1986 e100 overhaul
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From: Woodworth,LA
1986 e100 overhaul
I picked up this van on cl a few months ago and its been barely ran ever since because its just running so rough. I waS just wondering what u guys recomendation would be whether i should rebuild or get a newer efi motor. Its 4.9l with c6 with lots of ticking. Its got fuel delivery problems right now. Its got high mileage probably over 250k was wondering if these can even be rebuilt to be as reliable after being dogged like that.
Really my main question would be this if i got an efi kit and rebuilt the motor wouldnt that be less headache and make more power and better economy than a efi motor with all the emissions crap and sensors as the heads on the carbed style can be made to flow better. If i got an efi motor id probably have to rebuild it anyways.
I also wanna do a zf manual trans swap while im there so any insight on that would be helpful ive read a lot on it but never seen it finished in the threads. Ik they had manuals as an option on these older vans so i should be able to find the pedal assembly for it.
Really my main question would be this if i got an efi kit and rebuilt the motor wouldnt that be less headache and make more power and better economy than a efi motor with all the emissions crap and sensors as the heads on the carbed style can be made to flow better. If i got an efi motor id probably have to rebuild it anyways.
I also wanna do a zf manual trans swap while im there so any insight on that would be helpful ive read a lot on it but never seen it finished in the threads. Ik they had manuals as an option on these older vans so i should be able to find the pedal assembly for it.
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From: Woodworth,LA
Yea ill find some way to make it work. Im gonna try to do the efi too i would love to put mpfi in it just to see what kind of power and economy it would bring but vintage inlines pricing is insane at 2500$ for aluminum head and efi intake. I found a tbi kit for 750.
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From: South central, Minnesota
If you want a budget multiport efi set up. Just get a complete intake setup off any 87-97 4.9L. They will bolt right up to the carb head. Grab the dual exhaust manifolds at the same time. They way out flow the stock carb exhaust manifold. They are basically cast iron shorty headers. Then go with a Megasquirt or similar stand alone unit to control the efi . I don't care for tbi set ups on the 300. It's a long engine and a single tbi will always give you an uneven air/fuel distribution. So you will always have certain cylinders that run leaner/richer then the others. And going multiple tbi's is a pain and you are just better off going multi-port. I don't really like single carbs on the 240/300's either. My favorite set up is a dual carb intake with two Autolite 2100 2V carbs. It's dead simple, good even a/f distribution and runs great. The intake manifold is expensive ( $500 ) but the carbs are cheap. I'm building my own manifold for my 300.
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From: Woodworth,LA
[QUOTE=fordman75;18613735]There is no aluminum head for the 240/300/4.9L big 6's. Those aftermarket heads are for the small 6's like the 200/250 engine family.
My bad i overlooked that in my excitement.
Im kinda cramped for space in this snub nosed van so those manifolds might actually be a perfect compromise.
My end goal is just a little more power, economy and something that doesnt stumble at wot. I used to think carbs were cool as a kid and after owning a truck i had to pump the gas pedal 7 or 8 times before starting no thanks this smog era carb vehicles are such a headache because theres so many things run off vaccum any loss of it makes the vehicle run like crap.
My bad i overlooked that in my excitement.
Im kinda cramped for space in this snub nosed van so those manifolds might actually be a perfect compromise.
My end goal is just a little more power, economy and something that doesnt stumble at wot. I used to think carbs were cool as a kid and after owning a truck i had to pump the gas pedal 7 or 8 times before starting no thanks this smog era carb vehicles are such a headache because theres so many things run off vaccum any loss of it makes the vehicle run like crap.
Lead Driver
Joined: Dec 2000
Posts: 6,298
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From: South central, Minnesota
My bad i overlooked that in my excitement.
Im kinda cramped for space in this snub nosed van so those manifolds might actually be a perfect compromise.
My end goal is just a little more power, economy and something that doesnt stumble at wot. I used to think carbs were cool as a kid and after owning a truck i had to pump the gas pedal 7 or 8 times before starting no thanks this smog era carb vehicles are such a headache because theres so many things run off vaccum any loss of it makes the vehicle run like crap.
That's another reason I prefer carbs over efi. The stock efi upper intakes curves up and over the valve cover. So it has to be removed to change the valve cover gasket. I know all about the tight engine compartment. The intake manifold I'm building has real short runners to make more room for the dual carbs.
If you have to pump the gas that many times to start it you've got something wrong. I've had carbed vehicles that start just as well as any efi equipped one. I didn't even have to touch the gas pedal. Hit the key and fired right up. At the most you should only have to hit the gas pedal once before you start cranking and then turn the key and it should start no problems. If it doesn't then you need to hunt down the issue ( choke adjustment, carb tune or fuel boiling ) . A carbed set up is way simpler then any efi set up. EFI is great when it's working right. When there is a problem they are a pain.
Your van doesn't look like junk to me. It's in better shape then my 89 is.
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