i was planning on dropping a b18c5 into my 95 integra ls
is it possible to use a Vortech supercharger in conjuntion with 7-10 lbs of boost?

 

are you saying you want to put on a turbo and a blower?
that's an *** load of money and it won't work.

 

wtf? im pretty sure thatll rape your wallet with the build up you will need

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITRConversion &raquo;</TD></TR><TR><TD CLASS="quote">i was planning on dropping a b18c5 into my 95 integra ls
is it possible to use a Vortech supercharger in conjuntion with 7-10 lbs of boost?</TD></TR></TABLE>

Please don't, you would be ruining a perfectly good C5

 

Didn't Meguires do a similar setup with their Type R?

 

Meguiar's did, it was a Type-R with a supercharger and turbo combined blowing about 20 psi of boost. It was featured in a Super Street from 01 or 02, I think.

The dyno curve was siiick looking...

 

I remember that, I think the Meguiar's was actually a HKS setup that never really materialized... ???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black-LS &raquo;</TD></TR><TR><TD CLASS="quote">I remember that, I think the Meguiar's was actually a HKS setup that never really materialized... ???</TD></TR></TABLE>

it was actually a prototype kit for the MR2 and they custom fitted it for the R. too much money though to do it.

 

correct is was originally done with an MR2...it would have to be a roots style blower tho, a vortech unit and a turbo wouldnt physically be able to coexist

 

yes a super turbo is tight in theroy, and youll definitly be the only one around with it. but its hugly ineficient. because turbos and sc do the same thing (forced induction) basially one system is going to be better (likly the turbo) and the other will just be slowing it down. it may give you more power, but you might as well save the cash and upgrade to a larger turbo. the way i see it, you should try to be origional, but only to an extent, if no one else is doing it, there is probolly a reason why.

 

well maybe if you had something like a jackson unit which replaces the entire intake manifold and then you had the turbo pulmbed up to feed the blower...but you would need to modify the blower to be able to actually utilize the extra incoming air

 

Please dont do this.

 

Actually one of them wouldn't be really running better than the other. It is a great idea.

All a turbo or supercharger cares about doing is compressing air to a certain ratio.


A supercharger will usually range from 11:10- 5:3 compression ratio as it goes through the RPM range. 11:10's (~1-2psi of boost, ~15-16 absolute psi) at low RPMs and 5:3 (~10psi of boost, ~25 absolute psi) at high RPMs.

Turbos will compress air at a max ratio after it spools up to a certian shaft speed. Say a 2:1 ratio (~15 psi of boost, ~30 absolute psi) at 4000 RPMs and up.

Now, if you have a turbo-super charger set up. Say at 2000 RPMs your Superchager will be compressing at a ratio of maybe about 12:10 and your turbo may not be compressing at all yet. so this will give you a compression ratio of 12:10 (~2-3 psi, ~16 absolute psi).

Now at 4000 RPMs, your turbo is a full boost and is at a raito of 2:1, and your supercharger is at maybe 7:5. So, first is goes through the turbo and is compressed 2:1 (~15 psi of boost, ~30 absolute psi). Now, this compressed air is run throught the super charger and compressed agin at a 7:5 ratio (27 psi of boost, ~42 absolute psi). 27 PSI OF BOOST (remember the compression ratios of the turbo and supercharger are based of absolute psi).

And now... if you are at 8000 RPMs, your turbo is still compressing 2:1, and now your supercharger is up to 5:3. So your ambient air starts out at 15 absolute psi, runs throught the turbo and is comressed 2:1 (~15 psi, 30 absolute psi). And then compressed again through the supercharger at 5:3 (35 psi of boost, 50 absolute psi).

We are boosting up to 35 PSI!! with a turbo that has a max effient boost level of 15 psi!! Imagine the turbo lag that would occur if you uses a turbo that would give you 35 psi alone. Less turbo lag = the low you can start making power.

Also, from using a supercharger, you can even start boostion and making decent power as low as 2000 RPMs (~2 psi).

Now if your boost wants/needs are not that high... say you only want to max out at 25 psi, you could run and even smaller turbo that would spool up even faster, giving you even more low end grunt!!

So, in theory this is and awsome idea. And they have blowoff valves that will alow air to actually be sucked in through them into the intake tube if there is too much of a vaccum. So the thought that at very low RPMs, the turbo lag would cause too much of a vaccum for the supercharger is taken care of.

However, with the engine monitoring and management of this (fuel management) this starts to become a nightmare.

But I would love to see someone work out this idea, because this would yield an AWESOME power band, good low end grunt, and some bad asses top end power.




Modified by PSU-TEG at 9:20 PM 5/4/2003

 

why dont you just buy a type R with the money you will dump into it, and turbo that

 

are you joking?

did you read the post?

Don't get me wrong, Type R's are awesome, and the power you can make with a turbo is great. (not to mention a turbo-super charger system is not even available, so a Turboed R would be a nice way to go.)

But if some develops a turbo-super charger.... show me one Turboed R that will have 2 psi of boost at 2000RPMs, 25 psi by 3000 RPMs, and up to 35 psi at 8000 RPMs. It ain't gonna happen. Sure you can get a turbo up to 25 psi, but it's going to take until 4000 RPMs or so. And at 2000 RPMs, you're engine is still going to be under vaccum instead of boost.

Also, I'm not saying this would be any economical way to go, if the system was developed and for sale, it may cost a small fortune. But you will get the type of performance and power band in the low AND high RPMs, that no turboed or supercharged Type R can achieve.