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Need Help With Turbo Tune (Tune and Log Inside)

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Old Dec 23, 2008 | 08:17 PM
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Default Need Help With Turbo Tune (Tune and Log Inside)
I have a 370 cubic inch InconTT car. Car has a small cam and is on 10lbs of boost. I had the WOT tuning done at a local shop and the car made good power for a break in "safe" tune. My problem is that the car breaks up badly at 3500-4000 rpms. I dont have a wideband on the car and the AFR on the dyno was 11.5 WOT. The car is also getting KR and I dont know why. Also, I have 2 intank Walbro 255s and 60lb injectors and the car is running out of fuel. The pumps are wired together, so they're working constantly. The car is on a 1Bar SD tune right now. Car was tuned with Efilive. Can anyone look over the tune and see if they can find anything. Any help greatly appreciated.

Thanks
Attached Files
File Type: efi
Log_0005.efi (100.0 KB, 81 views)
File Type: tun
Vengeance InconTT_1.tun (470.4 KB, 125 views)
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Old Dec 24, 2008 | 08:15 AM
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And, the FP is?? [Just because there's 2 pumps, who knows if both are running.]
If the car ran OK on the dyno, and now doesn't, something mechanical has occurred. [Unless you have changed the tune].
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Old Dec 24, 2008 | 08:43 AM
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Originally Posted by 1999ssls1
I have a 370 cubic inch InconTT car. Car has a small cam and is on 10lbs of boost. I had the WOT tuning done at a local shop and the car made good power for a break in "safe" tune. My problem is that the car breaks up badly at 3500-4000 rpms. I dont have a wideband on the car and the AFR on the dyno was 11.5 WOT. The car is also getting KR and I dont know why. Also, I have 2 intank Walbro 255s and 60lb injectors and the car is running out of fuel. The pumps are wired together, so they're working constantly. The car is on a 1Bar SD tune right now. Car was tuned with Efilive. Can anyone look over the tune and see if they can find anything. Any help greatly appreciated.

Thanks
this could be your problem...1 bar is only good for about 7.5psi. id switch to a 2bar or lower the boost to 7psi and see how it runs than.
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Old Dec 24, 2008 | 09:05 AM
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Originally Posted by Old Geezer
And, the FP is?? [Just because there's 2 pumps, who knows if both are running.]
If the car ran OK on the dyno, and now doesn't, something mechanical has occurred. [Unless you have changed the tune].

The car ran out of injector on the dyno. I took the fuel pumps out last night and soldered the 2 pumps wires together and tested them. They BOTH work.
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Old Dec 24, 2008 | 09:06 AM
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Originally Posted by Old Geezer
And, the FP is?? [Just because there's 2 pumps, who knows if both are running.]
If the car ran OK on the dyno, and now doesn't, something mechanical has occurred. [Unless you have changed the tune].

And FP is 55psi idle and is boost referenced.
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Old Dec 24, 2008 | 09:07 AM
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Originally Posted by TNTramair
this could be your problem...1 bar is only good for about 7.5psi. id switch to a 2bar or lower the boost to 7psi and see how it runs than.

Cablebandit ran a 1bar up to 20psi on this same kit.
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Old Dec 24, 2008 | 08:12 PM
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If you look between frames 2200 and 2600, it looks like your MAp sensor is maxed out at 104 yet you keep accelerating.

Isn't there a COS for boosted motors?
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Old Dec 25, 2008 | 03:06 PM
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if its just a small cam and 10psi put the maf back on it.
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Old Dec 28, 2008 | 03:12 PM
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SD tune, you should have a 2 bar MAP sensor.

You could get away with 1 bar if you retained the MAF(not SD) and run low boost.

But a 2bar SD tune with a custom operating system will give better control of fuel and timeing in boost.
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Old Dec 28, 2008 | 09:44 PM
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Originally Posted by TNTramair
this could be your problem...1 bar is only good for about 7.5psi. id switch to a 2bar or lower the boost to 7psi and see how it runs than.
1bar is good for zero psi...
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Old Dec 29, 2008 | 02:19 AM
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Originally Posted by Frost
1bar is good for zero psi...
Hahahaha, exactly what he said.
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Old Dec 29, 2008 | 03:52 AM
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Originally Posted by Frost
1bar is good for zero psi...
Why do guys put themselves through the pain and complete lack of fuel control? A 2 bar sensor is very cheap and will open so many doors.

Jez
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