POwer level on s4 rear iron
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POwer level on s4 rear iron
I was wondering how much power can a s4 t2 rear iron handle before braking my set up at the most will be making 350-370whp I just want to make sure that the iron can hold that without stressing too much.
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pay more attention
then the bigger problems become heat management and making the system as a whole work as effciently as possible to minimize stress, but don't take 400whp as an iron clad rule, its just that above that the internal streeses are getting high, but every setup varies.
then the bigger problems become heat management and making the system as a whole work as effciently as possible to minimize stress, but don't take 400whp as an iron clad rule, its just that above that the internal streeses are getting high, but every setup varies.
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Engine, Not Motor
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"Pay attention" is the exact answer.
There are some ECUs commonly used that are prone to ignition noise more then others. If you have one of those ECUs, then it's VERY important to insure you are not getting noise on the CAS signal. If you are, it's not huge deal sub-400HP. But at higher levels, you're going to end up firing into the compression stroke of a very volatile mixture and you'll crack an iron easily. Most people who break irons and were smart enough to datalog their runs end up seeing some big RPM spikes right around the time the iron broke. That's noise.
All the AI and tuning in the world won't do a thing if your ECU is trying to fire the engine as if it was running 19,000 RPM when it's just coming up on 6,000 RPM.
There are some ECUs commonly used that are prone to ignition noise more then others. If you have one of those ECUs, then it's VERY important to insure you are not getting noise on the CAS signal. If you are, it's not huge deal sub-400HP. But at higher levels, you're going to end up firing into the compression stroke of a very volatile mixture and you'll crack an iron easily. Most people who break irons and were smart enough to datalog their runs end up seeing some big RPM spikes right around the time the iron broke. That's noise.
All the AI and tuning in the world won't do a thing if your ECU is trying to fire the engine as if it was running 19,000 RPM when it's just coming up on 6,000 RPM.
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I've been mid 400s at the engine with S4 irons for 2.5 years.
Hell, just getting to work this morning I took a turn too tight which caused my fuel pump to suck air at around 10 PSI. Engine pinged, backfired, chugged and then went right back to normal.
Note to self: sump tank.
Hell, just getting to work this morning I took a turn too tight which caused my fuel pump to suck air at around 10 PSI. Engine pinged, backfired, chugged and then went right back to normal.
Note to self: sump tank.
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S4 irons are pretty hardy, but they will fail structurally at higher HP levels no matter HOW safe you try to make it.
I was running mine at around 427 ish HP when I lost the wastegate line. Boost spike to 30 PSI but NO detonation and that cracked the land. My guess is it was somewhere in the 500 ish range when it puked.
you CAN however, keep that alive at 400 hp. Many of us have done it.
I was running mine at around 427 ish HP when I lost the wastegate line. Boost spike to 30 PSI but NO detonation and that cracked the land. My guess is it was somewhere in the 500 ish range when it puked.
you CAN however, keep that alive at 400 hp. Many of us have done it.
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