need some help with 351w efi performance mods
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
No. But if you'll compare the ports between the two, you'll see that the GT40 ports aren't much difference in size. I don't know how they compare as to flow but I'd be surprised if they're that much different
Elder User
Joined: Nov 2009
Posts: 666
Likes: 0
From: Chicago area
The ports on the GT40 or the GT40P are just a bit bigger then the E7 heads that is the most common head on 5.0 & 5.8 built in the late 80's thru the end of production of the Winsor SB. Any intake intended for a 5.8 will fit. In fact if you went with the GT40Y or X aluminum heads you would still not have a problem with port mismatch.
A head with bigger port size is not a problem when used with a smaller intake, it's when you go the other way that you have to do some port matching. Putting a Lighting intake on a E7 or E6 head would require you to do some port matching to gain the most benefit from such a swap.
A head with bigger port size is not a problem when used with a smaller intake, it's when you go the other way that you have to do some port matching. Putting a Lighting intake on a E7 or E6 head would require you to do some port matching to gain the most benefit from such a swap.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
The ports on the GT40 or the GT40P are just a bit bigger then the E7 heads that is the most common head on 5.0 & 5.8 built in the late 80's thru the end of production of the Winsor SB. Any intake intended for a 5.8 will fit. In fact if you went with the GT40Y or X aluminum heads you would still not have a problem with port mismatch.
A head with bigger port size is not a problem when used with a smaller intake, it's when you go the other way that you have to do some port matching. Putting a Lighting intake on a E7 or E6 head would require you to do some port matching to gain the most benefit from such a swap.
A head with bigger port size is not a problem when used with a smaller intake, it's when you go the other way that you have to do some port matching. Putting a Lighting intake on a E7 or E6 head would require you to do some port matching to gain the most benefit from such a swap.
Laughing Gas
Joined: Dec 2012
Posts: 801
Likes: 7
From: Toledo, Ohio
. Are you intentionally planning a rock crawler engine that works well way down in the 1200 - 3500 RPMs range? Or more of a performance engine?
. For a truck, for 1000 - 6000 RPMs, suggest something like a 214/224 durations cam (ask for 351W firing order) like a Lunati VooDoo cam:
http://www.ebay.com/itm/Lunati-Ford-Cam-Lifter-Kit-472-496-280-290-302-351w-CamShaft-Bare-Bones-/141463548060?pt=Motors_Car_Truck_Parts_Accessories&hash=item20efe2709c&vxp=mtr
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