Mini supercharger on 1zz

[Carolyn]

Thank you.  We have the same MAF, so that should be good.

[Carolyn]

Jon came by today and we double checked everything.  The ignition wires in the harness were labelled by 'channel' rather than cylinder.  I had connected them  incorrectly so the firing order was off.  That is corrected and all looks good.

We fired her up (just on the standard ecu) and she's doing more than 10lbs boost.  Time for a bigger pulley.  David will be pleased.

Sounds sweet at idle and revs nicely.

It's so bloody cold in the workshop right now, so it's now on hold until it warms up out there.

Looks like a workable set-up is now in sight.

[Essex2Visuvesi]

Sorry, Homer deserved extra sparkles for all your hard work  s:D s:D

[jonbill]

And the only thing to add is that it makes a proper supercharger sound...

[jvanzyl]

Brilliant! So now it's off to a tuner or are you going to do it on the road?

[Carolyn]

Get the boost level right and use a mate's dyno.

[Essex2Visuvesi]

From what I have read 9PSI is the absolute maximum for reliability with stock internals so I am looking for 6.5-7 on my build.
Im going to go for a electronic boost controller so I can have wastegated Boost of 4 PSI and up to 7 for "hooligan mode"

[Carolyn]

Yes I'm looking for an absolute max 8 psi.

As I'm looking to not have to rev her hard, that should give me the mid-range power I'm looking for.

I can see the attraction of a boost controller...

[lamcote]

What size pulley are you using at the moment?

[Carolyn]

105 mm.  I thought we'd be much less efficient.  Not so.  Get yer calculator out, Patrick.

[lamcote]

That's very impressive. Are you running without an intercooler as that will help efficiency compared to the Mini setup. Presumably you got it to rev up towards the red line to see 10psi, do you have an Air/fuel ratio sensor?

[Carolyn]

No intercooler.  Not quite redline..  Presume nothing - we may even be more efficient than the Mini!!

The original 120 mm??  no other data as yet.

When the emange goes back in, we'll collect some real-time data.  Only standard O2 sensors...

Pulley size first.  Then make the pulley, then worry about the rest.

[Essex2Visuvesi]

Carolyn
I'll send you my Prosport AFR kit if you need one to borrow?
 m http://www.fastwrx.com/products/prospor ... d-kit-52mm m

Just splice 1 o2 sensor to run the 2 normal O2 sensor sockets and then bung the Wideband in the spare hole!

[jonbill]

Carolyn
I'll send you my Prosport AFR kit if you need one to borrow?
 m http://www.fastwrx.com/products/prospor ... d-kit-52mm m

Just splice 1 o2 sensor to run the 2 normal O2 sensor sockets and then bung the Wideband in the spare hole!

Ah thats clever. I read about splicing o2 sensors in another thread but didn't understand what they meant there!

[ChrisGB]

You've run it at full load on the stock ECU?

[Jacobsprky]

well done on all your hard work, hopfully everything goes well for you. keep up the good work!

[Carolyn]

Chris:  No load.  Don't plan to do that with the present boost level.  Don't like the possible consequences.  I'm not planning on putting it under load until the boost is in the < 8lbs range.  David has to make a new pulley to get that.

Gary:  That would be a big help.

Jon:  I was talking ollocks re where the boost line was attached (I was thinking about the vacuum for the BOV, doh!).  The boost line comes off the output of the supercharger.

Patrick (Lamcote): what do you reckon for pulley size?  When we get that right, we'll put the emange in and start tuning.

I'll take a pic of the map that's in the emanage for others to peruse.  The timing map looks pretty conservative to me....

[ChrisGB]

Ah ok. If throttle is after blower, you won't know how much boost is actually being presented to the engine until it comes under load and the engine is breathing.

[Carolyn]

Ah, I was wondering about that.  What would you expect to see under no load?  higher or lower?  It was showing 8lbs  and then spiking up.

[Essex2Visuvesi]

Chris:  No load.  Don't plan to do that with the present boost level.  Don't like the possible consequences.  I'm not planning on putting it under load until the boost is in the < 8lbs range.  David has to make a new pulley to get that.

Gary:  That would be a big help.

Jon:  I was talking ollocks re where the boost line was attached (I was thinking about the vacuum for the BOV, doh!).  The boost line comes off the output of the supercharger.

Patrick (Lamcote): what do you reckon for pulley size?  When we get that right, we'll put the emange in and start tuning.

I'll take a pic of the map that's in the emanage for others to peruse.  The timing map looks pretty conservative to me....

PM me your address (pruned my inbox the other day and must have deleted it) and I'll wack it in the post

[ChrisGB]

If the blower is pressurising the inlet tract up to the throttle plate, the air is not going anywhere, so you will see a lot of boost. Ideally, you want to measure boost after the throttle plate, this will tell you how much the engine is seeing. I'm assuming that you are measuring boost before throttle, given the level being produced without the throttle being open?

[Carolyn]

That's the level with the throttle open.  Engine not under load but revving.  It has BOV with recirc.

[Carolyn]

Thinking about it....  The gauge showed 8lbs as the revs picked up then spiked as it stopped accelerating the engine.  It was not wide open, so the spike would be seeing the back pressure from the throttle plate.
I'll drop her onto the floor and slip the clutch in high gear and see what we get.

[Carolyn]

Going to re-plumb the boost line to other side of throttle.

so which wideband sensor?  Bosch is the one that keeps popping up.  Five wire - they all seem to be that.  I'll need input on wiring it in.

[Essex2Visuvesi]

The Wideband sensor in the kit I'm sending is a Bosch one
Part number D 258 017 025