For the TRUE Gear HEAD, V8 Firing orders
07-21-2006, 04:12 PM
#16
Fleet of Foot
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Right you are Bob, Ford (late model) is 1-3-7-2-6-5-4-8. That's what I get for posting before checking my facts first! 
Interesting that the firing order for the older Ford V8 blocks is different & kits are sold to change the firing order to the same as the more modern ones.
Interesting that the firing order for the older Ford V8 blocks is different & kits are sold to change the firing order to the same as the more modern ones.
07-21-2006, 10:16 PM
#17
Team Owner
Thread Starter
Hi does anyone have a Ferrari firing order or Lambo F/O
07-21-2006, 11:37 PM
#18
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No, no firing order for those cars though it probably isn't to difficult to find online. There are some good Ferarri forums, I'm sure someone there can tell you.
-I've always been fascinated by engine sound. The best engine sound to my ears is the even-firing V8 engine that the 928 has, and that has nothing to do with the fact that I own one of these cars. I suspect that the staccato rumble that a V8 engine delivers has something to do with exhaust pulses alternately cancelling and then doubling themselves. Think about it: a 944 has the exact same cylinder, and a very similar exhaust, but it has a much higher pitch tone. The deep rumble of a V8 could not be replicated if you geared two 944 engines together....unless you staggered their firing orders and combined their exhaust pipes such that you caused this pulsing effect.
I don't play piano, but I've noted the difference between the white and the black keys. The white keys sound even, and the black keys sound odd, in my opinion. The thing about V6 engines is that though you can also develop the rumble of a V8, you invariably induce a higher tone since these engines have only 3 firing pulses per rotation, as opposed to the V8's four. This means that the tone will be an odd tone, like the black keys on the piano. This the same reason that V10 engines sound like crap! On the Ford trucks forum, the owners of V10 pickups and Excursions always lament the fact that though they spent hundreds of dollars on loud exhausts, they are ready to put the stock system back on because they hate the way the engine sounds.
The only way to solve this is to change the crankshaft and camshafts of the V10 for ones that essentially mimic the V8 firing order by having two cylinders stroking exactly the same. Essentially, you would build a V8, then add two more cylinders at the back of the engine that moved with the #4 and #8. The right crank/cams could make this happen, and then you'd have a V10 that sounds like a V8.
You could make a V12 sound like a V8 this way as well.
N!
-I've always been fascinated by engine sound. The best engine sound to my ears is the even-firing V8 engine that the 928 has, and that has nothing to do with the fact that I own one of these cars. I suspect that the staccato rumble that a V8 engine delivers has something to do with exhaust pulses alternately cancelling and then doubling themselves. Think about it: a 944 has the exact same cylinder, and a very similar exhaust, but it has a much higher pitch tone. The deep rumble of a V8 could not be replicated if you geared two 944 engines together....unless you staggered their firing orders and combined their exhaust pipes such that you caused this pulsing effect.
I don't play piano, but I've noted the difference between the white and the black keys. The white keys sound even, and the black keys sound odd, in my opinion. The thing about V6 engines is that though you can also develop the rumble of a V8, you invariably induce a higher tone since these engines have only 3 firing pulses per rotation, as opposed to the V8's four. This means that the tone will be an odd tone, like the black keys on the piano. This the same reason that V10 engines sound like crap! On the Ford trucks forum, the owners of V10 pickups and Excursions always lament the fact that though they spent hundreds of dollars on loud exhausts, they are ready to put the stock system back on because they hate the way the engine sounds.
The only way to solve this is to change the crankshaft and camshafts of the V10 for ones that essentially mimic the V8 firing order by having two cylinders stroking exactly the same. Essentially, you would build a V8, then add two more cylinders at the back of the engine that moved with the #4 and #8. The right crank/cams could make this happen, and then you'd have a V10 that sounds like a V8.
You could make a V12 sound like a V8 this way as well.
N!
07-22-2006, 03:55 AM
#19
Chronic Tool Dropper
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N!
One of the things that engine buildres get to wrestle with is how to get power from the front cylinders out the back of the engine. Each firing stroke distorts the crank a little. Each compression stroke a little less, and in the opposite direction. Lots of problems mamanging the twisting forces and resistance to try and keep the crank from twisting like a cooked noodle. The torsional stress can be so severe that the timing at the rear cylinders is retarded on some distributor-ignition cars at high load. That torsional stress can easily excite the crank to the point where it "rings". That torsional damper on the nose of the crank is there to try to resist that ringing.
Take that forward to the V10, as you think about firing two cylinders at once, and doing that once per engine revolution to get both 'spare' cylinders fired. Crank would look like a pretzel from the torque of the concurrent cylinders firing. There would be a few extra odd-order harmonics to dampen, I'd guess. There would be a pretty healthy increase in driveline whip too. Vibrations? Nah, they all do that...
Consider then that the way to make them sound better might be to go the Ferrari method, with 180 degree crank throws like those in a flat 10, but installed in the V block. You'ld have to file on the cams a bit to get them just right, ad the distributor would look funny with the odd wire spacing. But it would probably sound pretty cool.
One of the things that engine buildres get to wrestle with is how to get power from the front cylinders out the back of the engine. Each firing stroke distorts the crank a little. Each compression stroke a little less, and in the opposite direction. Lots of problems mamanging the twisting forces and resistance to try and keep the crank from twisting like a cooked noodle. The torsional stress can be so severe that the timing at the rear cylinders is retarded on some distributor-ignition cars at high load. That torsional stress can easily excite the crank to the point where it "rings". That torsional damper on the nose of the crank is there to try to resist that ringing.
Take that forward to the V10, as you think about firing two cylinders at once, and doing that once per engine revolution to get both 'spare' cylinders fired. Crank would look like a pretzel from the torque of the concurrent cylinders firing. There would be a few extra odd-order harmonics to dampen, I'd guess. There would be a pretty healthy increase in driveline whip too. Vibrations? Nah, they all do that...
Consider then that the way to make them sound better might be to go the Ferrari method, with 180 degree crank throws like those in a flat 10, but installed in the V block. You'ld have to file on the cams a bit to get them just right, ad the distributor would look funny with the odd wire spacing. But it would probably sound pretty cool.
07-22-2006, 11:16 PM
#21
Rennlist Member
Originally Posted by jeff jackson
All Mopar V8s are 1-8-4-3-6-5-7-2 as well....big...or small block..... Hemis included.
Hammer
