[Gmecm] BIG CAM TUNING ON MAP

Sat Jun 18 00:25:22 UTC 2005

ok thanks for the help but do i just guess at how much advance and fuel to add?

 --- On Fri 06/17,  < Djfreggens at aol.com > wrote:
From:  [mailto: Djfreggens at aol.com]
To: gmecm at diy-efi.org
Date: Fri, 17 Jun 2005 19:28:09 EDT
Subject: Re: [Gmecm] BIG CAM TUNING ON MAP

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=US-ASCII">
<META content="MSHTML 6.00.2800.1498" name=GENERATOR></HEAD>
<BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial" 
bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document 
face=Arial color=#000000 size=2>
<DIV>
<DIV>?</DIV>
<DIV>? i normally dont reply but i am today. WTF are you talking about ? 
ive tuned sevral small blocks with very large camshafts with no trouble unless 
there was excessive overlap like more then 24degrees or so. youll need to work 
almost every table in the ecm. youll need to rework fuel and spark and all of 
the accel enrich tables along with the idle conditioners. first things first 
start with the fuel tables. then work spark. start conservative and dont be 
surprised if the engine needs lots of spark advance dont in the low rpm low map 
areas. </DIV>
<DIV>?</DIV>
<DIV>?</DIV>
<DIV>?</DIV>
<DIV> </DIV>
<DIV>?</DIV>
<DIV>In a message dated 6/17/2005 6:38:52 P.M. Eastern Standard Time, 
dvfagan at yahoo.com writes:</DIV>
<BLOCKQUOTE 
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT 
  style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 
  size=2>Zach,<BR>People with a "HUGE RACING CAM" don't generally tune. 
  <BR>Without decent manifold vacuum, all they generally do<BR>is set the 
  temperature to enter closed loop to 255<BR>degrees (forcing open loop). Then 
  they mechanically<BR>advance timing till the knock detector retard 
  becomes<BR>annoying.? The O2 sensor controls closed loop<BR>operation and 
  can be ignored.? Mechanically adjust<BR>your fuel pressure up until you 
  see black smoke out<BR>the back. Have fun and go burn some 
  fuel!!<BR>Dennis<BR><BR>--- zach <fateo6 at excite.com> wrote:<BR><BR>> 
  <BR>> <BR>> HI I CAN QUIET FIGURE OUT HOW TO TUNE FOR A BIG CAM<BR>> 
  ON A MAP SYSTEM. IM RUNING A 730 ECM WITH A $58 CODE<BR>> BUT I HAVE A HUGE 
  RACING CAM AND I DONT KNOW WHAT<BR>> TABLE(S) TO MODIFY OR HOW I GO ABOUT 
  THAT; IS THE A<BR>> MATH FORMULA I SHOULD START WITH? <BR>> THANKS 
  <BR>> ZACH<BR></FONT></BLOCKQUOTE></DIV>
<DIV></DIV>
<DIV>?</DIV></FONT></BODY></HTML>
<p>_______________________________________________<br>Gmecm mailing list<br>Gmecm at diy-efi.org<br>http://lists.diy-efi.org/mailman/listinfo/gmecm<br>

_______________________________________________
Join Excite! - http://www.excite.com
The most personalized portal on the Web!