Dose's Sometimes DIY and Pay Someone Home & Boat Improvement Thread

[niZmO_Man]

Excuse you, RB30's are more reliable .

Throwing in another RB25 is the way to go.

[admS15]

Edward Lee's is upset you killed one of his 'low km' engines[emoji22]

[Count Grantleyish]

9 hours ago, admS15 said:

Edward Lee's is upset you killed one of his 'low km' engines

LOL!

[Dose Pipe Sutututu]

10 hours ago, admS15 said:

Edward Lee's is upset you killed one of his 'low km' engines

Man these low km RB25s are less reliable than a VW motor. Part of me is saying a C63 AMG is more reliable lol

[admS15]

20 minutes ago, Dose Pipe Sutututu said:

Man these low km RB25s are less reliable than a VW motor. Part of me is saying a C63 AMG is more reliable lol

Yeah nah, you need more RB in your life but I won't argue against a C63 either. Do both, lol

[V28VX37]

M156 in the front and LS1 in the back, everyone's happy

[Dose Pipe Sutututu]

will brappity brap for days 

[niZmO_Man]

I know what will happen... SR20DET

[Count Grantleyish]

I know what will happen... Edward Lee's built RB25DET [emoji14]

This.

[Dose Pipe Sutututu]

Funny you say that, I own a RB25 but mainly tune SR20s lol.

Rebuild plans so far, still indecisive about a few items:

Spool rebuild kit with the CP Pistons, Spool Sump, Camtech 264 mini-brappers, Performance Springs

 

Now the indecisive items:

Spool spline oil pump gears with an N1 pump, and Spool head drain.

Also my thoughts, if I run the head drain there wouldn't real need to run oil restrictor right? or wrong?

[No Crust Racing]

I was under the impression many people had seen the head "drain" was actually just a sump vent in effect. 

I'd do both if I had it all apart, never think about it again. 

[Dose Pipe Sutututu]

Yeah I had a good chat to Piggaz about it, looks like I'll run the restrictors still.

Funny it seems people are against running the spline driven pump gears say there isn't enough "movement" for slight crank imperfections and could chew up the pump. sigh.....

[Piggaz]

Run a Nitto or Tomei? 

Just keep off the limiter (although I know you love it). It's not that hard lol.

[No Crust Racing]

How that limiter behaves has a bit of an impact too, if only you knew a good tuner. 

[Dose Pipe Sutututu]

Yeah looks like I'll get the Nitto pump, it's only a bee's dick more than the Spool spline billet gears and a N1 Oil Pump housing.

I was trying to make the motor bullet proof, and that means rev limiter abuse proof like 1JZ and 2JZ, but I've read that the poor harmonics of the RB crank itself is enough to cause the crank snout to move and exceed it's normal circular travel cause any form of spline driven pump to misalign and go chomp. "Apparently" through Facebook whispers Nitto did the whole spline drive thing and abandoned it because it worked out more reliable keeping that Nissan oil pump drive style.

[Dose Pipe Sutututu]

2 minutes ago, ActionDan said:

How that limiter behaves has a bit of an impact too, if only you knew a good tuner. 

I do, he is me lol. Like Scarface once said, I trust me lol.

My limiter has a soft cut at 7400rpm followed by a hard cut at 7700rpm with timing pulled before it hits the limiter.

[No Crust Racing]

I said a good tuner... 

[niZmO_Man]

1 hour ago, Dose Pipe Sutututu said:

Yeah looks like I'll get the Nitto pump, it's only a bee's dick more than the Spool spline billet gears and a N1 Oil Pump housing.

I was trying to make the motor bullet proof, and that means rev limiter abuse proof like 1JZ and 2JZ, but I've read that the poor harmonics of the RB crank itself is enough to cause the crank snout to move and exceed it's normal circular travel cause any form of spline driven pump to misalign and go chomp. "Apparently" through Facebook whispers Nitto did the whole spline drive thing and abandoned it because it worked out more reliable keeping that Nissan oil pump drive style.

This is an interesting point. You'd think Nissan spent a great deal of effort on engineering something reliable, but I guess something went slightly wrong with the crank. Even after 20 years, Nitto found that sticking with Nissan's final design choice was the 'best'. I guess all those Group C experiences didn't go to waste

BTW, what about Reimax gears vs. Nitto pump?

[sneakey pete]

Just dry sump it.

Only way to be sure

[CEF33Y]

Have done a bit of reading on the spline drives, they seem to be used in the UK a fair bit.

Think someone on here (in the build threads somewhere) is doing a build with the spline, and put up the fitting instructions. I think it mentioned removing the dowels that locate the oil pump to the block, nip up the bolts, rotate the crank a few times (guess to "centre" the splines) then torque bolts to spec.