my twincharged project

[quattro-nick]

After many hours I finally can share my twincharged project with you!
First I made some room in front
then I made 2 supports for the sc and made some adaptions on the crossmember
the sc is a 1420cc roots sc from a toyota previa with clutch
afterwards I adjusted the crankshaft pulley
the multi-v-drive is about 200 mm and comes from a american v8 engine
on the picture you see from right to left,AAN pulley-kv pulley-v8 pulley
I dismantled the compressor and cleaned everything + new oil in the sc
i made a custom boostpipe with w/M injector in place,spray it with black paint and mount it on the sc
time to place the sc on the engine for good
for the bypass valve i choose for an electric throttlebody(70mm) from a vw 2.3 vr5 engine because you can open this on 2 ways,electric and by a cable
made some adaptions on it and mounted on the boostpipe,now it can open electric and with a custom made waste gate valve from a diesel turbo
then i made the second boostpipe
made a total new frontplate on the crossmember
because of the small room now on the left it was Necessary to place a new smaller oil cooler.
time to place the front back together
then it was time to adjust the steering pump
i choose for an electric pump from a opel astra
naturally i designed a custom support again
When it was finished I started to place the W/M injection from AEM
afterwards I finally can go test drive on the road and adjust the mapping along with the W/M injection.
the clutch from the sc is activated between 900-4000 rpm,45%-100% throttlebody
after 4000 rpm the turbo takes over
Today I have been on the dyno with some good and bad results
good:the car pulls very quickly
bad: in some way i've lost some 73hp on the end
in the past i made with turbo 520 hp and 636 nm torque and now twincharged 447 hp and 566 nm torque with the same dyno
I do not know how it happens, all the values are good and I come smoothly on my turbo pressure (2bar)
maybe restriction from the hoses and custom boostpipes?
this I'm going to repair in the future
and now some pictures,enjoy

[quattro-nick]

more pictures

[quattro-nick]

and more.........
dyno day with a movielink
if you see on the dyno sheet,the black lines are the results from turbo and the red one from sc and turbo
you can see very good the difference
also in the movie you can see a working bypass vlave
the last picture is a drawing of the system

link movie

[quattro-nick]

if someone has an idea of my lost horsepower ,let me know

[AndyP]

First of all, great job in getting it up and running

Are you running the supercharger all the time or does it drop out once the turbo is boosting?

[quattro-nick]

thanks
and the answer for your question stands in the first post
sc is activated between 900-4000 rpm and 45%-100% throttlebody

[AndyP]

Sorry, missed that

I was going to say it could be parasitic losses from running the supercharger.

Only other thing I can think of is that this black pipe does not look great for flow, when the turbo is boosting you could be getting air fed back into the SC. I know you're tight for space but I'd try getting them to blend more smoothly rather that a 90° T joint.

[AndyP]

Have you got a photo of the dyno plot shown in the video?

[Thuppu]

Thats a lot of fabricating done there, great job! Was thinking when you will go public with this. How much boost does the SC make? Strange the power drop, are you sure the BOV stays closed on full boost?

[quattro-nick]

that was also my thought so in the future i was planning to build a second valve in the inlet tube from the sc so if the turbo takes over on 4000 rpm with open bypass valve at the top,i gonna close the inlet tube from the sc.than the turbo boost can flow straight in the intake without boost loss downstairs to the sc on the t-split

dyno sheet will follow tomorow

[AndyP]

I thought mine was quite torquey at low revs, I have 275Nm at 2500rpm, you have 375Nm

[quattro-nick]

Thats a lot of fabricating done there, great job! Was thinking when you will go public with this. How much boost does the SC make? Strange the power drop, are you sure the BOV stays closed on full boost?

i think about 1.5 bar boost from sc,it's hard to say because turbo blows into supercharger
so absolute boostpressure is sc+turbo boost
when i take the hose off from the waste gate on throttlebody i can make 3 bar boost without problems ,has this once while mapping

and yes,bov is closed because turbo boost is pressent without problems and i've see it with my own eyes that the bov is closed on the dyno

[quattro-nick]

here you go andy
dyno sheet from today,second picture is from the past with only turbo
black lines are with turbo only and red with sc and turbo(dyno today)
pull in 4 gear

[Thuppu]

How is the IAT? Not bad I guess as you have the WMI..?

[quattro-nick]

there are 3 injectors in the set,300cc-500cc-1000cc
i've taken the 500cc.the little aem ecu is programmed like this:injection start at 8 psi and ends at 30 psi.
why 8 psi? because i have no cooling after sc
on full throttle i have about 20°c intake temp (inside the building from the tuner)
when i was driving to the tuner today i had about 5°c temp intake with w/m and cold weather outside
this W/M from aem is really great stuff
i have also a green led for system control
aem system number is 30-3300

http://www.amazon.com/AEM-30-3300-1-Gallon-Methanol-Injection/dp/B00GSBKNF2