 Post subject: Re: EA head + forced induction
Posted: Wed Feb 23, 2011 6:15 pm 
Getting Side Ways
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Age: 36

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Ride: BA XR6 Turbo

Location: Canberra
ACT, Australia

An ED head will lower the compression for you as well.

 

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 Post subject: Re: EA head + forced induction
Posted: Thu Feb 24, 2011 12:01 am 
Oompa Loompa
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Joined: 22nd Feb 2011

Location: lochiel
SA, Australia

the valve shrouding area in the chamber will cause detonation, ditch it straight away
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