short question, will turning the crank angle sensor adjust the timing permanantly, or will the computer just pull it back? cheers luke
it will adjust it perminantley but the computer may move it a little From what I have read the comp only has slight controll over it
nope... may i ask why so? are u advancing it for more power? if so i believe 17 is the go... reduces fuel economy but slight power increase... but i could be wrong
I'm not saying i can give you a definite answer with 100% confidence hence why i'm not speculating. Don't want people to go out adjusting their timing and screwing shit up without knowing what they're doing
Timing, listen here.... Your ECU does NOT automatically compensate for any manually advanced timing. It runs whatever timing has been set in it's tune. Now the important part. Don't go screwing around with advanced timing if you're doing guess work because if you manually advance your timing to say 20 degrees, that's 5 degrees higher than standard 15 degrees at IDLE. Now that actually carries that 5 degree advance the entire way through the rev range, even at WOT, which would be too much. And will be Ping city, so bye bye engine. If you need to do this risky stuff, do it on a dyno so you can tell if there's any pinging while you advance it.
this is why im asking questions. want to see how far i can go before it starts pinging its head off. now with the scan tool will tell me when the knock sensor is operating. so just experimenting, i would'nt go jumping into it without having some idea of what im talking about.
Adjusting timing via the position of the CAS is, to be frank, a hack job. Should always be adjusted via the tune. There are area's of the timing maps you want to advance by 3 and area's you want to advance by 10, you generally don't want to advance timing at cruising rpms and yet may want to advance them quite significantly at mid range and not so much at full noise. Timing is not a backyard tuning topic, and advancing your CAS is a backyard tuning method. Don't do it. If you really want to achieve the most gains with timing advancment then get a piggyback which will allow a tuner to work the timing on a dyno. P.S. That article which is floating around about advancing your timing with the CAS is dangerous propoganda.
well that clears things up a little. i've been taught on distibuters, coils and points and such, so if u need a tune on your old gemini or ford or whatever, then im your man. would like to expand my knowledge base a little further on the subject, so thanks for the info.
Yeah, where the dizzy had specific firing points, the CAS is just a reference to crank rotation and the ecu fires the pots based on the signal from the CAS. Adjusting the CAS to advance timing is just lying to the ecu like putting a resistor between your AFM and ecu to lean out a rich mixture. They might as well convert to carbies and a distributor again if that's their idea of tuning.
like i said, this was just an idea that poped into my head, didnt know if it would work or not so thought id try and get some feed back. no need to crucify me. p.s the resistor on the afm sounds like a good idea. lol, just kidding.
nonononono...didn't mean to crucify you in that last post...the one before I did, but not in that last one There's just been quite a few people of late that have asked similar things because people chase cheap HP without understanding what they are doing...but the lure of an extra 30HP for just adding a simple resistor, or turning the CAS a few degrees, is just too much. They nod they're head and go "oh yeah, shit that doesn't sound safe, won't do that" then read the post again saying how good his car goes now that he put the resistor inline. He goes and does it, and the next phone call is "my car was making this weird metallic rattle at full boost, and now it only runs on 5 cylinders and blows so much smoke it's not funny"...pull the motor apart and I can fit my thumb through the hole he just made in his piston. True story. Won't mention the user's name. And I have a big thumb. Big hole. Massive lean out.
where i work we dont get much call for that sort of tuning, on the old bombs we work on u can get away with that sort of shit. you now oduble head gaskets so you can crank the dizzy right round. would definatly like to learn more about it though.
