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Location:
A.C.T.
Registered:
April 2004
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: What's stronger std RB26 or S1 1JZ
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Thu, 17 June 2004 10:38
 
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very little diffrence in strength. using one of each that has the same km,s the same fuel and the same tune they would break pretty much at the same point. i prefur the 1j but im biased.
mick
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Location:
Brisbane
Registered:
November 2002
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Re: What's stronger std RB26 or S1 1JZ
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Thu, 17 June 2004 11:22
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The RB26 has been more highly developed, and therefore with a stock bottom end someone has no doubt made more power than has been made on a stock 1JZ. Doesn't really mean much, though.
I actually have a great distaste for the "strength" argument or discussions of "how much boost" an engine can run. It all comes down to general condition and the way the engine is tuned, set up and treated.
Give me a 1JZ with an aftermarket ECU and I can blow it up with less than 1 bar at a power level of about 300hp. Give me 2 minutes. Same goes for the RB26 (or any other engine for that matter).
In all cases the engine blows up and all the sikbros will talk about how their cousin had one and it was shit because it blew up on their bitch's brother's dyno. It doesn't mean that the engine in question is weak, it just means that this particular example was manhandled.
I don't think there is a winner to your argument, but I have a soft spot for the 1JZ because it's a much berated engine due to it's factory turbo failures... and also that 90% of the population thinks Datto engines & rotaries are the only way to make a car go fast.
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Location:
Brisbane
Registered:
June 2003
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Re: What's stronger std RB26 or S1 1JZ
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Thu, 17 June 2004 12:01
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the 7m bottom end isnt much weaker than a 1jz...it is only the pistons that arent as strong...
From a lot of reports from the fellow making my pistons, 7m and the jz bottom ends are very similar strength wise.
rods from a 7m/1j/2j are amazingly strong...
And the hardened cranks are amazing...my crank had done 223000km when i pulled the motor apart to rebuild, i had it cleaned, hit it with a bit of wet n dry and i doubt you could tell it wasnt new.
Although the car is a dyno queen, the 7mgte supra in melbourne with 532RWKW was running stock crank and rods...i mean come on...nissan cant make shit that strong can they??
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Location:
Montrose, VIC
Registered:
May 2002
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Re: What's stronger std RB26 or S1 1JZ
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Thu, 17 June 2004 15:04
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Yeah, guys have managed similiar things with RB26s/30s. The RB26 really is king when it comes to head design, as well as that intake setup, plus they seem happier to rev than a 1JZ. They sound nicer at big revs than a 1JZ too, but then that's not to say they 1JZ isn't just as strong and capable of the same power. Oh, and the 1JZ has the enormous advantage that you can buy one, as well as 2 spares for the price of an RB26  If you think of strength as multiples of engines, well the Toyota comes out so far in in front 
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: What's stronger std RB26 or S1 1JZ
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Thu, 17 June 2004 23:04
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I don't understand the argument.
The engines are 'stock'. So in stock form the argument is irrelevant. Both are well proven engines that with adequate servicing and operation within the bounds set by the manufacturers will provide excellent service.
If you then want to talk about how much fully sik boost each engine might tolerate, then the engines are not really stock anymore and are not as the manufacturer intended. The argument becomes null and void.
As Einstein said, "Only two things are endless - stupidity and the universe, but I'm not so sure about the latter." You and your chump mate fit into the former category.
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Location:
Sydney
Registered:
January 2003
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Re: What's stronger std RB26 or S1 1JZ
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Fri, 18 June 2004 09:27
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| gianttomato wrote on Fri, 18 June 2004 09:04 |
If you then want to talk about how much fully sik boost each engine might tolerate, then the engines are not really stock anymore and are not as the manufacturer intended. The argument becomes null and void.
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I don't understand why you take it this way? His just saying which can take more on an unopened engine. Tuners will usally give a guestimate of what they feel is "safe" levels of power based on what they have done in the past.
Yes you can blow up a motor on a bad tune etc etc but lets say for arguments sake that both were in controlled environments. Both running X amount of boost and running safe mixtures which would die first. Hopefully this make it a little easier for you to understand, heh.
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Location:
Brisbane
Registered:
June 2003
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Re: What's stronger std RB26 or S1 1JZ
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Fri, 18 June 2004 09:57
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rb26 would die before a 7m...althought it might not blow as many head gaskets as a 7m 
And the 1jz is a tough little nugget too!
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Location:
Sydney
Registered:
May 2002
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Re: What's stronger std RB26 or S1 1JZ
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Fri, 18 June 2004 10:27
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1J/2J have chunkier bearings ect from factory so can take alittle bit of a beating (check out the post i put up about how hard i reved the thing for those that have not read it it was very close to 11 grand though this is prolly more of a fluke it didnt break and runs fine) RB26 is a fab engine though and will handle upwards of 300kw easy though, when your asking that much power 150-300% of what its designed to do we something might let go....if your asking this question cause your looking at an engine swap do yourself a favour and get a 1J much much more value for money and pretty much exat power/tourque ratings of an RB26
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Location:
Brisbane
Registered:
June 2003
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Re: What's stronger std RB26 or S1 1JZ
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Fri, 18 June 2004 11:05
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7m actually have thicker bearings....
fellow cutting my pistons has rebuild many of both/ hot rodded many more engines for 600hp + and he uses 7m big ends for all his rebuilds
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