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19-05-2007, 07:00 PM
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au1xlsv8
Join Date: Apr 2007
Location: NT
Posts: 695
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probably a stupid question, but is it not a good thing to use the standard 5tlr efi manifold wen the engine worked? cheers
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au1 xls tarmac rally ute, soon to be 8tb manifold, efi, alloy headed **363ci** windsor, REBUILT, dart sportsman block and big solid roller cam EDITED |
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19-05-2007, 11:03 PM
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not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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yep, no worries at all. if you feel like spending money though, edelbrock and trickflow make manifolds to suit.
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2024 F150 XLT
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20-05-2007, 10:28 AM
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au1xlsv8
Join Date: Apr 2007
Location: NT
Posts: 695
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cheers mate
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au1 xls tarmac rally ute, soon to be 8tb manifold, efi, alloy headed **363ci** windsor, REBUILT, dart sportsman block and big solid roller cam EDITED |
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20-05-2007, 10:38 AM
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Back on the road
Join Date: Dec 2004
Location: Wollongong, NSW
Posts: 3,205
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depends on what you mean by "worked"...what heads, what cam, and what rpm are you shifting/redlining?
the std intake can support some pretty decent power, but ultimately the long runners hold it back at very high rpm. the lower needs to be ported to flow as much as the upper, they can flow up to 250cfm with a ported lower (and about ~200cfm stock). runner length will hurt power above 6000rpm
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------------------------------------------------------------------------- AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute 5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor. Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash. |
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20-05-2007, 01:42 PM
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#5 | ||
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au1xlsv8
Join Date: Apr 2007
Location: NT
Posts: 695
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so i can get work done to the stock manifold??
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au1 xls tarmac rally ute, soon to be 8tb manifold, efi, alloy headed **363ci** windsor, REBUILT, dart sportsman block and big solid roller cam EDITED |
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20-05-2007, 01:54 PM
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#6 | ||
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Back on the road
Join Date: Dec 2004
Location: Wollongong, NSW
Posts: 3,205
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Yep. The lower intake manifold has runners that taper down in size to be much smaller than even the std GT40P intake ports.
The lower can be ported to allow it to support much better flowing cylinder heads (up to 250cfm). The only thing that is not so easy to modify is the runner length, so it is not suitable for a combo that wants to make peak power at very high rpm (6000rpm+).
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------------------------------------------------------------------------- AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute 5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor. Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash. |
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20-05-2007, 02:01 PM
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#7 | ||
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au1xlsv8
Join Date: Apr 2007
Location: NT
Posts: 695
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what would u suggest for decked heads and a fairly big cam??
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au1 xls tarmac rally ute, soon to be 8tb manifold, efi, alloy headed **363ci** windsor, REBUILT, dart sportsman block and big solid roller cam EDITED |
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20-05-2007, 02:19 PM
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#8 | ||
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Back on the road
Join Date: Dec 2004
Location: Wollongong, NSW
Posts: 3,205
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depends on which heads are being "decked" and how "fairly big" the cam is ;)
If you are keeping the std GT40P heads (without any porting), then I would keep the std Explorer intake and not even bother porting the lower...
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------------------------------------------------------------------------- AU XR8 Ute 13.90 @ 100mph - http://www.aufalcon.com/xr8ute 5L Windsor, GT40X heads, Crane 2030, Pacey 4-1s, Lukey 3", 3.91:1, auto. Tuned by me w/Quarterhorse and BinaryEditor. Coming Soon: Ported lower intake, Tickford "Premium" Brakes, and a good wash. |
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20-05-2007, 02:38 PM
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#9 | ||
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au1xlsv8
Join Date: Apr 2007
Location: NT
Posts: 695
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yeh we will see, i havent even spoken to the engine builder down south yet, you might know, how much do u rekon it would cost for head work (new heads i guess) big cam and kit and forged pistons and rings? jus a rough estimate....
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au1 xls tarmac rally ute, soon to be 8tb manifold, efi, alloy headed **363ci** windsor, REBUILT, dart sportsman block and big solid roller cam EDITED |
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20-05-2007, 05:05 PM
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#10 | ||
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Banned
 
Join Date: Dec 2004
Posts: 8,303
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how long is a piece of string?
Check out the Windsor section http://fordforums.com.au/forumdisplay.php?f=11 for a heap of info on heads, manifolds, cams, etc... |
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04-06-2007, 07:47 AM
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Regular Member
Join Date: Mar 2007
Posts: 66
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what i want to know with ported edelbrock lower, and ported GT40Ps with larger valved etc and a standard au220cam, would i be better running the edelbrock upper ported to 75MM for a 75MM TB or would porting the factory manifold to 75MM and to Match the Lower be just as good
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04-06-2007, 03:12 PM
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#12 | |||
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SS Grunt
Join Date: Oct 2005
Location: Melbourne-DEER PARK
Posts: 1,091
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Quote:
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The Beast has gone to a new home Morpheous VE SS 6LTR 6speed Manual in its place, Leather, Lowered, 20's, Ramjet OTR and Dual 3inch, 280RWKW I will also enter any part of the Forum I wish to enter.  :
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04-06-2007, 10:40 PM
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#13 | ||
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Young !@#$ Head
Join Date: Feb 2007
Location: Gold Coast
Posts: 796
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I agree with Neisha. I ported my lower and my standard gt4op heads and it made a huge differance to the low down torque and hi rev power. 70mm TB is more than enough unless your running a big stroker or forced induction.
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intake manifold?
Linear Mode
