Superchargers??? What do you know??

SuBaRiNo · Post by **SuBaRiNo** » Mon Oct 08, 2007 8:18 pm

As some of you know i was the lucky buyer of Brumberty's old Super charger (sc-14) that will be mounted to my EJ22 in the hatch.

Just wanted to see what some people know about super chargers.... i have read a lot lately but not found a lot specifically for this engine.

Main debates seam to be with things like weather an Intercooler is worth while... and if yes then what type. Also should a run a BOV... some say yes... some say no.

Other things regard it is will it run with the factory ECU... will i need to upgrade injectors etc etc... i think everyone gets the general stuff im talking about.

Is there any other problems i should expect... any info is welcome.

Dave

subarursliberty · Post by **subarursliberty** » Mon Oct 08, 2007 9:12 pm

I was just reading an article on autospeed. Was a good read about how to mount it and plumb it etc. Its a 4 part series.

Matatak · Post by **Matatak** » Mon Oct 08, 2007 9:40 pm

subarursliberty wrote:I was just reading an article on autospeed. Was a good read about how to mount it and plumb it etc. Its a 4 part series.

(pssst wheres tha link)

SuBaRiNo · Post by **SuBaRiNo** » Mon Oct 08, 2007 9:52 pm

Yeah link please... i assume its on a web site.

Dave

SuBaRiNo · Post by **SuBaRiNo** » Mon Oct 08, 2007 10:07 pm

http://www.autospeed.com/cms/A_2147/article.html

i think thats it

Dave

90brumby · Post by **90brumby** » Mon Oct 08, 2007 11:39 pm

i would say it will run on factory ECU (a guy at wrk is doin it to his VN )

i would run a intercooler nothin flash just somethin i dont c how a BOV is neccary tho

YouTube · Post by **El_Freddo** » Tue Oct 09, 2007 11:47 am

90brumby wrote:i would run a intercooler nothin flash just somethin i dont c how a BOV is neccary tho

I was in the same frame of mind about the BOV, but after thinking about it, if you back off the throttle at say 3000rpm, the supercharger will still be boosting on the down revs as it follows the engine speed. Okay if you still have the throttle partially open i guess, but if not, where would the boost pressure go?

Probabily not a high necessity, but good to have anyway.

Thats my GUESStamation...

Bennie

Xtreme_RX · Post by **Xtreme_RX** » Tue Oct 09, 2007 2:11 pm

My Mums factory supercharged REX (Fiori) runs a BOV it is a plum back style. It does have a top mount IC fitted but it is part of the intake rail/plenum chamber...

BrennyV · Post by **BrennyV** » Tue Oct 09, 2007 4:15 pm

so the factory ej22 ecu wont be botherd with the + presh on the manifold then?

Cam · Post by **Cam** » Tue Oct 09, 2007 5:59 pm

Capa used to make a kit using a eaton m62 and a custom intake manifold where the blower was mounted between the manifold and motor, running @ 6psi it was enough to make the old rs turbo pretty much be shamed by the ej22. The kits cost like 4.5k and prob weren't worth it but from an article i read on it my understanding is that they were using the factory computer injectors etc as the rising rate regulator stopped it leaning out. Also used some kind of wastegate or bov not too sure, I'll try find the article, was in an old hot4's... reckoned it made the motor feel like a 4ltr.

BRUMBERTY · Post by **BRUMBERTY** » Tue Oct 09, 2007 7:10 pm

'[4MUFF wrote:]so the factory ej22 ecu wont be botherd with the + presh on the manifold then?

Not from what I have heard..the ECU via the O2 sensor should adjust the mixture appropriately.

The injectors have heaps of cc's left too, 6 psi is not out of the realm for the standard gear.

Reddevil on the NASOIC boards put 12psi through a plain jane 22 for 8 months, being nasty to it as well.

Intercool it, run a bypass system which is actuated by the tps.
I would put a blow off set high in there too for safety's sake.

The clutch can be set to disengage with a pressure spike (closed throttle body or backfire) a hobbes switch and relay will do the job.

Call if you need.

Matt

SuBaRiNo · Post by **SuBaRiNo** » Tue Oct 09, 2007 8:16 pm

BRUMBERTY wrote: Intercool it, run a bypass system which is actuated by the tps.

Got any more info on this?

BRUMBERTY wrote: The clutch can be set to disengage with a pressure spike (closed throttle body or backfire) a hobbes switch and relay will do the job.

And this??

Dave

SuBaRiNo · Post by **SuBaRiNo** » Sat Oct 13, 2007 8:34 pm

Ok i have done some more research so here is a brain buster for you guys... \

The motor without the super charger uses vacume to actuate a few things in the car... eg: dash vents and brake booster... these will have to be re-routed to the air intake BEFORE the Super charger where there is still vacume right?? Otherwise when i put the super charger in there will be pressure in the manifold making things not work.

Most impostantly is the fuel pressure regulator... this is also done off the manifold vacume right? Will this need to be also re-routed before the super charger... and if so will this efffect the way the fuel pressure regulator operates?

How does the fuel pressure regulator work on an EJ20T? does it work the same as an ej22 one and infact still work when under boost?

Any help or rational, on topic, comments would be great.

Dave

PeeJay · Post by **PeeJay** » Sat Oct 13, 2007 8:52 pm

Not sure about the fuel pressure regulator, but on my EJ20T I have a one-way valve on the brake booster and on the vacuum lines, this stops them being pressurised. With a supercharger, is there ever vacuum in the manifold?

Point · Post by **Point** » Sat Oct 13, 2007 10:42 pm

nope. will work just fine...like a turbo motor. Every time you back off the throttle there's vacuum in the manifold.

the fpr uses manifold pressure (vacuum/boost) as a reference so it can maintain a constant fuel pressure above manifold pressure. ie you will have (for example) 35psi across the injector at all times, whether there is vacuum or boost pressure in the manifold

i'm unsure if the std ej22 fpr would be designed to work with positive manifold pressure, but you could compare it to an ej20t one or just swap it for one.

hth

SuBaRiNo · Post by **SuBaRiNo** » Sun Oct 14, 2007 12:30 am

Point wrote:nope. will work just fine...like a turbo motor. Every time you back off the throttle there's vacuum in the manifold.

That is the case with a Turbo motor... but with a Supercharger the motor is always on boost isn't it... maintaining boost pressure even at idle... which would make the manifold never at vacume.... even a one way valve shouldn't help since at some point there has to be vacume.

Only place there is vacume is before the Supercharger.

Dave

90brumby · Post by **90brumby** » Sun Oct 14, 2007 1:47 am

i havent heard of this vacume problem i no a m8 of mines vy super charged created vacume still ill have a work with the old man 4 ya hes done heaps of wrk with that kinda stuff

Point · Post by **Point** » Sun Oct 14, 2007 9:29 am

toyota supercharger yes? If so it has a clutch like an aircon compressor on the front. Switch it off throttle position so when you need boost you've got it, but when you don't need it, it's off. Would get much better economy. I can't imagine there'd be any boost at idle anyway. How did Brumberty have all of this set up before?

PeeJay · Post by **PeeJay** » Sun Oct 14, 2007 11:17 am

You could also get a vacuum pump of an EJ cruise control unit.

D3V1L · Post by **D3V1L** » Sun Oct 14, 2007 11:22 am

there is vacume in the manifold after the butterfly..on turbo cars and supercharged cars.butterfly closes causes vacume in the manifold ie: when at idle.