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Old Mar 24, 2017 | 08:15 AM
  #1  
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Performance engine internals

I've been contacting a few shops that sell Ford internals and every shop I ask says we don't carry anything for the 6.8, reading up on a couple Ford racing journals they all say the 6.8 is a 5.4 with two extra cylinders both have exact same internals and specs. My question is does performance 5.4 rods/pistons ect fit when bought in increments of 10? Wouldn't see why not, but why would some of the best shops not bother to look it up? Somebody out there did some swapping of these right? Lol​​​

​​​looking to have my engine completely rebuilt this year and looking for some info.

Thanks guys

​​​​​​​Alex
 
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Old Mar 24, 2017 | 12:44 PM
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Yes, 5.4L modular pistons and rods fit the 6.8L V10.

2V and 4V oil pumps are the same too. A 2v 5.4, 4.6 and 6.8 oil pump are interchangable.

Cranks, heads, and manifolds are not for obvious reasons.
 
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Old Mar 24, 2017 | 06:01 PM
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Ok I thought that was the case, called and emailed a couple reputable Ford parts shops that specialize in mustangs one I heard about on here yesterday and they denied the 5.4 parts would fit and didn't take me seriously. Then one wrote me back and said it was more the fact he couldn't order them in sets of ten but this was right after telling me they wouldn't work.......Good times

Anyhow looks like I will have to find a manufacturer​ that makes the parts themselves and see if I can get ten of a couple things. Any recommendations on where to ask? Any specific pistons/rods/valves someone has actually used before?
 
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Old Mar 24, 2017 | 09:30 PM
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Originally Posted by SatinBlack03
Ok I thought that was the case, called and emailed a couple reputable Ford parts shops that specialize in mustangs one I heard about on here yesterday and they denied the 5.4 parts would fit and didn't take me seriously. Then one wrote me back and said it was more the fact he couldn't order them in sets of ten but this was right after telling me they wouldn't work.......Good times

Anyhow looks like I will have to find a manufacturer​ that makes the parts themselves and see if I can get ten of a couple things. Any recommendations on where to ask? Any specific pistons/rods/valves someone has actually used before?
bro-hime: the answer to your question is No.

I've been on this forum for about four years now and you are literally the first guy I've seen asking about upgraded engine internals.

Theres always a chance that I missed something, but there's a much bigger chance that I'm correct. The guy Krewat has been here forever, and maybe he knows something. Check with him.

The rest of of us will learn from your (forthcoming) experience.

What is your reason for upgrading? More strength/reliability/longevity or more power are the only two reasons I can foresee.

1. strength/reliability/longevity are already very very good with these engines, regarding internals.

2. More power is do-able, but results are pretty limited. These stock V10's have over 400ftlb of torque: are you shooting for 500? 600? If so, why? I love a hot rod as much (more) than anyone else, but dude-man...


I don't mean to talk you out of it, but I'm sure curious what is your end game? I truly fear that you'll get fancy rods and pistons and exotic bearings and rings... and then reassemble it $5,000 later and be disappointed because it'll feel like a stock truck. pistons and rods and valves don't make you faster unles your old parts were somehow choking you down.

I would love to hear your specific plans for a successful, productive engine build. Truly, you'd be a superhero on this forum.
 
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Old Mar 24, 2017 | 11:21 PM
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Dude lol Broheim is one of my favorite words, still call my little brother that all the time.

​​​​​Well I'm not going to be super hopeful here parts wise but would really like to know or hear it from someone who has tried it or knows with 100% certainly.

I love this truck and see myself driving​ it for along time, always have modded every car/truck I've owned, maybe I watch too many performance car shows

but it's always in the back of my mind how I can get alittle more power, I do want to drag race it and obviously reliability is something I want to keep going this truck runs very strong. I've already put quite a bit on money into it so a bit more to me will just help me enjoy it even more, last year rebuild the 4r100 with beefier parts an shift kit, Doug Thorley header's, 5 star tuner, BBK 65mm TB, also got black wheels and racing seats but haven't installed them yet. Also want to take off 400-500 lbs for some extra umph, fiberglass cowl hood and might even look into custom suspension work at some point. Have custom OEM graded 2 1/2 lowering springs made by Dever springs out here in Orange Country.

​​I dont know why but with so many interchangable parts on all these early 2000's Ford's I just can't see some special parts just made specifically for this big ol heavy engine. Something's got to work right? Lol if all goes to crap I'll start looking for a used super charger and get custom cams made and call it a day. Power wise I'd like to see this engine make 450-500 how & 650-700 torque. I have a buddy with a Dodge Ram with one of the earlier Hemis when they brought those back and I can take him out, the factory limited slip is pretty cool and I can do pretty sweet burnouts. Here's a pic how the truck looks right now. You guys have a great night.
03
 
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Old Mar 24, 2017 | 11:30 PM
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V10 conversion

I have a v10 in a 2006 f350. I'm restoring a 1972 f100 and would love to use this v10. Does anyone know of a conversion to carb and distributor for this motor? Would like to disregard the computer stuff!!
 
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Old Mar 24, 2017 | 11:31 PM
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The places you contacted probably just are not familiar with the V10 so they err on the side of caution and tell you no. A lot of 5.4l work on the V10 except for some of the obvious ones like the camshaft, crankshaft etc.

Contact the OP in the thread below. He has aftermarket forged rods and pistons if memory serves me right.
https://www.ford-trucks.com/forums/1...-f-100xxl.html

Originally Posted by 67336f100
I have a v10 in a 2006 f350. I'm restoring a 1972 f100 and would love to use this v10. Does anyone know of a conversion to carb and distributor for this motor? Would like to disregard the computer stuff!!
There are parts available for the 4.6l and 5.4l to run carburetors and aftermarket ignition. Would have to be electronic ignition, don't know where you would put a distributor. Never saw a carbureted V10 intake manifold. You would likely have to fab one up or graft together two 5.4l carbed intake manifolds. You'd be better off with a 2V V10 IMO, little more simple.
 
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Old Mar 24, 2017 | 11:32 PM
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V10 cont....

And....will the c6 bolt up to this motor?
 
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Old Mar 24, 2017 | 11:43 PM
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I believe an adapter exists for a modular to a C4. Never saw or heard of one for a C6 though.

Modular to GM automatic. Ford modular motor to Chev trans kit
 
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Old Mar 25, 2017 | 12:02 AM
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Originally Posted by dkf
I believe an adapter exists for a modular to a C4. Never saw or heard of one for a C6 though.

Modular to GM automatic. Ford modular motor to Chev trans kit
Originally Posted by dkf
The places you contacted probably just are not familiar with the V10 so they err on the side of caution and tell you no. A lot of 5.4l work on the V10 except for some of the obvious ones like the camshaft, crankshaft etc.

Contact the OP in the thread below. He has aftermarket forged rods and pistons if memory serves me right.
https://www.ford-trucks.com/forums/1...-f-100xxl.html



There are parts available for the 4.6l and 5.4l to run carburetors and aftermarket ignition. Would have to be electronic ignition, don't know where you would put a distributor. Never saw a carbureted V10 intake manifold. You would likely have to fab one up or graft together two 5.4l carbed intake manifolds. You'd be better off with a 2V V10 IMO, little more simple.
Sounds like it would be cheaper and easier to just run a 5.0l I just liked the idea of using the v10 if the parts were available. I've never been into a v10 before so probably better stick inside my comfort zone.
 
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Old Mar 25, 2017 | 09:50 AM
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Originally Posted by Im50fast
Theres always a chance that I missed something, but there's a much bigger chance that I'm correct. The guy Krewat has been here forever, and maybe he knows something. Check with him.
You have missed a lot

Pistons and rods will of course fit. You're problem seems to be getting them in a set of 10, and I'm sure the manufacturer sells singles as replacements but these shops you're talking to seem to be too lazy to go the extra length.

The one thing I'm going to tell you to worry about: Engine balance. The V10 uses a counterweight balance shaft in the driver's side head. Because of the inherent imbalance of 10 pistons rods doing their own thing at 72 degrees while the block is 90 degrees, the balancing shaft was required. I would suspect that this means your best bet is to either find some sort of machinist engine-balancing whizz who knows what they are doing and can balance a V10 - OR: When you take the engine apart, weigh each piston and rod assembly, and make sure the replacements are the exact same weights. With performance parts, that might not be a possibility.

I'm theorizing here, and we did have one guy here (I seem to recall) do the upgrades but I don't think he ever reported back.

Do some research on the replacement part's weight versus stock, even if the info is for a 5.4L
 
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