Forced Induction Supercharger/Turbocharger

Single T76 LT1 Just Back from the Dyno-

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Old Sep 30, 2008 | 09:10 PM
  #31  
DirtyDaveW's Avatar
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From: Upstate New York,USA
Thanks. I love my setup. With the 4.10's, sixth gear is actually usuable from 45 on up and once you're at 55mph, you can actually accelerate in 6th. I can shortshift (shifting at 3K) pretty briskly, never spinning, and just murder the other cars around me, all off boost. Gas mileage seems to be in the 20mpg range with balanced driving of roughly half stop and go and half freeway on my 2x mile commute each way to/from work. I'm running Walmart and Kroger 93 octane, no methanol/alky/water injections.

Originally Posted by c0rey
Well I thought I was getting outta boost doing the ls1 swap but I cant. I just put 4.11s in my m6, and I was wondering how you are liking yours? Running a mp t70 again. I dont want to lag.
Old Oct 3, 2008 | 11:16 PM
  #32  
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Originally Posted by DirtyDaveW
So far, I will stay with the MAF. I'm really pretty satisfied with the AFR numbers I'm seeing during cruise and WOT even though it's running in Open Loop full time..... I've been tempted to go to Speed Density with a designated 2 BAR MAP sensor but I've read several accounts where users of that method have a consistent and elusive problem with a "tip in" stumble.....
Dave, just curious what AFR numbers you are getting with the MAF in SD mode.. I have mine between 14-14.9 running only on a 2bar MAP.. no 02's or MAF. BTW, tip-in stumble was cured by lowering the injector constant and leaning out the SD tables (since there is no accel pump table in LT1 Edit or TunerCat).

It's getting colder now and curous how temp will affect the AFR's.
Old Oct 4, 2008 | 02:02 PM
  #33  
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My wide band at cruise whether 35 or 75 mph shows 13.5 to 14.0. At WOT I'm showing 11.5.

I do have a kind of weird plug condition when I pulled them. All 4 on the drivers side are perfect and clean. On the other hand, all 4 of the passenger side are consistent in color but are kind of crummy looking. I don't know if this is a result of the log manifold design difference from one side to the other or what. I'm not losing/burning coolant or burning oil. The car runs great.


Originally Posted by dookie454
Dave, just curious what AFR numbers you are getting with the MAF in SD mode.. I have mine between 14-14.9 running only on a 2bar MAP.. no 02's or MAF. BTW, tip-in stumble was cured by lowering the injector constant and leaning out the SD tables (since there is no accel pump table in LT1 Edit or TunerCat).

It's getting colder now and curous how temp will affect the AFR's.
Old Oct 6, 2008 | 10:39 PM
  #34  
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Originally Posted by DirtyDaveW
My wide band at cruise whether 35 or 75 mph shows 13.5 to 14.0. At WOT I'm showing 11.5.

I do have a kind of weird plug condition when I pulled them. All 4 on the drivers side are perfect and clean. On the other hand, all 4 of the passenger side are consistent in color but are kind of crummy looking. I don't know if this is a result of the log manifold design difference from one side to the other or what. I'm not losing/burning coolant or burning oil. The car runs great.

strange about the plugs, I wonder if it has something to do with the individual cyl fuel trim, since the wideband averages both sides. Im afraid to pull mine I just dont want to know what's going on in there, it runs good so I'll leave it alone.

Im cruising around 13.7-14.2ish as well so I guess this is ok.. I didnt know how close to 14.5 we need to be or if it even makes a difference.

Thanks
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