[Diy_efi] Newbie questions on spark and PE tables
Bret Levandowski
skishop69 at yahoo.com
Tue Feb 15 14:00:40 GMT 2005
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It's an '85 3/4 ton Sub. I'm using the BB TBI with the 5.7l PI injectors.
Frank McCracken <frankmccracken at shaw.ca> wrote:Ski;
It sounds like you have almost the same combo as me. TBI? Light or heavy car? My intake is just a performer. I am waiting for a Holley 502-6 TB. I have not run my car thru the gears yet, but going down the road in 1st-2nd gear it runs and goes like hell with my stock TB with the usual mods. AdjFP, Inj Spacer, "Massaged" ventury top. Just getting to the point of building my interface cable, so I will be following this thread with great interest.
Frank.
----- Original Message -----
From: Bret Levandowski
To: diy_efi at diy-efi.org
Sent: Monday, February 14, 2005 7:40 PM
Subject: [Diy_efi] Newbie questions on spark and PE tables
Short background... I am a GM driveability tech but have ZERO knowledge of the programming aspect of EFI. I am running a '78 SB 400, CR9.5:1, 1.94/1.6 mildly ported heads, mild RV cam (don't have the specs on me), headers and an Edlebrock Airgapper intake. I'm using RT Tuner from C.A.T.S. and the Moates Autoprom. I have success in setting up my VE tables so my 'normal' driving conditions are fine. My problem is when I hammer the throttle for PE mode. When I had my 750 Edelbrock, it would go like scalded dog. Now, it just seems to bog. I've had it on the freeway with the emulator and adjusted the PE AFR form the point of billowing black smoke to loss of acceleration. Nothing in between seems to change the 'bog' it has. I haven't messed with the spark tables yet. I'm trying to tune one table at a time. More fuel, more spark; more MAP, less spark; I honestly don't know where the heck to start. Since my chip was originall prog'd by someone else (who didn't listen to anything about the
running conditions and data I was giving him). I've managed to iron out all the VE mistakes, now on to the rest. I need someone whose willing to help me learn. I'm told, this is the place. Thanks, Ski
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<DIV>It's an '85 3/4 ton Sub. I'm using the BB TBI with the 5.7l PI injectors.<BR><BR><B><I>Frank McCracken <frankmccracken at shaw.ca></I></B> wrote:
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<DIV><FONT face=Arial size=2>Ski;</FONT></DIV>
<DIV><FONT face=Arial size=2>It sounds like you have almost the same combo as me. TBI? Light or heavy car? My intake is just a performer. I am waiting for a Holley 502-6 TB. I have not run my car thru the gears yet, but going down the road in 1st-2nd gear it runs and goes like hell with my stock TB with the usual mods. AdjFP, Inj Spacer, "Massaged" ventury top. Just getting to the point of building my interface cable, so I will be following this thread with great interest. </FONT></DIV>
<DIV><FONT face=Arial size=2>Frank.</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B> <A title=skishop69 at yahoo.com href="mailto:skishop69 at yahoo.com">Bret Levandowski</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=diy_efi at diy-efi.org href="mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, February 14, 2005 7:40 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Diy_efi] Newbie questions on spark and PE tables</DIV>
<DIV><BR></DIV>
<DIV>Short background... I am a GM driveability tech but have ZERO knowledge of the programming aspect of EFI. I am running a '78 SB 400, CR9.5:1, 1.94/1.6 mildly ported heads, mild RV cam (don't have the specs on me), headers and an Edlebrock Airgapper intake. I'm using RT Tuner from C.A.T.S. and the Moates Autoprom. I have success in setting up my VE tables so my 'normal' driving conditions are fine. My problem is when I hammer the throttle for PE mode. When I had my 750 Edelbrock, it would go like scalded dog. Now, it just seems to bog. I've had it on the freeway with the emulator and adjusted the PE AFR form the point of billowing black smoke to loss of acceleration. Nothing in between seems to change the 'bog' it has. I haven't messed with the spark tables yet. I'm trying to tune one table at a time. More fuel, more spark; more MAP, less spark; I honestly don't know where the heck to start. Since my chip was originall prog'd by someone else (who didn't listen to
anything about the running conditions and data I was giving him). I've managed to iron out all the VE mistakes, now on to the rest. I need someone whose willing to help me learn. I'm told, this is the place. Thanks, Ski</DIV>
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