BLK ICE
Pro
we'll leave the light on for u
Posts: 1709
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posted March 22, 2011 09:52 PM
 Edited By: BLK ICE on 23 Mar 2011 05:54
quote:
quote:
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With 15 or 16 to 1 compression and .0024" rod bearing clearance you need to bring up the pressure curve.
is that for cushing or cooling .
i don't even want to know what my stock motor compression ratio is under 10lbs of boost @11k rpm .. i'm scared to hear it ..
I do. What is a stock motor's compression ratio @ 10lbs of boost or 120 shot of nitrous @ 10600 rpm?
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted March 23, 2011 04:46 PM
quote:
quote:
.
With 15 or 16 to 1 compression and .0024" rod bearing clearance you need to bring up the pressure curve.
is that for cushing or cooling .
i don't even want to know what my stock motor compression ratio is under 10lbs of boost @11k rpm .. i'm scared to hear it ..
The added pump volume gets the pressure back up after you increase the rod bearing clearances and keeps the rods floating. The extra flow past the rod bearings keeps the crank, rods and bearings cooler by removing more heat and carrying it to the oil cooler where the cooling system can bring it to the radiator and get rid of it.
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Y2KZX12R
CompetitionCNC.com
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted March 23, 2011 04:47 PM
Oh, the first batch of gears came in today.
I'll post a few pics tomorrow.
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Y2KZX12R
CompetitionCNC.com
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zx14fan
Zone Head
Posts: 547
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posted March 23, 2011 05:20 PM
"The added pump volume gets the pressure back up after you increase the rod bearing clearances and keeps the rods floating." floating? Its only side clearances that get sized down. thats an old pro stock trick from way back but its also harder on the rings thats why most modern pro stock cars run a zero weight oil.Warren johnson wrote much about that subject.
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted March 24, 2011 06:01 AM
Were not changing the rod side clearance at all. Just the oil clearance between the bearing at journal.
Opening up the rod side clearance will allow too much oil to flow and the rings will have a hard time scraping it away.
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Y2KZX12R
CompetitionCNC.com
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted March 24, 2011 06:02 AM
Heres a few pics of the new gears.
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Y2KZX12R
CompetitionCNC.com
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