300ZX N/A to RB26DET

[4AM]

After looking at possible build ups on my VG30, I've pretty much set my mind on the Skyline RB26DET. The engines I've been considering are not new. i am in high hopes this will satisfy my HP need and allow me to have a more personalized 'Z'. i will try to post each mod as it comes up after the engine and transmission arrive. There should be plenty to remark on this swap!

[AZ-ZBum]

Have you even priced out an RB26DETT and transmission yet?

[raremotive]

rb25 better option to go, it will get just as powerful as a rb26... before extensive mods are needed.

[sek8031]

HP Need? Is that like some kind of diabetes of the right foot?

[mikeith]

rb25 better option to go, it will get just as powerful as a rb26... before extensive mods are needed.

the bottom end on the 26 will handle more and the head flows better. you'll need a rb25 transmission though.

its a pretty costly build eitherway. you'll spend just as much or more on everything you have to do to make it work as you will on the engine transmission alone... realistically looks 7-8K+ if you can find an engine/transmission for 3500 or so

[raremotive]

By not very much, rb25 can take a betting and suffer the same weaknesses. Weak piston ring lands. And once pushed to the limit both begin to lose a rod bolt. But, 400 to 500 hp rb25 are very common.

Compare stock verse stock the only thing the bottom ends have different is a beefier rod on the rb26. But, they still suffer rod failure just like rb25s. When you look at it, both have the same 2 bolt cross areas being stressed. Never seen a ROD failure on either motors or any. But I have seen many rod BOLT failures.

in order weakness is:pistons>rods bolts>valves

rb25 will get you to your goals much cheaper, they are practically the same motor. Cept the rb26 has the hysteria behind it.

^ I will agree. It's a costly build. And I can pick many motors that will weigh less and give more hp for a lot less.

[mikeith]

unless you are wanting to make more than 400rwhp, than it would be much cheaper to build a killer L28ET

[evildky]

he has a Z31, building the VG30ET to well north of 400 whp is WAY cheaper than the RB swap

[sek8031]

But...but...It's just not as coooooooooooool!!

Nobody wants to admit that they don't drive a Skyline.

[raremotive]

even if you put a rb in it you still not driving a hyped up Skyline.

[AZ-ZBum]

even if you put a rb in it you still not driving a hyped up Skyline.

No. He'd be driving a Z31 with a motor that's worth more than the car.

[evildky]

No. He'd be driving a Z31 with a motor that's worth more than the car.

thats true of most Z31's

[raremotive]

No. He'd be driving a Z31 with a motor that's worth more than the car.

thats true of most Z31's

[4AM]

Yep, I've priced about 50 of them. And I've found myself fine with it, unless I come across an S30 (which I'll still build up the engine or replace it) I'm going with a more race proven engine...and I still want a 6cyl.

[4AM]

Its a form of frustration, from the car not preforming when I need (want) it to.

[4AM]

Yeah, i'm ordering the RB25 transmission seperate... actually first. I wasn't aware of the transmission option till I started shopping for an engine.

[4AM]

I considered this, but it seems like I'm going backwards...

[4AM]

My VG30 has so many miles on it, previous owner never keep up with maintenance. Its just worn out... and the transmission has about month, if I'm lucky. I really don't have a choice, if I'm going to replace the engine and trans., I'm going better.

[4AM]

I'd like to also add, i don't care how much money I spend on this build, I'm not rich, but I'm willing to save and buy what I need as I can... if I had all the cash on hand. I'd have an 10th Anniversary FairLady Z shipped over, but that's just not the case.

[evildky]

Yep, I've priced about 50 of them. And I've found myself fine with it, unless I come across an S30 (which I'll still build up the engine or replace it) I'm going with a more race proven engine...and I still want a 6cyl.

the VG is far mroe race proven tahn the RB at least in the states ti is, can't say on a global scalsbut I suspect it's mreo proven globally as well as it's found in more chassis and the V6 offers a mroe favorable weight distributionand the L6 has more race pedigree than the rb and the vg put together

[AZ-ZBum]

I love how he's priced about 50 of them, but won't say the range or sites he's found them on. I also love how he has to make a billion posts in a row since he's so ADHD he can't get all his thoughts together before hitting the submit button.

[4AM]

I love how he's priced about 50 of them, but won't say the range or sites he's found them on. I also love how he has to make a billion posts in a row since he's so ADHD he can't get all his thoughts together before hitting the submit button.

Did you ask that? Where? "cause I flippin missed it!..oh, my thread; post when I like... and if you look at the top, they individual comments and answers...a**.
Modified by 4AM at 12:04 AM 5/10/2009

[4AM]

the VG is far mroe race proven tahn the RB at least in the states ti is, can't say on a global scalsbut I suspect it's mreo proven globally as well as it's found in more chassis and the V6 offers a mroe favorable weight distributionand the L6 has more race pedigree than the rb and the vg put together

The Ls...inline isn't it? I like that. Were the engines cabeurator then? I bet they're rare and alot has to be changed to bring her up todate. But I have not looked into it. I am though, it would certainly be more "Z" and have lots of engine compartment room. Where the Ls tall? U know the hood.
Modified by 4AM at 12:06 AM 5/10/2009

[evildky]

The Ls...inline isn't it? I like that. Were the engines cabeurator then? I bet they're rare and alot has to be changed to bring her up todate. But I have not looked into it. I am though, it would certainly be more "Z" and have lots of engine compartment room. Where the Ls tall? U know the hood.

Modified by 4AM at 12:06 AM 5/10/2009

the L6 includes the L20A (not available in america), the L24 carbed int he 240Z, the L26, some came carbed most were injected) the L28 all injected, and the L28ET also injected, externally it's similar to the RM but with a smaller head due to being a single cam, the RB replaced the L6, the RB inherited the L6 cylinder bore spacing, the RB26 used the same stroke as the L24 with the engine bore fo the L28

and no they are not rare they last dang near forever the issue si the cccars rusted aroudn them, the 90's Z32 that ran in the SCCA GT2 class was powered by an L28ET do to diplacemtn limits of the class

but it's still a step backwards to put an inline 6 in the Z31 chassis, when the VG30ET has such great potential and is a factory offering in that chassis, these engines are capable of well north of 400 whp on stock internals

[raremotive]

The VH v-8 motors are race proven. SuperGT, Lemans series. All aluminum blocks. Way lighter, and higher torque than the rb series. They actually switched the tt rb with the na vh for better initial response around the apex..and every additional g you get the faster you are. Additionally it increased reliability of the race car on the track with fewer parts to fail.

These motors come with forged inners, unlike his older brother rb...

[DJ Raijin]

The VH v-8 motors are race proven. SuperGT, Lemans series. All aluminum blocks. Way lighter, and higher torque than the rb series. They actually switched the tt rb with the na vh for better initial response around the apex..and every additional g you get the faster you are. Additionally it increased reliability of the race car on the track with fewer parts to fail.

These motors come with forged inners, unlike his older brother rb...

Sweet, Glorious, Delicious VH45. I bet it feels great to have 200ft/lbs available at idle and a max of 320ft/lbs at your disposal without lag of any sort. Just pure powerband.

or get your jdm-tyte RB.

[evildky]

the VH is more overengineered than the VG30DETT, how many VH swaps have you seen? and how many of them last mroe than a few thousand miles? if you want a VH, get a Q, they are cheaper than parts for the eigne anymore

[AZ-ZBum]

Did you ask that? Where? "cause I flippin missed it!..oh, my thread; post when I like... and if you look at the top, they individual comments and answers...a**.

So how much can you get an RB26 for?

[gmac708]

So how much can you get an RB26 for?

R32 RB26DETT motorset $3200RB25DET trany $1350

[evildky]

for $4500 you can buy a running Z31T, and build it ro well north of 400 whp, you still ahve to fab the oil pan, buy or fab the mounts, fab the piping for ht intercooler and cooling, fab the criveshaft, work out the wiring and if you want anywhere near 400 whp it's gonna need new injectors, ecu and bigger turbo's, and at that point most opt for a fsingle turbo conversion that means a nes exhaust manifold and most also opt for a single tb conversion manifold