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rotorhead's Avatar
 
Join Date: Jul 2003
Location: Port Macquarie Australia
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930 EFI - Ignition question

Just got my 930 back from having the new EFI tuned at the local dyno. I admit that the car drives pretty much the same as it did before I EFI'd it.

The max TQ/HP that it was producing on the dyno is still below the factory figures for a stock 930 engine. I am a bit worried that there might be some other issue (Like cam timing).

One thing I did notice was that there is a LOT of ignition advance now. There is 37deg at 3000rpm. I have checked the cam timing twice before, should I do it again?

I am open to suggestions and ideas.

Steve
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Old 03-10-2007, 05:37 PM
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Curious, are you still running the factory intake manifold, or Carrera manifold?
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Merv
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Old 03-10-2007, 06:30 PM
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what? me worry?
 
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Something is not right...

but we also need more info regarding your engines set up
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Old 03-10-2007, 06:36 PM
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Hi Steve,

Something must be wrong if you don't notice a difference with the EFI. My motor put out maybe 50 more hp with EFI. But I did change a few things at the same time.

Is that 37 deg advance at cruise or WOT. At cruise I run about 44 degs and at WOT about 25 degs.
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911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 03-10-2007, 06:47 PM
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Thanks guys..

here is the setup I'll post a pic when I get home today.

Goingsuperfast EFI Kit
Wasted Spark EDIS system
55lb Siemens Low impedance Injectors
36-1 Trigger wheel
Factory 930 Intake manifold - Billet Injector Blocks
Factory Intercooler
Factory Diverter Valve
Innovate LC-1 Wideband
EMS Stinger ECU
K27-7200 Turbo
Aftermarket Exhaust


That 37deg is at cruise. I'll post the ignition map tonight.
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Old 03-10-2007, 07:02 PM
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Steve

What cams?

Are you twin plugged or single?
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Dean
911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 03-10-2007, 07:13 PM
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Quote:
Originally posted by dean
Steve

What cams?

Are you twin plugged or single?
Sorry...

Stock Cams
Single Plugged
Ford EDIS CoilPack
0.8 bar boost
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Old 03-10-2007, 07:29 PM
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Quote:
Originally posted by rotorhead

Goingsuperfast EFI Kit
Wasted Spark EDIS system
55lb Siemens Low impedance Injectors
36-1 Trigger wheel
Factory 930 Intake manifold - Billet Injector Blocks
Factory Intercooler
Factory Diverter Valve
Innovate LC-1 Wideband
EMS Stinger ECU
K27-7200 Turbo
Aftermarket Exhaust

It's the item above listed as K27-7200 Turbo. You got all the right pieces to put out over 500BHP, but the turbocharger will only flow 450-475BHP on a good day. Install a HF or S or Garrett GT35 and you will see a marked improvement.
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Old 03-11-2007, 08:08 AM
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I was a bit dissapointed whan I changed the 3DLZ for the K27-7200, I noticed a bit of an earlier spool but it missed the rush of the 3DLZ when it came on boost.

I have recently purchades a TIG welder and I would consider doing some fabrication and installing a GT35.

Has anyone else reading this done this?
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Old 03-11-2007, 03:00 PM
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If I were you I would change the cams and build a big ass intercooler with you new tig welder.

Also what dyno are you using?
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Dean
911 SC turbo, 3.0L 930 motor, G50, 930 brakes, DTA EFI, 352 RWHP DynoDynamic dyno,
Old 03-11-2007, 05:14 PM
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My 2 cents... 37 degree at cruise seems to be very high.
I think even the NA cars only runs 32-33 degree max?
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Old 03-12-2007, 05:52 AM
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If your HP/TQ values are truly below the factory specs with that setup, then I think you do have an issue.

Mike (mppickett ) has a spark table that advances his EDIS/Megasquirt ignition to as high as 36 degrees but only over a very short range during acceleration.

You may already know this, but you cannot use the timing lights with the selectable advance on EDIS systems. This will give you a faulty reading. You have to set the light to zero degrees and then read the advance using the pulley markings.
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'79 930 US

Last edited by TurboBert; 03-12-2007 at 08:29 AM..
Old 03-12-2007, 08:23 AM
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