KA24ETT ;)

[GEO]

what if you had a t3/t04 with a .48 a/r / stage 5 wheel and the other one with .68 a/r and stage 5 wheel? WOuld the lower A/R on the smaller turbo spool faster ya think?

[Chezedik]

Either turbo would be too large. The A/R would have to be smaller than .4 on either, then how would you find a suitable compressor wheel that wouldn't be horribly inefficient? It would be a small T3 tops, and even that would produce significant gains in power. I think a pair of T28s would be plenty. But then again, most people (myself included) have no grasp on what 600hp is. Has anyone here done a ten second quarter mile? If there is, I would be surprised to find out that you would be willing to use that car on the street. If you did, I would like to personally call you an idiot. That is just a dangerous amount of power that you do not need on the street. Now if you wanted to dedicate the car to drag racing, then I would say go ahead. But if you think you might even try to drive it to work if your daily breaks down, I think you have another thing coming.

[sohcsleeper]

first off let me say i am sorry about my previous posts i was mad about 2 people that were not trying to offer any assistance just negitive comments

yes i am serious about a twin setup its not going to be a daily driver i have 2 other cars for that

this is going to be my track car and yes i thought about using nitrous to spool the turbos quicker i know i can't make a tremendous amount of boost with a twin setup but i have driven a few cars with different turbo setup's and so far the 300zx was the most fun to drive and i know its a i6 but i also have ALOT of head work done if i can safely rev out to 7500-8000(witch i should be able to) its not entirely impossible to go with a twin setup especially with the right tuning and patience

the built motor is at my uncles garage when everything is together(turbo's, manifold,intercooler,etc...)we're putting it all in at once

i mean im not doubting you guys that a single turbo is more efficient but i have driven 6 different cars with turbo setup's including a nice *** sti and i still think the twin turbo 300zx is way more fun to drive and although it had less power then the sti it deffinatly seemed faster to me anyway

i just wanted to say thanks and i appreciate the help to all the people that tried to help and didnt post negitive **** i wasnt calling everyone ***holes just the 2 ppl that weren't doing **** to help me

i have been reading the forums for about 4 months and so far its really helpful i have learned alot from alot of different people. i just have never liked people that bash other people simply because they didnt know a peice of information. i look at it as if i know this information and they dont im not gonna bash them im gonna try to teach them. just my 2 cents.
Modified by sohcsleeper at 1:14 PM 1/27/2006

[Kaion]

Check this out... http://www.ka-t.org/forums/viewtopic.php?t=9031

[WDRacing]

The inline six that came in the older 300ZX's was a single turbo, the newer 300Z's used a twin setup but that was on a 3.0 VG. The VG30DETT is the engine code. That motor made a large amount of "Q" all by itself. Quite a bit more then the KA. Not to mention the turbo's were EXTREMELY small. So you can see where all the points we've made through this entire thread are valid.

But, since you're building a drag car, I'll help out as much as I can.

You definitly want to use GT30's if you have the extra cash to spend. That would be my pic if you are stuck using the T3 exhaust housing. They are ball bearing and will spool faster while supplying enough air volume to put out 1000WHP in a twin setup.

Lets say for a second you would entertain the T25/T28 exhaust housing. The GT2835R would be awsome in a twin setup. I've seen them used on GTR's over in Japan. They will still be laggy, but not undriveable. So with a nice launch control rev limiter from say MSD you'll be able to boost on the line. Or use nitrous, which I also happen to love.

Either way, you're going to want to build the motor to rev to atleast 8000rpm. SO a perfect balanced rotating assembly and a head thats ported/polished and a new valvetrain are a must. You'll also want to ****cann the stock intake manifold. Which is acually not bad if you have someone that can weld aluminum.

For a drag car, lets push for more the 600rwhp though. A simple single turbo can do that easy. With a twin setup, you might as well go for broke. Aim for 1000 and see where you fall would be my goal.

WD

[teddy]

Andrave never had a twin setup running. He got banned because he was a **** talking loser.

whoops...sorry. I didn't know. I Just found a bunch of his posts and what not when I was searching around.

[crzycav86]

andrave is a pretty cool guy in person. He's just the kind of guy that gets a rise out of people who get their panties in a bunch over the internet

And he ran out of money for his ka-tt project. he's got a ca in his convertible.

[GEO]

Structure240sx is capable of a 10 sec pass and his car is basically a daily

[WDRacing]

And he doesn't drive very well...

[Chezedik]

The inline six that came in the older 300ZX's was a single turbo, the newer 300Z's used a twin setup but that was on a 3.0 VG.

Sorry bud, no 300 was ever offered with a straight six. All of the other Z cars were though, with the exception of the 300 and 350. Hate to correct a mod, but you never know who is searching.

[nismofly]

^^^ z31 was available with an rb in japan

[sohcsleeper]

You definitly want to use GT30's if you have the extra cash to spend. That would be my pic if you are stuck using the T3 exhaust housing. They are ball bearing and will spool faster while supplying enough air volume to put out 1000WHP in a twin setup.

WD

you think a twin gt30 setup could push 1000whp?also i dont know alot about the gt30. how fast do you think they would spool? i think my head should be capable of 8000rpm. i didnt think a fully built ka could handle power like that though. i thought 600 was alot to shoot for but deffinitly doable maybe i could hit 1000 who knows i think its gonna be a fun project and i got my work cut out for me but im going to see it through do you think i can get a twin gt30 setup for $4000 considering im doing the work with my uncle for free he is a master welder he can weld anything he does underwater welding an **** the guy is no joke. and do you think a 150hp wet shot of nitrous would get me into boost fast with a gt30 setup? or any sugguestions on the nitrous kit i want to use to spool the turbo's? what kit is the best for drag? how much? i have around 4k to play with but i have more if i need it.

[crzycav86]

Twin gt30r's would leave you with $2k to play with...

Simply put, $4000 isn't enough for 600hp.

[lrb_2000]

Twin gt30r's + AEM EMS + Innercooler.. you're broke.

[teddy]

no kidding...with only 4k to play with, you'd wind up exactly where lrb_2000 said. Which you say you've got a built block and head already..and free manifold /downpipe and exhaust fabbing and you've got a good start. But theres still much more that will need to go into it. If you really want to make this work, you're really going to need to beef up the transmission and cooling system. If this also is strictly a drag car for the track, then you'll want to look into having your uncle fab you a roll cage.

Also, when you say you've got a built block and head..give us some specifications on what you have done.

[BlackFlag_s13]

ROFL @ you thinking 1000 HP is doable for 4k. Even with your uncle doing labor...

You're looking at 10k at least for 600hp, much more if you'd want 1k. Stop with your bullsh*t and just run a single turbo...

[lrb_2000]

I'm spending over 4k for probably 300whp....

[sohcsleeper]

i said i have more then 4k but didnt want to spend more then that on just the turbo kit alone i have already put over 2500 into the parts for the block and head if i buy the 2 turbos that leaves 2 grand

the ems isnt included in the 4kall that is included in that is mainly the turbo's intercooler injectors fuel rail nitrous kit and fuel pumpi think i should be able to get that for 4k correct me if im wrong

simply put all together im spending over 9000 on the build i think that should be enough, considering none of that money is going into labor at all, to build one hell of a 240sx and should get me nicely to my 600hp goal or more

heh i just got a settlement for a large amount from greyhound so money isnt a problem i just want to do it as cheap as possible while still being reliable

and as to what someone asked about the built block and head mods are as follows

i have 8.5:1 forged pistonsmoly racing ringsnew crower rods & bearingsbrass freeze plugsliftersthe block and crank were hot-tanked and inspected for crackshead and block machined for the copper head gasketnew titanium valve springs and retainersported head and intake manivalvesperformance oil pumpoil cooleretc...

the whole entire block and head(every part) were built for a serious turbo app im kinda tired and its 5:40am so if there is anything i forgot ill update it later
Modified by sohcsleeper at 2:38 AM 1/28/2006

[Chezedik]

I am not sure the factory crank can hold that kind of power, does anyone know for sure? I know I have heard of 500hp cars being built with it, but I would think it would have to give once you are making 250hp per cyl.

[nismofly]

from what i remember youre going to run into trouble with the forged rods around 800 hp, from there youre in titanium territory

[teddy]

well when you get to that 500 hp mark and past...wouldn't it also be a good idea to sleeve the block? Also, would this guy see any benefits from running a v-mount setup?

[nismofly]

im not sure about that, i havent done much research into those kind of power levels because im not a dyno queen/drag racing person, and those kind of power levels with this engine and car on a circuit would rarely work, if ever

wait for Rick, Ivan, Anthony...not sure who else from ka-t.org thats passed 500hp posts here, but they could tell ya

[WDRacing]

Sorry bud, no 300 was ever offered with a straight six. All of the other Z cars were though, with the exception of the 300 and 350. Hate to correct a mod, but you never know who is searching.

HAH...available in Japan...big jerk.

[WDRacing]

Well at 800whp you're doing the ****ing hula...so you'll have alot of other problems besides rods if you get that far. Your rear end is probably going to unass itself before then, D/S will twist, any stock transmission that comes from Nissan will break and you'll need to do some serious suspension work to hook that ***** up.

[Chezedik]

Well, I of course was unaware of that, but I was thinking USDM.

[C-Kwik]

The biggest problem I see with this particular set-up is that you will need to about double the airflow through the motor to be in the turbos' peak efficiency range. Even revving up to about 8000 RPM, you'll end up never even reaching the peak efficiency island. To create more power on the KA with a limited amount of revs, you need to increase boost. 2 turbos is not necessarily the answer. Regardless of single or twin turbos, you will need to get turbos that are efficient at high boost levels and at the airflow rate you the KA will be puming at the boost you run. With 2 turbos, you need two turbos that can run at high pressures and low airflow rates. You'll find it much easier to match a good single turbo with great efficiency at the airflow rates and pressure ratios you need. Using T3 type turbos won't get you there as well, and GT turbos are pretty pricey. It's your choice to make, but you have to look at the bigger picture. I only see a recipe for dissappointment here...

[BlAcK95sE]

it has been done a few times. here are some links. there are alot more of them on honda-tech if you would like to reserach more.

http://www.honda-tech.com/zerothread?id=829839 http://www.honda-tech.com/zerothread?id=850939

[Chezedik]

Makes sense to me.

[BlackFlag_s13]

Oh, As for turbos I just thought about the Twin Scroll TD-05HRA turbo on the Evo's. They're used in rally for anti-lag and they're car's are limited to 2 liters. They spool fast and can supports lots of boost/ and relatively high HP. Cheaper than GT30's too, trouble is probably sourcing them.

Why can't Mitsubishi and Garrett team up and make a twin scroll ball bearing turbo

[shockload]

why in the **** do you want to waste your time and money on all that. its going to be laggy as hell and probally wont even be capable of boosting enough to make any power. if you wnat to do a tt setup i would run some t25s and even then it would be laggy but at least it would eventually spool with those turbos. dont be a dumbass, ive been seeing a lot of uneducated fantasys of whack setups that would never work to be any kind of advantage. twin turbos could be ok if you really know what you are doing but in my belief and experience an sc60-1 could make more than enough boost for 600whp and would spool so much harder than even a set of twin t25s.