SR20DET vs RB25DET

[DeltaSteve]

yeah, the RB25det is definately good for more than stock boost if you know what you're doing. if you want to get really far with it, you can swap in internals from an RB26, but since you're comparing costs too, that wouldn't exactly work. from what i understand, the CA18 is not nearly as good as the SR, but i don't know as much about that engine. my recommendation is if you're going for $5000, go with the SR

[SeVa-S13]

Although older, the CA18 is an extremely capable motor and just like the RB has a strong Iron block and was made to take boost. Nissan actually stopped producing the CA18 because it cost too much to manufacture such a well-made engine and instead, switched to the ahem, more "cost-efficient" SR.

Just FYI.

[Aries]

fagtard...LMAO!

Anyways, the RB25 is defintely the way to go in this choice, but with only a $5k budget, you're not gonna be making 400hp.TO make real power with the RB25 you have to upgrade the turbo, $600+ for a new turbo, upgrade the internals, $900+ for RB26 or $500 for Arias pistons (low compression/forged), and then do all of your normal mods. FMIC, 80mm exhaust, etcetera.

[WDRacing]

Wait, so a smaller, cheaper-made, aluminum block engine has more potential than the RB since when? Even completely stock, the RB series has ridiculous power handling capabilities, plus the advantage of 2 more cylinders.

Man, where's WDRacing when ya need him?

Looks like I need to visit 240 Gen more often. If I had 5000 bucks I'd build a very nice KADET that would easily run 21 psi and retain the daily driven quality's. Thats an easy choice. If I were going to do a swap I would never drop in an SR20. I'd go with the RB26 or RB25. Depends on what you want to spend.

As far as the RB series not being able to boost without replacing the internals...thats the dumbest thing I've ever heard. I ran 28 psi through my RB20 without touching the block once. The RB25 would be slightly less do to the higher CR but not much. Oh and all I did to the fuel system was add an Alky Kit.

WD

[96240inNOVA]

Stock SR20 vs Stock RB25DETFront Clip Price - $2250 anywhere vs $3250 Night7Power - ~180rwhp less tq vs ~240rwhp more tqWeight - 100lbs lighter vs 100lbs heavierSwap Difficulty - 5 (wiring harness) vs 6 harness,crossmemberCompression - 8.5:1 (I THINK) vs 9:1 (I KNOW)

Modified SR20 vs Modified RB25DETStock Turbo Flow - ~260rwhp vs ~ 275rwhpStock Internals - ~300rwhp vs ~ 390rwhpMaximum Power - 500rwhp vs 700rwhp

Note for all of this, besides maximum power levels, I was conservative. Any motor you get came out of a performance car in the land of drifting and highway racing, so they WILL be down on power from when they were new. As far as swap difficulty, if you are alreadying swapping a motor, a crossmember is EASY.

[AZhitman]

toki - I gotta chime in here.

Brotha, I just read this thread front to back, and a few things come to mind:

One, you don't need to call names - That's a sure way to piss people off, and to get banned. Let's keep it civil.

Two, no one has to "follow directions" like you say - You asked for opinions or knowledge, and you DID set some parameters, but people have a right to respond as they see fit. We (mods/admins) will intervene if there is MISinformation. That didn't happen.

Three, right after you asked for info, you went into a lengthy discussion about turbos for the benefit of Killa, off topic. Good info, and he's appreciative, but I thought this thread was about you wanting info on which swap to do?

Four, it's just not cool to throw down attitude, esp when you're new AND are still shopping for the car you're asking about.

Let's chalk this up to youthful exuberance and an overabundance of testosterone and start over - Cool?

Thanks for your help - Carry on!

p.s. When you coming to Phoenix?

[Repo Man]

What AZadmin said...

[WDRacing]

Jesus, they make him an admin and he thinks he has to use big words and stuff now. Dude, you actually just said youthful exuberance, in the same sentence with overabundance of testosterone...your so old. Luv ya.

WD

[AZhitman]

LMAO - Guilty as charged, WD.

[toki]

Heh yeah...i know i was being an ***. I've been in a bad mood lately. A very good friend of me got tagged for racing 2nd day with his license and I almost feel responsible seeing as we were trolling for races 20 minutes prior but he dropped me home, and it really kind of ****ed up his situations. I know it's not a good excuse but yeah. sorry. =\

thanks to those of you who gave some good input, and Hitman i'll see what I can't do about comming up there once I get the 240. I'll strap a 150shot cold kit of NOS on there and take you on!!~~

[Repo Man]

I'll strap a 150shot cold kit of NOS on there and take you on!!~~

Be sure to get the carnage on video!

[Nathan]

cold kit? I think you mean a wet system...if you spray 150 dry, bye motor...actually, it might go bye on a good wet system too with that much N20.

[toki]

yes, i was being sarcastic. I think whether its wet dry hot or cold a KA isn't taking 150 any which way.

[Nathan]

Talk to Aries about that It's happened before...and lived...it's just rare and has to be done right...

[SeVa-S13]

Aries did much more than that, on more than one occasion.Tune yer **** right and it's downright scary the kind of power an iron block can hold.

[Exar-Kun]

imma chime in because if I dont WD will say it:"boost is boost, regardless of source, turbo nitrous or supercharger." essentially, the onyl difference lays in how those mechanisms make the boost, and how you have to fine tune them because of it.

also, I dont think anyone refuted the 14 second KA talk. CHris mays KA ran 438rwhp, 503 crank HP accoutning for a 15% drivetrain loss. I've never seen it run a strip, but I did see him light more than a few porshe turbos, corvettes, and even a viper once....Im pretty sure he was in the low 13's at LEAST.

anyways, Im debating this issue myself, I am kinda not liking the SR, becuase of problems people run into around 300hp or so, having to do relaly complex engine things to make it reliable and such(seen two blow up recently, one at 330hp, the other blew its head at 367hp) where the CA may lost displacement, its got a helluva engineered design going on, and is much more(to me) boost-sound aht well engineered than the SR.

the rb26...well...its an rb26, its costs to mod it like an rb26. Low budget is NOT an option with THAT engine....hell even "decnt" budget isnt good enough.

RB25, already discussed enough.

KA-T see above, I happen to know of, and have seen, 3 KA-T's making over 300hp reliably, with no problems. TWo of those are on stock internals at 90k miles.....hah. Realistically, I like the KA, mostly because of its displacement, torque band(short intake runners) and that fact its IN THE CAR ALREADY!

hehe-chet

[Onizuka]

who ever said that an engine has a max horsepower, there is no such thing as a definate maximum horsepower. saying "it has a max horsepower of 400" makes you sound like a jackass....

I dont know why WD is so anti-SR but i know he has his reasons having actually had all sorts of 240s with various powerplants. Im still going SR cause it is a lowcost option to make the power i want and be a little difforent than other people around me.

I think that RBs are the best nissan engines around. Expensive yes, but still the best. If i were older and actually had the money to do a RB swap i would definatly do it.....

[WDRacing]

Don't hate SR's...I can just build a KA and make more power for cheaper then I can with an SR. If I was swapping I'd actually not go with the RB either. I'd use the 3.1 L series stroker with a set of twin screws. I priced it out and could have it built completely forged and balanced for just under 6 grand. We're talking about an engine that will puke up 300 ft pounds of torque at 2700 or so rpm and only get better from there. The the boost kicks in...lmao. I'm gonna build one just cause.

WD

[lessthanjakejohn]

so your not the only one thinkin about an L