TurboLamik Posted July 19 Report Share Posted July 19 How do I add decimal places to dwell times? My R35 coils from Haltech come with a spec sheet that is more precise than one decimal place Quote Link to comment Share on other sites More sharing options...
David Ferguson Posted July 20 Report Share Posted July 20 I would just round the values. There is no reason to time the coil charging to finer resolution than 1/10,000ths of a second. Adamw 1 Quote Link to comment Share on other sites More sharing options...
TurboLamik Posted July 21 Author Report Share Posted July 21 I did but you would think theres a reason why Haltech list it to 3 decimal places Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 22 Report Share Posted July 22 There is no reason, most likely just to match the format of the table in their software or it was copy and pasted from the source that way. In real life even with a high resolution trigger system your commanded dwell will have to vary by about +/-0.1ms when the predicted crank speed/position changes. With poor resolution triggers it can be significantly more. Quote Link to comment Share on other sites More sharing options...
JMP Posted July 22 Report Share Posted July 22 so Haltech dont use Genuine Hitachi or Hanshin coils in their kit? The dwell table for genuine coils is quite different TurboLamik 1 Quote Link to comment Share on other sites More sharing options...
David Ferguson Posted July 22 Report Share Posted July 22 That table suggests someone tested those coils to determine time required to achieve maximum output, then reduced it by 15%. Depending on the intended RPM range, you may need to reduce the dwell times to meet a maximum duty cycle. It's not always about maximum output. TurboLamik 1 Quote Link to comment Share on other sites More sharing options...
JMP Posted July 23 Report Share Posted July 23 19 hours ago, David Ferguson said: That table suggests someone tested those coils to determine time required to achieve maximum output, then reduced it by 15%. Depending on the intended RPM range, you may need to reduce the dwell times to meet a maximum duty cycle. It's not always about maximum output. it's from the testing Platinum Racing Products did to confirm dwell ranges on a bunch of coils. TurboLamik 1 Quote Link to comment Share on other sites More sharing options...
Rossobianconero Posted July 24 Report Share Posted July 24 13 hours ago, JMP said: it's from the testing Platinum Racing Products did to confirm dwell ranges on a bunch of coils. I always start with the PRP table, the ideal is to run the minimum Dwell that give max power. Like anything, reach that point when you get the most out of it, with the less stress on the parts in this case the coils. JMP 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.