efi head on carb block
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From: near reno
efi head on carb block
i had a look at a donor bronco tonite, im not sure of the year(early 90's) seems to be in good condition excluding a siezed motor from overheating. my question is this, i have a 79 block in good condition, and assuming the efi head can be restored, would casting differences prevent that head from bolting onto my block? if so, would i need to modify anything more than a block off plate for the fuel pump? thanks in advance for any input/advice
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From: Coal Region
http://fordsix.com/forum/viewtopic.php?t=10655
give it a good lookin over, really useful info there.
give it a good lookin over, really useful info there.
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From: The Big, Oregon
One thing to watch for- EFI heads do crack, especially when overheated. Aside from the unfinished fuel pump hole, the blocks are the same. For a block off plate, use one for a big block chebby. Same size and bolt pattern.
You can use the EFI head on a carbed engine for higher compression, but then you have to re-curve the distributor for the fast-burn combustion chambers. A better way to go is the 240 head.
You can use the EFI head on a carbed engine for higher compression, but then you have to re-curve the distributor for the fast-burn combustion chambers. A better way to go is the 240 head.
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I know for a fact that the EFI stuff will work on a 79 Block and head. (or at leas the 87 EFI stuff) We put a good 79 motor in our 87 Truck when the mains started knocking. All the FI stuff stayed. A couple sensors are different, so watch out for that. The oil pan/ dipstick was different, too. We had to cut the dipstick and now it reads empty. Great joke to pull at full serve gas stations... "Check the oil, please.." 
And for the "block off plate" we used the fuel pump that was on it, and looped a hose from in to out. Cheers.
And for the "block off plate" we used the fuel pump that was on it, and looped a hose from in to out. Cheers.
hey Ford_Six what do u mean exactly
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From: The Big, Oregon
Specifically, the base timing is the same, but the advance is slower. The max timing advance comes later than in the carbed engine. If you are using the whole EFI setup, you don't need to worry about it- the computer takes care of it, there is no mechanical or vacuum advance. With a carbed engine, though, you will need to play with the springs and weights to get it right, or just get a custom curved distributor.
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