RB30 vs 2JZ Which is the Better Block and Why? - Mythbusted

what's up everyone in this issue of platinum tech we're comparing Neeson's RB thirty two Toyota's 2jz GTE using real data and facts rather than your brothers cousins uncles nephews boyfriends cousins brothers sisters mechanics internet blog so that you can get the real facts and work out which one's better and why [Music] [Music] the RBE versus 2j argument has been raging since the Supra and GTR went on sale although really most people are arguing the chassis they prefer comparing a two point six liter to a three liter is well a little unfair so really the correct comparison when it comes to modifying and racing is the RB 30 versus the 2jz drag racing results have proven the 2jz is superior and handles big power without cracking or splitting the bores OAM blocks have run into the high fives although many of the 5-second inputs now run billet 2jz blocks so we can't really compare those either way the 2jz o en bloc has gone much quicker and faster than the RB it's interesting to note that not a single RB powered car is in the top 50 import lists but most of us want to know what's more reliable in the 700 to 1200 horsepower range we searched the internet for definitive reasons on why the 2jz is a better engine but most answers are simply just it's stronger we wanted the truth so after our RB comparison video we decided to put a - Jay Z on the bench and compare it to the RB 30 and get some real data first up visually you can see there are a totally different design from the outset although the oiling system is not part of our comparison you can see the size of the oil feed hole on the - Jay Z compared to the RB its massive the - Jay Z doesn't appear to have any noticeable external features or bracing but the meat around the head studs appears to be much thicker and beefier the whole length of the stud especially where an RB normally cracks looking at the deck you can see that the 2jz has 11 oil return holes versus the Arby's 5 the RB ones are 8 millimeters while the 2jz ones are nearly 16 millimeters almost double the faux and more than double the returns giving eight times more all return flow overall this is one of the reasons the 2jz doesn't have the oil problems of an RB with the oil getting stuck in the head the biggest difference with the 2jz is that it has Siamese bores making it effectively a closed deck block facing between the cylinders the bores touch and join together so no water passes between them this effectively doubles the size of the bore thickness at the point as Pistons next to each other aren't firing at the same time not only does this help stop splitting of the bores it also ties the internal part of the block together much better and creates a more rigid block head stud why's the RB 30 and 2 jay-z both use 11 millimeter head studs looking inside the two jay-z there is no extra ribbing or bracing and it's worth noting the two jay-z just has main caps and no girdle to tie it all together speaking with Joe from gas racing he said standard caps have handled a thousand wheel horsepower and over 2,000 horsepower billet caps and aftermarket studs do the trick the RB 30 has an integrated girdle and main cut the two JZ design obviously doesn't require the girdle to make its power but what if it did have one now let's get into some data collection between the two blocks ok so now we're going to compare what we can compare between the RB and the 2j blocks I'm just going to jump in a hardness testing now and we'll see the actual differences between both these blocks [Music] 277 that is extreme high range quality block we're gonna go straight over and test the 2j now you'll notice just by the sound that this tester makes it's a completely different animal 291 massive difference between both those blocks I've never had an RB rate that high before ever and I've tested 300 of them so I'm really impressed okay so next we're gonna go and discuss sonic testing and compare these two I've already tested this to Joe so it saves a bit of time takes me about half an hour without distractions to test each block especially with a bit of calibration and stuffing about now I'd usually test a try test a block a day 30-odd a month and this is this is the last month's testing on Barbies predominantly so I'm gonna grab my sonic testing gear and run through cylinder number one of this - Jay for you okay can't quite see the screen there five point seven mil on that face which is what I had there now the 2j you don't really even need to measure the thickness of the back end of the ball to the front end of cylinder twos because they're Siamese so there's no water flowing between them they're one piece that's joined together so you might as well grab a micrometer and see the difference what do you got there 7.22 ml let's go and measure this a little bit of a lip there which might give us a difference seven point five six so we're pretty well spot-on as a guide there right so now let's just do one more face okay so here I've got five point nine I've measured my lowest at five point six so somewhere on that area of the thrust face I had a five point six I measure the lowest reading now what I did notice with this 2j is the further up I got in the bore the thicker it became which is odd I don't know if that was done on purpose or not but that's really cool and I can see underneath behind it there's nothing there there's no water gallery joining material there to give us give us any reason to believe it wasn't done on purpose either way we'll take it it's cool that's where all the cylinder pressure happens it's all up top it's where balls want to crack so as far as casting quality on this 2j it's outstanding compared to the RB anyway okay now we're quickly going to go over to the RB and take a couple of readings there to grab our average sort of bore thickness so just remembering that on the sides that weren't siamese on the Tuesday we had an average of about five point six millimeters the siamese part of the bore viously we had that seven point two or whatever it was which is a obviously can't unless you go on bore it out so this one we're going to describe a random thrust side five point seven which is usually fairly high for an RB I'd say thrust is usually always good and then we're going to get the top on the bottom of the ball to give you an indication for point seven on the front face so straight away we've got a millimeter difference there between the RB and the tudo we're going to grab that back for these vary quite a lot on the back ball four and a half mil which is great for an RB there's no doubt about it so you could go and take a millimeter out of that you'd still have you know four point two or or so on that on that back edge a little bit thinner down the bottom if it was anything like the 2j it had jumped to seek smell up the top it's pretty consistent on that edge got a lot of course shift happening on our bees as well I notice it jump not inconsistently from five to three mil within the space of about six or seven mil so something to look out for you've really got to do twenty or thirty datum points per ball and then as soon as it starts getting thin somewhere chase it and find the actual thin spot and I'll make a note and more often than not if something ever does with a bore I can go back to my results and and see where that thin part of the bore is and I saw it match up so comparing the Arby's across the range including the Rd 28 you do get some really thin bits now my absolute minimum we've mentioned before three millimeters I get 2.2 mil 1.5 mil we had a brand new and one that one of the workshops asked me to test that was a big build HKS 2.8 billion dollar engine that tested it two point two millimeters and I condemned the block I mean you just got to take it case-by-case our last test that we're going to do is the deck thickness so we know that the RB is usually about seven and a half mil so we're going to quickly test this one and compare it to our 2j 7.2 ml of this one pop over to the 2j just picking a random spot here roughly same area 9.8 mil so roughly ten mil on that 2j 2 mil thicker off the bat it's pretty decent so final test is wait now we've just done all our other testing on these blocks we know the 2j is a denser harder block it should be heavier handles 2,000 horsepower or they will know that the RB probably half that so we are going to go weigh them now and see what the actual difference is sixty eight point eight kilograms okay now we're going to weigh the 2j and see how much heavier it is than the RB to make up for all its performance fifty six point nine kilograms that's a good 10 kilos difference myth busted huh looking at the data shows some interesting facts the 2jz is a harder block yet it weighs less it is also shorter by approximately an inch thanks to bore spacing and less length overall means harder to twist clearly the material used is superior and shows that hardness contributes to engine strength the RB 30 hardness averages between 250 and 271 B above average block with 277 meanwhile the two jze range so far has been between 290 and 310 so even the softest 2j is harder than the hardest r be minimum bore thickness on the sides is not much different but the 2jz gets thicker as it goes further up the ball and has a thicker deck by over two millimeters this combined with the Siamese ball means the 2jz can resist the ball ballooning or splitting much more basically it can hold together better under high boost and high power applications and far less prone to cracking although we already knew it was a superior block now we know exactly why [Music]

Channel: Motive Video

Views: 779,932

Rating: 4.8856754 out of 5

Keywords: RB30, RB26, nissan, nirmo, 2JZ no shit, 2JZ-GTE, faster, quicker, turbi, toyota, supra

Id: FHSvVIkxPB4

Length: 12min 39sec (759 seconds)

Published: Mon Dec 03 2018

Reddit Comments

[u/4x420]

"in the 700 - 1000 hp range" and here i dream of 300-400 whp.

[u/CdM-Lover]

What’s the difference between a 277 and 291 hardness. He said that was significant. But it’s about 5% diff. What’s the scale? What does that extra 14pts give you? It assumes I know what that means.

[u/Leappard]

I have confession to make: as a 2JZ owner I used this clip to mock a friend of mine who praises RB26. I told him to get a JZ but he didn't listen.

[u/mini4x]

Now do a B58 vs 2JZ.

[u/Justgetmeabeer]

I've heard the n54 in my 335i is a "modern 2jz" but I've also heard it's not. Any truth in that comparison?

[u/Cygnus94]

Just to give some context to this. The 2JZ was used in a Supra, one of the most popular Japanese sports cars of the 90s. The RB30 was used in the VL Commodore, a mid sized family car made to cart your gran to church on a sunday. The most potent application it ever found was in the R31 Skyline and made a maximum of 240Bhp even with a turbo.

The RB30 and RB26 are completely different beasts in terms of what they're capable of. The fact they're comparing the 2JZ to a significantly older design shows they're either incredibly biased towards the 2JZ or completely ignorant of how different the RB30 and RB26 are.

[u/DarkMatterM4]

That was a good watch. I'd love to see a VG30DETT vs 6G72 comparison from them.

[u/Gan-san]

4G63 vs SR20 or 3S-GTE please

[u/CarbonAltered]

i love this guys reviews and tech talk , been subbed to him for a while and always love when he does these compares . he also put me on to the JZed band wagon