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Hi. I have a 1966 XR ute with a 5lt eb and aod or aode. The problem is I just keep running into all this tech stuff to get the motor running rite and any thoughts of an upgrade to tuning the efi or head and other mechanical upgrades brings a terrifying wave of tech crap. For all the wizbang tech the later motor has , 25 years after the 302 was released in the XT falcon it still has the same output. Yes it's probably 10% cleaner but a 100% more of a pain to work on, tune or modify. Those of you that love modern tech, electronics, iPhone etc won't understand why I would want to swap back to the dark side, or carbs, but life will be much easier. Anyone who knows what can and can't be removed or has some suggestions for heads cam rockers lifters, inlet manifold and carb can please put forward for us all to consider. I have been eyeing of a pair of trick flow heads. 190cc runners with 53 cc chambers. Can't seem to get the information on what sort of compression I would end up with. I have tried asking some forums to no avail. If anyone has a formula or has done something like this please feel free to let me know. This idea all started with the knowledge that my 5lt has shite heads that had to go. A Trickflow top end EFI kit was considered but after looking at more electronic and specialist tech work to get it running rite I thought I should go carb instead. And your thoughts are?

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Go the CARBIES...!!!    Just about to start on the same road. Stock heads are average, GT40 slightly better, and I've heard GT40p heads are the pick of the "cast" heads. AFR, CHI, Eddy, Trick Flow heads all flow way better, and produce more bang for your buck. (against spending 100 hours porting a cast head). Not 100% sure, on all the changes needed, @Thom is prob the goto guy here.  Reckon you need to change manifolds, timing cover, fuel pump mount, at the least. You lurking Thom...??

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Hi. I have a 1966 XR ute with a 5lt eb and aod or aode. The problem is I just keep running into all this tech stuff to get the motor running rite and any thoughts of an upgrade to tuning the efi or head and other mechanical upgrades brings a terrifying wave of tech crap. For all the wizbang tech the later motor has , 25 years after the 302 was released in the XT falcon it still has the same output. Yes it's probably 10% cleaner but a 100% more of a pain to work on, tune or modify. Those of you that love modern tech, electronics, iPhone etc won't understand why I would want to swap back to the dark side, or carbs, but life will be much easier. Anyone who knows what can and can't be removed or has some suggestions for heads cam rockers lifters, inlet manifold and carb can please put forward for us all to consider. I have been eyeing of a pair of trick flow heads. 190cc runners with 53 cc chambers. Can't seem to get the information on what sort of compression I would end up with. I have tried asking some forums to no avail. If anyone has a formula or has done something like this please feel free to let me know. This idea all started with the knowledge that my 5lt has shite heads that had to go. A Trickflow top end EFI kit was considered but after looking at more electronic and specialist tech work to get it running rite I thought I should go carb instead. And your thoughts are?
A few things to consider, converting an efi 5.0 to carb is exceptionally easy, its everything else that will give you headaches, any carb intake and non ecu controlled distributor is all you need and the engine will run like it was born that way.
Here's the list of obstacles you will have to overcome depending on how much of the 5.0 stuff you want to use

Fuel pump/ timing cover front accessories:

If you want to run a mechanical fuel pump you will have to change to an earlier timing cover with a fuel pump boss and you will have to fit a fuel pump eccentric to the cam, this will also mean you have to change to an earlier waterpump as the 5.0 ones spin the opposite direction, alternator, p/s and a/c (depending on what your using) will all have to be v belt style and brackets as the serpentine set up won't work with an early timing cover, you may have to source a different balancer depending on what pulleys you need, it is very important to a 58ounce balancer and flywheel with a roller 5.0 a balancer to suit an early 302/289/260/221 will cause massive vibrations and possibly break the crank, if you want to use the serpentine setup you will have to use an electric fuel pump

The trans you have if its from a falcon is an Australian only btr 4 speed auto and is a very different unit from the aod and aode's the us 5.0l used, these btr's are an electronic controlled auto and very difficult to set-up to run as a normal auto without using the engine ecu to talk to the trans tcu, I know shiftkits Australia make a standalone controller to suit btr's but as far as I'm aware they only have a manual shift option they can't be put into drive and shift themselves any more, c4 or c10 can be used behind the 5.0 and if you use a Cleveland c10 the holes in the flex plate are in the correct location for a Cleveland torque converter, if you use a Windsor converter you will need an aftermarket 58ounce flex plate to couple everything up (another thing to consider is the btr has a left hand starter and off the shelf headers don't clear it)

As far as the factory heads go gt40p's are the best iron head but the relocated spark plug means most off the shelf headers don't fit and stock cast iron manifolds don't fit these heads either, you don't want to use the stock 5.0 headers as they are garbage and flow worse than the cast iron manifolds early windsors had

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Excellent info, as usual, Thom. Hadn't considered the serpentine scenario, might have to consider that on my 302.
 
 
 
maybe a Holley Sniper...??  
I love the holley sniper we put on dads clevo, the only downside I've seen is they can be rather finniky with dual plane intakes
Before
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After
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Nice.  Been looking at the system, also Fitech, Edelbrock EFI. Did you plumb up a fuel tank return.??
Its semi return less, the reg is right near the tank and fuel pump and returns without going to the engine first

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16 minutes ago, Thom said:
21 minutes ago, bear351c said:
Nice.  Been looking at the system, also Fitech, Edelbrock EFI. Did you plumb up a fuel tank return.??

Its semi return less, the reg is right near the tank and fuel pump and returns without going to the engine first

 

Oh OK, I thought the Sniper had the reg on the throttle body.??

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