[Diy_efi] Newbie questions on spark and PE tables

[Bret Levandowski]

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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>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.&nbsp; I have success in setting up my VE tables so my&nbsp;'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><p>
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