Roush 588 cu in R motor

[blykins]

Yes, the A460 block.

With a factory block, you can only go to about 550-560 cubic inches safely. The A460 block will go to a 4.600-4.625" bore, which is considerably larger than the capacity of a factory block (usually max around 4.420-4.440").

Otherwise everything costs the same....same crank, same rods, same piston cost, etc.

IMO, the A460 head is simply a better head and that will show up in the potential while porting. The P51 head will top out somewhere around 400-420 cfm, while the A460 head will go 500+.

Header size needs to be 2" to 2-1/4".

IMO, the BBF is *the* pinnacle of performance in the Ford engine line-up. The shop where I dyno my engines had a 600 inch mud race engine on the dyno the other day. 1030 hp, with over 900 lb-ft of torque. Naturally aspirated.

[Pman1961]

Go ahead and have Brent build you one Ace23. I'll install but you're riding shotgun for the first 2,000 miles!!

[STL Mark]

Pappy,

I had a 385 series engine in my Superformace. It was bored and stroked to 588. It made 650 HP, and 720 Tq. I loved it. You will too. It pushes a bit in the corners. and nailing the loud pedal at any speed or gear was always fun...and a bit dangerous. But, get all of the RT suspension upgrades and you'll be fine.

Just do it.

BTW, Brent's figures and prices seem to be outstanding and excellent. If I was doing it again, he would be my first call.

All the best.

[Ace23]

Originally Posted by STL Mark

Pappy,

I had a 385 series engine in my Superformace. It was bored and stroked to 588. It made 650 HP, and 720 Tq. I loved it. You will too. It pushes a bit in the corners. and nailing the loud pedal at any speed or gear was always fun...and a bit dangerous. But, get all of the RT suspension upgrades and you'll be fine.

Just do it.

BTW, Brent's figures and prices seem to be outstanding and excellent. If I was doing it again, he would be my first call.

All the best.

I just have to be the guy that ask....could you eclipse 6mpg cruising? Carb or FI and what type of headers and side pipes were you running? I bet that was an absolute handful and the some.

[STL Mark]

Laughing out loud at that one. Why YES, I did eclipse 6 mpg sometimes. I got 10/12 on the highway, 8 in town sometimes, and about 6mpg at the track. A tank of gas was good to about 120 miles, but I never risked it and stopped at most every gas station I could find while on club cruises.

950 Quickfuel, New style Super Cobra Jet heads, stock SPF headers with stock sidepipes serviced to remove a lot of the baffling.

Damn thing was smelly, loud, and so fast. I would do it again in a minute.

[Ace23]

Originally Posted by STL Mark

Laughing out loud at that one. Why YES, I did eclipse 6 mpg sometimes. I got 10/12 on the highway, 8 in town sometimes, and about 6mpg at the track. A tank of gas was good to about 120 miles, but I never risked it and stopped at most every gas station I could find while on club cruises.

950 Quickfuel, New style Super Cobra Jet heads, stock SPF headers with stock sidepipes serviced to remove a lot of the baffling.

Damn thing was smelly, loud, and so fast. I would do it again in a minute.

That is awesome to hear how you would do it again. I'm sure it was way more power than anyone needs but I imagine it was awesome on the street due to the fact that it had power everywhere in the RPM range. I currently have a 427W but will likely go the BBF route down the line. It's insane that we have such large CI motors that make crazy power and we are always thinking of having a bit more

[Ace23]

Originally Posted by Pman1961

Go ahead and have Brent build you one Ace23. I'll install but you're riding shotgun for the first 2,000 miles!!

I think we are committed to the current engines cam swap first. Wouldn't the neighbors just love a 600ci engine with 3.5" sidepipes firing up for one of my late night rides.....it would probably blow shingles off your roof.