RE: [Chevelle-list] Detonation question

[Brian Zack]

I hadn’t really started listening that closely till lately, so I didn’t notice if it was worse at high temp or not. Right now, my temps aren’t getting over 180. But, during the summer with the air on and sitting in traffic, it climbs to about 215-220. When I change the heads and cam this spring, I’m going to put on a high flow water pump and reduce the ratio for the summer along with water wetter. I wont have acces to my e-mail again till Monday, So Happy Thanksgiving.     Brian Zack '70 Chevelle Malibu mailto:brianz@dpsabq.com   -----Original Message----- From: yenkochevelle [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 26, 2003 4:48 PM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Detonation question   What temp. is engine running at? Do you have an accuate temp guage? Do you notice a difference when air temp is high vs low? ----- Original Message ----- From: Brian Zack To: The Chevelle Mailing List Sent: Wednesday, November 26, 2003 5:08 PM Subject: RE: [Chevelle-list] Detonation question   It is already at 32 degrees. 10 initial + 22 centrifugal. Doesn’t the vacuum advance help with gas mileage? It does sound like maybe the vacuum advance is too much. Is that why you said to disconnect it for now? I have tried premium and it didn’t make much difference. I think I’ll try a few of the things mentioned here both separately and together and see what happens. Thanks all for the knowledge and help on this There is a really great knowledge base here. Hope everyone has a great Thanksgiving and GOD Bless!     Brian Zack '70 Chevelle Malibu mailto:brianz@dpsabq.com   -----Original Message----- From: Capt Crunch [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 26, 2003 1:59 PM To: Chevelle List Subject: Re: [Chevelle-list] Detonation question   Too much advance Brian... like Clint said pull the total back to the 32-36 degree area. I would say more like 32 if you want to run your current fuel.   First thing first brian disconnect the vac advance for now cause it will make no difference at WOT or for total advance. I assume your engine is liking 10 degrees inital timing more then 6 or 8 degrees? If that is the case leave it at ten. Then change your centrifugal to get you total advance (initial + centrifugal) to equal 32 degrees. Hope this helps   Mikey       ----- Original Message ---- From: Brian Zack Sent: Wednesday, November 26, 2003 2:24 PM To: The Chevelle Mailing List Subject: RE: [Chevelle-list] Detonation question   Yes, it seems to do it taking off from a start up hill a little heavy footed and when accelerating without downshifting. OK, Dumb question. Do I need more or less timing? It's been a long, short week. Brian Zack '70 Chevelle Malibu mailto:[EMAIL PROTECTED] -----Original Message----- From: Tom and Sue Tomlinson [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 26, 2003 1:05 PM To: The Chevelle Mailing List Subject: RE: [Chevelle-list] Detonation question Your original post said the detonation occurred under load. If this is the case, changing the vacuum advance may not help since it will not be kicked-in under load. In that case, you need to change the initial (damper) advance, and/or total advance by the springs and weights (or the advance curve). Tom Tomlinson -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Brian Zack Sent: Wednesday, November 26, 2003 2:11 PM To: The Chevelle Mailing List Subject: RE: [Chevelle-list] Detonation question 10 degrees at damper + 22 at weights and springs (I think) + 16 vacuum advance. That is where I got 48. Is that not correct? Is total not including vacuum too? Brian Zack Structural Technician mailto:[EMAIL PROTECTED] Dekker/Perich/Sabatini architecture  interiors  planning  engineering 505.761.9700  fax 505.761.4222. Visit our Website at www.dpsabq.com -----Original Message----- From: Clint Hooper [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 26, 2003 11:51 AM To: The Chevelle Mailing List Subject: Re: [Chevelle-list] Detonation question How much initial advance did you say the engine has? Clint Hooper H&H Custom,owner LT5 Registry Director http://www.LT5Registry.net/ ACES #1650 http://dalesplace.com/misc/friends/clint_hooper.htm ----- Original Message ----- From: "Brian Zack" <[EMAIL PROTECTED]> Where would you suggest taking it out of? Weights and springs? Vacuum advance? Or initial? Or a little out of each? Brian Zack '70 Chevelle Malibu mailto:[EMAIL PROTECTED]