Modifying the upper intake
FTE Legend
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From: Ottawa, Ontario
Yes.. and when you fix the 2 biggest offenders in this list the results are outstanding. The 5.0 in my truck right now is producing over 280hp with nothing but a cam and exhaust. That's through the stock heads, stock intake, stock TB, stock airbox, and stock paper filter. My 5.8 motor did about the same with an upgraded cam and the same exhaust, so that just shows the 5.8 intake.. though smaller than the 5.0 version is plenty big enough for the stock heads.
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Junior User
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I wonder if the Cobra intake out flows the truck intake. Ive never seen them personally side by side. I wouldnt think so just because the Cobra intake does the same thing the HO inake does. right after it goes through the throttle body it has to snake past those two indentions for the bolts. Where as he truck really doesnt have any major restrictions in the intake.
FTE Legend
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From: Ottawa, Ontario
I'd say the truck uppers would easily outflow any of the car intakes including the Explorer/GT40, they have a larger TB opening and only a 90deg turn into the runners versus the pinched intake tract and a 180 turn into the runners. The Eddy Performer/Typhoon upper improves the car design by removing the pinch area behind the TB, and it also uses a taller lower with straighter, more balanced runners. There is often 30-50cfm difference in flow between the best and worst runners on a stock car lower, that applies to the HO and GT40 designs.
FTE Chapter Leader
Joined: May 2006
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From: Central Mississippi
Paul I've been following the "E-Van Intake" thread & have often wished that someone would take a burette & measure the volume of the lower runners at least of the various types of stock intakes. Hacking off the uppers to do the top runners would be too much to wish for. Do you still have or have access to those examples you posted?
That Typhoon looks great & the way it stands up & side TB is what works for me. the way the stock plenum lays over (needs bracing), covers the VC & that vertical linkage/TPS position on the TB drives me nuts.
That Typhoon looks great & the way it stands up & side TB is what works for me. the way the stock plenum lays over (needs bracing), covers the VC & that vertical linkage/TPS position on the TB drives me nuts.
FTE Chapter Leader
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From: Central Mississippi
Those would be great. In descending order: after that 5.0 truck, explorer, HO, whatever you can if you happen to run across one. Be a nice peice of info to have here on the boards for future discussions.
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Junior User
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I wonder then why the 5.8 lightning got a gt40 intake? I think Ford should have made a wider lower similar to the 5.0 truck intake. It would out flow the tubular one and the same upper could be used. Things that make you go "what the heck"
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Posting Guru
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From: I live in Leitchfield, KY
Yes.. and when you fix the 2 biggest offenders in this list the results are outstanding. The 5.0 in my truck right now is producing over 280hp with nothing but a cam and exhaust. That's through the stock heads, stock intake, stock TB, stock airbox, and stock paper filter. My 5.8 motor did about the same with an upgraded cam and the same exhaust, so that just shows the 5.8 intake.. though smaller than the 5.0 version is plenty big enough for the stock heads.
Thanks man
FTE Legend
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From: Ottawa, Ontario
No.. not even close, that's why I bought the Typhoon. If you have a mass air motor there are quite a few cams you could use, with SD it's a bit more limited but you can still get big gains. The Comp Cams XE series are good choices, you'll find similar grinds from all the other makers as well. Something with about 1/2" lift and between 255-275 duration will do the trick and not require any modifications to the bottom end.
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Junior User
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A spacer is the first thing that came to my mind.
I tried looking around online for a set of 5.0L lower intake to 5.8 cylinder head spacers and came up with goose egg. But, if you really want to tackle this my suggestion would be to take a 5.0 intake and mach it up to a 5.8. obviously it wont fit as the heads are farther appart. Slightly raise the intake manifold up to the spot where it needs to sit. measure the gap on both sides and also the front and back where those pieces of cork usually go. Then talk to a local machine shop and see if they can make some spacers for you. Who knows, you could have them make you 20 sets. Then you could sell them a little highr and make the money back.
I tried looking around online for a set of 5.0L lower intake to 5.8 cylinder head spacers and came up with goose egg. But, if you really want to tackle this my suggestion would be to take a 5.0 intake and mach it up to a 5.8. obviously it wont fit as the heads are farther appart. Slightly raise the intake manifold up to the spot where it needs to sit. measure the gap on both sides and also the front and back where those pieces of cork usually go. Then talk to a local machine shop and see if they can make some spacers for you. Who knows, you could have them make you 20 sets. Then you could sell them a little highr and make the money back.
Posting Guru
Joined: Jul 2007
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From: I live in Leitchfield, KY
A spacer is the first thing that came to my mind.
I tried looking around online for a set of 5.0L lower intake to 5.8 cylinder head spacers and came up with goose egg. But, if you really want to tackle this my suggestion would be to take a 5.0 intake and mach it up to a 5.8. obviously it wont fit as the heads are farther appart. Slightly raise the intake manifold up to the spot where it needs to sit. measure the gap on both sides and also the front and back where those pieces of cork usually go. Then talk to a local machine shop and see if they can make some spacers for you. Who knows, you could have them make you 20 sets. Then you could sell them a little highr and make the money back.
I tried looking around online for a set of 5.0L lower intake to 5.8 cylinder head spacers and came up with goose egg. But, if you really want to tackle this my suggestion would be to take a 5.0 intake and mach it up to a 5.8. obviously it wont fit as the heads are farther appart. Slightly raise the intake manifold up to the spot where it needs to sit. measure the gap on both sides and also the front and back where those pieces of cork usually go. Then talk to a local machine shop and see if they can make some spacers for you. Who knows, you could have them make you 20 sets. Then you could sell them a little highr and make the money back.
There's a place in IN that makes all kinds of intake adaptors. I looked into that when I was considering running a 351W with 5.0 Mustang GT EFI stuff. I forgot the place's name and stuff, but they make the very thing you described, but it's about $300 for just the adaptor. They even make one that mates a 429-460 Ford intake to a 500 Cadilac engine.
Basicly I wanted to see what could be done to mine for the least amount of money and effort, as its bone stock for now.
Conanski, what do you recommend for exhaust? I have a set of shorty Lightning headers, should I make true duals and use them?
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From: Central Mississippi
I had started looking for the place before. It has been posted here a few times. Found it & bookmarked.
Price Motorsport
Might go this route if a used set-up fall into my lap for extra cheap.
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Junior User
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I wanted to run the Flowtech long tube headers because they are so cheap. But ive been hearing about peoples problems with them. Like the primaries are too long and it sets the collector too low.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
The Lightning got the GT40 intake because there was a 5.8 lower available, the lower portion probably works a little better than the stock truck lower, but would still be restrictive with better heads. Finding one now is difficult and expensive, I believe they are out of production so you'll only find it used.
As stated both shorties and longtubes will fit these trucks, but there's no way to cleanly run balanced duals with the front gas tank where it is, and that's the only way duals have any peformance benefit over a single. The 4x4 models further complicate things with the x-fer case and front driveshaft leaving room for pipe only on the drivers side.. no cats will fit here.
As stated both shorties and longtubes will fit these trucks, but there's no way to cleanly run balanced duals with the front gas tank where it is, and that's the only way duals have any peformance benefit over a single. The 4x4 models further complicate things with the x-fer case and front driveshaft leaving room for pipe only on the drivers side.. no cats will fit here.