1ltcap

they increased the bore, supposedly strengthened it, and lightened it with that spray technology. it apparently works.

firebird99

iTrader: (2)

^^^^ yeah they did alot to reach the new power levels and you would think adding a longer stroke to keep the walls as thick as possible would have been better but that may affect other things that could not have been fixed with a special coating. Guess only time will tell if ford hurt the long term durability or not hopefully not for the consumers sake,hell I'm still waiting to see how much abuse the cast bottom end of the zl1 can take:-/

LS1LT1

iTrader: (16)

Especially with forced induction or nitrous applications, though it could even apply to NA engines.

Heater

The stroke on the 5.4 is too long as it is, so stroking it was not the best option.

1ltcap

the process that they used on this blocks cylinders, is the same process which is used in the nissan gtr engines. ford also holds the patent on this process i believe.

1QWIKZ

iTrader: (6)

you are correct, the GT-R uses Ford's proprietary method...and as you can see, the GT-Rs have been proving it works.

SSCamaro99_3

iTrader: (1)

PTWA was used on the 5.4 aluminum block as well.

Modular V8 bore spacing is 3.937 and the 5.8 has a 3.68 bore. Leaves 0.1285 wall thickness

LS9/LSA is a 4.4 bore spacing and 4.06 bore. Leaves 0.17 wall thickness.

The long bores needed to get any displacement was something that always bothered me about the Modular family. They went with all the fancy cams and valves and then packaged the whole thing with midget bore spacing so that it could fit in FWD applications. For a long time the Modular family and the LS series had very similar 6200ish fuel shutoffs in factory trim. What was the point of all the complexity and weight for a package that made less or similar power and wouldn't outrev a "dinosaur" pushrod aplication.

firebird99

iTrader: (2)

Well like I said i hope it works because even as a GM guy I would hate to see something like that be the week point if a nasty ride. Now as far as proving its worth on the gtr how thick are the walls of that motor compared to a gt500 motor plus does it leave any more for a rebuild lets say at 30 over and if the motor is rebuilt how strong will it be not having that coating? And for the comment about small bore spacing I would love to see a 400+ci gt500 motor it would be crazy.

1ltcap

This 2013 Ford Shelby GT500 durability prototype, however, has a different future; it will be in the hands of a private collector. Ford is auctioning off the car to benefit the Juvenile Diabetes Research Foundation at Barrett-Jackson this Saturday at 8:30pm.

Originally built in 2007, this car was converted to 2013 specs (5.8-liter, 650-horsepower) and tested for 24-hours at Sebring.

1QWIKZ

iTrader: (6)

The coyote spins to 7000rpm, roadrunner has a 7500rpm limit, trinity has a 7000 rpm limit...looks like they out-rev the pushrods to me..

Marc 85Z28

iTrader: (8)

You didn't even read what you quoted!!!!

SSCamaro99_3

iTrader: (1)

If you re-read, I said for a long time and in factory trim. The three you mention came out in 2010 ish and later. So from 1990/91-2009 this was the case. If we want to cherry pick LS7 has a 7100 rpm limit.

1QWIKZ

iTrader: (6)

Lol..my bad.

1ltcap

AND from about 79 till about 90-91, it was the other way 'round.

Marc 85Z28

iTrader: (8)

WHAT?! I'm pretty certain GMs pushrod engines compared just fine to the Ford pushrod engines during that period. But that's not what he was talking about... He was comparing pushrod tech to Ford's supposedly superior OHC tech. Try to keep up!

BOBS99SS

iTrader: (2)

Gt500 is going to spank the zl1 all over the track, maybe gm will man up and do something with a turbo for the next round

LS1LT1

iTrader: (16)

Well, the '82-'95 Mustang 5.0 HO motors were (relatively speaking) pretty high winding small blocks, but the GM L69 5.0L and even the TPI LB9 5.0L weren't too bad in that regard either.
If we're simply talking 'revability'/RPMs and not just total peak power outputs that is.

1ltcap

i know what he was talking about. i just like to remind you guys that there were camaros before the 4th gen....and they weren't that fast. but they were built in the good ole usa at least.

1ltcap

didn't they build a prototype twin turbo at one point? one that burnt to the ground or something like that?

NW-99SS

iTrader: (6)

There were just as many or more slower Mustangs before the fox bodies as well

And a vehicle assembled in Canada (F-bodies from 82-02) by parts from all over the world is less than one assembled in the USA by the same variety of parts how?