Ford 7.3L gas power numbers

ShinerBock wrote:

FishOnOne wrote:


I would call it a semi closed block similar to the 6.2, but with small slots between the cylinders for coolant flow.

Link

Thanks for the video. I would consider that more of a semi-closed deck too. Most semi-closed only have support front to bottom and right to left. The 7.3L block seems to have more than that. Either way, it definitely has more structural cylinder support than the 6.2L which will go a long way in longevity and how much power it can handle.

I would not be surprised if ford does not make a blown version of this engine for smaller vehicles. The block and other internals seem well equipped to handle it.

The 6.2 is known to be a good engine so if the 7.3 will outlast it then it should be a super engine. I'm anxious to see actual tests and see what it can do.

That's weird, I can both click on link by wnjj, or directly view the photo I posted.

Anyway, the L8T makes just over 400 lb-ft @ 2000 rpm, but dips sharply down to 340 lb-ft @ 1000 rpm, in a fairly linear fashion.

The 7.3 holds on much stronger at low rev.

Whenever I click on these links, I get an "Error 101, the owner of this website does not allow hot linking".

FishOnOne wrote:

wnjj wrote:

RoyJ wrote:

Copperhead wrote:
Please repost as I am unable to open whatever graph, chart, whatever you are talking about.

Look at the post again, I've adjusted the image size.

It looks like you can’t hot link that picture. You can click here to see it: https://www.gm-trucks.com/forums/uploads/monthly_2019_06/5cffff9056848_L8TvsL96SAEHPTorque.jpg.09ecd46ae6943e11235a5d6986010343.jpg

Went from bad to worse...

Huh? Roy’s picture shows nothing but an empty frame for me. The link above shows in a full screen window so I can at least check out the graph. How is that worse?

FishOnOne wrote:


I would call it a semi closed block similar to the 6.2, but with small slots between the cylinders for coolant flow.

Link

Thanks for the video. I would consider that more of a semi-closed deck too. Most semi-closed only have support front to bottom and right to left. The 7.3L block seems to have more than that. Either way, it definitely has more structural cylinder support than the 6.2L which will go a long way in longevity and how much power it can handle.

I would not be surprised if ford does not make a blown version of this engine for smaller vehicles. The block and other internals seem well equipped to handle it.

ShinerBock wrote:

danrclem wrote:
I'm sure that Ford built this engine with reliability in mind because it's going in Super Duty trucks that are built for work. I'm sure they could have got more power out of this engine but at what cost. Would reliabilty be compromised? Would fuel economy be compromised? Just by looking at the specs it should be a joy to tow with unless you are pulling a very heavy load.

I like my 6.2 but I think the 7.3 is going to knock the socks off of it. The low rpm torque paired with a 10 speed should be a winner.

I would wager that this engine's power output is emissions limited or purposely limited to add power later. Looking at what this engine is made is made of, I don't see adding another 30-50 hp by removing much of the emissions tuning having any significant effect on longevity or fuel mileage. In fact, it may even increase fuel mileage by optimizing timing.

I have not seen pictures of the block yet to know it is open, semi-closed, or closed deck. It appears to be a closed deck from the pictures I have seen. If it is closed or even semi closed, then there is no doubt it can handle even more power with what the crank and pistons are made from. Closed deck blocks are mostly found on heavily boosted gas and diesel engines. Although most(if not all) push rod truck engines are also closed deck due to their configuration which leads to their reputation for longevity and durability. The 6.2L was closer to a semi-closed block with only the outside cylinders being closed.

I would call it a semi closed block similar to the 6.2, but with small slots between the cylinders for coolant flow.

Link

danrclem wrote:
I'm sure that Ford built this engine with reliability in mind because it's going in Super Duty trucks that are built for work. I'm sure they could have got more power out of this engine but at what cost. Would reliabilty be compromised? Would fuel economy be compromised? Just by looking at the specs it should be a joy to tow with unless you are pulling a very heavy load.

I like my 6.2 but I think the 7.3 is going to knock the socks off of it. The low rpm torque paired with a 10 speed should be a winner.

I would wager that this engine's power output is emissions limited or purposely limited to add power later. Looking at what this engine is made is made of, I don't see adding another 30-50 hp by removing much of the emissions tuning having any significant effect on longevity or fuel mileage. In fact, it may even increase fuel mileage by optimizing timing.

I have not seen pictures of the block yet to know it is open, semi-closed, or closed deck. It appears to be a closed deck from the pictures I have seen. If it is closed or even semi closed, then there is no doubt it can handle even more power with what the crank and pistons are made from. Closed deck blocks are mostly found on heavily boosted gas and diesel engines. Although most(if not all) push rod truck engines are also closed deck due to their configuration which leads to their reputation for longevity and durability. The 6.2L was closer to a semi-closed block with only the outside cylinders being closed.

wnjj wrote:

RoyJ wrote:

Copperhead wrote:
Please repost as I am unable to open whatever graph, chart, whatever you are talking about.

Look at the post again, I've adjusted the image size.

It looks like you can’t hot link that picture. You can click here to see it: https://www.gm-trucks.com/forums/uploads/monthly_2019_06/5cffff9056848_L8TvsL96SAEHPTorque.jpg.09ecd46ae6943e11235a5d6986010343.jpg

Went from bad to worse...

I'm sure that Ford built this engine with reliability in mind because it's going in Super Duty trucks that are built for work. I'm sure they could have got more power out of this engine but at what cost. Would reliabilty be compromised? Would fuel economy be compromised? Just by looking at the specs it should be a joy to tow with unless you are pulling a very heavy load.

I like my 6.2 but I think the 7.3 is going to knock the socks off of it. The low rpm torque paired with a 10 speed should be a winner.

RoyJ wrote:

Copperhead wrote:
Please repost as I am unable to open whatever graph, chart, whatever you are talking about.

Look at the post again, I've adjusted the image size.

It looks like you can’t hot link that picture. You can click here to see it: https://www.gm-trucks.com/forums/uploads/monthly_2019_06/5cffff9056848_L8TvsL96SAEHPTorque.jpg.09ecd46ae6943e11235a5d6986010343.jpg