reving to 9-grand??

[meet07]

Whats needed to rev at higher rpms??? I know that cams are need but what about the valvetrain???

[Logan76]

springs, retainers,valves, your pretty much going to need to think about building your motor, because once you get your head fully built, you might as well build your bottom end while your at it.

[eh?]

Why 9k?

[240sxautox]

Why 9k?

because it's jdm tyte.

[Shocker]

because it's jdm tyte.

all the hondas are doing it!

[Carl H]

got a turbo that can move air at 9k?hope your wallet is deep.

[SeVa-S13]

moar vtech

[rbosacco]

Why 9k?

better question. why not?

[Shocker]

better question. why not?

um well a few reasons. As Carl stated good luck buying a turbo that will push air to 9000 rpms. Most likely will have a huge A/R and be a complete ****ing dog on the street when just driving normal until boost.

Then the valve train modifications you plan on making to allow such abuse at 9k rpm. Granted sure you can rock it out on a stock 26 head, or a 20 head.. but wont be long at all till you start breaking something. This is all forgetting about the oil drive situation.

Your best off buying a very high volume Nismo pump or similar which all cost $1k plus. Your going to have to make sure your bearings are constantly seeing adiquite oil pressure. You might almost be better off with a dry sump setup.. once again more $$$.

Don't forget now your transmisson how long do you expect your gears to stand up to 9k shifts especially with high HP. Oh yeah don't forget the rest of your drive train.......

waste of time money and effort unless you plan to build an all out drag car, or have the money to blow on everything to make it efficient.. and most people do not.

That is why.

If it isn't making power why keep reving?!

[themadscientist]

this is why I wouldCFM = CID x RPM x VE ÷ 3456If I ever built a motor with crazy RPMs though it would be a purpose-built racecar. For the street I would try to cram as much air in as I could in a more sedate range.

[meet07]

I have always been a big fan of high reving vehicles. Maybe 9 is to much but what about 8-8500???I mean I practically have a t4 on my stock b16 at the moment. Yeah the turbo is rated 650hp but she pulls like a mother. I look at it like this. The bigger the turbo the better. For example.....if a huge turbo say t88 hits full boost at 6 grand dont you think it will pull hard all the way up to 9k......I think so. I am planning on building a 500-600hp car. I mean it doesnt matter what car you have we all spend a bunch of money on our cars. Its eaither spend 10 grand in my honda or 10 grand in a rb25det. I would rather spend it on something with alot of potential. eaither way im going to spend alot b/c thats just me.

but define to much money??

[meet07]

the price of buying rods,rings,pistons and bearings would cost the same as me sleeving a b-series motor with rods,rings,bearings and pistons. But if I had a rb then I wouldnt have to touch the block....Right??? I mean its solid right??

[themadscientist]

As long as they don't overheat. What is it, number 6 I think runs hotter than the rest?

[Coolwhip]

I have always been a big fan of high reving vehicles. Maybe 9 is to much but what about 8-8500???I mean I practically have a t4 on my stock b16 at the moment. Yeah the turbo is rated 650hp but she pulls like a mother. I look at it like this. The bigger the turbo the better. For example.....if a huge turbo say t88 hits full boost at 6 grand dont you think it will pull hard all the way up to 9k......I think so. I am planning on building a 500-600hp car. I mean it doesnt matter what car you have we all spend a bunch of money on our cars. Its eaither spend 10 grand in my honda or 10 grand in a rb25det. I would rather spend it on something with alot of potential. eaither way im going to spend alot b/c thats just me.

but define to much money??

.....and does it matter "how much" since either way your gonna spend "alot" b/c its just you?

[eh?]

I have always been a big fan of high reving vehicles. Maybe 9 is to much but what about 8-8500???I mean I practically have a t4 on my stock b16 at the moment. Yeah the turbo is rated 650hp but she pulls like a mother. I look at it like this. The bigger the turbo the better. For example.....if a huge turbo say t88 hits full boost at 6 grand dont you think it will pull hard all the way up to 9k......I think so. I am planning on building a 500-600hp car. I mean it doesnt matter what car you have we all spend a bunch of money on our cars. Its eaither spend 10 grand in my honda or 10 grand in a rb25det. I would rather spend it on something with alot of potential. eaither way im going to spend alot b/c thats just me.

but define to much money??

I don't get the fixation on RPM. Shoot for a HP target not RPM. Find a turbo that matches your configuration and HP levels. Don't stick a T88 on your car if your just looking for 5-600HP when it's 7-800HP capable.RB's have issues with extreme rpm whether it be stock OR built. Achieve your desired HP with the LOWEST rpm you can.

[jdmnancy]

this is why I wouldCFM = CID x RPM x VE ÷ 3456If I ever built a motor with crazy RPMs though it would be a purpose-built racecar. For the street I would try to cram as much air in as I could in a more sedate range.

bro that formula, gets you wat kind of turbo to run, not if its ganna handle 9k rpm, i have a nissan a31 cefiro rb20, i 've gotten my car to 9500k for long time when i was doing the drift compitition , car handles, it fine. but that formula is for turbo, i know this cuz we use it alot at our shop to find out wat people are looking for when they are building a race, drag, drift, autocross car, wat they want to boost, and response for their car, i have more formula, like wat injectors sizing to use, compresstion hieght piston, wat connecting rods to use for turbo or n/a, deck clearnaces, rocker arm ratios, cam degreing, thiers alot to know bout formulas.

[kjlindgr]

I rev my engine to 9500.

[uber95]

bro that formula, gets you wat kind of turbo to run, not if its ganna handle 9k rpm, i have a nissan a31 cefiro rb20, i 've gotten my car to 9500k for long time when i was doing the drift compitition , car handles, it fine. but that formula is for turbo, i know this cuz we use it alot at our shop to find out wat people are looking for when they are building a race, drag, drift, autocross car, wat they want to boost, and response for their car, i have more formula, like wat injectors sizing to use, compresstion hieght piston, wat connecting rods to use for turbo or n/a, deck clearnaces, rocker arm ratios, cam degreing, thiers alot to know bout formulas.

You would sound a ton more credible with proper spelling and punctuation!!Ebonics is not a language!!!Holy sheit that hurts to try and read!

[Chaos the Xile]

8K is plenty high on a RB at high boost setting. If you wanna rev to 9K buy a RX-7 and build a 13/20B finding a turbo like evertyone else said that can flow at that high RPM is gonna cost you a nice penny.

[meet07]

I was thinking about guying one but I dont feel like having a car payment. I think what eh? said suits best. I just like high reving engines. But I always thought that the variable timing on the rb's where somewhat the same as the Honda VTec...???

[Carl H]

8.5k is the sane limit before you get into retarded money just to rev another 500 rpm, just keep that and be happy.nissan vtc is not vtec, vtec is variable lift and duration; vtc is variable cam timing.in the end nissan vtc sucks anyways the cam phasing is only to help low throttle acceration and cruising...most nasty cams kill it off.

[jdmnancy]

You would sound a ton more credible with proper spelling and punctuation!!Ebonics is not a language!!!Holy sheit that hurts to try and read!

sorry, im not perfect like you, i was just trying to help out , but it seems like you are a person with no life and wants to have arguments with everyone.calm down "buddy".

[churro]

This is gonna get interesting.

[rbosacco]

bro that formula, gets you wat kind of turbo to run, not if its ganna handle 9k rpm, i have a nissan a31 cefiro rb20, i 've gotten my car to 9500k for long time when i was doing the drift compitition , car handles, it fine. but that formula is for turbo, i know this cuz we use it alot at our shop to find out wat people are looking for when they are building a race, drag, drift, autocross car, wat they want to boost, and response for their car, i have more formula, like wat injectors sizing to use, compresstion hieght piston, wat connecting rods to use for turbo or n/a, deck clearnaces, rocker arm ratios, cam degreing, thiers alot to know bout formulas.

ok... i have no clue what you said but can assure you that it didn't help. if you do really work at or own a shop i hope that you dont actually talk to anyone like that.

um well a few reasons. As Carl stated good luck buying a turbo that will push air to 9000 rpms. Most likely will have a huge A/R and be a complete ****ing dog on the street when just driving normal until boost.

Then the valve train modifications you plan on making to allow such abuse at 9k rpm. Granted sure you can rock it out on a stock 26 head, or a 20 head.. but wont be long at all till you start breaking something. This is all forgetting about the oil drive situation.

Your best off buying a very high volume Nismo pump or similar which all cost $1k plus. Your going to have to make sure your bearings are constantly seeing adiquite oil pressure. You might almost be better off with a dry sump setup.. once again more $$$.

Don't forget now your transmisson how long do you expect your gears to stand up to 9k shifts especially with high HP. Oh yeah don't forget the rest of your drive train.......

waste of time money and effort unless you plan to build an all out drag car, or have the money to blow on everything to make it efficient.. and most people do not.

That is why.

If it isn't making power why keep reving?!

well on the,turbo- people rev 2liter cars to 10k under boost all of the time, so turbo's that flow to that rpm are out there

valve train- fererra makes everything now for the rb25 head so the parts are out there, and pretty much every gtr that runs faster than a 9 shifts over 10k i'm sure you would agree that if they didn't need to rev that high, they wouldn't

oil pump- dry sump would fix everything but you could fix the crank collar if yours had that issue run a jun or hks or the like oil pump and the restrictor in the head and it would be fine just do whatever you have to to make sure the pickup stay submerged in oil, you might need to make a custom pan or weld up some baffles/ not that big of a deal in a project like this

and transmission? irrelavent, the rb25det box can handle it. make sure you have the proper fluids in it. of you are dumb enough to try to make this much power on a rb20 box its survival of th fittest you have it coming to you for not being too intellegent

so, you made a terrible argument with most of the things you said. the only thing that you said that was pretty much true was

waste of time money and effort unless you plan to build an all out drag car, or have the money to blow on everything to make it efficient.. and most people do not.

see the truth is that it would be expensive, and it would be time consuming to make everything work. but it is do-able. it would make for a much more versatile power range if i could rev my car to say 10k. when i finally do a built motor i will rev it to 10k, it will allow me to run a much larger turbo with much better results. and to clarify i dont have much money but unlike most of you guys my car does run everytime i go turn the key, and i do beat the crap out of it, i did everything on it myself with my spare money. one day i will upgrade the internals, but not till i kill the motor. it lives on the limiter and 7300 just isnt enough at all.

http://www.youtube.com/watch?v=bqrn28mLJfM

[eh?]

see the truth is that it would be expensive, and it would be time consuming to make everything work. but it is do-able. it would make for a much more versatile power range if i could rev my car to say 10k. when i finally do a built motor i will rev it to 10k, it will allow me to run a much larger turbo with much better results. and to clarify i dont have much money but unlike most of you guys my car does run everytime i go turn the key, and i do beat the crap out of it, i did everything on it myself with my spare money. one day i will upgrade the internals, but not till i kill the motor. it lives on the limiter and 7300 just isnt enough at all.

http://www.youtube.com/watch?v=bqrn28mLJfM

So you know it will be very expensive but you don't have a lot of money but you will still do it. I see your logic.

[rbosacco]

So you know it will be very expensive but you don't have a lot of money but you will still do it. I see your logic.

actually what i meant was i dont have the money to build a motor right now, but when i do i'll do it right and i'll be able to rev it like i want to. and what i said was i don't have much money, i didn't say i'm broke. i don't like doing things over and over so i will wait till i need to build a motor and then i will....

[Shocker]

actually what i meant was i dont have the money to build a motor right now, but when i do i'll do it right and i'll be able to rev it like i want to. and what i said was i don't have much money, i didn't say i'm broke. i don't like doing things over and over so i will wait till i need to build a motor and then i will....

typical dreamer.....

I'm not sure if you really understand the extent and the money required for what you want.

BTW I bet the 25 box will break. with 9-10k shifts and 600-700+ hp. Especially if you have a drive train that is sturdy and wont give out. Not to mention throw some slicks on...

Also those 9sec GTR's you speak of, most run dog boxes.

[rbosacco]

typical dreamer.....

I'm not sure if you really understand the extent and the money required for what you want.

none running RB that makes one poor.

its your signature and i'm the dreamer? my car runs! so apparently i understand way more than you.... and the gtr's that run the dog boxes are mainly pro cars. there are alot of 9 sec gtrs out there that still run the stock box in japan and au. you dont give these drivelines enough credit. with the proper fluids in it and not a already trashed trans it would hold up better than you think. when it comes to trans's its mainly all driving technique on how long they last.

[meet07]

^ I like this cat. He knows exactly what im talking about. Im a huge fan of big turboes. Like I said....I have a freaking t4 on my 1.6L. Its has a 70 cold and .82 hot. Yeah it hit full boost around 5500-6000 rpms but when she hit its over. I look at it like this. If I can runn a 650hp turbo on a 1.6 then why not run a 800hp turbo on a 2.5L with a little valvetrain work to push the turbo close to its efficency. I noticed that boost lag is actually a good think. Especially on the street. Im not the one that likes to break traction everytime I floor it. I want a highway monster. That is pretty much the reason im considering the rb 240 swap.

[Carl H]

because lag does not equal fast, ive seen many a races lost because of that.a PROPERLY sized turbo setup will outperform ANY lag monster.consider my setup full boost at 4k revving to 8k, thats a full 4k to work with...and its got a 'large' turbo bolted to the side (gt30r, .78ar twin entry) but still is a street car as it is my daily.blows air all the way to 8k effortlessly and makes great power.revs arent all they are cracked up to be, just because you can do it on a honda doesnt mean its ideal on a nissan, take the 8k redline, size the turbo correctly and be happy.