sr or rb?
Thread Starter
Registered User
Joined: Feb 2003
Posts: 28
From: Ontario , Can
sr or rb?
I'm gunna get an engine swap( either an RB or an SR) but i wanted to know which one would be cheaper or the best way to go if im going to get a turbo kit? and what are some good turbo-kit websites with the prices?
Registered User
Joined: Feb 2003
Posts: 91
From: Omaha
If I were you I would get the RB25. It is of course going to be a little more expensive, but is totally worth the money. Are you doing the swap your self or are you paying a shop? If you are paying the shop, then they are probably going to charge you allot for the RB swap just because it is a rare swap ( even though the swap isn't hard at all). You can pull more HP from the RB then the SR and it's a hell of allot easier.
Originally posted by DETurbine
If I were you I would get the RB25. It is of course going to be a little more expensive, but is totally worth the money. Are you doing the swap your self or are you paying a shop? If you are paying the shop, then they are probably going to charge you allot for the RB swap just because it is a rare swap ( even though the swap isn't hard at all). You can pull more HP from the RB then the SR and it's a hell of allot easier.
If I were you I would get the RB25. It is of course going to be a little more expensive, but is totally worth the money. Are you doing the swap your self or are you paying a shop? If you are paying the shop, then they are probably going to charge you allot for the RB swap just because it is a rare swap ( even though the swap isn't hard at all). You can pull more HP from the RB then the SR and it's a hell of allot easier.
It actually balances out with the weight of the RB block in the Silvia. Remember power to weight ratio, yes the RB yields higher HP, but with the weight of the RB on the front end of the Silvia, it balances it out. In this case, I would go with the SR since it was originally designed for the Silvias. Weight is balanced out for the Silvia chassis, and u can tune the SR to match the RB's power by doing a few upgrade mods to ur turbo
Also, for the RB swap u need modifications to the Silvia frame in order to swap it in... yes it fits in nicely, but the mounting still needs to be modified, where as the SR fits in without any mounting mods. Also, for a RB to be used in the Silvia, u need a custom drive shaft, rear differential and drive axels to support the torque and power stress.
In this case I'd recommend the SR. I wanted the straight 6 power... but the weight jus nullifies it all out, and both engines are back on the same playing field.
Yes, I researched too much. L0L
Registered User
Joined: Apr 2003
Posts: 20
From: Ca
Ya its acutally hella tight that you researched that. Cause i was going to get a rb25 until i read your post. I would actually like to hear more on the weight distrubtion thing. And ya replacing all that stuff isnt worth it.
Contributing Member
Joined: Feb 2002
Posts: 1,841
From: NY
Night says on his site that you can use the stock GTS parts for the drivetrain and mounts. Also the weight difference should throw you off maybe 1 or 2 % which would be like the difference your gas tanks makes empty or full.
Originally posted by I'm with Stupid
Night says on his site that you can use the stock GTS parts for the drivetrain and mounts. Also the weight difference should throw you off maybe 1 or 2 % which would be like the difference your gas tanks makes empty or full.
Night says on his site that you can use the stock GTS parts for the drivetrain and mounts. Also the weight difference should throw you off maybe 1 or 2 % which would be like the difference your gas tanks makes empty or full.
can u link me please???
and to jkfreshdaddy, send me a personal message and I'll give u my AIM SN and I'll explain about power to weight distribution... u'll be surprised at how many HP a 600cc bike has L0L
Contributing Member
Joined: Feb 2002
Posts: 1,841
From: NY
NightXCZ77 is a member on this board who installed an RB25 in his S13. Here's the site. http://240skyline.nissanpower.com
He only tells u about the sitting weight... I guess wut the ppl I been talkin to are saying is the moving weight... I guess thats where the engine is too heavy for the Silvia... most ppl say its a good engine for drag, but they say go for SR for the curvy roads (Drift!)
, but what do you mean moving weight?
Contributing Member
Joined: Dec 2002
Posts: 578
From: Arizona
What's really funny here is that the RB25DET weighs the same as a KA24DE auto....it's about 60 pounds heavier than your KA manual. This engine hardly throws off weight distribution at all...curb weight and moving weight. I know from experience, I drive one. If you are concerned about the 60 pounds, I recommend you relocate your 40-50 pound lead acid battery. The RB also sits lower in your engine bay than the stock KA or even the SR which lowers your car's inertial center of gravity actually improving your ability to corner.
Research you may have done, but driving and experiencing you have not. The RB will always outmatch the SR. Someone said you can have the SR to match the RB power with a few mods....why spend 1500 on mods to match RB power? You're making up 75 wheel hp when you consider SR and RB25. The RB25 can see oveer 300 WHP without even turning up the boost and it can go over 500 hp on stock internals with 20 psi....once again here your answer is clear.
As far as the mounts go: you don't need custom mounts and there is NO modification to get it to fit your 240SX. Using the Skyline cross member and engine mounts, you are set....that's all you need minus the custom driveshaft. If you are worried about the shaft, go with a RB20DET which uses the exact same shaft as the KA and SR. The RB power to weight doesn't balance out with the SR power to weight, the RB greatly exceeds it and will exceed it all the way up to 1000HP....I guess you hadn't done as much research as you thought huh? Don't mean to sound a dick or flame, but I hate people giving out wrong info.
Night
Research you may have done, but driving and experiencing you have not. The RB will always outmatch the SR. Someone said you can have the SR to match the RB power with a few mods....why spend 1500 on mods to match RB power? You're making up 75 wheel hp when you consider SR and RB25. The RB25 can see oveer 300 WHP without even turning up the boost and it can go over 500 hp on stock internals with 20 psi....once again here your answer is clear.
As far as the mounts go: you don't need custom mounts and there is NO modification to get it to fit your 240SX. Using the Skyline cross member and engine mounts, you are set....that's all you need minus the custom driveshaft. If you are worried about the shaft, go with a RB20DET which uses the exact same shaft as the KA and SR. The RB power to weight doesn't balance out with the SR power to weight, the RB greatly exceeds it and will exceed it all the way up to 1000HP....I guess you hadn't done as much research as you thought huh? Don't mean to sound a dick or flame, but I hate people giving out wrong info.
Night
Contributing Member
Joined: Dec 2002
Posts: 578
From: Arizona
One last thing about all you kiddies and your weight distribution issues (we're not talking HONDAS here), keep this in mind: How often do you ride in your car with a friend? Or friends?
How many of you can feel the handling difference when you have a friend in your passenger seat? That's right, there shouldn't be one of you that can answer yes unless you are a pro circuit driver in a car that has every weight reduction possible and precision engineered suspension.
That friend of yours is adding 150 pounds more to the front end of your car and yet you can't tell a difference in driving or handling....why is this? It's because the way the 240 is designed with the RWD and independent rear suspension, you should be able to add a few hundred pounds without sacrificing any performance. It also allows the front and rear to become closer to 50/50 which is ideal for cornering. Just something to think about.....
Night
How many of you can feel the handling difference when you have a friend in your passenger seat? That's right, there shouldn't be one of you that can answer yes unless you are a pro circuit driver in a car that has every weight reduction possible and precision engineered suspension.
That friend of yours is adding 150 pounds more to the front end of your car and yet you can't tell a difference in driving or handling....why is this? It's because the way the 240 is designed with the RWD and independent rear suspension, you should be able to add a few hundred pounds without sacrificing any performance. It also allows the front and rear to become closer to 50/50 which is ideal for cornering. Just something to think about.....
Night
Thnx Night, I am still learning (and Im jus using the knowledge the ppl I go thru give me... but thats why we all keep learning, no one ever stops learning in life hehe)
In this case, I would like the RB, but I cant afford the price of parts and installation. And personally, I dont have that many sources to buy parts for an RB here in Sacarmento if in any situation where if I mess up the block... there is one place in Sac, but from what I hear, they sell damaged blocks from burned cars, front end collision, etc etc...
Plus Im getting a free SR from my cuz I jus have to get some parts (ECU, elec boost gauge, oil pressure gauge, turbo timer and prolly a new clutch) I'll take pics for u guys when Im done! hehe...
Ok, gotta go, hope to hear from u guys later on.
In this case, I would like the RB, but I cant afford the price of parts and installation. And personally, I dont have that many sources to buy parts for an RB here in Sacarmento if in any situation where if I mess up the block... there is one place in Sac, but from what I hear, they sell damaged blocks from burned cars, front end collision, etc etc...
Plus Im getting a free SR from my cuz
I jus have to get some parts (ECU, elec boost gauge, oil pressure gauge, turbo timer and prolly a new clutch) I'll take pics for u guys when Im done! hehe... Ok, gotta go, hope to hear from u guys later on.
