Mini supercharger on 1zz

jvanzyl · June 22, 2016, 16:13

If you're in need of a project plan I can happily assist! (Kind my job).

Also if you need some 2ZZ injectors to test out I can provide you with mine... (recently refurbed)

love the idea of a MR2ROC supercharger kit!

Carolyn · June 22, 2016, 16:39

That sounds like a good idea. A plan! A team! I've got the workshop, the tools and we can use my ~2 car (in pretty good shape) as the guinea pig. If all goes south - got a spare engine.

Carolyn · June 22, 2016, 17:17

Anybody got a used toyosport manifold, to be used as the basis for the one for this project? I'll but a new one if it's needed. The plan is to cut it near the top flange and extend it outward with straight tubing to go around the supercharger.

The exhaust then goes right through the centre of the new subframe...

Must crack on with the subframe.

shnazzle · June 22, 2016, 20:35

Quote from: "Carolyn"Anybody got a used toyosport manifold, to be used as the basis for the one for this project? I'll but a new one if it's needed. The plan is to cut it near the top flange and extend it outward with straight tubing to go around the supercharger.

The exhaust then goes right through the centre of the new subframe...

Must crack on with the subframe.

Wouldn't an old stock manifold do then if you're cutting near the flange? Must be plenty of those around

Carolyn · June 22, 2016, 20:38

No I need the rest of the toyosport - less bulky

Mark A · June 22, 2016, 20:45

I have a spare Toyosport manifold you can borrow

Carolyn · June 22, 2016, 20:55

Thanks for the offer, Mark, but it's going to get butchered... want to sell it?

Mark A · June 22, 2016, 21:06

Make me an offer, it's not too old happy to picture it first, not going to be used by me now.

Mark A · June 22, 2016, 21:07

Or if the kit comes off might take a discount on one?

Carolyn · June 22, 2016, 21:12

Sent you a PM. The kit coming off is a long shot at this stage....

lamcote · June 26, 2016, 18:14

Does anyone have a view about the most appropriate piggyback ECU for this. Would the Emanage Blue be adequate or would the Ultimate version be essential. Would the answer to this be different according to the boost levels being used?
Also what extra wiring is required to fit these piggybacks? I'm thinking Boomslang but hoping for a cheaper option!
Also, who is deemed to be the best tuner for boosted engines with Emanage units? If we managed to get to the point of tuning the kit in maybe we could all chip in some money to pay for a mapper to set up a standard map which would be available for everyone using the kit.
Any thoughts /advice?
Thanks

jvanzyl · June 26, 2016, 19:14

Would seriously consider chipping in to help with tuning if it helps....

Carolyn · June 26, 2016, 19:32

Patrick (lamcote) visited today, with his lovely family, and we spent a few hours looking at, and discussing, the project. I think we both agree that it does entail fabricating a sub-frame, and that it is not too big a challenge. He's shown real commitment to the project, now we need more on board.
Jvanzyl, please come on board as the project will only get anywhere if the tasks are spread about somewhat. We can do the mounting and fabrication to get the hardware in the car. If you would take charge of the electronic control, that would be a major contribution. Somebody who has done a turbo project would be good to help specify the 'plumbing'.
Those who contribute get to share the results. That seems the way to go.
It really does help to come and have a look at how it all lays out around the engine and in the car.

Anonymous · June 26, 2016, 19:45

Plumbing I assume you mean intake route and cooling?

Keep it as short as possible and to avoid added heat soak and a charge cooler is the most efficient but a small intercooler in front of the gearbox will probably do as it's the m45.

Nostromo · June 26, 2016, 20:00

This thread is 100% relevant to my interests! I don't yet have my MR2 so please excuse my ignorance but is there a reason why the charger couldn't sit on top of the engine then modify the engine cover to suit?

Carolyn · June 26, 2016, 20:11

There is no reason. Except.. ugly and rearward vision. Did consider that.

Don't know why folk are so worried about fabricating sub-frame. It is the most elegant solution and not as hard as it sounds.

Nostromo · June 26, 2016, 20:17

Would it potentially be a much easier mod if you did go that way? Basically (ok, not that basic), I'm going to be turning my MR2 into an RS200 http://mrs200tribute.wix.com/ so will have a big engine cover and plenty of room for a supercharger to fit inside. Personally, I think it'd be pretty cool to look out the back window and see a nice belt driven charger pushing the car along.

lamcote · June 26, 2016, 20:18

Can anyone confirm the diameter of the 1zz crank pulley?
Carolyn, is the supercharger pulley 65.5mm diameter (I believe that is the standard size)?
Thanks

Carolyn · June 26, 2016, 20:22

Quote from: "Nostromo"Would it potentially be a much easier mod if you did go that way? Basically (ok, not that basic), I'm going to be turning my MR2 into an RS200 http://mrs200tribute.wix.com/ so will have a big engine cover and plenty of room for a supercharger to fit inside. Personally, I think it'd be pretty cool to look out the back window and see a nice belt driven charger pushing the car along.

Interestingly my hubby, David was part of the team that bult the first RS200s at TC prtotypes. As for the charger on top - not my taste,

Carolyn · June 26, 2016, 20:23

Quote from: "lamcote"Can anyone confirm the diameter of the 1zz crank pulley?
Carolyn, is the supercharger pulley 65.5mm diameter (I believe that is the standard size)?
Thanks

I'll measure and let you know.

Carolyn · June 26, 2016, 20:31

Quote from: "Carolyn"
Quote from: "lamcote"Can anyone confirm the diameter of the 1zz crank pulley?
Carolyn, is the supercharger pulley 65.5mm diameter (I believe that is the standard size)?
Thanks

I'll measure and let you know.

135 crank. 65 supercharger. You're working out how fast it will spin... should be similar to the mini?

lamcote · June 26, 2016, 20:42

The Mini crank pulley is 138.7mm so the 1zz would produce very slightly less boost than the Mini but you can easily find 15% (and others) smaller pulleys for the supercharger which would push the boost up to more than standard (which seems to be 10-11psi on the 1.6l Mini)

Edit: Compression ratio on the Mini seems to be 8.3:1.!! Maybe stick to the standard pulley..... Both engines redline at 6,800 so that's OK.

Carolyn · June 26, 2016, 20:44

Good info.

lamcote · June 26, 2016, 21:20

OK found some formulae about supercharger size/pulley ratios on the Web. If they are right it appears that there is a pretty much straight line boost variation when you use a supercharger on different sized engines. Can anyone confirm?
If so, that would mean that the standard Mini pulley setup would produce about 8.5psi max boost on the 1zz, taking into account the smaller 1zz crank pulley and the larger 1zz engine capacity. That should be c.45% power increase with a decent intercooler setup. Obviously this is back of envelope stuff.

Carolyn · June 26, 2016, 21:30

That'll do me. So when it would be producing 100 hp, it will be 140. When it would be producing 140 hp, it would be 196, without spinning its head off. Can bring that up if we wish. Personally I'd be happy to start there and see how she drives.