chilli Posted September 26, 2006 Share Posted September 26, 2006 is it possible to fit a det sensor to give immediate warning of det on the dash? bit like det cans but just sensing all the time and warning you if there are any signs of it? never heard of one but just wondered why. If they don't exist I wonder why not, hard to sense? Quote Link to comment Share on other sites More sharing options...
Ian C Posted September 27, 2006 Share Posted September 27, 2006 I've just ordered one of these off Nic. It's the HKS Knock Amp. And it's Not Frickin' Cheap either, which is probably why people don't have them. Gonna see if it's actually any good -Ian Quote Link to comment Share on other sites More sharing options...
Terminator Posted September 27, 2006 Share Posted September 27, 2006 Going ultra lean Ian? I would have thought whilst a light on the dash may be pretty, if you see it flashing it is to late anyway. I presume the HKS unit is a bit more sophisticated than that and can be set up to induce more sensitive protection than the stock items. Quote Link to comment Share on other sites More sharing options...
Ian C Posted September 27, 2006 Share Posted September 27, 2006 I think it's got a scaled output, so it warns you of the odd sping all the way up to nuclear explosion. It's also apparently got an audible alarm, which is great because you can take that and plumb in a fuel cut mechanism to it My wallet has gone lean lol -Ian Quote Link to comment Share on other sites More sharing options...
chilli Posted September 27, 2006 Author Share Posted September 27, 2006 ahhh cool, what sort of figure are we talking here then, £1000+? must be a market for cheap knock sensors - hmmm *ding* idea for a project there lol let us know how you find it, if it works it's a lot cheaper than a new engine... Quote Link to comment Share on other sites More sharing options...
Ian C Posted September 27, 2006 Share Posted September 27, 2006 I can't say how much it is as it's a special deal for what it is but you aren't going to get much change out of £600 Trouble is it does AFR monitoring too which I just don't need as I've already got it, so I'm kinda paying for a big function that I won't use, hey ho. Yes, it's cheaper than a new engine I guess, if it works I always wondered why more people don't have them, so maybe I'll find out they don't work or something. -Ian Quote Link to comment Share on other sites More sharing options...
chilli Posted September 27, 2006 Author Share Posted September 27, 2006 be interested to know how you find it then. be great if it does work properly. I guess they are not available just as det detectors then? Shame if that puts the price up, I too already have W02 sensing. I wonder how it works, guess in simplistic terms it is a microphone / filtering and maybe some DSP to recognise the signature of det, or maybe even all the signal conditioning is done in analog since it can't be that involved can it Quote Link to comment Share on other sites More sharing options...
Terminator Posted September 29, 2006 Share Posted September 29, 2006 So it has dual functionality. In that case it sounds alot better. Can it triger an alarm/ additional fuel if AFR's reach a predetermined level too. I may be wrong but I thought AFRs going critical always were ahead of det. Quote Link to comment Share on other sites More sharing options...
carl0s Posted September 30, 2006 Share Posted September 30, 2006 I thought there was a very well known device like this, used by all the Scoobie people.. knock-link or something. Quote Link to comment Share on other sites More sharing options...
chilli Posted September 30, 2006 Author Share Posted September 30, 2006 So it has dual functionality. In that case it sounds alot better. Can it triger an alarm/ additional fuel if AFR's reach a predetermined level too. I may be wrong but I thought AFRs going critical always were ahead of det. you might well be right, but are lean AFRs the only way to get det for sure? what about high inlet temps (duff IC) etc or do they all manifest as lean AFRs first? Quote Link to comment Share on other sites More sharing options...
Alex Posted September 30, 2006 Share Posted September 30, 2006 Lean AFR's and Knock are the 2 ways to kill it, so if it monitors both you're safe enough...ie it's doing enough to help. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 12, 2006 Share Posted October 12, 2006 Has it got a dedicated sensor, or does it use the two std ones? the alarm output would be very useful as Ian says, it could also be used to retard ign timing or add extra fuel at the onset of det if you have some form of engine management. Quote Link to comment Share on other sites More sharing options...
Pixelfill Posted October 12, 2006 Share Posted October 12, 2006 Lean AFR's and Knock are the 2 ways to kill it, so if it monitors both you're safe enough...ie it's doing enough to help. Sorry to sound thick, but by lean AFRs are you talking at the 10 end or the 17 end. I presume you mean lean fuel, and therefore at the 17 end. Mike Quote Link to comment Share on other sites More sharing options...
Alex Posted October 12, 2006 Share Posted October 12, 2006 Ricky, It uses the stock sensors, it also monitors the crank and cam signals. Ian's arrived today, so he'll have news over the weekend. Mike, Lean is different dependent on what you're doing at the time. But if we look at Wide Open Throttle, this should see a safe 11.3-11.7:1 (rich)...10's would be richer and safer still but you'd lose power and economy. 13:1 would be dangerously lean on boost...not enough fuel. It's x parts air : x part fuel. 13 parts of air to 1 part of fuel = less fuel to air. Quote Link to comment Share on other sites More sharing options...
Miguel Posted October 12, 2006 Share Posted October 12, 2006 Bit of bumph , Copied and pasted. The HKS A/F Knock Amp is an electronic monitoring device that displays two of the most vital engine conditions for tuning; engine knock and air/fuel ratio. Engine knock occurs when there is abnormal combustion knock as detonation; which can rob power, reduce engine longevity and even lead to catastrophic failure. The A/F Knock Amp utilizes the factory knock sensor, allowing you to monitor in real time engine knock visually and audibly via earphones (not included). By adding the optional HKS wide-band O2 sensor, air/fuel ratio can be monitored visually on the back-lit LCD display. A warning function can be set for both engine knock and air/fuel ratio where an audible alert sounds if the preset warning is reached. Quote Link to comment Share on other sites More sharing options...
Nic Posted October 13, 2006 Share Posted October 13, 2006 If anyone else wants to try the HKS Knock Amp I'll do a special price of £430 including postage. http://www.hksusa.com/products/?id=1694 http://www.hksusa.com/images_products/L_1751.jpg Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted October 13, 2006 Share Posted October 13, 2006 If anyone else wants to try the HKS Knock Amp I'll do a special price of £430 including postage. http://www.hksusa.com/products/?id=1694 [qimg]http://www.hksusa.com/images_products/L_1751.jpg[/qimg] You evil man:rolleyes: maybe you should change your name to "old Nick" as in "get thee behind me" going to have to apply for another credit card soon:innocent: Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 13, 2006 Share Posted October 13, 2006 I'll warn you now, the instructions are in Japanese I managed to wire it up in a feat of intuition, guesswork, experience, and hieroglyphics-matching that would have shamed Daniel Jackson, but there are 18 menus and they just show a number, so I really need the English instructions to get any further! If anyone has them or can translate, let me know Once I've got it all together I'll knock up a fitting and usage guide and a review and stuff I realised why it uses crank and cam angle sensors - it actually uses them to know when a cylinder should be going off or not and also to know how fast the engine is going, so it can factor those into the noises it's hearing. So it's quite a sophisticated bit of kit by the initial look of it. -Ian Quote Link to comment Share on other sites More sharing options...
Thorin Posted October 13, 2006 Share Posted October 13, 2006 Once I've got it all together I'll knock up a fitting and usage guide and a review and stuff I'll look forward to reading it tonight when I get in then, get to it! I realised why it uses crank and cam angle sensors - it actually uses them to know when a cylinder should be going off or not and also to know how fast the engine is going, so it can factor those into the noises it's hearing. So it's quite a sophisticated bit of kit by the initial look of it. Oooh so it's a bit cleverer than just listening for noises then Quote Link to comment Share on other sites More sharing options...
chilli Posted October 13, 2006 Author Share Posted October 13, 2006 nice one, look forward to reading your review when it's all sorted Quote Link to comment Share on other sites More sharing options...
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