i posted the following question about knock control on the efi101 haltech forum. :
or lack of...since its not a feature should one invest in a J&S Safeguard ?
is it required/necesary? i had a tuner tell me he wouldnt tune my haltech unless i had a j&s safeguard...i had another tuner tell me its not necesary as i long as i run conservative timing...mixed responses...not sure which way to go...
rotorhead says:
Probably tuned 200 Haltech cars and never used any knock safeguards, and never had any problem. If you have been to 101 course you would have learned how to apply the correct timing to your engine. The Haltech has quite fine timing controls (32 load points per 500 RPM) so you shoud be able to tune perfectly for all situations. The key is to start conservatively (ie rich and retarded) and work your way up (The same with any aftermarket ECU). Once you have got good fuel maps with conservative timing you can run through watching for max torque. When you get to power run stages, go up one or 2 degrees at a time and watch torque (u can use the datalog to see what load points the computer is using during a power run). When it gets to the point where you stop making more, you have gone too far and back it off a bit. The 2 tools I use to detect knock are my ears and also the power graphs a DD produces. if you have a nice smooth curve with no 'hiccups' you know you are on the right track. Just remem ber you need the least amount of timing at the point of max torque!
I like the second guy, the first sounds like a bit of a cowboy!
Cheers!
_________________
or lack of...since its not a feature should one invest in a J&S Safeguard ?
is it required/necesary? i had a tuner tell me he wouldnt tune my haltech unless i had a j&s safeguard...i had another tuner tell me its not necesary as i long as i run conservative timing...mixed responses...not sure which way to go...
rotorhead says:
Probably tuned 200 Haltech cars and never used any knock safeguards, and never had any problem. If you have been to 101 course you would have learned how to apply the correct timing to your engine. The Haltech has quite fine timing controls (32 load points per 500 RPM) so you shoud be able to tune perfectly for all situations. The key is to start conservatively (ie rich and retarded) and work your way up (The same with any aftermarket ECU). Once you have got good fuel maps with conservative timing you can run through watching for max torque. When you get to power run stages, go up one or 2 degrees at a time and watch torque (u can use the datalog to see what load points the computer is using during a power run). When it gets to the point where you stop making more, you have gone too far and back it off a bit. The 2 tools I use to detect knock are my ears and also the power graphs a DD produces. if you have a nice smooth curve with no 'hiccups' you know you are on the right track. Just remem ber you need the least amount of timing at the point of max torque!
I like the second guy, the first sounds like a bit of a cowboy!
Cheers!
_________________