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Sump Adaptors In Reverse.

TOBES

By TOBES,
in Engines & Forced Induction

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TOBES Rookie

TOBES

Posted
Posted

A question for the guys manufacturing sump adaptors to fit the RB30 block into a GTR...

Can you redesign your adaptor and pickup to fit a RB30 (VL) sump onto the RB26 block...??

The basic pattern would be the same and it could be a lot lighter as it won't have to carry the stress and torque from the front diff.

It would also allow me to use something like a Hi Energy sump.

I have seen the amount of work involved in modifying a GTR sump to remove the diff, etc and feel a nice light adaptor would be a tidier and cost effective alternative if the 26 was going into a Skyline.

The reason I ask is...

I have an R32 GTR and also a VL wagon.

The plan is to build a stove hot RB26/30 for the GTR and put the RB26, from the GTR, into the VL. The motor I have is relatively stock and has done less than 10K on a full rebuild so I don't want to pull it apart. It would suit the VL chassis nicely with just a few tweeks.

The money I would spend extracting good power from the RB26, if it stayed in the GTR, can go towards the new motor.

I only have to build one motor to have the best of both worlds...

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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

I would take a stab @ an adaptor costing more than a modded 26 sump any day.

26 sumps really aren't that hard to modify for a competent fabricator.

Plus you get the added suppport the RB26 sump gives, which the RB30 sump does not.

If your building such a stove hot motor - you sgouldn't even think about using RB30 anything sump.

You'll need something made for a GTR regardless of where its from

salival Enthusiast

salival

Posted
Posted
A question for the guys manufacturing sump adaptors to fit the RB30 block into a GTR...

Can you redesign your adaptor and pickup to fit a RB30 (VL) sump onto the RB26 block...??

The basic pattern would be the same and it could be a lot lighter as it won't have to carry the stress and torque from the front diff.

It would also allow me to use something like a Hi Energy sump.

I have seen the amount of work involved in modifying a GTR sump to remove the diff, etc and feel a nice light adaptor would be a tidier and cost effective alternative if the 26 was going into a Skyline.

The reason I ask is...

I have an R32 GTR and also a VL wagon.

The plan is to build a stove hot RB26/30 for the GTR and put the RB26, from the GTR, into the VL. The motor I have is relatively stock and has done less than 10K on a full rebuild so I don't want to pull it apart. It would suit the VL chassis nicely with just a few tweeks.

The money I would spend extracting good power from the RB26, if it stayed in the GTR, can go towards the new motor.

I only have to build one motor to have the best of both worlds...

Modified a few sumps now since i'm an alloy welder by trade..

Takes me about 2.5 hours to cut, clean and weld a gtr/gts4 sump from start to finish.. That would be cheaper than a $600 adaptor imho..

But yes, dropping the front diff would lose you ALOT of weight..

TOBES Rookie

TOBES

Posted
  • Author
Posted (edited)

The RB26/30 is going into the GTR with a suitably modified sump complete with diff...

I am more concerned with the mild RB26 going into the VL Commodore.

I was under the impression that the GTR sump would not fit the VL chassis...?

The adapter would allow me to use a decent sump such as a High Energy Super Pan rather than the stock VL.

I often hear that the GTR sump's oil control is marginal when pushed...?

(Please, no smart comments about the VL's ability to generate sufficient G forces to cause problems... :P )

Would the adapter cost $600.00...?

As it only has to hold and seal a tin sump to the block it can be made from a much lighter material, mounting hardware may be lighter, etc

Edited by TOBES
unique1 Mentor

unique1

Posted
Posted (edited)

so your wanting to put a rb30 sump on a 26 in a vl? the rb26 block already has the mounting holes to bolt a rb30 sump straight on (look under the block and it has 2 sets of holes, big ones and smaller ones, smaller ones are for the 30 sump), u just need to modify the side a fraction to clear the oil pickup area, not a big deal, i wouldnt stuff around using a 26 sump and cutting diff off etc, wayyy more work than modifying the 30 sump.

i had a rb26 with 30 sump (or rb25 sump, i think they are the same) in a vl and it went in fine.

Edited by unique1
unique1 Mentor

unique1

Posted
Posted
Hey unique1, cheers for that...

Makes the whole job so simple and so much cheaper.

Mind if I ask what pickup you used??

I assume it was the standard RB26...

I did wonder why no one had asked this question before... :P

no worries mate, from memory i used the 26 one, it was about 6-7 years ago now so my memory isnt the best on the conversion.

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