Rb25 > Rb26 (overhaul, And Reliability Modifications)

[TRD0524]

Helping a friend with a blown RB25 (R33 Skyline GTS-T) build his engine to be reliable. I have done a bit of searching around on these topics, none with direct answers though. His engine died of oil starvation and toasted the bearings.

He is going to use the RB26 crank, forged rods, pistons, rod bolts, Mahle Clevite bearings, etc, and machining the block to fit.

I know the RB25 and RB26 oil pan's are different. Is there any way to baffle up the RB25 oil pan like we can for the RB26s?, or solutions for that?

Oiling issues: As far as i know, i hear that either the Reimax, Tomei or HKS oil pumps are the MOST reliable out of the wet sump solutions. I know few people use the HKS and Tomei pumps with good results on moderate street/track cars. How about the Reimax Oil pump? Anyone with experiences on that?

http://www.reimax.co.jp/pages/products/lower-area/index.html

I know Reimax makes a BIG GEAR upgrade for the N1 oil pumps as well?

From what i know, when he uses an RB26 crank, he is open to use any of the RB26 oil pump upgrades as well. Is there anything else that would be need to be done to make it fit?

Oil drainback issues: Would an RB26 head oil drain return work with an RB25DET?

He wants to stick with the RB25, so can anyone with experiences with this engine give me some ideas so i can advice him? I am a little bit more familiar with the 26s, not so much with the 20s or 25s.

Any constructive criticism, or help is greatly appreciated. Thanks!

[Swiper the Fox]

Helping a friend with a blown RB25 (R33 Skyline GTS-T) build his engine to be reliable. I have done a bit of searching around on these topics, none with direct answers though. His engine died of oil starvation and toasted the bearings.

He is going to use the RB26 crank, forged rods, pistons, rod bolts, Mahle Clevite bearings, etc, and machining the block to fit.

I know the RB25 and RB26 oil pan's are different. Is there any way to baffle up the RB25 oil pan like we can for the RB26s?, or solutions for that?

Oiling issues: As far as i know, i hear that either the Reimax, Tomei or HKS oil pumps are the MOST reliable out of the wet sump solutions. I know few people use the HKS and Tomei pumps with good results on moderate street/track cars. How about the Reimax Oil pump? Anyone with experiences on that?

http://www.reimax.co.jp/pages/products/lower-area/index.html

I know Reimax makes a BIG GEAR upgrade for the N1 oil pumps as well?

From what i know, when he uses an RB26 crank, he is open to use any of the RB26 oil pump upgrades as well. Is there anything else that would be need to be done to make it fit?

Oil drainback issues: Would an RB26 head oil drain return work with an RB25DET?

He wants to stick with the RB25, so can anyone with experiences with this engine give me some ideas so i can advice him? I am a little bit more familiar with the 26s, not so much with the 20s or 25s.

Any constructive criticism, or help is greatly appreciated. Thanks!

Use a Nitto pump...German engineering and cheaper than the Jap pumps. Im running a group buy for them at the moment for $1250 delivered.

Rear oil drain is not needed.