Re: [Amc-list] detonation

[Greg Taylor <amundaza@xxxxxxxxx>]

Keith,
Your carb might not be tuned correctly for the added load of 'driving' instead of the dyno run.  I would suggest getting a Gunson Colortune (clear spark plug) and put it in No.1 cylinder and tune the engine for all RPMs with it (and remove when done tuning).  Then go for a drive.  IF you still have ping, try installing a simple water injection setup ... should help A LOT with ping.
 
http://website.lineone.net/~da.cushman/misc/mannject.html - Water Injection from Down Under
 
http://www.kuratrading.com/PDF/WaterInj.pdf - PDF downloadable version
 


Sincerely,
Greg Taylor :) <><

And the testimony is this, that God has given us eternal life, and this life is in His Son. He who has the Son has the life; he who does not have the Son of God does not have the life. - 1 John 5:11-12

--- On Tue, 6/24/08, Keith Evenson <epd@xxxxxxxxxxxx> wrote:

From: Keith Evenson <epd@xxxxxxxxxxxx>
Subject: [Amc-list] detonation
To: AMC/Rambler@xxxxxxxxxxxxxxxx, owners@xxxxxxxxxxxxxxxx, "drivers and fans." <amc-list@xxxxxxxxxxxx>
Date: Tuesday, June 24, 2008, 12:14 PM

So this is the deal. As some of you may remember, I just had my 390  
rebuilt and it dyno'd best with the timing at about 36 degrees adv.  
at 2500 rpm. Since I got it in the car I have been having some  
detonation issues. I was running 92 oct. (which is what I used at the  
dyno) and in the car it runs great but when I put it under some load  
it has what I am calling detonation. I have lower the timing a bit to  
about 34 degrees and I have used the NOS brand octane boost. Still  
getting the detonation. Yesterday I went to the local airport and put  
in 6 gal of 100 octane with the rest of the tank filled with 92. I am  
still getting the noise but it is not as bad. So should I go to a  
50/50 mix or try lowering the timing more or is there something else  
anyone can suggest? I have run it with the vacuum advance  
disconnected and still getting it.
I have this great new motor and I can only run it about 1/2 to 3/4  
throttle so I want to DRIVE my car not just put around in it.
HELP!
Thanks,

Keith Evenson




-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://splatter.wps.com/pipermail/amc-list/attachments/20080624/b2b9f8fe/attachment.htm

_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://splatter.wps.com/pipermail/amc-list/attachments/20080624/67e34e73/attachment.htm 
_______________________________________________
Amc-list mailing list
Amc-list@xxxxxxxxxxxx
http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list