RB25 or Rb26 ? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

SR20d2fourT · 09-07-2008, 02:37 PM

I'm sure this has gone over before but not in the specifics I would like to hear of.

So, I know first off everyone is probably thinking, " you're an idiot. RB25>26 price yada yada "

Well, this is something that I want to spend plenty of money on and have done right the first time as well as having power looks and the WOW factor so yay.
Anyways, on to my question.

First off, I want something at high boost to put down around 600hp, relatively quick spool reliability and low boost around 450-500.

Would the Series II RB25 be a better choice to achieve this? Twin scrolled RB26?
Also, I don't want to run a crazy high boost and stretch the limits of the engine to get to my desired power levels. Again, being of high power, this wont be as reliable as your NA honda (lol?) but I want it as reliable as possible.

I know the RB26 would be a great candidate but don't want to get it if no need be even considering the wow factor. I don't mind a built RB25 :}

So what do you guys think?

rb25_s13*CHUKI · 09-07-2008, 02:40 PM

rb25 Nuff said... Can make same power as 26 just doesn't have the awesome head flow of the 26..

SR20d2fourT · 09-07-2008, 03:53 PM

Is this the only descrepancy other than displacement? I know there's gotta be more.

I just want the pros and cons of each considering my goals.

Sileighty_85 · 09-07-2008, 04:21 PM

Just do a full build on the RB25 and you should be golden

I met a guy with an Orange Datsun with an RB25 in AL.

He said he was puttin down 500+ W/NOS on a stock headgasket and internals.

SR20d2fourT · 09-07-2008, 06:26 PM

Quote:

Originally Posted by Sileighty_85

Just do a full build on the RB25 and you should be golden

I met a guy with an Orange Datsun with an RB25 in AL.

He said he was puttin down 500+ W/NOS on a stock headgasket and internals.

I'm seriously considering it. I'm just reading along and doing some research on the comp.

Anymore input would be great guys. Thanks.

RB power · 09-07-2008, 07:58 PM

i have a rb25 in my 240 all i got is a front mount an exhaust 10 psi 300whp with a shitty stock turbo t3 crappy but it runs hard i spanked 2 evos on a 2nd gear roll one had 450 one 400whp an my boys sti it has 387whp im just doin a metal head gaskit and a gt37hybrid turbo on it should run 580 to 600whp just fine GET IT RB25DET OR BUY MINE I WAN2 BUILD MY 350Z TOO LOL NO MONEY i got to get some good pics of my engine got things coated now

SR20d2fourT · 09-07-2008, 09:27 PM

haha buy yours?

I still have much research to do. I don't jump into things too quickly.

Shit seems to go wrong too often when I do that.

09-07-2008, 02:37 PM	#1
SR20d2fourT Zilvia Junkie Join Date: Aug 2005 Location: Earth Age: 37 Posts: 403 Trader Rating: (0) Feedback Score: 0 reviews	RB25 or Rb26 ? I'm sure this has gone over before but not in the specifics I would like to hear of. So, I know first off everyone is probably thinking, " you're an idiot. RB25>26 price yada yada " Well, this is something that I want to spend plenty of money on and have done right the first time as well as having power looks and the WOW factor so yay. Anyways, on to my question. First off, I want something at high boost to put down around 600hp, relatively quick spool reliability and low boost around 450-500. Would the Series II RB25 be a better choice to achieve this? Twin scrolled RB26? Also, I don't want to run a crazy high boost and stretch the limits of the engine to get to my desired power levels. Again, being of high power, this wont be as reliable as your NA honda (lol?) but I want it as reliable as possible. I know the RB26 would be a great candidate but don't want to get it if no need be even considering the wow factor. I don't mind a built RB25 :} So what do you guys think? __________________ My opinion gives me redboxes

09-07-2008, 02:40 PM	#2
rb25_s13*CHUKI Post Whore! Join Date: Mar 2007 Location: Cali Age: 35 Posts: 2,759 Trader Rating: (16) Feedback Score: 16 reviews	rb25 Nuff said... Can make same power as 26 just doesn't have the awesome head flow of the 26.. __________________ Obliterate

09-07-2008, 03:53 PM	#3
SR20d2fourT Zilvia Junkie Join Date: Aug 2005 Location: Earth Age: 37 Posts: 403 Trader Rating: (0) Feedback Score: 0 reviews	Is this the only descrepancy other than displacement? I know there's gotta be more. I just want the pros and cons of each considering my goals. __________________ My opinion gives me redboxes

09-07-2008, 04:21 PM	#4
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Just do a full build on the RB25 and you should be golden I met a guy with an Orange Datsun with an RB25 in AL. He said he was puttin down 500+ W/NOS on a stock headgasket and internals. __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

09-07-2008, 09:27 PM	#7
SR20d2fourT Zilvia Junkie Join Date: Aug 2005 Location: Earth Age: 37 Posts: 403 Trader Rating: (0) Feedback Score: 0 reviews	haha buy yours? I still have much research to do. I don't jump into things too quickly. Shit seems to go wrong too often when I do that. __________________ My opinion gives me redboxes

09-07-2008, 07:58 PM	#6
RB power Join Date: Aug 2008 Location: S dub CT Age: 36 Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	i have a rb25 in my 240 all i got is a front mount an exhaust 10 psi 300whp with a shitty stock turbo t3 crappy but it runs hard i spanked 2 evos on a 2nd gear roll one had 450 one 400whp an my boys sti it has 387whp im just doin a metal head gaskit and a gt37hybrid turbo on it should run 580 to 600whp just fine GET IT RB25DET OR BUY MINE I WAN2 BUILD MY 350Z TOO LOL NO MONEY i got to get some good pics of my engine got things coated now