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
3,517
501
113
Central OH
Don@F1 said:
Thats pretty large. Do you know what injector he is running? Sac? VCO?
Click to expand...

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
4,082
252
83
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.
Click to expand...

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
101
3
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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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Vendor/Sponsor
Feb 1, 2018
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Larsen, Wisconsin
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
18
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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