How do you tune for detonation you cannot hear?
Thread Starter
Joined: Jan 2003
Posts: 1,080
Likes: 0
How do you tune for detonation you cannot hear?
I was wondering when you tune a built engine meanign forged pistons w/sleeved block, where the knock sensor may be dissabled, how does oen tune for detonation that is not audible?
I have heard that although it may not be audible, it could still cause damage. Do u guys just use the factory knock sensor after the engine is all warmed up?
I have heard that although it may not be audible, it could still cause damage. Do u guys just use the factory knock sensor after the engine is all warmed up?
Thread Starter
Joined: Jan 2003
Posts: 1,080
Likes: 0
Re: How do you tune for detonation you cannot hear? (Muckman)
Well im not sure if my p75 ecu is able to read my knock sensor, it might. Also it might read false knock cause of piston slap, but that might not be a prob if the engine is warmed up.
How does the stock knock sensor do in sensing knock?
How does the stock knock sensor do in sensing knock?
Member
Joined: Nov 2001
Posts: 5,272
Likes: 0
From: broke in the bay area, CA
Re: How do you tune for detonation you cannot hear? (MordecaiPSI)
Wouldn't the forged pistons have a little more slap/noise than the stock? Freaking out the stock sensor? I'm interested too (because I don't have a knock sensor 
)
)
Trending Topics
Joined: Oct 2002
Posts: 298
Likes: 0
From: Fort Walton Beach, FL, USA
Re: How do you tune for detonation you cannot hear? (MordecaiPSI)
Consider a J&S Safeguard for knock detection.(I know its expensive) It only listens for knock when the corrisponding piston gets within a certan Deg. of TDC. In other words it only listens for knock when its supposed to happen, and not all the time. Another listening device is here>> http://www.autospeed.com/cms/article.html?&A=0348 Its basicly a low wattage amplifier attached to a microphone. Just some suggestions.
Honda-Tech Member
Joined: Jan 2002
Posts: 4,337
Likes: 0
From: OCONUS
Re: How do you tune for detonation you cannot hear? (lazerus)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lazerus »</TD></TR><TR><TD CLASS="quote">i use a 15 dollar unit i make that has a clip that you attach to a bolt near the top of the block... works great for me :-)</TD></TR></TABLE>
can you tell me what this is and has it saved you when you are boosting? i need something like this......
can you tell me what this is and has it saved you when you are boosting? i need something like this......
Joined: Oct 2002
Posts: 298
Likes: 0
From: Fort Walton Beach, FL, USA
Re: How do you tune for detonation you cannot hear? (SiRkid)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiRkid »</TD></TR><TR><TD CLASS="quote">j&s is too sensitive...well for built motors it is.
too much other noise which would set it off</TD></TR></TABLE>
You can adjust the sensitivity of the unit so it won't detect the slap but they are a pricey option. Also in decreasing the sensitivy it would have a hard time detecting actual knock.
too much other noise which would set it off</TD></TR></TABLE>
You can adjust the sensitivity of the unit so it won't detect the slap but they are a pricey option. Also in decreasing the sensitivy it would have a hard time detecting actual knock.
Joined: Sep 2002
Posts: 1,969
Likes: 0
From: Where Geos Go Fast, 95355
Re: How do you tune for detonation you cannot hear? (dirtySOHC's)
it's basically a modified hearing amplifier from radio shack.
it works extremely well for tuning purposes... because any human is better than an electronic device as far as hearing goes. so you can be the judge if you are detonating or not...
i'll get some part numbers and post them here for you guys... it costs about 15-20 bucks total, and all you need is a soldering iron a small screwdriver, and electrical tape....
Brad
it works extremely well for tuning purposes... because any human is better than an electronic device as far as hearing goes. so you can be the judge if you are detonating or not...
i'll get some part numbers and post them here for you guys... it costs about 15-20 bucks total, and all you need is a soldering iron a small screwdriver, and electrical tape....
Brad
Member
Joined: Nov 2001
Posts: 5,272
Likes: 0
From: broke in the bay area, CA
Re: How do you tune for detonation you cannot hear? (Civtek)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civtek »</TD></TR><TR><TD CLASS="quote">a write up would be great... keep us updated 
</TD></TR></TABLE>
</TD></TR></TABLE>
Honda-Tech Member
Joined: Sep 2002
Posts: 2,720
Likes: 0
From: 90210, CA, usa
Re: How do you tune for detonation you cannot hear? (Civtek)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Civtek »</TD></TR><TR><TD CLASS="quote">a write up would be great... keep us updated </TD></TR></TABLE>
I need this device.
</TD></TR></TABLE>I need this device.
Thread
Thread Starter
Forum
Replies
Last Post
rice is nice
Tech / Misc
16
Feb 23, 2009 08:21 AM
detonating, detonation, h22a, hayabusa, hear, honda, js, listen, safeguard, stethoscope, tune, tuning
