A serious dual charged / twin charge setup idea

Yeah yeah, I know, it's a generally a very "noob" idea for guys that doen't really know what they're doing. However I can't stop wondering about this setup. supercharger for the low-rpm and turbo for the higher rpms.

I realize that turbos are overall better for performance, but those large cfm turbos take a while to spool up. and a d15 (what I would be doing this on) isn't exactly a high displacing motor to begin with.

Why would I want to do this? Well because, I think it would be fun. This isn't one of those silly "I wanna be the fastest" ideas, this is all about having fun with some R&D and good results. Large turbo would be awesome, but on a small engine such as a d15b, it would be hard to get that thing to spool up, meaning lots of turbo lag. On the track that wouldn't be such a big deal, however in traffic this would suck. Now I'm no forced induction professional, I usually concentrate on the transmissions. However It seems like it would have a recursive effect. Engine is at idle, take off from a normal stop (no launching) and at WOT the supercharger
would be at fullboost by 1200-1500rpm. This would help generate more exhaust to begin "spooling" that larger turbo up so that it would generate even more exhaust. More exhaust bringing the turbo all the way to wastegate pressure.

I have read a few other threads but it was just some kid being stupid with FMU hacks and what not, But I am seriously debating this in my mind. 6psi on a supercharger and 7 psi on a wastegate would have to be a total of 13psi. Makes sense to me (correct me if I am wrong) In the other thread a few people said that they'd cancel each other out. This doesn't make sense because the blow off valve only is opened when the throttle body is closed. And it's not like boost from the supercharger is going to "leak out"

In all seriousness, would this work? We all know of that Lancia delta rally car in gt4 that is twincharged that is fast as ***** (***** being the epitome of fast) but seriously, has this be SUCESSFULLY done on a honda?

 

oh come on now

 

https://honda-tech.com/zerothread?id=1293497
It's a cool idea, but the right sized turbo on a D15 is just so much cheaper so for me a twincharged setup would be hard to justify unless I had a lot of money to blow on my honda.

 

I was going to post that thread too. PM that guy Rmc daniels or whatever. He's very knowledgeable and helped me out in the past.

 

it can work well as rcmcdaniels has proven but i just dont think it would be worth it for a low power setup...I think it would shine in a very large turbo setup where lag would be near impractical and the supercharger would make up for the lost ground and help spool . also it is very impractical cost wise.

 

understandable. I'm just thinking of something like 350whp without having to have huge turbo lag. I know clemsonhatch has done it. But I don't know **** about his setup

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">understandable. I'm just thinking of something like 350whp without having to have huge turbo lag. I know clemsonhatch has done it. But I don't know **** about his setup</TD></TR></TABLE>

Clensonhatch has my old setup. We put it on his race car a while ago. It worked well until his motor ate a rod bearing. We should have it back together again soon. It really does work well for autocross and daily driving.

 

interesting. Something about the carolinas I guess

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">understandable. I'm just thinking of something like 350whp without having to have huge turbo lag. I know clemsonhatch has done it. But I don't know **** about his setup</TD></TR></TABLE>

GT28RS or GT2871R

With my GT28R its a chore to not go into boost. It can make 300-320whp on b18c1.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sp00led &raquo;</TD></TR><TR><TD CLASS="quote">

GT28RS or GT2871R

With my GT28R its a chore to not go into boost. It can make 300-320whp on b18c1.</TD></TR></TABLE>

Night and day difference if you track your car for auto-x or road course. I used to have a 380 WHP GT28RS B16 setup and the boost hits so hard that it's tough to control when accelerating out of a turn.