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Old May 19th, 2010, 11:34 PM   #1
Yota Bill
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Default D3VE heads and stock EFI?

rebuilding a 460 in an 88 F250 (not that I want to, but I have no choice now), all stock as far as the engine is concerned...I have another 460 sitting on a stand in the corner, that has the D3VE heads on it...will those heads bolt up to the stock EFI intake, and is it worth is to use them? Were there any changes to the block in that time span that would make the heads unusable with this block?
Not looking to build huge amounts of power, but if I can see a noticable gain with parts that I already have, then my feelings are that I might as well do it. If its more then just bolting them on, then I probably wont bother. I dont want to get into lots of aftermarket parts, reprogramming or replacing the ECM, etc. This rebuild has to be done on a low budget.

Truck has a C6, 205, approx. 9 inches of lift, and 38.5's...will see about equal use on and off road, pulling a trailer, etc...also may consider a cam swap, but again, dont want to get into ECM problems...any suggestions there? Obviously I'm more interested in low RPM torque then high RPM horsepower
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Old May 21st, 2010, 04:40 PM   #2
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nobody knows anything about the Ford 460?
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Old May 21st, 2010, 04:53 PM   #3
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sorry I've been reading other stuff. most ford 429/460 stuff is cut the same. the only real diff between the two is cranks and pistons. heads and blocks have been the same for years. I bet if you check the Ford SVO web site they have a listing for the interchange. just a question do your heads have screw in studs?
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Old May 21st, 2010, 05:18 PM   #4
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I dont know on the D3 heads, that engine is tall all togethor...

from what I havce found on this, the older heads will work with the EFI intakes after opening the ports on the head some, apparently the ports sit lower on the carbed heads...that makes the carb intakes unusable with EFI heads, though, from what I have found on the net


honestly, at this point I'm looking more for some suggestions on what cam to use that is compatible with the speed density sytem
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Old May 22nd, 2010, 03:16 AM   #5
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Quote:
Originally Posted by Yota Bill View Post
I dont know on the D3 heads, that engine is tall all togethor...

from what I havce found on this, the older heads will work with the EFI intakes after opening the ports on the head some, apparently the ports sit lower on the carbed heads...that makes the carb intakes unusable with EFI heads, though, from what I have found on the net


honestly, at this point I'm looking more for some suggestions on what cam to use that is compatible with the speed density sytem
D3's have the bolt down non adjustable rockers. The other information is correct.
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Old June 6th, 2010, 07:48 PM   #6
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The EFI 460 is completly different from the carb 460. The blocks and rotating assemblys are the same, but the heads and intake are not interchangeable.
also the exhaust ports are different, efi ports are 1/4 inch higher and different shape than the carb heads.

To be able to use a different cam with the stock speed density EFI, the cam will have to be
very close to the stock grind. The SD EFI runs off preset tables for the injectors and timing.
Without alot of dyno time and computer reprograming, the stock SD will never be able to under stand
the new input, ie cam, headers and such.
Your best bet to run efi on a 460 is
mustang efi parts 89 to 93
computer, harness, sensors etc.
and a megasquirt, or tweecer to be able to flash the computer with the new inputs,
bigger cid, more air flow, longer injector puls, firing order, etc.

Or spend $3300 on a mass-air conversion (very nice kit, but spendy)

Last edited by Brian in MI; June 6th, 2010 at 07:56 PM.
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Old June 6th, 2010, 09:55 PM   #7
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huh...and here I figured the best bet to run EFI on a 460, would be to leave the stock EFI parts on the stock 460 that came in the truck from Ford...didnt know I had to spend a bunch of money to make a stock system work


just poking a little fun, so dont get bent out of shape over it


I know I would need to swap to a MAF system, and have a PCM programmed to really do anything with the engine, and that the stock speed density sytem wont be able to make the necassary changes to the fuel maps.

from what I have found, the heads are interchangeable on the blocks, but the intakes are not backwards compatible, meaning the carb heads can be made to work with EFI intakes, but the EFI intakes will not work with the carbed heads because the port height is different enough to open the ports into the lifter valley

I have not removed the D3 heads from the other 460 that I have sitting on a stand to verify this for myself, just the info I have been able to find on the net, from several different sources

what I have decided on is this: I will do a basic rebuild on the stock 460 that originally came in the truck, and reinstall it in the truck. Later, I will build up the other 460 I have on a stand, with the D3 heads, and build my own intake to run EFI on that engine ( I have a plan for that, so just drilling holes and welding bungs into a stock intake wont work with my plans), and get all of my pieces togethor, computer, wiring, etc. When I have that engine ready to go in, I will pull everything out of this truck, including the speed density system, and install all the new hi-po stuff, and then the existing 460 with the speed density system can go into my '78 F250, which will just be my tow rig when I get it done anyway, so that system will work fine for that.
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