RB30 Oil pump Vs RB26DETT Oil pump

[JNR24]

Hi guys,

Just woundering what the diffrence is between these two pumps?

Is the Relief spring the only diffrence? Casting diffrent? Gears??

Cheers,

Trev

[SteveL]

The difference is the gear width:

RB30E - 10.8mm wide

RB30ET - 13.4mm wide

RB26DETT - haven't measured, but looks like about 15mm wide or so to the eye.

Relief spring pressure may also be diff, but I can't say for sure.

[JNR24]

Your a champ steve!

DO you know the diffrences with the water pumps as well?

[SteveL]

I should also say that I remembered reading somewhere that the the RB26DETT crank nose is larger in diameter than the other RB engines. If this is correct, then the ID of the pump gear will also be larger. I can actually confirm this if you like as I have an RB26 oil pump on the bench, and RB30E one (buried somewhere)....let me know.

As for the water pumps, don't know for sure, but it's possible the RB26 type would have a higher flow rate as it has to feed 2 turbos - but then again, the same thing could be achieved using a smaller diam pulley....

[Cubes]

I just priced up a R33 GTR Oil pump... $633 from Nissan

[JNR24]

LOL i just picked one up on friday for $60 (RB26DETT Oil pump & RB26 Water pump $20)

[SteveL]

I got my RB26 oil pump for free

Actually, given Nissan's ridiculous prices on other parts, $633 doesn't seem all that bad.

[JNR24]

Yeh tell me about it!

I got quoeted $780 for a lower control arm (steering), ended up spending $80 for the same arm through a jap wrecker! =)

Nissan like to make about %600-700% markup on everything! =)

[Cubes]

So where are you getting the adaptor JNR?

[JNR24]

Good question Joel,

I think Tomie/Jun? make a adapter for this. I just have to speak to a few people and see who sells them. I havent started looking for that just yet. As i am trying to find a set of good cheap forgies, i think there called Aries? "rocket industries" make em. got a quote off a guy on here for $1100 with rings!!!

So iam just buying all the little cheapy bolt ons that i will need for later, like this oil & water pump. But thanks for bringing this to my attn.

So were are you at with your RB30 build? progressing?

PS: if you find a place that sell them, drop me a PM.

PPS: also for oil squirters.

Cheers,

Joel!

[Cubes]

Let me know where you get the jun adaptor and pistons etc.

Do the pistons have to have provision for the oil squirters?

Or pistons are pistons oil squirters or not?

I'm using the oil squirters from my RB20DET.

I'm at the stage where i'm just getting all the bits together.

[OVL-747]

differences between rb30 and rb30t are as said above , plus the rb30t releif spring is about 4 mm longer.

the gtr pump is i think same size as rb30t pump , but has different shaped gears and the releif valve is slightly larger diameter.

best to check though.

a mate is using a gtr pump on his vlt

[Cubes]

What are the standard VLT pumps like?

[OVL-747]

the standard vl turbo oil pump is very good , i have been toying with vls for a while now and havent heard of many oil related probs ever.

both the rb30 and rb30t pumps have the same oil pressure but the rb30t pump being larger allows more volume of oil.

[Cubes]

What sort of power level do the VLT's use them to before they go for a larger item?

[OVL-747]

im not exactly sure but i think ppl like rajabs and jpc still run the vlt pump on their race cars - all 9 sec vlts. they have plenty of power.

i know many vlts with 300-500 rwhp and never have any probs with oil starvation.

they are a very reliable pump.

[Cubes]

Might have to go visit a few vl forums and find out how to adapt the T pump to the NA Crank.

[SteveL]

Originally posted by -Joel-

Might have to go visit a few vl forums and find out how to adapt the T pump to the NA Crank.

Don't need an adapter for the VLT pump - interchanges directly with the NA type.

[Cubes]

Arn't the gear sizes different between the NA and the T's?

[SteveL]

Originally posted by -Joel-

Arn't the gear sizes different between the NA and the T's?

Only the width (for higher flow @ same rpm) - ID is the same.