RB25DETT

[leesredgt]

i was just wondering if this has been done before i know it probaly not practical but i would like to see some pics if has been done and everyones thoughts about it

[StricNyne]

check back with me soon....real soon

[themadscientist]

I'm sure it has been done, nothing earth-shattering. Just mod some 26 manifolds for the two ports with the odd bolt pattern and done.

[Kansei240sx]

SEARCH, and yes, its done all over the place. The RB25DET heads if ported will be able to flow enough air to move some decent ranged turbos. I'm not sure how much different the RB26DETT heads are in size from the RB25DETs but i've read many places and seen flow chart of the RB26DETT and there isnt anything straight 6 that comes close to it.

[StricNyne]

i think flow is VERY similar they posted 26 results in dsport

[s14kouki]

saw one in a magazine a little while back, cant find the pictures tho

[pimpn2326]

I am looking for a S14 with RB25! they are sweet!

[bumblebtuna]

found a caliais with one in it

http://www.calaisturbo.com.au/...13913

[Joe]

i think its completely worthless. why go through all the hassle to do that when 1 properly sized turbo will work just as well and cost half as much.

[themadscientist]

SEARCH, and yes, its done all over the place. The RB25DET heads if ported will be able to flow enough air to move some decent ranged turbos. I'm not sure how much different the RB26DETT heads are in size from the RB25DETs but i've read many places and seen flow chart of the RB26DETT and there isnt anything straight 6 that comes close to it.

*cough*2JZ*cough*most BMW engines*cough*Don't make silly statements like that

[autocrossing]

Twin turbo requires twice the money, twice the install time, and twice the maintenance. I've done it and it was not worth it.

[blues14]

Don't a lot of the Twin turbo I-6 owners upgrade to one large turbo to make big power??

[Darius]

Yes but for the same reasons mentioned above. Upgrading two turbos to larger turbos will run nearly twice as much money as upgrading a single turbo setup.

[jaidedeye]

why not just go with a big single turbo? twins are somewhat oldschool now unless you have some ungodly drag car

[StricNyne]

i am debating if i wanna be flamed to all hell...

[themadscientist]

if being flamed gives you pause then stay in hiding. Do your thing, **** the haters.

[blurrbosi]

I ran twin gt30's for a little bit. 3 cyl per turbo. Didnt see full boost till like 5k though. 26lbs on methanol, aem and stock engine. 550 maxing out the fuel pump. Its cool to do something different. But not cost effective.

[digzsublime]

zerothread/270327

Wow, you could've searched all the way to the middle of the first page in the section and found the answer to your question.

+1 on the not worth it to the average Joe. But hey, if it makes you happy then DOOOO EEEEEET! Let the haters hate. I can see how a properly sized twin set up would give the benefit of great power without all the lag of a big single.

[digzsublime]

*cough*2JZ*cough*most BMW engines*cough*Don't make silly statements like that

Don't take this the wrong way because I know, that you know your stuff.I'd agree that BMW heads flow well. However, I've read/heard from lots o people that the 2JZ heads flow pretty poorly. Now obviously they flow enough to make huge power at 40 psi, but I've heard the 1JZ head actually flows better. My sources could be wrong. It's just what I've heard.

All that aside. If you put a crappy flowing head on top of a rediculously overbuilt bottom end (factory 2JZ), it'll still make crazy power. You just gotta squeeze the air in there a little harder, i.e. 30+ psi. But at that point who cares. The bottom end can handle it, and your driving a freaking rocket with tires.

[StricNyne]

meh, i opted to do the twins to be differant, i originally was gunna run twin mistu 16gs but now i am running the RIPS manifold adapter, with stock rb26 turbos, should keep me happy for a while, i bored and stroked my motor to roughly 2.7 though , only thing i didnt touch was cams, everything else is done up, i will have some pics as soon as the rips arrives, still waiting on mounts from LLC and intake manifold, then there is the whole haltech headache

[themadscientist]

Don't take this the wrong way because I know, that you know your stuff.I'd agree that BMW heads flow well. However, I've read/heard from lots o people that the 2JZ heads flow pretty poorly. Now obviously they flow enough to make huge power at 40 psi, but I've heard the 1JZ head actually flows better. My sources could be wrong. It's just what I've heard.

All that aside. If you put a crappy flowing head on top of a rediculously overbuilt bottom end (factory 2JZ), it'll still make crazy power. You just gotta squeeze the air in there a little harder, i.e. 30+ psi. But at that point who cares. The bottom end can handle it, and your driving a freaking rocket with tires.

I have also heard the 1JZ flows better, not sure if that is true but I have heard it too. If the head won't flow it won't flow. Packing more air into it isn't going to make a great deal of difference if it's constricted. I can tell you most of the savy RB tuners I have talked with don't open up the ports, just clean them up unless they are going for stupid RPMs, the 26 is a good head to be sure.

[Kansei240sx]

I know BMW heads are badass. I am around supra guys here constantly, so i know the differences in the heads. The 2JZ comparatively flows crappy compared to the RB26. The 2JZ is a motor that begs to be single turbo, and the RB26 is a very good candidate to stay twin. Most of the fastest skylines street wise run twins anyways.

[74260zt]

Twin turbo requires twice the money, twice the install time, and twice the maintenance. I've done it and it was not worth it.

Tell me about it..... I didn't realize how much more work I was getting myself into when I chose the twin path.

I went for the WOW factor, and wow does it cost....

[digzsublime]

Tell me about it..... I didn't realize how much more work I was getting myself into when I chose the twin path.

I went for the WOW factor, and wow does it cost....

No doubt. But, WOW your setup is HAWT!!! Not gonna lie to you. I get a little semi-chub everytime I see your engine bay!

[pito2003ac]

yea that car is clean...