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300 six in a 1998 Expedition? how crazy ?

 
Old 03-12-2019, 10:05 AM
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Default 300 six in a 1998 Expedition? how crazy ?

I participate in a lot of car forums and there is always somebody proposing a conversion that is completely unworkable and a lot of time is wasted talking that person down and they are never heard from again.

So i don't want to be that guy but I am hoping ya'll might indulge my question just for the fun of it.

I love my 91 F150 for the 300 six and i love my Expedition for everytihng else- family hauling, ride, comfort, offroad, etc.

The first Expeditions came with the E4OD transmission. So it would not be a big leap to power it with an earlier engine.

Of course it would not be as comfortable on the highway without some increas in power.

Beside that, what would be the obstacles?
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Old 03-12-2019, 10:26 AM
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I had a 1990 Bronco with the 300 (4.9L) and E4OD. The Bronco is not as heavy as the Expedition, and with only 150 HP you won't win any drag races, but I think for most normal driving it would be fine. It will definitely limit your ability to tow.
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Old 03-13-2019, 07:57 PM
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https://www.shop.cliffordperformance.net/

Bring your checkbook. If I was going to build a 6, this is where I'd go.
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Old 03-17-2019, 09:48 AM
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My question would be does the 98 E40D have the same bellhousing bolt pattern as the 91 300 six?
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Old 03-17-2019, 02:05 PM
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No. 98 E40D is only used in the modular motors and they have their own pattern 300 I6 is a SBF pattern. My question isn't the engine choice but how it will fit into the hole. With a fan on it, it would be longer than the area it would sit in. How would you put that long sob into that smaller area?
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Old 03-17-2019, 02:20 PM
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It's 4.5" longer than the 4r70w. Case anyone is curious. For the modulars anyway. Essex platform, not sure....bet it's around there. Still, like AK said....has to bolt the engine. I have no idea there.

Last edited by Jbrew; 03-17-2019 at 02:26 PM.
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Old 03-17-2019, 05:54 PM
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Take the fan off and work an electric pusher fan in front of the AC condenser/radiator? Take a torch/body saw to the firewall and mig weld new panels/tunnel shape in? Crazy has no limits, if you want it bad enough, there is always a way..
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Old 03-17-2019, 09:00 PM
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Yea I guess anything can be done, but is it practical, that's what it comes down to, and to most it's not. It's a lot harder to cross breed these generations nowadays than it used to be with all the different platforms, engines, electronics, etc.
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Old 03-18-2019, 06:16 AM
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Originally Posted by JCR 56 View Post
Yea I guess anything can be done, but is it practical, that's what it comes down to, and to most it's not. It's a lot harder to cross breed these generations nowadays than it used to be with all the different platforms, engines, electronics, etc.
I'm not really obsessed with this idea, i just want to know if it's doable if i ever run into an old expedition for a cheap price.
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Old 03-18-2019, 10:53 AM
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Probably if you found one about the same generation as your truck, but I don't know when they started making expeditions.
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