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60 thou off head 

 

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 Post subject: 60 thou off head
Posted: Sun Mar 08, 2009 1:27 am 
Getting Side Ways
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Location: Geelong
VIC, Australia

Guys....

If a head has had 60 though its its life taken off it being thats an ef head, whats would be the comp ratio if standard is 9-3 - 9.4

Woudl it be 9.7-9.8

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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 Post subject: Re: 60 thou off head
Posted: Sun Mar 08, 2009 10:25 am 
Getting Side Ways
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Ride: AU XR6

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Quick question wouldn't you want to lower the comp for the blower? Or are you currently running a head with 60 thou off it and trying to work out where you're starting from? I know this hasn't been any help but I'm curious.

 

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 Post subject: Re: 60 thou off head
Posted: Sun Mar 08, 2009 10:29 am 
Getting Side Ways
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Location: Geelong
VIC, Australia

The blowers gone if gone back to NA setup

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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 Post subject: Re: 60 thou off head
Posted: Sun Mar 08, 2009 12:02 pm 
Getting Side Ways
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Ride: MCMXCV Falcon

Location: G town
VIC, Australia

EF/EL pistons have 8.5cc dish
head chamber volume should be around 65cc
head gasket tickness approx 1mm...

you can work out the comp ratio from this

 

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 Post subject: Re: 60 thou off head
Posted: Sun Mar 08, 2009 12:03 pm 
Getting Side Ways
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yeah i seen you had the blower up for sale not long after fitting it.... why the quick change of mind?
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 Post subject: Re: 60 thou off head
Posted: Sun Mar 08, 2009 12:19 pm 
Getting Side Ways
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Ride: MCMXCV Falcon

Location: G town
VIC, Australia

i calculate it at around 10.0:1

but be careful that it hasnt already had a fair bit taken off it....u can run into timing chain loosness issues if u go too far

 

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 Post subject: Re: 60 thou off head
Posted: Sun Mar 08, 2009 7:15 pm 
Getting Side Ways
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Location: Geelong
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Had the blower on for 3-4 months but have made plans to go overseas mid to late this year and needed the money for the ticket so since then been slowly saving to get it to a na setup with worked head and cresent stage 3 cam which is were im at now the gy i got to do the head work said the head had allready have 40 thou off in the past

And he took of another 20 so im just gestimating what the comp woudl be

 

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EL Fairmont - GT steering wheel -3.45 lsd - superlows - white line sway bars - xr kit - au11 xr8 engine - 3500 convertor -BA XR8 leather interior - ltd woodgrain - di filippo extractors - trick flow track heat manifold - tfs1 camshaft - twin 2.5 inch system venom cats hooker mufflers - 187rwk

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