I have seen a little bit of talk about this. Has anyone done anything with this or is this just online dreaming? I know I was a late model RX& and it got fast so quick it was scary. So I know the concept is sound but would the application work on and H22?

 

single turbo is much more efficient for our motors

 

you should get a turbo on each cylinder

 

Comparing a 13b rotory to a inline 4 h22a, i have seen it all.

 

A sequential turbo setup is great in theory . . . . especially on a VTEC engine where a small quick-responding turbo will run out of steam long before the high redline, and a bigger one will suck under 3,500-4,000 rpms.

But in practice, the cost & complexity greatly outweigh the benefits. I've never seen it done.

 

DRT had a twin turbo civic in the 9's, but I think its retired.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evil Nick M &raquo;</TD></TR><TR><TD CLASS="quote">DRT had a twin turbo civic in the 9's, but I think its retired.</TD></TR></TABLE>
Twin turbo I've seen - although that's completely pointless on an I4.

Never seen an aftermarket sequential setup.

 

with true sequential you can make great power, but you kinda need more displacement i think. just to make it worth the time and effort. and with todays quick spooling turbos its almost a moot point

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crj_lll &raquo;</TD></TR><TR><TD CLASS="quote">I have seen a little bit of talk about this. Has anyone done anything with this or is this just online dreaming? I know I was a late model RX& and it got fast so quick it was scary. So I know the concept is sound but would the application work on and H22?</TD></TR></TABLE>

your not dreaming and ignore all the flamers..

it certianly possible because you can sequentially turbo any motor , its all about turbo sizing. the main problem i see is traction, if you have boost in low rpms then you will have basically no traction.

it certianly is doable , you would have to size the turbos perfectly, but both the rx7 and supras have sequential setups. the idea is to get practically immediatee boost reponse. but like i said before if you have immediate boost response on a fwd car traction is going to be a joke.

it also pisses me other that no one has an open mind and make comments without even knowing what they are talking about. the only reason most people run one single large turbo on hondas is because they are trying to make big numbers.. and honda motors rev out very long and you need a bigger turbo to provide for that airflow need in the top end.

 

okay prelittlelude, you have a supportive statement and i'm not flaming, just curious as to how the "sizing" really works? I wouldn't imagine that the h22 has enough shear exhaust flow to push that kind of setup. Interesting concept.

As far as cost vs. benefit, you probably have c-notes to wipe your *** with if you think its worth the money.

edit:: adding some questions:


Given this image, i would imagine the problems/difficulties would be:
_Manifold/turbo mounting space (or lack thereof)
_Controlling the multitude of valves (piggy back unit for ecu? hondata?)
_Pressure tank (or is that the vacuum control unit that we already have?)





Modified by optikal_blitz at 1:10 PM 5/16/2005

 

i think that one would have to consider their power goals. lets say that you want a 800whp turbo prelude

obviously the size turbo that would make that kind of hp would spool very slowly

the idea would be to use a smaller turbo that is easily spooled hence making low end boost that will intern provide for more exhaust flow to spool the larger turbo.

cetianly space would be a restriction but i think that could be over come with proper manifold design. as far as electronics, i know aem ems have enough user definable inputs and outputs that you could definatly control the setup.

one would have to look more into sequential setups and exactly how they find the correct sizing. im willing to bet there is plenty of documentation on the internet that could help you figure the whole setup out. you would probably want to look into how the factory sequential setups work on the supra and rx-7.

im no expert, im merly expressing the fact that sequential setups due have their place and are worth it, take the example that two major car manufacturers had sequential turbo setups on their high end production performance cars.

 

Well to everyone,

#1, Money is no object if you are patient. This is no longer a daily driver. We all have things we waste money on. Women have teir purses and shoes. I have my car. Women can spend 200 / pair but a tubro set up that cost a few thosand is not reasonable.

#2, Prelitttlelude: Thanks for all your words of wisdom. I have a few more one off ideas for my lude so I am going to look into this and see what I can come up with. I will let you know if I come up with anything. I know there was a twin turbo civic a while back that was siquential. The first was a Super charger for use before the VTEC and then after the VTEC came in, the Turbo kicked in seamlessly. I just remembere this one. Anyone remember it as well?

 

What, no thanks to me for the image?! jp. I've seen some people go the JRSC + Turbo but i think it was a drag only application. Keep up with the research and definitely go for it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prelittlelude &raquo;</TD></TR><TR><TD CLASS="quote">

your not dreaming and ignore all the flamers..
</TD></TR></TABLE>

people on H-T are too quick to flame now days. In every thread you will find a lot of flamers.

if he wants to do this, then let him do it. its not like its your money.

 

i hate lag...even on a t3/t4 setup its to laggy for my liking ..

if i was to turbo a car it probly wouildntbe fwd due to the traction issues ....

when i do get a rwd again i want to do twin smaller turbos and try to acheive instant throttle responce...i knoe a well designed turbo can work well but im not after peak power ...i would love to end up with 350rwhp but have it ready to go at 2000rpm

anything is possible ...

 

i think it can be done and it is very possible. even not just for super high hp numbers but also for the response and reducing lag. in the june issue of sportcompactcar magazine, the editor dave coleman explained some of the concept about the twin charging with a supercharger and a turbo which is very interesting and very possible. the idea is very similar to using 2 turbos. there is also a twin charged mini s in the issue as well. moreover, there is a toyota mr2 that is twin charged from the turbo magazine with good results a while ago.

 

there was also a good article by dave about a self contained twin turbo system...basicly recurculated its self if i rember corectly ..very cool ..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by optikal_blitz &raquo;</TD></TR><TR><TD CLASS="quote">What, no thanks to me for the image?! jp. I've seen some people go the JRSC + Turbo but i think it was a drag only application. Keep up with the research and definitely go for it.</TD></TR></TABLE>

Sorry big guy. THis is for you,

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by optikal_blitz &raquo;</TD></TR><TR><TD CLASS="quote">okay prelittlelude, you have a supportive statement and i'm not flaming, just curious as to how the "sizing" really works? I wouldn't imagine that the h22 has enough shear exhaust flow to push that kind of setup. Interesting concept.

As far as cost vs. benefit, you probably have c-notes to wipe your *** with if you think its worth the money.

edit:: adding some questions:


Given this image, i would imagine the problems/difficulties would be:
_Manifold/turbo mounting space (or lack thereof)
_Controlling the multitude of valves (piggy back unit for ecu? hondata?)
_Pressure tank (or is that the vacuum control unit that we already have?)

Modified by optikal_blitz at 1:10 PM 5/16/2005</TD></TR></TABLE>


Where did you find this pic?

 

Er..forgot to give credit to the site but:

http://www.lextreme.com/sqtt.html

 

How would this work? What if you had a small turbo blow into a larger turbo so the larger turbo could spool quicker? How would that work? I would think the large turbo would spool almost as fast as the smaller turbo then. Let me know what you all think?

 

if you read through the article, there is actually a valve that controls how much the exit gas pushes the larger turbine to spool it. It's RPM dependant so at low revs the valve is closed, thusly not spooling the larger snail.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by optikal_blitz &raquo;</TD></TR><TR><TD CLASS="quote">if you read through the article, there is actually a valve that controls how much the exit gas pushes the larger turbine to spool it. It's RPM dependant so at low revs the valve is closed, thusly not spooling the larger snail.</TD></TR></TABLE>

Yes I read through the artical. That is where I got this idea from. I am not talking about using the snail for any horsepower at all. I am only talking about using the snail to spool up the larger turbo. This way no valve would be needed. Smewhat simpler for us tuners.

 

There is a late model CRX (think you guys call it the Del Sol or somethin) near me that has a twin turbo H22 setup in it... I'm not sure on the particulars of the setup (could probably find out for ya's if you want) but it belongs to a Performance shop. Not even sure if it has even hit the track for that matter- i think it's just their show car.

 

Run some reconaissance on that H22 'Sol, i'd like to see some pics and specs.

I see what you mean about using the small turbine to spool a larger one. It could work.