Mahle Motorsport cast piston VS Fingers Oval

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Don@F1

New member
Jul 17, 2019
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Hey Chilly, how large are the injectors your buddy is running? The truck that had bad haze at stoplights?
 
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Don@F1

New member
Jul 17, 2019
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LBZ nozzles are all sac style. Sac can haze a little more at idle than a vco in some engines.
 
PureHybrid

PureHybrid

Isuzu Shakes IT
Feb 15, 2012
3,495
476
83
Central OH
Don@F1 said:
Thats pretty large. Do you know what injector he is running? Sac? VCO?
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Seems to be the norm. Rarely will someone suggest something smaller, gotta have that "room to grow". I can't remember the last time someone recommended a 30-45% nozzle.
 
gmduramax

gmduramax

Shits broke
Jun 12, 2008
4,072
248
63
Nor cal
PureHybrid said:
Seems to be the norm. Rarely will someone suggest something smaller, gotta have that "room to grow". I can't remember the last time someone recommended a 30-45% nozzle.
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500hp trucks should have 60% injectors in my opinion. 100’s don’t leave much room to grow.
 
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Chilly

Member
Dec 4, 2018
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Well I just ordered some oval pistons last night. I think I'll deal with a little haze vs. rebuilding my engine again... Went with 16.5CR with twin turbos. Hope it isn't to much but would like to keep the haze to a minimum.
 
Bdsankey

Bdsankey

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Feb 1, 2018
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Chilly said:
Well I just ordered some oval pistons last night. I think I'll deal with a little haze vs. rebuilding my engine again... Went with 16.5CR with twin turbos. Hope it isn't to much but would like to keep the haze to a minimum.
Click to expand...

You'll be fine on compression ratio. 16.5:1 is a good ratio for a daily driver year round, especially in cold weather.
 
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Chilly

Member
Dec 4, 2018
101
3
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I found a CR calculator in an old thread. Can anyone confirm that the piston chamber volume on a set of oval pistons is 42.00cc?

Thanks
 
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