How to make and install a det can
 

I know this has been covered before but i made a how-to while making my det can so i just thought i'd share. its permanently hosted on my website at:

http://www.lukekailburn.com


The parts
http://www.lukekailburn.com/media/en...n/100_2755.jpg


<b>building the engine block side:</b>

-Take your 4-5" peice of copper and using a vice grip or other means, flatten a good 1" to 1.25" section of the pipe.

-Now take 1/8" of the tip and bend it 90*. You are trying to seal off the end of the tube. Drill a hole just large enough for the bolt in the flattened part of the pipe.

-Solder the 1/2" threaded fitting onto the end of the pipe, and also solder shut the flattened bent tip.

-Take some teflon tape and wrap the 1/4" barbed fitting and screw it into the pipe fitting.

Here is what the engine block side of the det can will look like
http://www.lukekailburn.com/media/en...n/100_2765.jpg
http://www.lukekailburn.com/media/en...n/100_2766.jpg
http://www.lukekailburn.com/media/en...n/100_2767.jpg

run your 1/2" hose through the firewall and into the cabin
http://www.lukekailburn.com/media/en...n/100_2768.jpg

Bolt the block side of the det can to the block. Connect the hose to the block fitting.
http://www.lukekailburn.com/media/en...n/100_2770.jpg

You have an option here, you can:

-T the 1/2" hose and run two lines, 1 to each side of the ear protectors.
-just run the single line to one side of the ear protectors.


I chose to just run the single hose to one side of the ear protectors for simplicity and to save money.



Drill 1/2" hole in your ear protectors
http://www.lukekailburn.com/media/en...n/100_2771.jpg

Shove 1/2" of the tubing into the ear protectors and seal it with duct tape. The tape allows you to disconnect the ear protectors and remove the det can when finished. Another option would be super glue or hot glue. this would seal better than ductape but I'll see how this setup works.
http://www.lukekailburn.com/media/en...n/100_2772.jpg

An overall shot of the setup
http://www.lukekailburn.com/media/en...n/100_2773.jpg


<b>congrats you have successfully built a det can. You can now listen to detonation to help you tune your timing on the streets</b>





enjoy,

-Luke

Re: How to make and install a det can
 

this is how i was gonna make mine

http://autospeed.drive.com.au/cms/article.html?&A=0353

Re: How to make and install a det can
 

------- nice!

Re: How to make and install a det can
 

Why didnt you run the line from the bottom of the ear muff part, instead of the side? Im using the same ear protectors form harbor frieght, how do they work?
good write up
LAST I vote for a sticky. ;)

Re: How to make and install a det can
 

I used 3/8" fuel line and it didn't work for ----, I might have to get some of that type of hose. I threaded a brass fitting into the muff, would that cause a problem?

Re: How to make and install a det can
 

setup works great! i can clearly hear my valvetrain ticking away, thats the most consistent sound. i only took it out for just a bit and around 4.5k i heard kind of what sounded like throwing hard rice into a pan :y could that be detonation? haha i think it might be

i need a driver, so i can sit and listen and focus closely

im glad you guys like the writeup

-Luke

EDITED

Re: How to make and install a det can
 

ur probably hearing the valvetrain not the injectors

Re: How to make and install a det can
 

edit oops, yah thats deff the ticking of the rockers haha

idk why i wrote injectors. i've got injector battery offsets in crome on my mind :P

-Luke

Re: How to make and install a det can
 

good ----!

Re: How to make and install a det can
 

sticky for a little bit 8)

Re: How to make and install a det can
 

sweet :thumbup:

-Luke

Re: How to make and install a det can
 

I always find your writeups useful. Thanks for taking the time to help out your fellow man. :y ;)

Re: How to make and install a det can
 

nice write-up... Ive been meaning to make one of these for awhile now.

Re: How to make and install a det can
 

Great post :-) i like the no electronics version. i'll have to give that a try. i can practice on my girlfriends na itb 20v 11:1 4age, cause even on 98ron/93aki, it pings quite a bit.

fred.

Re: How to make and install a det can
 

Re: How to make and install a det can
 

and the point of that "det can" wut does it do wut is it used for ?

Re: How to make and install a det can
 

it determines when to spell using the proper English language, you sound like a moron with your 6th grade e-slang

Re: How to make and install a det can
 

It isolates noise made by engine vibrations and amplifies them to your ears.

Basically lets you hear detonation much sooner than just plain cruising.

Re: How to make and install a det can
 

wut do you mean? :1

Re: How to make and install a det can
 

sorry to bring up an old thread, but i guess it shows that i've searched. lol

one problem i have is being able to hear anything in the car really. open downpipe/turbo makes it almost unbearable.


how do you guys do it ? i have some wallmart shooting ear protectors. i think they are like 28db.

Re: How to make and install a det can
 

can detonation get loud enough to hear over the engine without a set of cans...? it never really occurred to me that the "rattle" i keep hearing may be detonation....? and how do you tune it out if the car is already running rich if that is infact what it is

sorry to kinda steal ur thread man

Re: How to make and install a det can
 

Detonation, at the most simple level, is caused by too high of cylinder pressures resulting in an erratic, spontaneous conbustion starting elsewhere than the spark plug.

To decrease max cylinder pressure, you decrease compression, boost, or timing advance. It can also be related to heat of the combustion, as the heat from the spart moves as infrared heat. The actual flame front moves a few thousand kilometers per hour (highly compressed atoms), but infrared light moves at 1,079,252,848.8 km/h. This is reduced with a better intercooler, a more efficient turbo (or turning boost down to a more efficient level), or simply less timing.

Since the pre-ignition form of detonation can happen before the timing event, it can be pushing against the still-rising piston, reducing power. You can usually make MORE power by tuning out detonation

Re: How to make and install a det can
 

pre ignition and detonation are two TOTALLY different things.


if detonation is bad enough, you will be able to hear it with a "naked" ear.

Re: How to make and install a det can
 

Pre-ignition is the actual ignition event happening before the spark plug fires, even with a det-can you prolly cannot hear pre-ignition.

Detonation is the uncontrolled burning of the fuel/air charge causing a rapid "explosion" and extreme cyl. pressures rather than a nice controlled burn and even cyl. pressure. Detonation can be caused by pre-ignition but pre-ignition will not always result in detonation.

I made one of the electronic versions, i'll try and get a pic up, I havent got to play with it yet though on a car so I cant say how it works.

Re: How to make and install a det can
 

i made on of those too. it wasnt bad at idle but at wot it was crazy loud. no way in hell to distinguish different sounds.


i used that radio shack amplifier.

Re: How to make and install a det can
 

I used their whisperer 2000 or whatever they used, I got it off ebay for like $7. with that, dean connector, clamp, free cord it set me back like $15, not including the headphones which I bought a nice set, they were like $30 or somthing.

Re: How to make and install a det can
 

my creation ;D:
http://img265.imageshack.us/img265/8282/detcan01pr7.jpg
http://img521.imageshack.us/img521/8991/detcan02ft1.jpg
sorry for the crappy cellphone pics. My camera died.

I used an amped computer speaker I had laying around, a microphone out of a wired hands-free for a cell phone... and a little bit of inginuety... havn't tested it in the car yet, but it works great listening to noises around the room.

Features:
Volume control
Headphone Jack
Powered Speaker
alligator clip
USB powerd
A+ ghettoness

Parts/tools:
Amped Computer Speakers
mini-microphone (from headset, or hands free device)
9v battery + battery clip (from radio-shack)
Alligator Clip
solder
heat shrink tubing
optional cigerette-lighter plug from radioshack (mines usb powered, so im just gonna run it off laptop)

Overall Cost: 0-$10

How to build:
cut the jack off your computer speaker (the little 1/4 inch dealio that plugs into computer)
strip the wires back
twist the two sheilded wires together... (so you combine mono/stereo)
lengthen wire (I used an rca cable, as it is basically identical inside, minus the extra stereo wire

tear apart your hands-free device like its been naughty on christmas...
find the little speaker inside
desolder it
solder one end to "red" battery clip lead, and other to bare wire on computer speaker
solder the sheilded/coated wire on computer speaker to the "black/negative" battery clip lead
hot-glue or crimp your mic to your alligator clip
heat shrink everything to tidy up, and you're done.

lemme know what you think.

Re: How to make and install a det can
 

nice to see others trying to build their own setups.
hope my thread helps you guys

-Luke