*sigh* Torn between CA and RB now : (

[M374llic4]

For the longest time I wanted a CA, but now....when I think about it, after thinking of how F1 cars operate, they have more cyl, but less displacement. like a 2.4 liter V8 gets upwards of 22,000 rpm. at about 720hp D :

So, a RB20 at 2.0 should get more power while Still having alot higher revs then a RB25/6. Get a light weight flywheel and one of those super small clutches and you should have one ruick revving and powerful beast!

Then again the CA is proven to be rev happy, and I am just assuming on the RB. What things are nessecary to get the most revs out of your engine? rocker arm stoppers, but what else?

Am I correct in my theory of the RB? Such a hard decision : \

[nnkfws333]

For the longest time I wanted a CA, but now....when I think about it, after thinking of how F1 cars operate, they have more cyl, but less displacement. like a 2.4 liter V8 gets upwards of 22,000 rpm. at about 720hp D :

So, a RB20 at 2.0 should get more power while Still having alot higher revs then a RB25/6. Get a light weight flywheel and one of those super small clutches and you should have one ruick revving and powerful beast!

Then again the CA is proven to be rev happy, and I am just assuming on the RB. What things are nessecary to get the most revs out of your engine? rocker arm stoppers, but what else?

Am I correct in my theory of the RB? Such a hard decision : \

wow....if you want a high revving engine get a Honda hehee j/pCA's dont have rocker arms and Im pretty sure RB's dont but I could be wrong. I think you are comparing 2 different motors. They share the same design but I mean purpose wise.

Why do you want to rev high? I don't see your purpose. F1 cars are totally different engines and they are designed to do certain things.

[M374llic4]

I didnt before, I wanted a KAT for tq. But then after seeing the CA in action, I was like <3 theres just something about burying the tach past 8 on the cluster that just makes you feel goooood.

No rocker arms? I must be mistaken on my engine termonology then. Hmmm.....That sure does make me feel n00b haha. : \

[f s t caz]

i had the pleasure of hearing an rb20 in person for the first time a week or so ago. it sounds absolutely beautiful with an open downpipe or with a full exhaust. and for whatever reason, in either form its quieter than my CA w/ a full BRM exhaust. very responsive too. If i ever do another swap, it'll be an RB

[float_6969]

A friend of mine's girlfriend just bought an auto RB20 and they both love it. I haven't seen it yet, but he was VERY impressed with it. From what I could hear of it, it sounded great.

[M374llic4]

The main reason I might like the RB is...

http://cgi.ebay.com/ebaymotors...QrdZ1

vs

http://cgi.ebay.com/ebaymotors...QrdZ1

Same price!

D :

I want to run mad boost, and rev high as hell. So either one I think would do me well, but 2 extra cyl is nice : P

Grr....such a hard choice

[mbmbmb23]

The main reason I might like the RB is...

http://cgi.ebay.com/ebaymotors...QrdZ1

vs

http://cgi.ebay.com/ebaymotors...QrdZ1

Same price!

D :

I want to run mad boost, and rev high as hell. So either one I think would do me well, but 2 extra cyl is nice : P

Grr....such a hard choice

Yeah but for the RB you have to buy the custom motor mount kit which is like $300-$500 and there is no USDM parts equivalent as with the Pulsar/CA18DE.

As for mad boost, I wouldnt plan on turning up the boost any higher than you would with a CA of the same tune, you'll need a ROM tune and all the supporting mods same as the CA.

I agree however, the RB exhaust note sounds much meaner than the CA but....personally I'd only consider the RB25.

Word of advice, read all the feedback for those engine shops on ebay. For $750+ S&H I would expect to rebuild it before bidding.

-m

[M374llic4]

I do plan on a rebuild. I do rom tuning my self, and know what all must be done to get the boost I want.

Its just picking the platform that i am fighting with. Though, just for availibility and ability CA is still looking to be my choice.

[SeVa-S13]

i had the pleasure of hearing an rb20 in person for the first time a week or so ago. it sounds absolutely beautiful with an open downpipe or with a full exhaust. and for whatever reason, in either form its quieter than my CA w/ a full BRM exhaust. very responsive too. If i ever do another swap, it'll be an RB

I know for a fact you've heard 2 other RB20's. :-PEven though mine sounded more like a tractor with the open dump tube/O2 extension thingy, Justin's coupe with the Hozigen fireball sounded quite nice.

Oh, and the RB20 will not be good much past 8k without extensive valvetrain and oil system upgrades.

[rico05]

In all honesty, you need to decide to what extent you are planning on taking your car. The RB20 will provide more torque, but is about 80lbs heavier, due to 2 more cast iron cylinders and a MUCH beefier transmission. If you are looking for a highway or drag monster, I say go RB, but be prepared to pay RB prices for parts, as they will all have to come from abroad. The CA is what you want for light track duty or daily as it will be cheaper to install and service, but will lack in immediate power and torque. I really like the RB, in fact when I get around to buying a pignose hatch I plan on a RB20DET swap and around 400rwhp for my toy (that is after my K20 EF hatch that is ).

The RB is a straight six, and benefits from the natural harmonic properties of a I6. They have the same issues with oiling and cooling that all RBs have (and most Nissan engines of that era), but the same can be said of CAs. Really, it all comes down to how much you want to spend, how far you want to take it, and what you will be doing with the car.

I <3 my CA.

[f s t caz]

I know for a fact you've heard 2 other RB20's. :-PEven though mine sounded more like a tractor with the open dump tube/O2 extension thingy, Justin's coupe with the Hozigen fireball sounded quite nice.

Oh, and the RB20 will not be good much past 8k without extensive valvetrain and oil system upgrades.

lololol. i can't remember ever hearing yours actually move though. and i forgot about justins. for some reason i wanted to believe it was a 25 though. oh well. simple fact is that the rb's sound good

[f s t caz]

The RB20 will provide more torque, but is about 80lbs heavier, due to 2 more cast iron cylinders and a MUCH beefier transmission.

i think its the 25 that has the uber heavy uber beefy transmission and not the 20

[tyrannix]

doesnt an RB20 bellhousing bolt up to a CA, or am i smoking crack again.

CJ

i think its the 25 that has the uber heavy uber beefy transmission and not the 20

[89'ClubK's]

Want to rev, eh? buy an RX-7 . I've seen an RB20DE in a BMI video. It would rev quickly and performed great. However the RB20DET has lower compression. What is the bore/stroke ratio? the CA has bottom end torque and top end revs because of its 83x83.6 ratio. The RB20 doesn't have as many options for turbo upgrades because of the T3 flange. Odds are you don't want to keep the factory ceramic turbo. Would you want to keep the factory air intake piping or buy an after-market? ( I like it, but it's a pain to change the plugs!) Do you want to spend the money for the mounts, wiring, and cross member? the CA bolts up and the wiring is the same as an SR20 (1/2 days work). If the car is tuned correctly, you should reach your peak power way befor the redline. If you don't have the money for a rebuild right off, it'd probably be best if it doesn't see the redline.Both engines are great platforms! Good Luck!

[OKRB20DET]

The main reason I might like the RB is...

http://cgi.ebay.com/ebaymotors...QrdZ1

vs

http://cgi.ebay.com/ebaymotors...QrdZ1

Same price!

D :

I want to run mad boost, and rev high as hell. So either one I think would do me well, but 2 extra cyl is nice : P

Grr....such a hard choice

FYI, you're not gettin a transmission OR a MAF with that RB if u buy it off ebay, thats just the motor same price..pfff

[Zero260]

(that is after my K20 EF hatch that is ).

have fun spending almost 10 grand on that conversion. my buddy, who has connections in the industry, priced a whole conversion out to be something like 9800 bucks. and that was w/ a USDM type-S, not a JDM Type-R. so if you're serious about that one, I'd put other bills on hold, like food

oh yeah, rock the CA!

[tecnic1]

What is the bore/stroke ratio? the CA has bottom end torque and top end revs because of its 83x83.6 ratio.

79 bore 69.7 stroke..fairly undersquareQuote » The RB20 doesn't have as many options for turbo upgrades because of the T3 flange. [/quote]plenty of upgrade options for t3 fllanged turbosQuote »Do you want to spend the money for the mounts, wiring, and cross member?[/quote]wiring is not that difficult, crossmembers are cheap

[M374llic4]

I do plan on a rebuild and a rhd conversion if i can get a good clip. So i might save up some more and see what i can get. though it seems to me that CA is still my *****.