i have an rb20 now i love the engine and i would not swap for an sr .. not a chance ... i have an rb26 for the car as well that will go in while im building the rb24 to go back in >: ) .... now rb25 that enigne is only popular because any one can make power with it ... its a tub and has a ****ty rod stroke ratio ... its rb26 or rb20 for me : ) even if i had an rb25 given to me id stroke it and bore to get rid of the rod stoke issues that stop it from reving freely as the rb26 or even better the rb20 ..
the rb20 is not a hard engine to get parts for .. its really easy ...easyer than it is to get parts for an rb25 .. i have not had a hitch getting parts for mine ... cams, valves, and so on ... *my opinion* and based on my dealings with rb's ...
RB20 Owners ???
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NOblingJUSTswing
- Posts: 5
- Joined: Wed Apr 05, 2006 5:29 pm
- Car: 240sx
i would take the 20 over 25 or 26 any day. flame me if u will, but i dont know of any other 2.0 litre inline 6. the throw is so short and revs so quick and high. maybe if i wanted more power i would consider 25 or 26, but for an s chassis, you shouldnt need much more than 400whp. with the money u will spend on any of those other motors, i think the 20 has the most potential. the main reason i originally went with the rb instead of sr is the sound. nothing sounds like inline 6 turbo. just my .02
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BoostFab
- Posts: 3529
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- Car: S13cp, S13fb, S14z
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- Contact:
Re: (NOblingJUSTswing)
you know how it is....people are very greedy...want more and more....NOblingJUSTswing wrote:you shouldnt need much more than 400whp.
if money isn't an issue, built rb26 all the way for me. "gone viper & supra hunting"....
Re: (BoostsFed)
build an rb24 and have wayy more power and rev potental : )
awsome build and engine nissan should have built it and released it : )
awsome build and engine nissan should have built it and released it : )
Re: (mugengsr)
enlighten memugengsr wrote:i have an rb20 now i love the engine and i would not swap for an sr .. not a chance ... i have an rb26 for the car as well that will go in while im building the rb24 to go back in >: ) .... now rb25 that enigne is only popular because any one can make power with it ... its a tub and has a ****ty rod stroke ratio ... its rb26 or rb20 for me : ) even if i had an rb25 given to me id stroke it and bore to get rid of the rod stoke issues that stop it from reving freely as the rb26 or even better the rb20 ..
the rb20 is not a hard engine to get parts for .. its really easy ...easyer than it is to get parts for an rb25 .. i have not had a hitch getting parts for mine ... cams, valves, and so on ... *my opinion* and based on my dealings with rb's ...
how does stroking it get rid of the rod stroke problem. increasing the stroke will only make it worse. you would have to DEstroke it to achieve a better r/s ratio. but its totally unnecessary.
BTW RPM does not equal horsepower. displacment equals horsepower. so who cares if it cant rev to 8000 because it dosent NEED to rev that high.
high strung engines are not reliable.
Re: (Kamin)
unless its a relatively stock honda motor.Kamin wrote:
high strung engines are not reliable.
Re: (lucky7)
i guess i should have been more specificlucky7 wrote:unless its a relatively stock honda motor.
a low horsepower high strung engine is reliable, but a high strung high horsepower engine is not UNLESS you dump some serious cubic dollars into the build.
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dsc4130
Re: (Carl H)
my friends got an rb20 and thats what made me want it. i do most of the work to his car and its not hard to mess with. it takes me about and hour and a half to pull the motor and its got lots of power stock. i cant wait til its tuned. as for the sound oh it made me hard the first time he took me for a ride
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Rookieca18det
- Posts: 354
- Joined: Wed Oct 19, 2005 10:39 pm
- Car: 93 hatchback (ca18det)
- Contact:
*Ahem* Ca18det *Ahem*.... Never been in a rb20 powered anything but I have been in a rb25 s14 and it pulled nasty in its stock form. I have raced a couple of so called fast sr's and really wasnt impressed at all. Thats not to say there arent redicuously fast sr's out there but when so many sr guys talk about the ca like its the slowest thing going and cant beat one its kind of eh... let me not get off topic.
rb> ca >sr (my opinion ofcourse)
rb> ca >sr (my opinion ofcourse)
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themadscientist
- Posts: 26254
- Joined: Tue Nov 12, 2002 3:30 pm
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- Location: Staring down at you with disdain from the spooky mountaintop castle.
Re: (Rookieca18det)
Both motors (CA18 and RB20) are highly underrated often by people with no seat time in a car powered by either one. Powerwise the SR20 is great, my dislike of it stems from it's inferior design and subsequent touchiness and self-destructive tendencies. Quite honestly for the grand majority of us 400hp is enough to get it done and any of them; (CA18, SR20, RB20, RB25, RB26) will do it with good tuning and judicious use of aftermarket parts and or prep. I cannot speak to the KA24, I have never messed with one but people seem to do well with those too. I have never bown an RB20 and I beat machines mercilessly. They may lack some torque but they are great motors. Kind of like a small block chevy. They are not as glamorous as a 454 but a 350 is by no means weak.
Re: (Kamin)
stroke
a stroke and bore will change rod stroke ratio ... and higher revs does mean more horsepower with cams and more volume from a turbo ... displacment does make power yes but ... but so does more volume fowing through and engine at high revs ...... look at a formula1 car .... what kind of power do you think those 3L v10's make at 5000rpm vs 12000rpm ??? i know its not the same but it does prove the point ..
and a high strung engine that is built well will last just as long or longer than an engine that only revs to say 6 or 7k ...
my rb24 will have the rev limit set at 10500rpm to extract the full power potential of the engine and its perfectly square design ...
look at all the high horsepower rb26 engines .. they all rev to more than 10k ....
Kamin wrote:
enlighten me
how does stroking it get rid of the rod stroke problem. increasing the stroke will only make it worse. you would have to DEstroke it to achieve a better r/s ratio. but its totally unnecessary.
BTW RPM does not equal horsepower. displacment equals horsepower. so who cares if it cant rev to 8000 because it dosent NEED to rev that high.
high strung engines are not reliable.
a stroke and bore will change rod stroke ratio ... and higher revs does mean more horsepower with cams and more volume from a turbo ... displacment does make power yes but ... but so does more volume fowing through and engine at high revs ...... look at a formula1 car .... what kind of power do you think those 3L v10's make at 5000rpm vs 12000rpm ??? i know its not the same but it does prove the point ..
and a high strung engine that is built well will last just as long or longer than an engine that only revs to say 6 or 7k ...
my rb24 will have the rev limit set at 10500rpm to extract the full power potential of the engine and its perfectly square design ...
look at all the high horsepower rb26 engines .. they all rev to more than 10k ....
Re: (mugengsr)
if you are increasing the displacment by stroking along with a crank change (where the actual stroke change takes place) you are having to change the length of the rods (if you didnt the piston would go through the head) wich changes the rod angularity (when the crank is paralell to the block the rod is moved farther away from directly up and down) and piston speeds (they get faster. faster piston speeds = more wear and lower max RPM), none of those are a benificial change for max RPM because stroking an engine effiectivley lowers max RPM. not to mention puts alot more stress on the cylinder walls.mugengsr wrote:stroke
a stroke and bore will change rod stroke ratio ... and higher revs does mean more horsepower with cams and more volume from a turbo ... displacment does make power yes but ... but so does more volume fowing through and engine at high revs ...... look at a formula1 car .... what kind of power do you think those 3L v10's make at 5000rpm vs 12000rpm ??? i know its not the same but it does prove the point ..
and a high strung engine that is built well will last just as long or longer than an engine that only revs to say 6 or 7k ...
my rb24 will have the rev limit set at 10500rpm to extract the full power potential of the engine and its perfectly square design ...
look at all the high horsepower rb26 engines .. they all rev to more than 10k ....
"perfect square" = high revving is a myth, its all about piston speed which is based on stroke and rpm.
however, there are only two ways to get power out of an engine (ever mod effects these two in some way). displacement, or rpm. both work on the same principle, more air, more fuel, more power. granted a 500cid spinning to 7k has the POTENTIAL to make more power than a 250cid spinning to 7K, it does not mean it will have the POTENTIAL to make more power than the same 250cid spinning to 11K.
displacement or rpm. displacement is the copout because its cheaper. not because its better. and to debate and conclude which is truelly better would take much testing, much money, and many more pages than any of us are willing to comit to a forum of people who in the end won't care and won't believe the results anyways.
however, there are only two ways to get power out of an engine (ever mod effects these two in some way). displacement, or rpm. both work on the same principle, more air, more fuel, more power. granted a 500cid spinning to 7k has the POTENTIAL to make more power than a 250cid spinning to 7K, it does not mean it will have the POTENTIAL to make more power than the same 250cid spinning to 11K.
displacement or rpm. displacement is the copout because its cheaper. not because its better. and to debate and conclude which is truelly better would take much testing, much money, and many more pages than any of us are willing to comit to a forum of people who in the end won't care and won't believe the results anyways.
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240sxHitman
- Posts: 918
- Joined: Sun May 30, 2004 3:11 pm
- Car: Boosted '91 240sx
- Contact:
Re: RB20 Owners ??? (rb20detsilvia)
even tho im gonna be doin a KA-T, this thread does make me wanna get a RB20...or any RB series motor for that matter
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Yellow4g63
- Posts: 3718
- Joined: Mon Jan 20, 2003 6:07 pm
- Car: 95 Nissan RB20 240SX RB20
91 Nissan NX2000 VE power
95 Nissan 240SX Stock - Contact:
Re: (SeVa-S13)
Thats easy, Jun Oil pump, and Tomie solid lifter conversion and ect.SeVa-S13 wrote:What valvetrain parts and oiling setup are you planning on using to get an RB20 to rev to 10.5k?
Re: (Yellow4g63)
tks yellow4g63 : ) ...
and as for the post above about the piston speeds .. have more bore than stroke will lower piston speeds and stress on the engine . its seems people keep missing what i said about boring as well ... there is not just a change in rod lenght to "stroke" it .. if you went with the same rod and increased the stroke on the crank ... then moved the piston pin to make up for the change in stroke to get that ideal rod/stroke using the same deck height.... anyways lol this is going no where lol im not even building an rb25 ... lol .. and having a perfectly square engine is benificial its not as ideal as having an oversquare .. but having an oversquare engine is most times hard to achieve idealy a stroke/bore ratio of 2.0 or 2.2 would be great lol like a superbikes or formula one engines or something .... look at the honda k series engines for an exampe of a square design its like a happy medium.... and it isnt a myth .. where did you hear learn this ?? are you a mechanical engineer ??
Modified by mugengsr at 5:34 AM 4/26/2006
and as for the post above about the piston speeds .. have more bore than stroke will lower piston speeds and stress on the engine . its seems people keep missing what i said about boring as well ... there is not just a change in rod lenght to "stroke" it .. if you went with the same rod and increased the stroke on the crank ... then moved the piston pin to make up for the change in stroke to get that ideal rod/stroke using the same deck height.... anyways lol this is going no where lol im not even building an rb25 ... lol .. and having a perfectly square engine is benificial its not as ideal as having an oversquare .. but having an oversquare engine is most times hard to achieve idealy a stroke/bore ratio of 2.0 or 2.2 would be great lol like a superbikes or formula one engines or something .... look at the honda k series engines for an exampe of a square design its like a happy medium.... and it isnt a myth .. where did you hear learn this ?? are you a mechanical engineer ??
Modified by mugengsr at 5:34 AM 4/26/2006
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DJButton
- Moderator
- Posts: 4493
- Joined: Tue Mar 22, 2005 6:38 pm
- Car: 2010 Nissan 240sx
- Location: New Hampshire, USA
Re: (mugengsr)
Man, I want an RB in such a big way now!
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RB20DETodd
- Posts: 3763
- Joined: Thu Apr 07, 2005 10:30 pm
- Car: 92 Nissan S13 coupe SE RB20DET
Re: RB20 Owners ??? (rb20detsilvia)
I love my rb20, its pretty quick stock, and i cant imagine till i can get a new turbine/came and PFC on it, great motor, my goal is 350 whp, shouldnt be hard, i mean how much power is useable in a s13.
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Hudsontec
- Posts: 239
- Joined: Tue Jul 05, 2005 3:40 am
- Car: 1989 240SX w/RB20DET, 1991 S13 SE W/SR20DET
Re: RB20 Owners ??? (blk90s13)
inline6 ownz them 4 bangers yoooo
[/QUOTE]
Indeed The RB20 sounds 100 times better in my opinion. Even without a muffler...
[/QUOTE]
Indeed The RB20 sounds 100 times better in my opinion. Even without a muffler...
Re: RB20 Owners ??? (rb20detsilvia)
not sure, my rr20 in uder contruction, I need help with the wiring, one thing I dont regret is going 240.
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nissanparts.org
- Posts: 189
- Joined: Tue Aug 23, 2005 6:30 am
- Car: 1990 Nissan 240SX
2006 Sentra Spec V - Contact:
I like all the motors because over all each one has it own pro's and cons' just like any car. Here is my brake down on each one.
Ca: great head design, iron block, oil squirters?cons: older motor that is easy to find however parts are starting to become discontinued both OEM and aftermarket thus requiring more custom work.
Sr: so many parts and options... its endless with it. head isnt as great as a CA and there is an argument on crank angle sensor verses distributor. also when you start getting into high hp there are problems with the front cover as its known to leak. yeah its not iron and the Sr22 deal doesnt provide a huge help but that depends on what you use the car for.
KA: oroginally ment as a beater engine for a-b work. KA24et is known to have a great standing with SCCA and old motorsports history. KA24Et is very well balanced KA24DET is a pain as its pretty much a;; custom work and the head doesnt allow high cam lift. KA24DET is becoming a new trend thus parts avalibility is growing and so is support. Overall your still going to end up building the motor at some point or another
Rb: the 20 motor is a great point to start off with. After getting the motor to mound correctly and finding a ehxhaust manifold that works in terms of clearance with the car its a great way to start. little harder to find parts if you dont have any help. I find the RB25 to be a holly grail as the 26 is just way too much $$$ but when its an RB you wont find too much wrong with it. just a lot of cash to be spent and it takes up a lot more space in s13's. I prefer a Rb to be in a S14.
balance... get a different car because getting a 50 50 balance is fairly hard. Also rb25 and 26 have a stronger transmission than the rb20's ka's and sr's and ca's
overall just work with what you have currently and learn about the car and from there with your own goals and use for the car go from there on weather you are going to stary with your sr or rb or ka or ca.
ohh yeah inline 6's sound so much better than inline 4 but thats just sound...
Ca: great head design, iron block, oil squirters?cons: older motor that is easy to find however parts are starting to become discontinued both OEM and aftermarket thus requiring more custom work.
Sr: so many parts and options... its endless with it. head isnt as great as a CA and there is an argument on crank angle sensor verses distributor. also when you start getting into high hp there are problems with the front cover as its known to leak. yeah its not iron and the Sr22 deal doesnt provide a huge help but that depends on what you use the car for.
KA: oroginally ment as a beater engine for a-b work. KA24et is known to have a great standing with SCCA and old motorsports history. KA24Et is very well balanced KA24DET is a pain as its pretty much a;; custom work and the head doesnt allow high cam lift. KA24DET is becoming a new trend thus parts avalibility is growing and so is support. Overall your still going to end up building the motor at some point or another
Rb: the 20 motor is a great point to start off with. After getting the motor to mound correctly and finding a ehxhaust manifold that works in terms of clearance with the car its a great way to start. little harder to find parts if you dont have any help. I find the RB25 to be a holly grail as the 26 is just way too much $$$ but when its an RB you wont find too much wrong with it. just a lot of cash to be spent and it takes up a lot more space in s13's. I prefer a Rb to be in a S14.
balance... get a different car because getting a 50 50 balance is fairly hard. Also rb25 and 26 have a stronger transmission than the rb20's ka's and sr's and ca's
overall just work with what you have currently and learn about the car and from there with your own goals and use for the car go from there on weather you are going to stary with your sr or rb or ka or ca.
ohh yeah inline 6's sound so much better than inline 4 but thats just sound...