Oil Coolers

  • sflaZ1T
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Re: Oil Coolers

23 Mar 2025 15:36
#910424
This is what I did. Bottom fitting goes to the turbo with a restrictor in the body just above it per Mr.Turbo. Cooler feed line out of rear hole of oil pipe with a restrictor in the line to the cooler then returning to the crankcase, not the motor. I have a deep rear sump oil pan and a high volume oil pump. Not the best way to route it but it helps.
 
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Re: Oil Coolers

02 Apr 2025 11:51
#910867
@sflaz1t - do you have any more pictures? I would love to see the hoses connected and how you routed. 
What connects to the 90 degree elbow with the yellow teflon tape? 

I have a similar junction that you show here that is used to feed my turbo and returns to the junction. Probably used the same way guys feed a oil cooler setup without a turbo.
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  • DOHC
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Re: Oil Coolers

05 Apr 2025 06:37
#910975
This is what I did. Bottom fitting goes to the turbo with a restrictor in the body just above it per Mr.Turbo. Cooler feed line out of rear hole of oil pipe with a restrictor in the line to the cooler then returning to the crankcase, not the motor. I have a deep rear sump oil pan and a high volume oil pump. Not the best way to route it but it helps.
 

Most of the pervious posts show methods for putting the oil cooler in-line between the pump and the feed path to the main oil distribution passage.

In this setup, the main oil path is still there, but oil is bled off and diverted away twice.  First, for the turbo, and then for the cooler which you note returns directly to the sump.

How can you be certain that the main oil passage to the block and head is still receiving enough oil volume?
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  • Bugeater
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Re: Oil Coolers

14 Apr 2025 17:21
#911321
How can you be certain that the main oil passage to the block and head is still receiving enough oil volume?
 
- Excellent question
75 Z1B Turbo...
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Mr. Turbo (Mikuni 42mm HSR draw through setup)
Dyna 2000 controller with their miniature series 3ohm coils

74 Z1A 1105cc...

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  • Wookie58
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Re: Oil Coolers

14 Apr 2025 23:59
#911327
How can you be certain that the main oil passage to the block and head is still receiving enough oil volume?

 
- Excellent question
I get having the turbo feed in  "Parallel" with the main oil circuit but not the cooler. Surely running the cooler in "Parallel"  through a restrictor instead of the normal "Series" set up is making the cooler ineffective as only a reduced portion of the oil is being cooled (I assume the high volume pump is compensating or your motor would have died by now) Later ZR750's do run the cooler in "parallel" (there is a small by pass port between the cooler lines) both both sides of the cooler are in the "pressure" circuit not a sump return

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  • zed1015
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Re: Oil Coolers

15 Apr 2025 01:10 - 15 Apr 2025 03:07
#911328
How can you be certain that the main oil passage to the block and head is still receiving enough oil volume?



 
- Excellent question
I get having the turbo feed in  "Parallel" with the main oil circuit but not the cooler. Surely running the cooler in "Parallel"  through a restrictor instead of the normal "Series" set up is making the cooler ineffective as only a reduced portion of the oil is being cooled
Yes! Running the cooler return direct to the sump is pointless regardless of whether the hi volume pump can provide enough flow to feed the head effectively or not and i certainly wouldn't run that set up with a stock pump.
 
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Last edit: 15 Apr 2025 03:07 by zed1015.
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