Any good info on the new RY45 block and heads?

[Warp Speed]

Ya, seems a little strange.
It's a cool platform to build from. But you'd think that doing a project like that, you would make any necessary revisions to remove the NASCAR limitations, and better suit it for more liberal rules and running conditions.
Sounds like they didn't change much but make provsions for a larger stroke?

[Hardcharger55]

This engine was never designed to be used in nascar. It was designed to be used in open competition circle track and off road. It's not limited to nascar rules whatsoever. The real market is Dirt Super Late Model and Trophy Truck off-road racing. Not a nascar engine.

[Warp Speed]

This engine was never designed to be used in nascar. It was designed to be used in open competition circle track and off road. It's not limited to nascar rules whatsoever. The real market is Dirt Super Late Model and Trophy Truck off-road racing. Not a nascar engine.

It is based off of the FR9. Unfortunately, when the re worked it in aluminum, they left it without siamesed bores, just like the FR9. This is done for cooling purposes when running extreme temperatures in Cup. Being aluminum, this limits the current design to a 4.150 bore. That is a pretty big limitation to overcome when building a large ci race engine with liberal rules such as a dirt late model. Which is what it is intended for.
That is the reason they don't list maximum bore size on their web site! LOL
Kind of a waste of a 4.5 bore spacing if you ask me but.............

[DavidM]

This engine was never designed to be used in nascar. It was designed to be used in open competition circle track and off road. It's not limited to nascar rules whatsoever. The real market is Dirt Super Late Model and Trophy Truck off-road racing. Not a nascar engine.

It is based off of the FR9. Unfortunately, when the re worked it in aluminum, they left it without siamesed bores, just like the FR9. This is done for cooling purposes when running extreme temperatures in Cup. Being aluminum, this limits the current design to a 4.150 bore. That is a pretty big limitation to overcome when building a large ci race engine with liberal rules such as a dirt late model. Which is what it is intended for.
That is the reason they don't list maximum bore size on their web site! LOL
Kind of a waste of a 4.5 bore spacing if you ask me but.............

Ford’s PTWA (linerless) coating technology...

[cncguy987]

Totally agree. Spray on liners would have been the way to go.

[Warp Speed]

How would a sprayed liner help in this application?

[cncguy987]

When you bore the OD of the sleeve, It removes all the material between the bores. You could easily go 4.200 on the bore and still have material for a siamese bore. think they also did that for CFD. and cooling reasons.

[DavidM]

How would a sprayed liner help in this application?

It's sprayed straight on to the aluminum. No bore size lost to an iron sleeve.

Check out this link...

http://jalopnik.com/5467038/the-ford-en ... issan-gt-r

[Rizzle]

How would a sprayed liner help in this application?

It's sprayed straight on to the aluminum. No bore size lost to an iron sleeve.

Check out this link...

http://jalopnik.com/5467038/the-ford-en ... issan-gt-r

Thanks, thats pretty interesting.

[Warp Speed]

When you bore the OD of the sleeve, It removes all the material between the bores. You could easily go 4.200 on the bore and still have material for a siamese bore. think they also did that for CFD. and cooling reasons.

I am we'll aware of the process. But how would it help with this design?
It is not for lack of room that is limiting bore size, as the block has a 4.500 bore space. It is the lack of material cross section between the cylinders. The aluminum version is evidently NOT a siamese bore, or it wouldn't have a 4.150 bore limit. The CF version used in Cup isn't Siamese to allow for coolant flow between the bores for extreme temps. When designing an aluminum version targeted at large ci dirt late model engines, why didn't they Siamese the bores to give the new material the needed strength/cross section to allow for a larger bore? Bore size is valve area, and IMO, the 4.150 max size is a serious design flaw for the intended application.
The spray liner would allow for a larger bore, but still no base material to support it...............

[cncguy987]

Draw two circles 4.15 in diameter 4.5 inches apart. Parallel both circles .200 for sleeve thickness and you will see it removes all the material between the bores. I think they purposely did this to get water between the bores. If you sprayed the liners on, you would have nice about of material between the bores. If this does not make sense, I have some sections I can sent you. Tried attaching them but we're to big.

[Warp Speed]

Draw two circles 4.15 in diameter 4.5 inches apart. Parallel both circles .200 for sleeve thickness and you will see it removes all the material between the bores. I think they purposely did this to get water between the bores. If you sprayed the liners on, you would have nice about of material between the bores. If this does not make sense, I have some sections I can sent you. Tried attaching them but we're to big.

WHY?

With spray in liners, and a NON Siamese bore, you won't have enough material to hold ring seal. At 4.200 with Compacted Graphite and this Nascar type NON Siamese design, as this block is, it is pushing the limits as far as cylinder wall thickness goes. You think aluminum at this same cross section, aluminum will be stronger than the CF used in the original FR9?

[cncguy987]

I think we are saying the same thing. If there was a drag racing option, with spray liners and a siamese bore, .300 material would handle most applications. Same as a fr9 block? Probably not but would nice to have with the new heads. Option two would have spray liners with water cross flowing at the top of the block wear the piston thrust would be less. That would be an interesting can project to see how thin you could get and how much load the spray on liners take.

[cncguy987]

Someone must know some other useful info about the engine?

[cncguy987]

Anyone using these parts yet?? Any updates?