5.2 FPC - Devil's Advocate

[Falc'man]

Recently we learned that Chevrolet couldn't make enough power in atmo form for the Z06 because of emissions, so they went down the blown route. Some people may not care about that but to put it into perspective if we are comparing apples for apples then we can also say that Chev has fallen short, managing less power from more cubes than Trinity.

Now I bet if Ford had more cubes with this Coyote platform, like maybe 6 litres, then it'd be nudging 650hp without issues. Or the same as the blown LT4.

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[Erik427]

OK, hold on to your hats....

In late 2005, GM brought us a 505HP, 470 lb-ft, 3200lb Z06 which debuted as a 2006 model.

Now, a DECADE F'G later, Ford brings us a 500-ish HP; 400-ish TQ 3600LB (est) Mustang and everyone is excited. Really?

OK, you say the LS7 is 7.0L and the FPC Ford is only 5.2L. Yep, who cares? I would think that the LS7 is physically smaller and lighter than the 5.2????

So, convince me. Is Ford really moving the needle forward with a bigger, heavier motor in a porky, heavier car - a DECADE after GM? Is this progress?

I'll give in on one point (so far). I think the FPC will sound better..... that's what 10-years has brought us.

First of all, the Coyote is not that much heavier. Second, to make 500hp with a 5.2 L motor is much harder than a 7L. The rate of RPM climb with any Coyote is far faster than any LS. This is a area where the Coyote destroys the LS Chevy. HP and TQ are only two parts of a three part equation. The Coyote's crank, rods and pistons are lighter. Far less parasitic valve train loss (a hallmark for ohc's). Does not suffer from the windage problems that the ls has (over oiled bottom end, oil drain back and the drag caused by the crank having to beat thru all that excessive oil). The ls suffers from valve train bind/friction and is top end oil starved. This is why IMSA and SCCA allow Chevy to use the ls7 against much smaller motors like the Coyote. The 5.0 Coyote has a little problem at 5.0 liters, the bore restricts breathing. This is why porting the heads offers little in return with a stock bore due to valve shrouding. Increase it to 5.2 liters (3.700 inch bore) and the breathing greatly improves. Never mind the extra displacement. Now add a much lighter FPC and due to the firing order, the breathing gets even better. Especially on the exhaust side. The difference in the rate of RPM climb (VOODO vs LS7) will be like comparing a F-15 to a Bi plane.

 

[pappy83]

If the coyote is so great why does my old pushrod 6.1 hemi in a heavier car not get beat at the strip very often by them and even in roll races often beats them. I am a Ford guy have had many blown 87-93 cars still have a beautiful 93 cobra but if you guys think that Ford has really blown all the other manufacturers away with there OHC motors I don't agree. If the new voodoo propels the new Mustang just as well or better then my z06 I will be in line for one if not I will HCI the vette and roll race all those fast revving voodoo cars the ls7 is a fantastic motor so hopefully is the 5.2 but the one question I still have if these OHC engines are so great why does my crown vic or marauder for that matter keep getting its butt handed to it by a bone stock 94 impala. Also if the new gt350 is only going to weigh 400 pounds or so more then a C6Z06 then it's new F-15type rpm climb should have it running times like the vette want to bet it actually does.

 

[Vernichtung]

Recently we learned that Chevrolet couldn't make enough power in atmo form for the Z06 because of emissions, so they went down the blown route. Some people may not care about that but to put it into perspective if we are comparing apples for apples then we can also say that Chev has fallen short, managing less power from more cubes than Trinity.

Now I bet if Ford had more cubes with this Coyote platform, like maybe 6 litres, then it'd be nudging 650hp without issues. Or the same as the blown LT4.

Exactly. When all is said and done, Voodoo will undoubtedly be producing somewhere around -- or right at -- 100 horsepower per liter. No matter how one spins it, the fact that an engine such as this -- naturally-aspirated, mind you -- will find its way under the hood of a Mustang is mighty impressive, in my opinion.

 

[pappy83]

I also think it will be impressive but at what cost for one who cares if it's done with smaller displacement if it weighs more and is more complicated to work on your average ls7 can have heads changed and cam installed in not much more then a full day. I am just playing Devils advocate here I really don't think any of these new cars are better by any manufacturer just more complicated. I just wish mustangs would lose some weight that is one of the biggest detractors in buying one. If they spent less money on complicated engines and more on lightning the cars they would probably perform better. The z06 will always run around a track better and run through the quarter better because it weighs less has bigger tires is balanced better and yes is 9 years old now. I really like the 13-14 gt500 cars but they never ran good at our track on Street tires they weighed to much. I would rather have a light car then a heavy one with a Ferrari type crank that revs fast.

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