just saw this, i was on GTRCanada.com and i linked off there site and saw that… thats nuts!
I can’t tell, are these sequential turbos or does each turbo get two cylinders?
If they ran off 2 cylinder each that would be brutal lag for sure i mean look at the size of those. Twin turbo sr’s just dont make sense, its a 2 litre motor, having each cylinder displace .5 litres would lag like crazy. Full boost would peak at like 5500 rpm, haha. They probably have nitrous oxide to get things going a lot faster, and decrease the lag.
Clean install, engine looks great, totally useless!
Some people just have to much money on there hands. It is very nice though.
Easy 8)
Oh yeah? You’ve driven it? I mean you must have driven it to judge it like that…
2 turbos, 2 cylinders per turbo…
Depending on how much exhaust it pushes will be the deciding factor on how effective it is…
For all you know those might be GT2515s in which case those turbos would spin fine…
It’s been done, and it’s worked fine…
Don’t judge it until you’ve driven it…
I’ve seens some photos in a magazine of an SR20 running twin td05 18Gs. It looked pretty wild and turned in some decent times at the strip to boot.
Drag racing is pretty much the only place you could use a setup like that.
if you can somehow see closer up of the passenger fender towards teh back of the fender it says the exact trim of the HKS GT turbos
Oh yeah? You’ve driven it? I mean you must have driven it to judge it like that…
2 turbos, 2 cylinders per turbo…
Depending on how much exhaust it pushes will be the deciding factor on how effective it is…
For all you know those might be GT2515s in which case those turbos would spin fine…
It’s been done, and it’s worked fine…
Don’t judge it until you’ve driven it…[/quote]
Don’t start again man!
dnash summed it well with regards to that car. No twin set up can match a well tunned single set up for lag. I’ve seen numbers put down on twin vs singles and read ton’s of articles. Plus it’s my opinion and Im intitled to it. Thats all Im saying.
Is it nice, yes! Does it look good, yes! Does it run nice, Im sure! Is it just a show car, or at most, a drag car, yes! So for all intensive purposes, it’s useless otherwise. That’s why you don’t see more of them. Either in drag or drift. This was done to show it can be done, and done nicely, nothing more.
So lets just leave it at that.
Have a good one.
Easy 8)
Oh yeah? You’ve driven it? I mean you must have driven it to judge it like that…
2 turbos, 2 cylinders per turbo…
Depending on how much exhaust it pushes will be the deciding factor on how effective it is…
For all you know those might be GT2515s in which case those turbos would spin fine…
It’s been done, and it’s worked fine…
Don’t judge it until you’ve driven it…[/quote]
Don’t start again man!
dnash summed it well with regards to that car. No twin set up can match a well tunned single set up for lag. I’ve seen numbers put down on twin vs singles and read ton’s of articles. Plus it’s my opinion and Im intitled to it. Thats all Im saying.
Is it nice, yes! Does it look good, yes! Does it run nice, Im sure! Is it just a show car, or at most, a drag car, yes! So for all intensive purposes, it’s useless otherwise. That’s why you don’t see more of them. Either in drag or drift. This was done to show it can be done, and done nicely, nothing more.
So lets just leave it at that.
Have a good one.
Easy 8)[/quote]
Obviously you haven’t read enough…
No twin set up can match a well tunned single set up for lag.
You are wrong… When it come to the proportionality, 1 big turbo feeding off 4 cylinders, or 2 little turbos feeding off 2 cylinders, it comes down to flow calculations to match the turbos together…
A twin setup is ideal in a ton of situations especially V setups, high horsepower setups, and scroll setups…
You need to spend less time arguing things you know nothing about, and badmouthing someones work because you heard some mythical watered down theory about lag and twins on a 4 cylinder…
lol all this arugment i just posted it cause it looks crazy!
So if I know nothing, then neither do any of the other people who have stated the same things I have be it in magazines or tunners. That’s basicly what your saying.
Yes it comes down to flow numbers, a/r, trim and a few other things. Neither of which we know. What I do know I’ve read. Even an article with a Tri-Turbo mkIV, the owner said it was useless but he did it anyway. Talk to anyone who tunes on a dyno and see what they have to say.
We all know turbo’s have lag and increases with adding a second despite each running off of only 2 cylinders. Put this set up on bigger motor, RB25/26/30 or a 2JZ, and dam! Im pretty sure it’ll make a great drag car but that’s it! This car was built though for show.
You need to spend less time coming off like you know everything and people know nothing. I did’nt bad mouth the guy’s set up. I just stated what I thought. Why can’t you leave it alone. State your thoughts or opinion and leave it at that.
So Im leaving this alone and so should you. We’ll think what what each of us wants and go on. This is’nt worth it.
Here’s your thread back Aaron. Sorry :lol:
Easy 8)
Because every opinion that you have comes out as “The Truth” or the “Only answer” to this question…
You can’t say anything about a car in the definitive manner you normally do, without driving it, dynoing, or building first… I don’t give a shit how many magazines you read, or how many forums you’ve read…
They dont apply to this situation, there are too many variables…
We all know turbo’s have lag and increases with adding a second despite each running off of only 2 cylinders. Put this set up on bigger motor, RB25/26/30 or a 2JZ, and dam! Im pretty sure it’ll make a great drag car but that’s it! This car was built though for show.
It’s this garbage that sets me off… There are a multitude of TT Skylines running in GT or World Class racing and eating the competition, what is this garbage about drag cars? Why is this about lag? Talk to Adam H, he ran a big turbo, fat A/R and you know what he said? You don’t even notice the lag because you’re always in the high RPMs, so big turbos, laggy turbos, have a place in any racing.
The funny thing about lag is that with newer technology it’s more and more becoming less of an issue, turbos spool quicker now, setups produce more gasses down low to spin the turbine, technology is working to eliminate lag. Even in a high revving naturally aspirated Honda, the car seems to lack power until about 3k rpm, then it gets into the powerband and kicks you in the ass…
The turbo is no different, except you can control the spool through gain levels and A/R choices and the turbo you choose overall…
Find a compressor map on a GT2515, and I’ll show you exactly what I mean…
^^^ = Pro!
While I don’t think a decent TT setup would hurt performance compared to a single set up, I am still going to back Bruce up a bit and say it is effectively a useless mod. The performance numbers from the TT set up can most likely be matched with a clean single setup using quality off the shelf parts. Unless the vehicle in question is a show car or a shop car, where money is no object, it’s a little silly to do.
lol nah go ahead be my guest… listening to you two you learn somthing new everyday
I’m willing to agree that many twin set ups can be matched through a single turbo tuned correctly. Likewise, a well tuned TT mod can be ass effective as a single turbo setup.
It’s a two way street, not a one way. Nothing says a you can’t run 2 matched turbos on a 4 banger anymore then you can run 4 matched turbos on a 6 cylinder…
Not that I’m an expert on the field by any means, but sequential twin turbos are better than a single turbo imo, because they have more boost and less lag at the same time. I realize most of these comments didn’t relate to a sequential setup, but why is it being disregarded? It’s a great setup.
I always thought in most TT cases people would run a Large turbo as the main and the secoundary would be smaller so they get less lag? or is that just some bullshit i thought of?
The 2JZ uses a sequential setup… and its a good setup, its a setup used to reduce lag without sacrificing top end…
i think lag is overrated …though i would opt for a larger single turbo than twins unless i had a V engine
my very large .84ar turbine is laggy if i was on the street…however once the car is running and you are actually on the gas (aka racing the car) lag is almost a non issue since the turbo is almost spooled all the time…in fact when its not its just blowing off excess boost until you hit the throttle again…
i love the new much larger turbine…it makes the car way easier to drive …and way less twitchy…plus it comes on really strong top end…and you get the benifir of being able to run a large compressor that is very efficient…which is key versus smaller heat blender turbos…here is a pic of the difference between the .63ar and the .84ar…and the .63ar is not a small turbine either…vs your t2 series which are even smaller 
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