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along the rear edge of the front bumper cover their should be a strip of metal,
then its screwed on top of the bumper covers edge.
Good eye Steve ,
and very helpful with the pictures
Subscribing....but need to go back to read the details.
Miss those phone dials on my old/former Euro!
Seems like you could ohm out the sensor and then the wire or gauge to see whether the PC interrupting ground is an issue?
Could always try an interim supplemental ground strap, to see if that helps.
Oil at the AN fitting- could be just snug that up, I didn't see anything up on the scroll of the turbo. Though in the vid it did look like the oil pan gasket was pinched out in one spot, if that is seeping it might end up on the low hanging hardware in back.
I thought that the Speake chips needed to be tuned on the car, unless he is providing John with chips already mapped for the turbo application? Seems like a pretty narrow market that could have a wide range of needs to cover.
Mark replied to my questions about tuning without Dyno. Can't fully tune without a shark tuner and adding an adjustable fuel regulator. Anyone have any recommendations? (I'm also hoping Volla produces his replacement boards that can be tuned with his PC software.)
Mark wrote " you can "trim" the air/fuel via an adjustable fuel pressure regulator, to ensure you're at about 12:1 A/F ratio while on-boost. You should not be able to completely tune without a SharkTuner: which I once had access to & the interface for (came damaged from Speake). But fuel trimming while on-boost can be done by adjusting the fuel pressure up/down as-needed indicative of your measured AF ratio while on the dyno (or while driving). Start off in 2nd gear and make your first adjustment: if it goes above 13.5; stop your run and enrichen & then try agian. once you have 2nd gear mastered, then go for 3rd: closely watching the AF gauge. while in 3rd, if it goes richer than 13.3, stop the run and enriching (increase fuel pressure by screwing the set-screw in: 1/4 turn = 1psi fuel pressure increase). Once 3rd is mastered, then try 4th if you dare venture that fast ."
928MS, IIRC, provides a BEGI adjustable/rising rate regulator with one or more of the supercharger kits. I had one in-hand before for my old 3000GT VR4, but never installed. Good build quality-- but that brings to mind that they can take their signal either from vacuum or pressure depending on the spec/part number, so watch that nuance.
Not sure what Victor/VCB uses for his S4 superchargers, either.
That tuning can be perilous, do you know whether you will be overdriving stock injectors' duty cycle or whether the injectors were already upgraded?
Trying to think of some places more proximate that would likely have the tuner and the tuning competency.
I'd keep this thread going, but also do some searches to hunt down some other 928 turbo owners and see if you can exchange info, pics and ideas to see what is similar and different. Only S4s are coming to my mind right now, so there may still be some improvisation required!
928MS, IIRC, provides a BEGI adjustable/rising rate regulator with one or more of the supercharger kits. I had one in-hand before for my old 3000GT VR4, but never installed. Good build quality-- but that brings to mind that they can take their signal either from vacuum or pressure depending on the spec/part number, so watch that nuance.
Not sure what Victor/VCB uses for his S4 superchargers, either.
That tuning can be perilous, do you know whether you will be overdriving stock injectors' duty cycle or whether the injectors were already upgraded?
Trying to think of some places more proximate that would likely have the tuner and the tuning competency.
I'd keep this thread going, but also do some searches to hunt down some other 928 turbo owners and see if you can exchange info, pics and ideas to see what is similar and different. Only S4s are coming to my mind right now, so there may still be some improvisation required!
Injectors were upgraded to 30Lb. Purchased them from Jegs at Marks request and had them drop shipped to Mark in 2013.
928MS, IIRC, provides a BEGI adjustable/rising rate regulator with one or more of the supercharger kits. I had one in-hand before for my old 3000GT VR4, but never installed. Good build quality-- but that brings to mind that they can take their signal either from vacuum or pressure depending on the spec/part number, so watch that nuance.
Not sure what Victor/VCB uses for his S4 superchargers, either.
That tuning can be perilous, do you know whether you will be overdriving stock injectors' duty cycle or whether the injectors were already upgraded?
Trying to think of some places more proximate that would likely have the tuner and the tuning competency.
I'd keep this thread going, but also do some searches to hunt down some other 928 turbo owners and see if you can exchange info, pics and ideas to see what is similar and different. Only S4s are coming to my mind right now, so there may still be some improvisation required!
If you are going this route, I've got a new in the wrapper one I've had for a very long time. $150.00 and it's yours.
I am going to get an adjustable FRP. Is it the special order one on 928 motorsports site for an 85 ? If so, I'll take it. If its another kit, will it require the fittings etc.. or do they come with the unit?
Looks Like the Diagnostic on cold start didn't change anything. The RPMs went from 1100 1000. Have to take it around the corner to warm it up wife hates the smell.
I would reach out to John Speake and confirm this, if you don't have LH chips for 30lb injectors, you will be chasing your tail for a long time trying to fix this.
I would also find out if it's just the LH modified for the larger injectors, or if the EZF was also changed to reduce ignition timing under boost.
03-01-2017, 07:22 PM
