427 engine (part 2) - RHS block - Page 110

**Rich Z** · 11-21-2011, 12:52 AM

Quote:

Originally Posted by 85vette

That engine looks massive! I'd love to hear that thing run!

Maybe tomorrow I'll start it up and take some video of idle and some light revving of the engine. It does sound pretty good.

Plus Connie said she saw some smoke from the tail pipes when I left Aaron's place on Friday. I want to see if any smoke is visible in that rpm range where there seems to be misfires or something odd going on.

**Rich Z** · 11-21-2011, 12:53 AM

Quote:

Originally Posted by Benjamin

IIRC it is an Aeromotive A-1000 or the newest (well back then) equivalent.

If nothing else you can use the factory fuel pump wiring to control a relay that turns the Aeromotive on and off. that way if the inertia switch is activated in an accident then the pump will cut off.

I wonder why neither Harwood nor Aaron chose to go that route? Seems like that would have been the reasonable way to go about it.....

**Rich Z** · 11-21-2011, 02:12 AM

Well, I think this explains why misfires (if they are taking place) are not showing up in the error code log. Got someone looking into the tune file and he told me about this one...

**Rich Z** · 11-21-2011, 02:18 AM

To explain what the above image means, "SES" means the Service Engine Soon" indicator on the DTC display. The various codes in the Error Mode column mean:

0 - MIL on First Error: Illuminates MIL the first time DTC sets.
1 - MIL on Second Error: Illuminates MIL if fault is active for 2 consecutive driving cycles.
2 - No MIL Light: Does not illuminate MIL, but will illuminate SERVICE light.
3 - No Error Reported: Does not illuminate MIL or SERVICE light.

"MIL", by the way, means Malfunction Indicator Lamp.

So I guess I am puzzled. Why was this completely turned off if misfires were suspected? Hopefully I can get a new license to compensate for the replaced PCM from HPTuners so I can turn this indicator back on to see what I get.

Benjamin · 11-21-2011, 11:13 AM

Quote:

Originally Posted by Rich Z

I wonder why neither Harwood nor Aaron chose to go that route? Seems like that would have been the reasonable way to go about it.....

I think Harwood was in "Racecar" mode and wired it as it would normally be (minus any kind of safety switches that any normal sanctioning body would require). Aaron was in the "if it ain't broke don't fix it" mode.... and can you really blame him, BUT if he did go this far into the build I would think he might should have wired it through the inertia switch at least, but I am no mechanic by trade so what do I know....

Benjamin · 11-21-2011, 11:17 AM

BTW, i thought you were getting OEM coils installed and ditching the MSD coils?

Benjamin · 11-21-2011, 11:20 AM

and one more thing, can you please let me know how the coating is holding up on the turbo's? IF i need to touch them up from any handling / installation damage I will. I would also like some pictures installed for my website if I can get some.

**Rich Z** · 11-21-2011, 01:12 PM

Quote:

Originally Posted by Benjamin

BTW, i thought you were getting OEM coils installed and ditching the MSD coils?

That is what Aaron told me. I was surprised to see the MSD coils still on there when he popped the hood open.

**Rich Z** · 11-21-2011, 01:14 PM

Quote:

Originally Posted by Benjamin

and one more thing, can you please let me know how the coating is holding up on the turbo's? IF i need to touch them up from any handling / installation damage I will. I would also like some pictures installed for my website if I can get some.

Well, since the time you coated the turbos, they were sent off and rebuilt as well has having larger housings put on them. So they came back just cast iron, and of course are all rusted up now. I'll probably just clean them up with a rust remover and paint them with high temp header paint one of these days.

Thanks for asking about them...

**Rich Z** · 11-21-2011, 07:53 PM

I talked to Aaron on the phone today and asked him about the misfires being blocked out of the tune. He said they needed to do that because of the camshaft. The overlap causes issues that will trigger false misfire readings.

He's going to order some longer coupling hoses for the turbo pipes so he can fix that one extending into the quarter panel wheel well. I commented about the apparently overly rich AFR in low RPM levels, so he said he would ask Jim Smith about this when he comes up next week.