firing order by degree.
#1
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firing order by degree.
I'm planning headers for my build and have a pretty good idea how to do that. I searched the net and can't seem to make sense of where each of the plugs fire in terms of crank degree. This is a problem that relates to pulse tuning the primaries so if anyone know when the buggers fire i'd appreciate learning about it.
#2
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I'm planning headers for my build and have a pretty good idea how to do that. I searched the net and can't seem to make sense of where each of the plugs fire in terms of crank degree. This is a problem that relates to pulse tuning the primaries so if anyone know when the buggers fire i'd appreciate learning about it.
Are you planning 4 into 2 into 1 headers? Why? If you are planning 4 into 1s, why are you concerned about "primary pulse tuning" other than length and diameter of the primaries?
#5
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I'm considering 180 headers and logic tells me firing should be 90 apart. I get confused with LR LL RL RR. The distance the pulse has to travel is quite long with crossovers at the back so I want to pair the left with rights and need to know time and distance. Merging pairs with short primaries @ 1.625 into 1.75 secondaries and merging those into 2.5 collectors. Why? For the hell of it. Its a project fitting an LS into a 968 Porsche and it has to have sound. But my understanding is the 180s also scavenge very well.
The LS firing order is 1-8-7-2-6-5-4-3, and they fire 90° apart. If you assume#1 fires at 0°, #8 at 90°, etc. you can figure out the rest. Remember it takes 2 complete revs (720°) to fire all eight cylinders.
Are you planning 4 into 2 into 1 headers? Why? If you are planning 4 into 1s, why are you concerned about "primary pulse tuning" other than length and diameter of the primaries?
Are you planning 4 into 2 into 1 headers? Why? If you are planning 4 into 1s, why are you concerned about "primary pulse tuning" other than length and diameter of the primaries?
#6
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I'm considering 180 headers and logic tells me firing should be 90 apart. I get confused with LR LL RL RR. The distance the pulse has to travel is quite long with crossovers at the back so I want to pair the left with rights and need to know time and distance. Merging pairs with short primaries @ 1.625 into 1.75 secondaries and merging those into 2.5 collectors. Why? For the hell of it. Its a project fitting an LS into a 968 Porsche and it has to have sound. But my understanding is the 180s also scavenge very well.
You didn't ask for advice about making power, so i won't bore you with any other than what I just said above.
Have fun..
#7
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Thanks for the info. I appreciate it. I can't see how you could consider little knowledge regarding an exhaust is dangerous though. You are right i didn't ask advice regarding making power as thats not the point of the exercise and if it doesn't work so what.
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#8
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Show car, huh? Oh well.