rb26 exhaust manifold

[jrsink]

does an rb26 exhaust manifold fit a rb25?

[S14240RB]

does an rb26 exhaust manifold fit a rb25?

No because the exhaust/turbo manifold for the rb26 is ment for two turbos instead of one

[Joe]

No because the exhaust/turbo manifold for the rb26 is ment for two turbos instead of one

well, where the turbo(s) bolt to the manifold has nothing to do with how the manifold bolts to the head.

but no it does not fit because the heads are different.

[jrsink]

an rb26dett has 2 turbos; you mean the tt is two turbo? really? come on newbie,obviously I was inquiring as to if the rb26 exhaust/turbo manifold would line up/mount properly on an r25 for the purpose of twin turboing an rb25 since the price of this rb25 is so much cheaper than the rb26 and oth have amazingly capable bottom ends.2 smaller ball bearing turbos can kick so much more *** than than one giant snail, as far as drifting and road racing/autox goes. how much do you like lag?

[jrsink]

thanks kamin;

[S14240RB]

wtf was

an rb26dett has 2 turbos; you mean the tt is two turbo? really? come on newbie,obviously I was inquiring as to if the rb26 exhaust/turbo manifold would line up/mount properly on an r25 for the purpose of twin turboing an rb25 since the price of this rb25 is so much cheaper than the rb26 and oth have amazingly capable bottom ends.2 smaller ball bearing turbos can kick so much more *** than than one giant snail, as far as drifting and road racing/autox goes. how much do you like lag?

wtf was I supposed to say? the rb25 has tt? You need to pay attention. I said the manifold was ment for two turbos. Not "the rb26 is a two turbo".You need to stfu ho. The answer is NO anyways
Modified by S14240RB at 8:42 PM 4/1/2005

[Nameless EJ6]

NO. Download the FSM's for the engines and make your own conclusions.

Different heads, different engines.. my deductions tell me they are different bolt patterns. btw, the RB26 has two exhaust manifolds.

Stick with a Honda if you don't know how to do the research.

[Nameless EJ6]

an rb26dett has 2 turbos; you mean the tt is two turbo? really? come on newbie,obviously I was inquiring as to if the rb26 exhaust/turbo manifold would line up/mount properly on an r25 for the purpose of twin turboing an rb25 since the price of this rb25 is so much cheaper than the rb26 and oth have amazingly capable bottom ends.2 smaller ball bearing turbos can kick so much more *** than than one giant snail, as far as drifting and road racing/autox goes. how much do you like lag?

You're coming off as a total retard. Stick around the forums for a while before you attempt to educate. Are you an engineer? Are you going to support your theories or quote the main concensus among other people who know absolutely nothing? How many twin turbo setups have you built or tuned?

[jrsink]

2 manifolds, i know; so what? you are still looking at 2 inline sixes. Most twin turbos (especially the aftermarket manifolds ive seen) utillize 2 separate manifolds.

[S14240RB]

2 manifolds, i know; so what? you are still looking at 2 inline sixes. Most twin turbos (especially the aftermarket manifolds ive seen) utillize 2 separate manifolds.

What do you mean by 2 inline sixes?

[Nameless EJ6]

That wasn't my punchline bud.

[jrsink]

As a matter of fact, I have built and tuned one twin turbo; before my s13 there was a 93 3000gt vr4 pushing just over 400hp with stock turbos and fuel system.dsm trannies end all project cars.

[S14240RB]

As a matter of fact, I have built and tuned one twin turbo; before my s13 there was a 93 3000gt vr4 pushing just over 400hp with stock turbos and fuel system.dsm trannies end all project cars.

realy? cool. what mods did you do to it to get it to run 400hp with the stock turbos? Did you do any modifications the stock turbos? How much boost was it running?

[jrsink]

wasn't much in it at all, after i lost the cats, must have picked up about 30-50 hp, the stock exhaust was really choking it out. It was running a bar of boost, can run much more on stock injectors as is the case for most cars.the vr4 was sick but it was like driving a whale; 4000lbs.

[Joe]

wasn't much in it at all, after i lost the cats, must have picked up about 30-50 hp

so you got 50 hp from taking the cats out

B U L L S H I T

the only way that is possible is if the cats are clogged. no catalytic converter chokes an engine that much. ive flowbenched them. show me dyno proof and ill eat my words gladly.

[jrsink]

Car was never dynoed (of course ); please correct me if im wrong, which im now assuming i am, BUT i was always told that when running just a straight downpipe, no exhaust, no cats, as unrestrictive and free flowing as you could possibly run, one could pick up approximately 3 hp per pound of boost you are running. Therefore 14.5 x 3= ~45hpok, let me have it now...and also, i dont know if this has anything to do with your response, but the car is a 6g72 6, twin turbo, 300hp stock

[Nameless EJ6]

That formula is a joke.

So, you really have no proof of this 400hp vr4?

The vr4 doesn't put 300hp to the wheels in stock form either.

Please, do not attempt to make yourself look smart here. It's only makes a mockery of everyone.

[Joe]

Car was never dynoed (of course ); please correct me if im wrong, which im now assuming i am, BUT i was always told that when running just a straight downpipe, no exhaust, no cats, as unrestrictive and free flowing as you could possibly run, one could pick up approximately 3 hp per pound of boost you are running. Therefore 14.5 x 3= ~45hpok, let me have it now...and also, i dont know if this has anything to do with your response, but the car is a 6g72 6, twin turbo, 300hp stock

no that formula is a complete lie, even if it DID work you did it entirley wrong

you cant assume the car makes 300hp naturally aspirated, because it dosent. lets say it makes 300hp at 10lbs of boost. you then up to 15lbs of boost, you dont do 15x3 you do 5 x 3. because you only added 5lbs of boost.

but the formula dosent work anyway, its a complete lie. just like your 400hp VR4. give me a break dude, dont come on here spouting bull****. it may fly on the DSM forums but not here. eithre show proof or dont say anything.

[TheOne]

the 3000GT VR4 makes 320hp to the engine, looses probably ~30-50 hp because of bein AWD, and yeah its heavy.

as for the mani it wont fit, try gettin an aftermarket manifold for the rb25.

[RMiller]

You guys are about the meanest, fastest to criticize bunch I've seen on Nico. He asked if the manifold would fit, and more of you put down jrsink than did answer the question he asked. So it doesn't fit, fine, end of story. If you didn't answer the question I'm assuming it's because you didn't know the answer.

I have 2 book on turbochargers and forced induction tuning. According to the literature, using 2 turbos on engines a certain displacement and up gives better spooling characteristics. That, coupled with the fact that auto manufacturers chose to use 2 turbos over a bigger single for cars such as the gtr, supra, 300zx, rx7, and others suggests to me that there is an advantage to using twins. (I realize that the rx7 and supra use a sequential setup that can only be had with 2 turbos, but the gtr and 300zx are non-sequential.)

If jrsink replaced the entire exhaust I can definitely see a gain of 30-50 hp. Some of you are assuming he means wheel hp, but he never specifies. You assume, then you attack him, what's up with that? A 400 hp vr4 isn't out of the question, what's wrong with you? If it's crank hp, that's cake. Wheel hp, I'm not sure but it would have to be close, 350 wouldn't surprise me at all.

[S14240RB]

You guys are about the meanest, fastest to criticize bunch I've seen on Nico. He asked if the manifold would fit, and more of you put down jrsink than did answer the question he asked. So it doesn't fit, fine, end of story. If you didn't answer the question I'm assuming it's because you didn't know the answer.

I have 2 book on turbochargers and forced induction tuning. According to the literature, using 2 turbos on engines a certain displacement and up gives better spooling characteristics. That, coupled with the fact that auto manufacturers chose to use 2 turbos over a bigger single for cars such as the gtr, supra, 300zx, rx7, and others suggests to me that there is an advantage to using twins. (I realize that the rx7 and supra use a sequential setup that can only be had with 2 turbos, but the gtr and 300zx are non-sequential.)

If jrsink replaced the entire exhaust I can definitely see a gain of 30-50 hp. Some of you are assuming he means wheel hp, but he never specifies. You assume, then you attack him, what's up with that? A 400 hp vr4 isn't out of the question, what's wrong with you? If it's crank hp, that's cake. Wheel hp, I'm not sure but it would have to be close, 350 wouldn't surprise me at all.

Mean? Me?

an rb26dett has 2 turbos; you mean the tt is two turbo? really? come on newbie,

This was before any criticizm.

[JonPowell]

Mean? Me? This was before any criticizm.

I agree, he got his answer and then got sarcastic with the rest of us.

He gets what he deserves. If he hadnt gotten snippy then he wouldnt have received it in return.

[Nameless EJ6]

If jrsink replaced the entire exhaust I can definitely see a gain of 30-50 hp. Some of you are assuming he means wheel hp, but he never specifies. You assume, then you attack him, what's up with that? A 400 hp vr4 isn't out of the question, what's wrong with you? If it's crank hp, that's cake. Wheel hp, I'm not sure but it would have to be close, 350 wouldn't surprise me at all.

I asked questions because I question his knowledge.. and his answers prove my point.

As a matter of fact, I have built and tuned one twin turbo; before my s13 there was a 93 3000gt vr4 pushing just over 400hp with stock turbos and fuel system.dsm trannies end all project cars.

What building? What tuning? Where's the dyno graphs? Where's a picture of the car? Where is anything?

Obviously.. there isn't any.

Don't defend someone if you're blind yourself. We don't need a large amount of information in order to label someone. There was no quality knowledge in anything he's said in this thread.

30-50hp? At the wheels or not, that's a crock of ****.

So, he's going to continue getting questions and criticism if he keeps attempting to feed us with false information and pretending to know something he obviously doesn't.

[RMiller]

Some of you guys were rude from the start. Saying "no it won't fit because a 26 has 2 turbos" is passively calling the guy an idiot.

S14240RB: You judge too quickly, without even understanding what you're reading. For example, when you said "what do you mean by 2 inline sixes" you had obviously not understood the last post. My point is, you're so focused on criticizing that you no longer read the posts to understand.

Nameless: I hear you, he probably didn't "build" a 400 hp vr4, but maybe he had one and bought exhaust for it and assumed it was 400 hp. Who cares. I already said the rudeness started on your side of the court (as in everybody but jrsink) and that's likely what caused him to get fuming.

None of this would have happened if you guys cared to answer a decent question. Honestly, I searched for the answer to this question before and I couldn't find it; now that it has come up it's sad that people are so unwilling to simply answer it. I guess the age of most of the members on here is starting to show, the maturity level is unbelievable.

[Nameless EJ6]

None of this would have happened if you guys cared to answer a decent question. Honestly, I searched for the answer to this question before and I couldn't find it; now that it has come up it's sad that people are so unwilling to simply answer it. I guess the age of most of the members on here is starting to show, the maturity level is unbelievable.

This isn't the only place to search for information.

http://www.240sxforums.comhttp://www.sk ... zilvia.net

There is RB information on all of those websites. There is also information in the FSM's for both vehicles/engines. The information found in the FSM's is suggestive that these two engines have different cylinder heads. With that taken to account - it's very easy to calculate that it's not possible to place the RB26's manifolds onto the RB25 head. If it were feasible, more people would be doing it.

It was a very legitimate question. You're right about that. It's also common sense.

On another note, there's really not much anyone can do about forum users actively criticizing each other. It will never change.

That's all.

[JonPowell]

None of this would have happened if you guys cared to answer a decent question. Honestly, I searched for the answer to this question before and I couldn't find it; now that it has come up it's sad that people are so unwilling to simply answer it. I guess the age of most of the members on here is starting to show, the maturity level is unbelievable.

You didnt search too hard...

zerothread?id=79096

[RMiller]

You didnt search too hard...

zerothread?id=79096

I searched for this months ago. And you're probably better at searching on forums than me anyway.

And nameless, who cares if information can be found on other sites. He asked a question here, not there.

Be nice! Getting greasy working on your own car doesn't make you a God!

[Nameless EJ6]

Getting greasy working on your own car doesn't make you a God!

"God" was a bad word choice. If you had substituted for "genius" or "pro" it might have seemed more legitimate. Whatever. It was an ungrounded assumption either way. :|

Those listings of other sites were suggestive. I found them didn't I? Then again, this is my passion and I've been actively participating in online forums for years now...

[jrsink]

I can't let this go.

no that formula is a complete lie, even if it DID work you did it entirley wrong

you cant assume the car makes 300hp naturally aspirated, because it dosent. lets say it makes 300hp at 10lbs of boost. you then up to 15lbs of boost, you dont do 15x3 you do 5 x 3. because you only added 5lbs of boost.

but the formula dosent work anyway, its a complete lie. just like your 400hp VR4. give me a break dude, dont come on here spouting bull****. it may fly on the DSM forums but not here. eithre show proof or dont say anything.

alright sir, the car does make 200 hp n/a (this is a 3000gt sl), a vr4 makes 300hp (91-93) and 320hp (94-98). a stock vr4 pushes 9.3psi to achieve these numbers.my vr4 (93-300hp) with a boost controller pushes approximately 1 bar (14.5psi).this is about 5psi more than stock, ok.the math: one 6g73 engine found in both sl and vr4 versions of the 3000gt:200hp @ no boost, the sl300hp @ 9.3psi, the vr4how much hp is created by just 1psi theoretically? get out your calculator dude.1/9.3 = x/100; x=10.75this is 100hp is made with 2 turbos culminating about 10.75hp per pound of boost (10.75 x 9.3=100); one pound of boost is creating 10.75hp, and therefore the 9.3psi is creating an extra 100hp on this motor stock.ok.my vr4 pushed 14.5psi(not unheard of here), this is as high as one may go without fuel system mods.this is about 5psi over stock5 x 10.75=53.75; a 54hp gain from upping the boost 5psi; now a 354hp vr4.ok.add intake, exhaust, high flow cat, downpipethat's: 8hp+12hp+15hp+15hp=+50 more hpalthough i did not have an exhaust or high flow cat, like i said originally, i was just running a straight downpipe only, this being even less restictive and even more flow-friendly than actually installing a $500 exhaust and $100 high flow cat. so as you can see, we have a stock vr4 300hp, with boost controller 354hp, with downpipe ,404+hp now.and thank you rmiller for being respectful and calling it like it was. to repeat him i never claimed 400+hp at the wheels, do you know how much power is lost to the ground in an awd 4000lb car? All of these numbers can be backed up by 3si.org, I was a member for about a year, I know you guys are so great at searching things on forums, go ahead.I just asked for a simple yes it fits or no it doesn't on the rb26 head; sorry i offended whats his name first from orlando. but i think you may have answered tthe question without understanding what the question was. The guy after you responded correctly, with "the manifold being for two turbos has nothing to do with how it mounts on the head" and pointed out your mistake.Im no mechanic but i also dont speak out of my gluteous maximus.I refuse to gain a bad rep this soon into it, i just want knowledge like the rest of yous and i'm sharing what i know. back off. start searching now. and by the way, has anyone ever seen an awd dyno in florida? or more than one reputible one in cali? they are hard to come by. I would like to invite what's his mouth to munch on those words now.

[Nameless EJ6]

add intake, exhaust, high flow cat, downpipethat's: 8hp+12hp+15hp+15hp=+50 more hp

Adding modifications isn't a math equation. WHP or not.

Are you just missing the entire point?

Ya, I did read your entire post. I understand what you're trying to convey, but it won't slide no matter how you compare and contrast to similar cars with similar modifications. There's too many variables.