rb25det vs sr20det

[Doomed2Walk]

I swear when I was surfing around today, I saw that the price on a rb25det motorset was $3500 on the Mckinney website. If I can get the motorset for that price, should I go with the rb25 rather than the sr20? Someone please list pros and cons.

[Oatmealman]

pros of an rb25,fast,awd,turbo'd,

cons, lots of modification work that will take a while to complete,have to get new transmission,have to get skyline axles to handle the ponies and you rear wheel drive will be gone unless you leave the front drive shaft of the rbtrannie unhooked than it would be like havin a 500 pound friend sit on the hood while you drive,have to upgrade suspension.

[Doomed2Walk]

it's an rb25det off the r33 gts-t so it's rwd i believe.

[Oatmealman]

yeah maybe it is i can't remeber let me find out

[0range_240]

its out of the GTS-T so it would be RWD like doomed said. only the GT-R's were AWD.

I dont know what you mean by lots of "modifications" whether that be performance or installation, but all you really need for installation is motor mounts and a custom x-member. Also the RB25 transmission fits fine, its the RB26 that cannot be used.

And the RB doesnt weight very much more than a CA or SR so upgrading the suspension would not be nescessary unless of course it was to improve handling, not compensate for the weight. If he was talking about a VG30DETT that would be a different story.

[SeVa-S13]

pros of an rb25,fast,awd,turbo'd,

cons, lots of modification work that will take a while to complete,have to get new transmission,have to get skyline axles to handle the ponies and you rear wheel drive will be gone unless you leave the front drive shaft of the rbtrannie unhooked than it would be like havin a 500 pound friend sit on the hood while you drive,have to upgrade suspension.

Dude, c'mon. I coulda swore we covered you being full of crap and not knowing wtf you're talking about. Please do us (and the eager noobs especially) a favor and disconnect your keyboard.

*Sigh* Now on to fixing the misinfo.

RB25 is RWD. The transmission will work fine. No axle upgrade is needed. A new driveshaft is, and probabaly motor mounts unless you wanna use the Xmember from the R33 and you have an S14, but I have personal experience with either. Your suspension will be fine.

There, I tried to correct what I could make out of what he typed. And that being said, just go SR.

[0range_240]

I concur

*phew* So im not the only one who thinks he doesnt know anything? thats a relief, I was sort of suspicious by what he said in my post. an auto SL running a 15.9?? wow he must've had stickerz and nawzzzz

[240DRFT]

check out the rb forum. they have threads up about swaps always, they can help u out.

[PalmerWMD]

Doomed:

I am no expert and you might wish to check our RB engine forum as well, but most SME's say the install is much harder and time consuming for any RB vs an SR.

Also you will need new engine crossmembers ( McKinney has 'em).

And the harness will be much harder for an RB

Ultimately RB's have a greater potential than SR's but properly sorted SR's run as strong as 400 hp reliable, which is all I can think of ever needing.

RB will need less mods, to get to that level, and can go beyond easier, but again is a harder install that costs more $$ in parts and labor.

Again I am no expert but details can be had on our NICO RB forum where you will find some RB install threads if you look around be sure to read a few of those.

Fred...

[Oatmealman]

yes he was running nawzzz orange_240.

[Doomed2Walk]

haha thanks guys. i think i will stick with the SR, less trouble and all but i just wanted to stick out from the crowd a bit ;] yeah the part about the rb25s being awd kind of freaked me out a bit.

[jEzTeR]

Nothing wron with wanting to stick out from the crowd. I say go for the RB so we will have more Skyline motors in the US.

[Doomed2Walk]

*sigh* if only money were NOT the main issue ;[

[fito]

Have you heard the sound of a RB25 engine at 8000 RPMs????

Don't, because if you do, you'll end up with one. believe me!swaping a RB, honestly it's not that hard .

[NotDave]

dont forget about the RB20. it can be had for 1200 and doesn't require mounts or a driveshaft. just a lil trimming or shimming of the hood and a lil grinding of the downpipe(sometimes).

[rb250sx]

The RB swap really isnt that complicated at all, the engine looks like a monster in the bay, it sounds like a beast even at idle, and its well worth a little extra coin. check out the RB forum and click on the stickey for 8 step wiring. scroll to the bottom of open sources post where he has a link to him starting his rb25, that should settle your decision. Also the rb forum is full of info on the swap, you will find your help there.

[Dattebayo]

No doubt, that sounds awesome!!!Wish i had some dough to throw at one of those! even if i sold my sileighty i couldnt come up with 5K...

[turtl631]

Yeah I've been reading a lot of info about this and if not for my parents refusing to let me swap, I'd be tempted by the RB20. It fits more easily than the other RBs but still has that nice high redline...and its a 6 Duh!

[180fan]

dunno about the point of having a 6 banger that's only a 2.0L though. If you're gonna do an RB, do the 25.

[hannibal]

^ummm, the install cost of rb20 vs rb25. for the extra $600+ (driveshaft, mounts) it costs to install the RB25, you can start modifying the RB20.

[SeVa-S13]

^ummm, the install cost of rb20 vs rb25. for the extra $600+ (driveshaft, mounts) it costs to install the RB25, you can start modifying the RB20.

Please stop applying logic for those who can't do it themsselves--just let them go SR.

[rico05]

According to sport compact car. the RB25DET that they swapped into an S14 was 180lbs more portly than the KA. Neither engine had accessories on it, but had trannys. That is like having your buddy sitting on your engine as you drive. No big deal for straight line, but for handling I bet it is a pain to compensate for. I am a big fan of light, stout, powerful 4s myself.

[eh?]

According to sport compact car. the RB25DET that they swapped into an S14 was 180lbs more portly than the KA. Neither engine had accessories on it, but had trannys. That is like having your buddy sitting on your engine as you drive. No big deal for straight line, but for handling I bet it is a pain to compensate for. I am a big fan of light, stout, powerful 4s myself.

The biggest reason why it's 180lbs more is because of the larger much more stronger tranmission. That's a plus over the SR,KA and RB20.

[[Zero-S]]

I concur

*phew* So im not the only one who thinks he doesnt know anything? thats a relief, I was sort of suspicious by what he said in my post. an auto SL running a 15.9?? wow he must've had stickerz and nawzzzz

My auto SL ran 16.8 in economy mode. Pos.

[Doomed2Walk]

yeah, SLs are teh sux.

[PantherRacer]

so, RB and SR=good, I really don't give a damn as long as I can get one...so how do you balance the suspension to try and even out the weight difference of the RB?

& one thing I always wanted to know...is there an awd 240/silvia? can there be? and how (if so) I think I saw somtthing about it but can't find it (if I really did see it)