Gauging Interest - Inexpensive Electronic Det Cans - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


ECUs and Tuning Discuss Engine Management, Tuning, & Programming

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 01-07-2010, 03:35 AM   #41
Senior Member
iTrader: (7)
 
Join Date: Dec 2006
Location: Chicagoland
Posts: 1,362
Total Cats: 3
Default

Very interested...
jtothawhat is offline   Reply With Quote
Old 01-09-2010, 12:50 AM   #42
Senior Member
iTrader: (4)
 
Join Date: Nov 2009
Location: Toronto, ON
Posts: 1,479
Total Cats: 6
Default

I'm in. What's the ETA on these?
dgmorr is offline   Reply With Quote
Old 01-09-2010, 02:48 AM   #43
Elite Member
 
Join Date: Jul 2005
Posts: 6,454
Total Cats: 80
Default

Just FWIW.

For years I've been using some Radio Shack gizmo "amplified ears" or some such. It has stereo mikes in the box; I disconnected one, then took out the other, and connected it to both mic inputs, put it on the end of a cable, and glued it into a large battery jumper clip, which I clip under the intake mani. I also had to reduce the "gain" of the circuit (it was waaaaaaaaaaaaay too loud, as the box is originally designed to increase your hearing's sensitivity), by swapping a resistor. Even with the built-in volume **** set to minimum, it was clipping.

Knock is very obvious. At low RPM, you'll hear high frequency bell-like ringing; at high RPM, you'll hear the characteristic "tink tink".

Tip: to use at the dyno, hi-fi in-ear noise-blocking 'phones work best. It is important to block out ambient noise, or you'll go deaf. I love my Monster Turbines which I use on airplanes and in general.
JasonC SBB is offline   Reply With Quote
Old 01-09-2010, 12:15 PM   #44
Elite Member
iTrader: (24)
 
Join Date: Jul 2007
Location: Cypress, TX
Posts: 3,778
Total Cats: 35
Default

I
n
Bryce is offline   Reply With Quote
Old 01-10-2010, 01:47 PM   #45
Elite Member
Thread Starter
iTrader: (10)
 
Join Date: Oct 2008
Location: Seattle, Wa
Posts: 1,780
Total Cats: 30
Default

UPDATE:
I finished the first "complete" model last night. Seems to work well (Though its not as nice looking as I'd like. Radioshack is worthless when it comes to finding the exact parts I want, had to make due). I'm heading over to the SKmetalworks lair to get an exhaust rattle fixed so that I can actually hear something other than that annoying buzz. I'll post some pictures later tonight.
Jeff_Ciesielski is offline   Reply With Quote
Old 01-10-2010, 01:50 PM   #46
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,197
Total Cats: 2,584
Default

Can't wait for these to be tested to be good and for sale
18psi is offline   Reply With Quote
Old 01-10-2010, 08:10 PM   #47
Senior Member
iTrader: (4)
 
Join Date: Nov 2009
Location: Toronto, ON
Posts: 1,479
Total Cats: 6
Default

Quote:
Originally Posted by Jeff_Ciesielski View Post
Made some improvements to the design, the output is MUCH cleaner now.

Sample

I'd love to get some feedback from the people who showed interest in the idea. If people are still on board I can crank out a final version so you can see what you'd be getting.
I don't know if it's just my netbook speakers clipping, but at what time stamp is there detonation?
dgmorr is offline   Reply With Quote
Old 01-10-2010, 10:12 PM   #48
Elite Member
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

Jeff and I tested out the "final" model today and worked great with the noise canceling ear buds. FWIW Jeff, this one looks way better than an exposed circuit board with exposed wires and transistors everywhere.
SKMetalworks is offline   Reply With Quote
Old 01-10-2010, 10:13 PM   #49
Elite Member
iTrader: (28)
 
Join Date: May 2008
Location: St. Augustine FL
Posts: 2,310
Total Cats: 2
Default

hurry up and make these man lolol I need them jk I'd rather you take your time and do them right the first time!!!
p51hellfire is offline   Reply With Quote
Old 01-10-2010, 11:22 PM   #50
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,109
Total Cats: 518
Default

pics si vous plait. If we need to eliminate all other rattles in the engine bay and car, I'm screwed.
curly is offline   Reply With Quote
Old 01-11-2010, 03:03 AM   #51
Elite Member
Thread Starter
iTrader: (10)
 
Join Date: Oct 2008
Location: Seattle, Wa
Posts: 1,780
Total Cats: 30
Default

Picture time!

First things first. These wont come with headphones. Nice onces can run into the hundreds of dollars, and I just cant swing that at a 50 dollar price point . Also of note, on the ones that I ship out, there wont be a battery clip, there will be a plug in for your cig lighter, I can accommodate if people want them battery powered though.



A shot of the volume adjustment ****. I opted to use the sturdier **** type pots instead of the cheesy round dial ones that are on most cheap electronics. I want these things to survive abuse.



For the record, the input jacks I'll be putting on the shipped copies will be the thru-mount type with a locknut for durability. Radioshit didn't have what I wanted and Fry's is like 45 minutes out of the way, so I made due with what I had on this one.



These clips are SOLID. I clamped it onto the top motor mount bolt and it didn't move at all, also there was no vibration related noise picked up. I'm positive that these will be absolutely adequate in 99% of cases. For those of you that want a permanent install solution, I'm going to be getting together with JayL & Stan of SKMetalworks here shortly to figure something out. I want the install to be as painless as possible and its a PITA to get wrenches down underneath the intake manifold without coming out bloody.



Finally...cat pictures

Gia


Oliver (normally doesn't look this evil)


Oh, and to answer the fellow about the sound samples containing knock, you are right, there is no knock in that sample. I just need to stop being a ***** and induce some knock on my engine to get a clip. Up to this point, my concern was that due to the software I was using to record the sound clips I couldn't record and listen at the same time, so if I was knocking I could potentially go for a while without knowing (which would obviously suck).

To remedy this, I went out and bought a splitter for the output so I can listen and record at the same time ( and before anyone points it out, yes...I could have just wired in another headphone jack. You were paying attention when I said RadioShit was out right?) I'll try to get actual knock samples as soon as I can.
Jeff_Ciesielski is offline   Reply With Quote
Old 01-11-2010, 08:30 AM   #52
Elite Member
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

Is there color options on the box? I would like pink or turquoise.
SKMetalworks is offline   Reply With Quote
Old 01-11-2010, 09:39 AM   #53
Senior Member
iTrader: (4)
 
Join Date: Nov 2009
Location: Toronto, ON
Posts: 1,479
Total Cats: 6
Default

Sweet, thanks for the answer.

How fast can you pump these bad boys out?
dgmorr is offline   Reply With Quote
Old 01-11-2010, 10:32 AM   #54
Elite Member
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

I would really like a permanent solution if you can work one. Ideally I would like a system that can connect to this:


Since I left mine on the car when I sold my LINK

How does everyone feel about permanent vs clip?

Also, how does the long gray wire connect to the box or the clip. If it's permanent it will be difficult to pass the box or the large clip through the firewall for install.

Any other suggestions for the best way to permanently mount this? The above sensor may not be the best solution. I'd like peoples input.

Jeff, great work. This is really fantastic. It's something that we can all benefit from and you've really seen it through. Thanks! I can't wait for a final release. My money is ready and waiting to be sent.
miatauser884 is offline   Reply With Quote
Old 01-11-2010, 11:20 AM   #55
Elite Member
Thread Starter
iTrader: (10)
 
Join Date: Oct 2008
Location: Seattle, Wa
Posts: 1,780
Total Cats: 30
Default

Quote:
Originally Posted by djp0623 View Post
I would really like a permanent solution if you can work one. Ideally I would like a system that can connect to this:


Since I left mine on the car when I sold my LINK

How does everyone feel about permanent vs clip?

Also, how does the long gray wire connect to the box or the clip. If it's permanent it will be difficult to pass the box or the large clip through the firewall for install.

Any other suggestions for the best way to permanently mount this? The above sensor may not be the best solution. I'd like peoples input.

Jeff, great work. This is really fantastic. It's something that we can all benefit from and you've really seen it through. Thanks! I can't wait for a final release. My money is ready and waiting to be sent.
Let me try to get my hands on a knock sensor to test it out with. The amp currently uses a small mic as an input and the circuit would be slightly different with a piezo based element. Also, what you would hear would be completely different. Right now its somewhat like an electronic stethoscope, IMO with a piezo sensor everything tends to sound more...."plinky"(for lack of a better term) which might make it harder to differentiate knock from other sounds. I'm not against doing it if thats what people want, but it would change things up a bit.

Oh, and I'm probably going to add another mic jack to the input cable to ease install .
Jeff_Ciesielski is offline   Reply With Quote
Old 01-11-2010, 11:26 AM   #56
Elite Member
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Quote:
Originally Posted by Jeff_Ciesielski View Post
Let me try to get my hands on a knock sensor to test it out with. The amp currently uses a small mic as an input and the circuit would be slightly different with a piezo based element. Also, what you would hear would be completely different. Right now its somewhat like an electronic stethoscope, IMO with a piezo sensor everything tends to sound more...."plinky"(for lack of a better term) which might make it harder to differentiate knock from other sounds. I'm not against doing it if thats what people want, but it would change things up a bit.

Oh, and I'm probably going to add another mic jack to the input cable to ease install .
Forget about using the piezo sensor. This is out of my element so I didn't realize what I was asking. Keep going in the direction you are working. I will adapt to your work. I'd still like a permamnent install solution. Thanks
miatauser884 is offline   Reply With Quote
Old 01-11-2010, 11:49 AM   #57
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

I'm in love with this.

Definitely like the idea of a mic jack for the input...and up for a permanent install option.
gospeed81 is offline   Reply With Quote
Old 01-11-2010, 12:23 PM   #58
Elite Member
Thread Starter
iTrader: (10)
 
Join Date: Oct 2008
Location: Seattle, Wa
Posts: 1,780
Total Cats: 30
Default

Quote:
Originally Posted by djp0623 View Post
Forget about using the piezo sensor. This is out of my element so I didn't realize what I was asking. Keep going in the direction you are working. I will adapt to your work. I'd still like a permamnent install solution. Thanks
Permanent install looks like a must have for quite a few people so its definately on the to-do list. I really would like to try it out with a knock sensor though. I know that some people have used a KnockSenseMS to drive their speakers before so if its been done, its worth looking into. Plus, I'm just curious as to the difference between a knock sensor and a raw piezo disk in terms of sound output .
Jeff_Ciesielski is offline   Reply With Quote
Old 01-11-2010, 11:48 PM   #59
Junior Member
 
Join Date: Dec 2009
Location: Shelbina, MO (North East)
Posts: 335
Total Cats: 0
Default

I'm interested but am waiting for feedback on the first units. I am in no hurry as the weather has my car stored in the garage. Sounds like a great product.

Thanks!
rweatherford is offline   Reply With Quote
Old 01-12-2010, 10:19 AM   #60
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,680
Total Cats: 1,561
Default

I wouldn't delay production chasing knock sensor compatibility. Knock sensors have already proven themselves to provide false readings so much of the time. It sounds like you are already ready for production so I wouldn't hesitate to get them out. Good job, by the way.
sixshooter is online now   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
NB oil pressure gauge runs backward TorqueZombie Engine Performance 7 10-11-2015 07:10 AM
MS PNP requires reading and following directions??? satisfied MEGAsquirt 141 10-06-2015 11:44 AM
Run boost gauge from ECU MAP? Itty MSPNP 6 09-22-2015 12:02 PM
Project DDoS: '99 "Budget" boost build ProjectDDoS Build Threads 1 09-09-2015 02:52 PM


Tags
knock sensor

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 03:00 PM.