RB20E Supercharger Discussions.

[Trini.Madman]

Car is an A31 Cefiro

Engine is RB20E - Automatic Transmission - Non-LSD

I have in my posession an Eaton M45 Supercharger

With a 2-1 Pulley ratio from the crank Calculators say id get a 6-7lbs of boost at about 1500rpm.

Any ideas? suggestions? Comments? Help?

Im not going turbo, so please dont tell me anything about a turbo

[Trini.Madman]

Ok so I was having a serious miss problem. Turned out to be #4 Injector Plug was slack and eventually disconnected completely.

With that problem solved, I (out of the blue) decided to try and 1 spot the car, and to my surprise, THE DAM CAR ONE SPOTTED AT 3000RPM with the transmission! I am amazed, idk if anyone else would be amazed at that.

Anyway, im saving up to do an upgrade on my ignition system. Want to put in a coil upgrade, probably a MSD 2wire coil and some MSD 8.5mm Wires. I'll update when that eventually does happen.

As I said before, I have the supercharger in my possession and its a patience game before I get it installed, but i'll obviously need an AEM F/IC and a Wideband before.

Also working on a design of an extractor manifold, anyone with ideas?
Should I do a 6-1 or a 6-2-1?
What piping sizes should I be using.
That kinda stuff if anyone has anything to offer on the topic... Also interested in modifying my intake? Anyone have any suggestions there too?

[240z4u]

You're going to be making your own path with this. It's been mentioned before but nobody ever does it. I hope you do, I'd like to see how it works out for you.

[DA 240]

The easiest approach to supercharging would be to use a Vortech supercharger, but I've seen people make (or buy) adapter plates for the M45 and use it like a Vortech SC. With this approach you could use you're existing manifold without making a custom one.

Take a look at the top pic:
http://www.miataturbo.net/miata-parts-s ... ics-47337/

[Trini.Madman]

I'm hoping to build the adapter plate for the SC over the PowerSteering Pump and the distributor. Removing the OEM intake ofcourse. I'd also need to get a Piggy back ECU. Any suggestions there? I was thinking AEM F/IC with a wideband?

[Carl H]

fyi that head is miserable...i'd do this on a dohc rb20 if anything.
why not retune the stock ecu? investment cost is about the same as a FIC with more adjustability.

[Trini.Madman]

Retune the stock ECU . This is the advise I need. How is that going to be possible?! Do explain some more. I have no idea what you mean ...

[Trini.Madman]

What's miserable about the head? Im looking all over for information but people cant help me cause no one really has done this before. So what Im gona ask is easier questions.

1/ What is ment when they say the Head cant "flow" as much air. Will be really nice If someone and break that down for me Thanks

[JTR32gtst]

RB20 heads are designed for a tiny 2.0L motor. The intake ports are small, the valves are small. I have heard port and polishing and over sized valves help wake it up, but the DOHC head is better. I have an RB20DET that I am stroking to a 2.4L. I am also building the head. This sounds cool, good luck!

[Trini.Madman]

Ok so Lets say I do some head work on the Single Cam's Head. Im not messing with the Cam, If I get Bigger valves, lets say from a RB25det Head. So i'll use one of the valves from that head per cylinder. And I put it into the Single Cam head. What are the odds of it Hitting the Piston when the valve opens?

Considering I do this to the Intake and Exhaust of the Single Cam Head, And considering I put 6-10lbs of boost on the engine... Will the head now "Flow enough air" to create some power?!

[JTR32gtst]

Why would you waste your time supercharging it, yet skimp on the head?

These are interference motors if I am sure, so if you put a bigger valve in it without accomodating the piston, it would hit if I am correct. Plus, Rb25 heads are way different than RB20 heads which are different than RB26 heads.

Sounds like you have a ton of issues to get figured out.

[Trini.Madman]

Hey guys! So the hold back before was my dad. The car is his, because its very expensive for someone under the age of 25 to get insurance in my country. How he has giving me a green light and go ahead with the project!

So RB20E + Eaton M45 Supercharger!

I gave him the incredible task of making the bracket to bolt the unit on the engine. In the mean time, i am working on how to get a pulley system made up to run the supercharger and the other fine details. So any help guys? id most appriciate.

[Trini.Madman]

ok so, got into some hickups, but stuff sorted out.

going to do some straightening out with the powersteering high pressure line, and move the power steering resoviour and make space for the supercharger.

Ive got a question to anyone who has an input,

ive got my aem f/ic 6 and my engine runs N/A with a maximum of 40% duty cycle.

giving that the stock regulator should raise pressure 1psi per psi off boost, anyone got any ideas of what a general base map should be for boosted operations?

Just wondering what duty cycles will be like so i can input the info on the f/ic before i go trying to tune.

like should i add 10% duty per psi? or 5%?

[d1cefnz]

hey how have u got on so far i had throught bout doin a supercharger conversoin on mi old de motor but ive sort of done da same but turbo on an rb20e custom exhuast manifold 4 turbo (toyota 1kz just wot was sitting round @ work at the time ) runnin 9psi boost (can go more if i want bout 14ish max i think wen i free boosted it to see ) de injectors tuned standard ecu but not for injectors

[Trini.Madman]

Hey, im almost ready 2 boost. I needed to do some moving around of the PowerSteering Reservoir which took some patience and doing.

So i cleared up the space for it.

What octane are you using for that 9psi boost?

Im waiting for a guy to build the bracket for me for the supercharger, then its a matter of belt, oil and piping!

When its done i'll do some pics posting and a little writeup on what i went tru to get it done.

[d1cefnz]

95 or 96 octane have used 98 once as theres only once place thats got 98 an race fuel on tap where i live