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RB26DETT/240SX
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38 Posts
Discussion Starter · #1 ·
RB26DET: Oiling system questions.

The car:
1992 USDM, LHD, S-13 Silvia/240SX
R32 RB26DET
RWD converted via RB25DET transmission
Greddy T-78, single turbo conversion
JE pistons
Eagle rods

Current oiling system plan:
Modified RB26DETT oil pan (pics below)
Tomei oil sump
Tomei crank collar
N1 oil pump
Tomei oil restrictor
drain from the rear of the head to the oil pan
Greddy sandwich adapter
oil cooler
Accu-sump

My questions:
Will the N1 pump be sufficient?
Should I swap the stock pump gears with a set of Reimax gears?
Should I sell the N1 and upgrade to a higher end oil pump?
If I should upgrade, what brand? Reimax? Greddy? HKS? Tomei? JUN?
Any suggestions on an oil cooler?
Where do I plumb the Accu-sump?
Where is the best place on the pan to plumb the drain from the head?


The car will mainly be a street car, not a daily driver...just a weekend warrior. It may see some drag time, but very little. I'd like to make 600-700rwhp.





Thanks again for any help and opinions, I appreciate any info or input.
 

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Seasoned Member
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4,032 Posts
i would not use a n1 pump for 700 rwhp but i dont think that turbo will make that?anyway,a lot of power will need a thermostatic 25 row min oil cooler with proper large unrestrictive diameter oil lines,ive seen tomei stuff and its very well made but ive never seen their pumps,i have an n1 pump myself its ok but if you can afford better get it for sure,as n 1 pumps can break up from vibration of the crank when it hits high rpm,the crank damper condition has a lot to do with this i feel,
 

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RB26DETT/240SX
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38 Posts
Discussion Starter · #3 ·
I should've added that I am using a Full Metal damper. You don't think a single T-88 will make 600-700?
 

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Seasoned Member
Joined
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4,032 Posts
i know sod all about the statistics of that turbo,is it ball bearing?such a large turbo surely will suffer from lag unless its just for the drag strip you want it? im all for response myself
 

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RB26DETT/240SX
Joined
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38 Posts
Discussion Starter · #5 ·
I'm OK with it being mostly top-end, what turbo would you suggest for a single conversion?
 

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RB26DETT/240SX
Joined
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38 Posts
Discussion Starter · #7 ·
by that chart, I should be able to make approximately 740hp max, it may be a little lag-gy, but there are ways around that if I need them....thanks for the advise though!
 
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