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GT40p Heads for my EB sXR8 

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 02, 2010 6:01 pm 
Getting Side Ways
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xr8m8 wrote:
if ya convert ya heads to gt40p they should

Nope, Steering rack and that gets in the way.....

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 02, 2010 6:23 pm 
Oompa Loompa
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so how do other people get gt40p heads and exploder intakes to fit past steerin racks

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 02, 2010 7:12 pm 
Getting Side Ways
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xr8m8 wrote:
so how do other people get gt40p heads and exploder intakes to fit past steerin racks

e series headers, and removing them to change plugs

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 02, 2010 7:20 pm 
Oompa Loompa
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so they do fit just need a special tool or a bit of time to change plugs

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 02, 2010 8:21 pm 
Getting Side Ways
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Some headers fit and allow easy access to the plugs, other headers fit but you need to do one or more of

- Fit 90 degree angle spark plug boots
- Fit high temp spark plug boot shields
- Fit shortie spark plugs
- Fit iridium spark plugs (you only have to change them every 160,000k's)
- Remove headers to remove some spark plugs

Well worth the effort though. The GT40P's are a good "budget" upgrade.

Other members will report what works in their vehicles. I have heard that Defilipos (not sure of spelling) are a good option but pricey.

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 02, 2010 8:26 pm 
Oompa Loompa
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no kiddin the defillipo's are expensive but good i fitted them to me new combo

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Sat Jun 05, 2010 8:23 pm 
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Ride: Ford 1991 EB S XR8 5spd

Location: Melbourne
VIC, Australia

Yeah Still Looking for GT40p`s with roller rockers, Going to get them acid bathed before i put them on, it just makes sense as im going to all the effort, Got the explorer manifold, was told to look for a cam but not sure which one to go for, im after 250rwkw, so any help is gold to me.
Cheers Boyz
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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Sat Jun 05, 2010 11:09 pm 
Getting Side Ways
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Unless its stroked ?? 250rwkw is a little high with GT40p heads..
220 is about as tractable engine wise with Crane 2031, TFS 1 cam or cam of similar specs...
Too much more aggressive with take away lower rpm power..
I would fit head studs to keep heads from lifting ..
I assume your aiming for around 10 to 1 compression ??...

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Tue Jun 08, 2010 11:03 am 
Oompa Loompa
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Ride: 98 au1 xr8

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i had a standard 98 au xr8 motor i think you guys call it the ho motor but any way was standard internals gt40p heads pacemaker extractors 90mm maf standard explorer intake standard throttle body a blower cam 42pound injectors fuel pump and the help of a vortech supercharger i got 305 rwkw (410-415rwhp)

i still have that motor sitting on a crate (block, crank, rods, pistons, cam, heads, push rods, lower mainifolds, upper mainifolds, throttle body, fly wheel, timing chain cover, oil pump. still fully assembled :?:

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Tue Jun 08, 2010 12:34 pm 
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xr8m8 wrote:
i had a standard 98 au xr8 motor i think you guys call it the ho motor but any way was standard internals gt40p heads pacemaker extractors 90mm maf standard explorer intake standard throttle body a blower cam 42pound injectors fuel pump and the help of a vortech supercharger i got 305 rwkw (410-415rwhp)

i still have that motor sitting on a crate (block, crank, rods, pistons, cam, heads, push rods, lower mainifolds, upper mainifolds, throttle body, fly wheel, timing chain cover, oil pump. still fully assembled :?:


any AU motor isnt called a 'HO' motor.
HO primarily refers to the E-Series Motors running the HO Manifolds and E7 Heads.
Originated in the US in the mustangs.

all AU motors have an advantage over the HO motor, even with the 175 motors pissy cam.

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Tue Jun 08, 2010 1:49 pm 
Oompa Loompa
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cool i'll disregard what i read in the gregors man so yeah gt40p heads should flow 400hp at the wheels

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Tue Jun 08, 2010 6:49 pm 
Getting Side Ways
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xr8m8 wrote:
cool i'll disregard what i read in the gregors man so yeah gt40p heads should flow 400hp at the wheels


Nope, not 400 rwHP without some sort of forced induction or power adder. Not even 400fwHP. A FULLY OPTIMISED engine could theoretically make 397fwHP based on the intake flow of 195cfm, but in the real world this isn't practically acheivable. If you can make 350fwHP with GT40P's you're doing really well.

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Tue Jun 08, 2010 7:21 pm 
Getting Side Ways
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Power: 205 rwkw

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Also, I think the underdrives would need to be from a 94/95 Mustang to fit our engines - after the mod, of course.

I'm pretty sure most of the 302 Mustang engines came with the E7 heads as well. There wouldn't be any point in importing "Mustang heads" as such. A lot of them were upgrading to GT40s and GT40ps as well. But now, the majority are running alloy heads as the second-hand market over there is so extensive, they can pick up second hand set for what some people are paying for GT40ps here.


edit - oops, didn't realise there were another 2 pages... :roll:

 

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Last edited by Scaffy on Wed Jun 09, 2010 11:13 am, edited 1 time in total.

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 09, 2010 2:26 am 
Oompa Loompa
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xafalcon wrote:
xr8m8 wrote:
cool i'll disregard what i read in the gregors man so yeah gt40p heads should flow 400hp at the wheels


Nope, not 400 rwHP without some sort of forced induction or power adder. Not even 400fwHP. A FULLY OPTIMISED engine could theoretically make 397fwHP based on the intake flow of 195cfm, but in the real world this isn't practically acheivable. If you can make 350fwHP with GT40P's you're doing really well.


hey bud just go back a few comments i did explain that i had a vortech v2 on to get that power out put at the wheels :D

 

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 Post subject: Re: GT40p Heads for my EB sXR8
Posted: Wed Jun 09, 2010 11:15 am 
Getting Side Ways
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xr8m8 wrote:
so they do fit just need a special tool or a bit of time to change plugs


Nope, AU headers will not fit on E-series. The special tool you'd need to make them fit is a grinder and welder.

 

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