The downright basic truth of RB20/RB25

Discuss the RB20, RB25 and RB26 series engines.
Bryson
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ok guys.... its come down to it.. I have been analyzing the money I have/ the money i need/ and the money I need to make between now and december to finish off the car and still have the money to move home... all I have to say is it is mind bogeling and the ammount I am spending on this car is starting to get out of control.

I seriously WANT my RB25, it has more torque which I like, and higher stock HP output which I like...but in all seriousness considering I plan to leave the stock turbo on the RB25 for a year atleast, is the difference between the RB20 and RB25 that great?

I don't know.. even writing this I want my RB25... but that could just be the bigger/more expensive must be better side of my human reasoning which is often wrong.

And if you HAD to choose between an RB20 or SR.. I know this has been talked about 90 times over, which would you choose?

In all truth.. I WANTED a turbo charged KA.. then I decided on RB25 which I kind of want more.. but if its not the RB25 I'd really like it to be KA-T... with the situation at hand the only way I see that happening would be to get my clip from Cameron, then selling it for the price of the clip + someone close to my shipping cost which I don't see happening.

Anyways back to my main point. To those who have experience with one of these engines or the other (RB20/25) or both. Is it truly worth the extra 1000 dollars and a little bit of financial struggle.


Rockenreno
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I'd go RB25 or KAT personally. Unfortunately I have no experience with turbocharged engines being in my car seeing as how I am unwilling to undergo the financial hardship you speak of. It sounds like you already have an RB on order. If this is the case then you don't have much choice unless you cancel the order and recover all of your money. I don't think its worth the hassle to sell an rb25 in order to buy an rb20. That half liter of displacement helps a lot.

On another note, if you are putting so much into the car, why not just do it right, the way you want it to be done? Either way you spend a lot of money, but if you go with the RB25 you can say you achieved your goal, and there is satisfation in that. If you downgrade, you will always wonder what could have been...

Bryson
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Ya I suppose... well my clip isn't here yet and I have the option at this point to switch it for the SR or RB20 and recover the difference in price... I want the RB25.. It is just seriosuly going to be a ***** to pull it off.. I HAVE to atleast have 3,500 dollars to move back home with.. and that is a pitiful ammount as is...

as far as I my car goes I refuse to get the engine done without getting the body slightly tweaked and the suspension overhauled, and for all this to work I Have to make atleast 2.3k over the next 2 1/2 months working.. the only flaw in this is my $$ is based off how many windows I install which is limited to the # of windows we HAVE. so its a gamble.

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Nameless EJ6
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I'd turbo the KA or get an SR20. It's all up to you what is more important in your situation. Either way you're going to be turbo it sounds like.. so I personally wouldn't worry about the RB25DET.. just forget it and stay 4 cyl...

APEXi240
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If finances are as much of an issue as you say they are...RB20, its the cheapest clip to buy.

Imissmyturbo
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If I could start over I would Turbo the KA. It's got a pretty beefy bottom end stock and with upgraded rods + pistons it's stronger then the SR RB VG. The best part is you don't have to worrie about finding one. Instead of paying for an overpriced swap that could be in bad shape. You can put your money into a good turbo and fuel system. For 1500 bucks you can build your KA and still have 1000+ left over for other parts. I think the most important thing with turboing the KA is the engien mangament. You must get a good standalone if you watn to make power. Haltech, Motech, Tech II or III are good systems to use. If you skimp out on that you will either not make the power you want or you will blow your engine.

spec-v5150
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Imissmyturbo wrote:If I could start over I would Turbo the KA. It's got a pretty beefy bottom end stock and with upgraded rods + pistons it's stronger then the SR RB VG. The best part is you don't have to worrie about finding one. Instead of paying for an overpriced swap that could be in bad shape. You can put your money into a good turbo and fuel system. For 1500 bucks you can build your KA and still have 1000+ left over for other parts. I think the most important thing with turboing the KA is the engien mangament. You must get a good standalone if you watn to make power. Haltech, Motech, Tech II or III are good systems to use. If you skimp out on that you will either not make the power you want or you will blow your engine.


Word:oface . I wish I had done this too. But NO ONE wanted to ship me a KA so I said screw it and got a RB20. Now if I had to choose between the RB20 or SR20. Now having an RB20, I would have gotten an RB20 on price alone. All things being equal, I would get an SR20 just for the fact of parts. Sure we have a sticky for parts, but still. Nothing beats being able to call up a local dealer to order a part in stock in the US. Sure we can get into blocks and heads and sleeves and whatnot, but if you want 1000HP, you are going to have to upgrade either motor so....

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PROJECTRB240SX
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RB20 IS A GREAT ENGINE, LESS THAN AN SR BUT SAME POWER. THE RB23 OR 24 CONVERSION IS WAY TOO COSTLY, YOUR BETTER GETTING A RB25. ANY WAY ALL THE MOTOR OPTIONS ARE GOOD DEPENDING ON WHAT YOU WANT TO DO WITH IT.

d240t2
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RB20DET has an 8Krpm rev limiter, not redline...according to the tach the redline is around 7K, IIRC.

Yellow4g63
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I thought the red line started at 7k and maybe fuel cut at 7500 or so. Nice I can't wait... not that it will make power all the way to 8k with out some huge cams and mods.

Bluefire
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I like to think of it this way... All are good motors and great way to make more power.... But I figure if I had my heart set on the Rb25det and if I decide to "settle" on something else, I know that later down the road I'm still gonna want that RB25DET.

-Bluefire

spec-v5150
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Bluefire wrote:I like to think of it this way... All are good motors and great way to make more power.... But I figure if I had my heart set on the Rb25det and if I decide to "settle" on something else, I know that later down the road I'm still gonna want that RB25DET.

-Bluefire


Yeah but at the same time you have to look at the bigger picture. I wanted an RB26 but settled for an RB20 for many reasons. This guy has other commitments. Thats life. I wish I had gone to college but I settled for the military. I used to regret that, but I am in college now. SO I am still achieving my objectives. He can get an RB2) or SR20 and still make some good power and get to his objective. He isnt losing much power going from the RB25 to the RB20 or SR20. Ahit I would be happy with ANY of the swaps...

Bryson
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Ok guys I am going to throw this option out... mods if you feel this is ADVERTISEMENT then close it I guess but I'm just asking to see if anyone is interested in helping me out.

Is there anyone interested in taking my place in ordering an RB25DET clip thru Night7 Racing?

The ammount would be $3,600.00 and would include the R33 clip and a GTR LSD. That is suppose to arrive end of this month. If anyone is interested I'd sell my "spot" for 3,500.

If no one is interested, I'll just struggle this one out I suppose. I really want that RB25, but damn I guess there comes a point when you have to decide whats more important.

Like I said if anyone is interested let me know, and if not well then I'll just HAVE to make it work somehow.

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93semax
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IF you have to ask yourself if it's worth it, it's not then. To me it was how much power I wated to make. Less then 350hp I'd go with a KA-t, 350-450 SR, 450++ RB25,26. To me getting a RB to make just 350rwhp is pointless.

Bluefire
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Well obviously if the motor is really stretching your wallet and it means not being able to move back home then it isn't worth it. But like in my case saving up for the Rb25 simply means a lot less going out and eating and drinking at home. Now if I were trying to go for the 26, that would be completely out of my budget cuz then I would have to cut into funds for actual necessities, like school. I guess it all depends on how you are. I'm the type that if I set my heart on something, I'll work my *** off to get it, otherwise I won't be happy. Some people call it obsession, I call it Passion :D

-Bluefire

spec-v5150
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Bluefire wrote:Well obviously if the motor is really stretching your wallet and it means not being able to move back home then it isn't worth it. But like in my case saving up for the Rb25 simply means a lot less going out and eating and drinking at home. Now if I were trying to go for the 26, that would be completely out of my budget cuz then I would have to cut into funds for actual necessities, like school. I guess it all depends on how you are. I'm the type that if I set my heart on something, I'll work my *** off to get it, otherwise I won't be happy. Some people call it obsession, I call it Passion :D

-Bluefire


I see it both ways. Your points are good. I am that way about my video games. I called EVERY single store that sold PS2's for months in 2001 looking for one. EVERY SINGLE DAY I called. Some call that obsession too....LOL...

Bryson
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If anyone is interested in buying it from me before I have to pay the shipping, lemme know. If someonebuys it for 3,450 I will donate a $100 bucks to NICO and this includes a GTR LSD.

AREITU
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I'm in the same ditch as you are 20? 25. 20? 25. 20? 25. The lure of drop-in power, but the expense is exponentially higher. Custom driveshaft, etc. Get the 20 and upgrade? Or keep the stock 25? Oy oy oy.

Onizuka
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arn't the RB20 aftermarket parts just as expensive as the RB25 parts? yah know, same block and all....

AREITU
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Well, but after dropping in an RB20 as opposed to the 25, one would have a lot more money left over, I would think. No need for a custom driveshaft, and the engine itself is much cheaper. Say, does anybody know who does wiring jobs for them and retains AC?

Bryson
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I can't believe my post was hijacked...

AREITU
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Bryson wrote:I can't believe my post was hijacked...


What exactly is post hijacking? :confused: I'm new to this thing, and if I've unknowingly hijacked your thread, I'll edit or delete my previous posts.

Onizuka
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hehe, hijacking just means that the thread has deviated from its origional subject. dont worry about it :)

Bryson
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hah no worries man I was joking.. I just ment that I started this thread out for the purpose of getting input on whether or not the RB25 was really worth some financial strain over the RB20.. then I made it into asking if anyone wants to buy my RB25 off me, but it became a debate over rev limit and wiring questions but its cool. :)

AREITU
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Bluefire wrote:Well obviously if the motor is really stretching your wallet and it means not being able to move back home then it isn't worth it. But like in my case saving up for the Rb25 simply means a lot less going out and eating and drinking at home. Now if I were trying to go for the 26, that would be completely out of my budget cuz then I would have to cut into funds for actual necessities, like school. I guess it all depends on how you are. I'm the type that if I set my heart on something, I'll work my *** off to get it, otherwise I won't be happy. Some people call it obsession, I call it Passion :D

-Bluefire


Werd.

By the way, the GTR LSD...is it the V-LSD or the A-LSD and does it require different driveshafts?

d240t2
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NightXCZ77 wrote:OH MY GOD, DENISE IS ALIVE...and the same old prude.


I only said something because we had so many issues on that point before (you claimed that we claimed the redline was at 8K, when we actually said the revlimiter was at 8K, etc). I just want to keep accurate info out there.

And since I guess you forgot, my name is actually Dennis.

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PROJECTRB240SX
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AND THE RB20DET AND RB25DET ARE DIFFERENT BLOCKS. PRICING ON THE RB20 IS SLIGHTLY CHEAPER BECAUSE THERE IS LESS MATERIAL INVOLVED, THE SOLID CAM UPGRADE IS CHEAPER ALSO.

AREITU
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musicsurfman wrote:AND THE RB20DET AND RB25DET ARE DIFFERENT BLOCKS. PRICING ON THE RB20 IS SLIGHTLY CHEAPER BECAUSE THERE IS LESS MATERIAL INVOLVED, THE SOLID CAM UPGRADE IS CHEAPER ALSO.


I learn something new every day. I thought the RB20s were cheaper because there happens to be a lot more of them and you can turn caps off now.

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PROJECTRB240SX
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I CAN'T I'M AT WORK, BUT I PUT IN FOR A DIFFERENT KEYBOARD.

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PROJECTRB240SX
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OHH I MEANT PRICING ON RB20 PARTS, THE RB20 ENGINES ARE CHEAPER BECAUSE OF THEIR AVAILABLITY AND UNDERRATED POWER.


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