twin turbo?

[mys13240]

i was wondering if any of you guys have a tt setup, have seen a tt, or have though about it. i think it would be awesome to have a ka24dett.

[andrave]

check my page out, http://www.sounddomain.com/id/andraveall my information was just updated with some pictures of my parts on page 6...I am hoping to have it all in my the end of May.

[BomexS13]

thats badass man..keep us updated

[Tictakman]

how are you gonna do your downpipes? and the o2 sensors, or are u just gonna have one? also what about the oil lines? will there be enough pressure for two turbos?

Zak

[C-Kwik]

I think it would be a waste of time. It can be done, don't get me wrong. But I just see no point to it. There is no response or power advantages to this unless you have so much airflow that the choice of turbo is limted to those that may not be as efficient or not even available. But being that the KA is relatively small, I do not forsee any problems running into a limitation of choice or airflow for that matter. Unless of course you are planning to achieve some 2000 HP.

[Tictakman]

would there be an advantage of using a small t25 turbo and then using a t3/t4? or is there no way that would work unless it was sequential.

have u thought about sequential turbos?

Zak

[andrave]

I'm not saying c kwik is wrong, I just wanted to try something different with my car. I'm hoping either get some stock skyline turbo elbows or turbo outlet weld flanges and weld my own 2.25 into 3" downpipes to clear the steering shaft. There is plenty of oil pressure to support twin turbos. For the o2 sensors, I was either going to weld a bung into the downpipes or look into eliminating it, I'm not sure if I could do that or not.

[Tictakman]

i wonder if you could only use one still. just have it before the cat but after where the two downpipes meet.

just an idea

Zak

[MikeMurphy]

Its definitly something different andrave

[mys13240]

Is your system going to be sequential? i think there would be no point unless it was. i am looking at doing a sequential system on my ka24de. it is gonna be bad ars. :ylsuper I have been researching about alot and plan on doing it before school is out. i have started to get parts.

[andrave]

I don't see the point in sequential, the oems never really got it right and they invested thousands of dollars in it. I've seen plenty of shade tree fellas give it a shot but no one has even come close to cobbling something together that was worth anything. Parallels are a lot easier. Its really nothing revolutional, its just like running one larger turbo but instead its two (very) small turbos. I'm not going for crazy HP or low lag, I just thought it was a fun idea. Good luck with your sequential idea, I'd be curious to hear how you are going to set it up. There was a post in "forced induction" about sequentials and we all thought for a bit but no one really came up with much. Its a mixed bag, a compromise one way or a compromise the other...

[Charlie240sxt]

That and the Ka raps out at 6k so no real ponit ther ether when you can get spool by 3400 with the right turbo and way racing you do below that SORRY 6400rpm for s14 and like 6700 for s13

[mys13240]

i think that you could just get a big turbo instead of two small ones . i like sequential b/c you use the small primary and a big secondary so then you dont have turbo lag, and you have maximum boost throughout the rev range.

[hannibal]

If plumbing two turbos isnt hard enough, i would imagine sequential turbos would be a PITA.I'm interested to see how your project turns out Andrave

[Charlie240sxt]

Your only goin to lag for a sec, and it would only be in the gear you start racing in anyway. After you get the boost it stays ther for the most part. After you shift ther still boost ther and most of it if not all of it depending on how much boost you run. So whats the ponit in all this troble? When i can have a car just as fast with less crap to deal with and lighter.

Guess i need to stop posting RIGHT after wakeing up

Less money in a single turbo then a Twin also

[andrave]

dude, what?

[mys13240]

i want to do sequential tt b/c i havent heard of anybody doing it yet. i think it is gonna be sweat. the reason why the car manufacturors didnt get the tt done right is because they used 2 of the small size turbos that werent matched to the engine perfectly. THey also had a bunch of crap they didnt need on the system.

[andrave]

thats because, as complex as those systems are, they basically do one thing. one turbo, one closed off... bwwhhhaaa and boost builds, and the second turbo comes on. I believe that the porsche 959 used one small turbo and one large turbo. not sure, you might want to look into that as homework.

[C-Kwik]

the reason why the car manufacturors didnt get the tt done right is because they used 2 of the small size turbos that werent matched to the engine perfectly. THey also had a bunch of crap they didnt need on the system.

I disagree here. It's not that they didn't get it right. They just have more limitations than a typical tuner does. They are not just looking at HP. They have to think a lot more about drivability, gas mileage, emissions, reliability, cost, etc. We as tuners tend to be willing to give up some of that and this opens up many more options.

[mys13240]

hey andrave

hows that tt project going?

[andrave]

slowly, thats for f'in sure. I've had some personal problems of late and I sold my hatchback.I've got a gold coupe now with a cracked head so I'm probably going to forgo forged pistons and see if I can get JWT to tune my ECU for twin DE mafs and msd 50 lb injectors. I'm not sure if they will or not, if not I still need a damn Z32 mafs but I'm not willing to pay 120 bucks for it, thats rediculous.Someone told me the stock wastegates on the GTR turbos are 7 psi, someone else 10 psi. So I'm not even sure how much boost I'm going to be running. And I still can't find a pair of output flanges for the GTR turbos. I've emailed just about everyone, the only one with a set that I can find on the web is HKS and its around 400 dollars for their pair of output elbows, and I just don't have that kind of cash with me now. I really need to find a sailor or something stationed over there who can yank the stock intake/exhaust elbows off for me who doesn't want my firstborn child for em. That way he should ship them apo too and save money. Anyway thats the summary of my project so far. The big trick WAS going to be missing the distributor with a twin top mount manifold but I decided that going with stock GTR turbine exhaust elbows would make like easier (though so far it hasn't, its certainly more promising than trying to find custom top mount GTR T25 manifolds!) and now I'm trying to figure out how to miss the steering shaft with the second turbo's outlet. bottom mounted, they should be low enough to miss the distributor completely. If JWT can't tune the ecu for twin ka24de mafs I'm going to run a single Z32 mafs with the stock plastic splitter and two 90 degree elbows and toss it in a sheetmetal box so it doesn't look so much like ***. hey, if its good enough for a stock Z32.....anyway thats the state of the project. a few more loose ends to tie up than I'd like to have at this point.

[Redline240]

Why not mount the front turbo underneith and the rear one on top...that way you miss the distributor and the steering shaft...just a thought...

Redline

[spitz7985]

you could do a MAF hackhave two filters, two MAFs, only one of them hooked up (or just an equal size piping) and run 540cc (270x2) injectors (not sure if they make those, you could also run dual 270cc injectors in each runner)

[andrave]

I'm using a JWT ecu though, I called them today and talked about it... going to stick with a single Z32 mafs, just not sure if I'm going to be blowing or sucking through it.lolas for the turbos: I hadn't thought of that, thought I've seen that type of manifold before. I guess for looks that would be pretty ugly. That would also put the second turbo right on top of the plastic master cylinder. It would also make designing a downpipe even harder. I'm pretty sure I can clear the steering shaft, but if I'm going to do it with a stock set of GTR turbo elbows then I need the elbows before I can weld up the manifold so I get the positioning right.