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Author Topic: ignition curve turbo car advise please  (Read 4447 times)
mr horsepower
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« on: July 10, 2016, 12:15:58 pm »

I was wondering if anyone have a sort of base map for the turbo efi car
So i can put that in the ecu and then fine tune it on the dyno?
Would save a lot of dyno time i think .

Gr henri
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BeetleBug
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Posts: 2836


Snabba grabben...


« Reply #1 on: July 10, 2016, 15:31:46 pm »

Depending on fuel, CR, cam and boost. Without boost = NA. I'm at 24 degrees @ 35 psi of boost. E85. NOT recommended unless you have a lazy compression and use ethanol.

-BB-
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10.41 - 100ci - 1641ccm - 400hp
mr horsepower
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Posts: 463



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« Reply #2 on: July 12, 2016, 22:26:56 pm »

Depending on fuel, CR, cam and boost. Without boost = NA. I'm at 24 degrees @ 35 psi of boost. E85. NOT recommended unless you have a lazy compression and use ethanol.

-BB-

Beetlebug
the Fuel is 95/98
cr is 8.5
Cam is tcs 20
 boost around 14 psi to start with

Gr henri
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BeetleBug
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Posts: 2836


Snabba grabben...


« Reply #3 on: July 13, 2016, 14:20:31 pm »

Depending on fuel, CR, cam and boost. Without boost = NA. I'm at 24 degrees @ 35 psi of boost. E85. NOT recommended unless you have a lazy compression and use ethanol.

-BB-

Beetlebug
the Fuel is 95/98
cr is 8.5
Cam is tcs 20
 boost around 14 psi to start with

Gr henri

My proposal would be to go laaaaaaazy (- 20 to 25dg) on the ignition when on boost and a good knock detector when you start tuning your ignition curve. There is a lot of HP to be found with more ignition until it suddenly is enough and you start to knock.

-BB-
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10.41 - 100ci - 1641ccm - 400hp
richie
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« Reply #4 on: July 13, 2016, 21:15:50 pm »

Henri

are you going to use boost compensation to pull timing? Then just use a normal N/A map and pull some timing under boost that way, something like 25-26 total at 14psi should be ok with it being watercooled as a starting point, what have you done to get compression that low? chamber shape will make a difference as well

cheers Richie
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Cars are supposed to be driven, not just talked about!!!   


Good parts might be expensive but good advice is priceless Wink
mr horsepower
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« Reply #5 on: July 16, 2016, 17:53:18 pm »

Henri

are you going to use boost compensation to pull timing? Then just use a normal N/A map and pull some timing under boost that way, something like 25-26 total at 14psi should be ok with it being watercooled as a starting point, what have you done to get compression that low? chamber shape will make a difference as well

cheers Richie

Hi richie yes i use map sensor
So until boost normal curve and then to 25 degrees ?
I did some head grinding and got the verry low cr pistons for it .
Wil try it hope it makes some power now.
Thanx

Gr henri


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