RB/L Engine

[Stivva]

 

 

Just came across the above on Speedhunters, an Rb26 head mated to an L series block.

I don't have any further details, can any shed some light on this build?

 

Original article found below

http://www.speedhunters.com/2014/02/nostalgia-rules-at-japans-best-vintage-show/

[Ledge]

Stiv

Im putting RB30 single cam on my Z. I assume amount of work would be similar. If you cant do the work yourself

you will be spending upwards of 8g to do it.

 

BTW this isn't my engine

[Stivva]

That is a beautiful engine

[NZeder]

And here it is running.

 

[gav240z]

8g is still cheaper than an O.S Giken set up. But I'm sure there is more to that set up than an RB head conversion.

 

I think bang for buck rb30 block + 25 or 26 head is the way to go if you want twin cam L6 on the cheap.

[Zedman240®]

I had the RB25DE setup in the zed for a while and it was the best for a street driven zed; quite, smooth and plenty of rwKw's. Just needed some good cams to liven it up a bit.

[nizm0zed]

http://spark88.blog.fc2.com/blog-category-50.html

 

Hope you read japanese...

[gav240z]

Ledge I can't find your RB30/L thread, wondering if that project has now stalled given the RB26 dying and the purchase of the Hako?

[nat0_240_chevZ]

I have previously confirmed the following.

all headbolts and cylinders line up rb-L6.

main points of difference

-size of cooling jacket ports, head-block

-location varies slightly of cooling jacket ports (not alot)

-front of rb head to l block almost the same, but need to adapt chain->belt

-rear oil drain on RB is massive compared to the L, and needs the most amount of attention, but very do'able.

how much money you got?

Nat0

[andyk_79]

Are there any performance benefits doing this over using an RB series block - genuine question?  Or are the main drivers practicality (use existing drivetrain, engine mounts etc) and nostalgia (keep original engine number) ?

[pauly_adams]

I know of a member on here who has done it, it takes a dam lot of work and plenty of machining

[gav240z]

Are there any performance benefits doing this over using an RB series block - genuine question?  Or are the main drivers practicality (use existing drivetrain, engine mounts etc) and nostalgia (keep original engine number) ?

 

It's all about nostalgia, in particular the RB30 head appeals to me as it's the closest you can get to the LY engine.

 

See here for more info: http://www.viczcar.com/forum/index.php?topic=13887.0

[Riceburner]

And some FCR's to make it even cooler 

 

[gav240z]

And some FCR's to make it even cooler 

 

 

Hey mate,

I was actually going to ask you if there is a thread on here where you detailed installing those flat slide carbs on your car? I was going through your build thread but there's 30 pages so if you have a link to a post feel free to link me up!

[Riceburner]

I don't think I did any sort of detailed thread, it was just a few basic posts in the build thread.

 

Was there anything in particular?

[sydney mike]

Someone correct me if I'm wrong, but I think the appeal is that AFAIK, ADR's prevent us from fitting triple carbs or any carbs for that matter to a late model engine such as a RB, that you can't go backwards in terms of pollution gear. So a way around it may be to fit the RB crossflow head to a L and run the triples on that like a 432.

 

I assume if you can find an original carby-run RB30 from a Patrol 4wd, you might be able to do it that way?

 

 

Are there any performance benefits doing this over using an RB series block - genuine question?  Or are the main drivers practicality (use existing drivetrain, engine mounts etc) and nostalgia (keep original engine number) ?

[Ledge]

Ledge I can't find your RB30/L thread, wondering if that project has now stalled given the RB26 dying and the purchase of the Hako?

 

Gav I sold the car that the LY replica was destined for to help fund the Skyline. I still have the parts and it will eventually go

in the Skyline. But yes I am focusing on the RB engine Pete is building for my track car.

The LY replica will start again after that.

[gav240z]

Someone correct me if I'm wrong, but I think the appeal is that AFAIK, ADR's prevent us from fitting triple carbs or any carbs for that matter to a late model engine such as a RB, that you can't go backwards in terms of pollution gear. So a way around it may be to fit the RB crossflow head to a L and run the triples on that like a 432.

 

I assume if you can find an original carby-run RB30 from a Patrol 4wd, you might be able to do it that way?

 

 

 

In part the appeal is that, but it's more to retain the L-series, at least for me it is. The RB30 head like the LY head has a hemispherical combustion chamber which has advantages in itself but yes the easiest way to do it would be slot an RB30 block in a Z.

 

I don't think I did any sort of detailed thread, it was just a few basic posts in the build thread.

 

Was there anything in particular?

 

Rather than go off tangent on this topic I'll send you a PM.

 

Gav I sold the car that the LY replica was destined for to help fund the Skyline. I still have the parts and it will eventually go

in the Skyline. But yes I am focusing on the RB engine Pete is building for my track car.

The LY replica will start again after that.

 

Fair enough, we can't do everything. I do like the idea of an LY replica though, would be really cool for a Rally Car replica .