whats better a rb25det or a 1jz?

[NightXCZ77]

It's a 50 pound difference from the front of the vehicle...I am sorry if you have to be so technical, but I was not going that far into it...of course, if you take 50 off the front and move it to the back there is a 100 pound difference.

No, 6k doesn't include taking money....that's original, go suck on a blow pop and shove it up your ass. I import engines, I got fucked over and you think it's funny that my customers have had to wait up until tomorrow to get their engines? I don't find that very funny, but hey, if you wanna laugh it up , go for it.

Once again, my opinion is not biased towards the RB...but you can go ahead and think they are. My opinions are based off of driving with the different engines in the car. More frontal weight holds the car down a bit more than stock, it also creates an easier drifter by having more to rotate around and slide with....but physics should tell you that.

I'm not trying to get anyone to buy anything from me...fact is, I don't have any RB's in stock and won't have any for about 3-4 months, so I am not looking to sell em anyways...SR's are where the money is at since everyone and their brothers think they are the best thing to happen to the 240....

Night

Originally Posted by klohiq

Since a normal 12v automotive battery weighs between 35 and 50 pounds, it isn't a 50 pound difference...it's about a 70-100 pound difference...I'm wondering how well you can be trusted with doing a swap when you don't even understand physics.

BTW does that 6k quote include you taking the person's money or not ...I'm just kidding...I'm sure you're the greatest mechanic ever...

I agree with Dorikin that you would have a biased opinion since you are the one trying to get people to pay you and to buy engines off of you. You also spent all the money and time dropping one in your own car. A few percentages shouldn't affect the car much since just changing small things like driver weight and rim choice affects the car greatly too...

Can't we just agree that all these engines are way better than domestics and leave it at that. I personally like the KA-T, CA, and RB25...but I definitely don't hate any of the other numerous fantastic engines that Japan has to offer (20b, 2jz, rb26, etc)

[NightXCZ77]

actually, an extra 100 pounds doesn't really do much to the stock suspension or the wheels and tires. If you have coilovers...you don't need to worry about anything. I did change stock tire size to 215/40/17 in front and 245/45/17 in back. I also have a GT-R LSD in the rear of the car. The 240's stock are like 54/46 as far as I know...how I achieved 52/48 I am not sure, but I have had the car weighed about 5 different times on two different scales. The racing seats could have lightened up a little of the car, the wheels could have lightened a little...who knows.

Night

Originally Posted by Moppie

Weight has a very direct affect on handling, generaly less is more.
By adding weight to a car you may alter things like its responiveness, willingness to turn in etc, but you are also giving the suspension and tyres a lot more work to do. The simple result will be a decrease in the ablity of both to maintian grip when cornering. Modifications will be required to allow for the extra weight, which of course should produce (if done properly) a car that handles better than it did when stock. By any chance did you also modify the suspension and change the stock tyres size?

And I am also curious about how you managed to take a front heavy car, add more weight to front and middle of the car, and even out its weight distribution. You must have removed weight from the front of the car somewhere, or added weight to the back end as well. Or you need to go and re-weigh you car and check you numbers.

[arsin21]

Well thanks for the advise but wouldnt i be better off with the 1j becuse the chepest rb25 i found was $ 2,500 but that was just motor and tranny no ecu or harness with that money i can get a 1j with everthing including a skyline rearend

[arsin21]

One more question what is the weight diffrenence between an rb25 or a 1j?

[mrflip69]

1jz is supposedly lighter than ka, and difference between ka and rb is 100lbs? Ask Night... but it seems like he got banned?

[DamianG]

Hi All

Just a few facts to clear up some misinformation.
JDm V's US 2JZ. The US version makes more power. This is due to different turbos being used. The japanese version used slightly smaller turbos with CERAMIC turbine wheels. Great for spoolup, but not so good for durabiltiy when the boost is wound up, thus the steel turbines on the US version.

The 1JZ and RB25 can both be tuned for heaps of power. The power limit will be high provided three basic crieria are adhered to.
1. Dont use the stock turbo - Upgrade to a free flowing large turbo to minimizs the heat load on the engine and reduce exhaust back pressure. This will enable more advanced timing to be used for a given boost pressure and up goes the power figure.
2. Secondly - use a large intercooler that can keep those inlet temps at bay. Once again, cooler temps = more timing = more power.
3. Tuning is all important. You need to ensure correct timing and fuel ratios. Your will need bigger injectors and a stout fuel pump to reliably support big power figures

If you can manage these 3 you will have plenty of power. 1JZ's have easily made 450HP at the back wheels with shock internals and a trust (Greddy)T78 turbo.

Go have some fun as any of these setups will be a riot on the road.

DamianG

[nissanfanatic]

Read the guidelines and I'm sure all these guys already knew most of that. Brian is really getting pissed about bringing up old threads so STOP!

[logik23]

Even though your post was informative, don't revive old threads.

[J SPEC SilEighty]

Originally Posted by DamianG

Hi All

Just a few facts to clear up some misinformation.
JDm V's US 2JZ. The US version makes more power. This is due to different turbos being used. The japanese version used slightly smaller turbos with CERAMIC turbine wheels. Great for spoolup, but not so good for durabiltiy when the boost is wound up, thus the steel turbines on the US version.

The 1JZ and RB25 can both be tuned for heaps of power. The power limit will be high provided three basic crieria are adhered to.
1. Dont use the stock turbo - Upgrade to a free flowing large turbo to minimizs the heat load on the engine and reduce exhaust back pressure. This will enable more advanced timing to be used for a given boost pressure and up goes the power figure.
2. Secondly - use a large intercooler that can keep those inlet temps at bay. Once again, cooler temps = more timing = more power.
3. Tuning is all important. You need to ensure correct timing and fuel ratios. Your will need bigger injectors and a stout fuel pump to reliably support big power figures

If you can manage these 3 you will have plenty of power. 1JZ's have easily made 450HP at the back wheels with shock internals and a trust (Greddy)T78 turbo.

Go have some fun as any of these setups will be a riot on the road.

DamianG

I'm not going to rag on you like I normally would if someone brought up an old ass thread because this is a well thought out, informative post. 2 thumbs up to you for that.

[DC1984]

the 1jz also comes in the toyota soarer. that half cut can aslo be purchased from jarcoinc.com for 2500 bucks, but it comes with an automatic transmission, youll have to get the usd, tranny from the lexus sc300. and you cant use the supra tranny because the tail housing is different.

[xcusememisswyn]

read up like 3 posts and feel like an idiot at the same time...

leave old threads whre they are

[nissanfanatic]

Old thread.

-Closed