Mini supercharger on 1zz

jvanzyl · October 7, 2017, 09:54

All the cool houses have exhaust manifolds in the lounge and fire extinguishers in the background!

Sent from my Moto G (5) using Tapatalk

shnazzle · October 7, 2017, 10:00

What was the verdict on the manifold in the end?
Is it fine the way it is or is it still a stopgap solution? Not that I can see any other way for it to go other than to split off to the left and right around the sc hehe. Would look cool. A v-block-like arrangement.

Carolyn · October 7, 2017, 10:12

It seems to wokk fine. Although, without anything to compare it to (in this application), who knows?

Carolyn · October 7, 2017, 10:18

Top views. That's yer lot!!

MrT · October 7, 2017, 10:19

Thanks Carolynne. I remember now. The lengths will be off but the SC will correct for that. The engine may run a bit rough and lumpy at very low rpm though. I suspect your stock airbox will help smooth the running but it will be a bit lack luster below 2k.

No criticism from me just thinking aloud. A bespoke manifold will make a big difference to the power band and delivery. And especially combat flat spots in the power delivery.

I look forward to the first test run.

Good luck.

cheers

Tyler

MrT · October 7, 2017, 10:22

Oh, you posted those while I was planning my essay! Thanks again Carolynne.

cheers

Tyler

Carolyn · October 7, 2017, 10:23

It has always idled fine. And pulled well. It's just that the engine was bad.

MrT · October 7, 2017, 10:45

Oh no criticism intended, just thinking aloud. Looking forward to the first run.

cheers

Tyler

Carolyn · October 7, 2017, 10:56

Non taken, Tyler. I am a big believer in 'doing the experiment'. There will be tons of room for improvement, I'm sure, but this also had to be kept within a reasonable budget, while the concept is worked out. So far, it has surprised me how well it runs.

shnazzle · October 7, 2017, 11:01

I wish I had the skills, knowledge, time, space, funds to have done this.
Well impressed and I'd love a run out when it's "done" s:)

s:)

jvanzyl · October 7, 2017, 11:31

What's the current list of things to be done?

Sent from my Moto G (5) using Tapatalk

Carolyn · October 7, 2017, 11:56

Longer than my bloody arm.... 'Done' is a very moveable feast.

Essex2Visuvesi · October 7, 2017, 12:08

Quote from: "Carolyn"Longer than my bloody arm.... 'Done' is a very moveable feast.

Maybe this will help?

jonbill · October 7, 2017, 12:25

I like that. Might put it on the wall at work [emoji106]

Essex2Visuvesi · October 7, 2017, 13:14

My favourite is point 11

Carolyn · October 7, 2017, 13:31

This would, therefore, be a #11:

jonbill · October 7, 2017, 22:18

It certainly looks done

Carolyn · October 9, 2017, 13:57

Primed the engine and fired it up. No black smoke. Chain tensioner useless... Wondered why I'd left it out when I rebuilt it.... that would have been to remind me to get a new one!!

BahnStormer · November 7, 2017, 08:23

I was thinking about getting a s'charger on my 1zz... really keen to see how this pans out, both in terms of lessons learned and to see how the drivability has changed - same thinking as you - I'd like a little more instant low- and mid-end torque, but I'm not interested in revving the nuts off it to get the extra power and I want instant throttle response - the idea of a turbo spooling and boost coming in at 3000-4000 rpm mid corner does not appeal!

TBH slightly scared at how long it has taken. Would be interesting to see what you think the end to end time SHOULD be with a full time mechanic on it: I don't have a workshop or even a garage any more, so this needs to be done professionally as I don't think I know anybody with a workshop that can handle a MR2 sitting in the corner for months on end! (please let me know if there's anybody offering to do these types of conversions)...

shnazzle · November 7, 2017, 08:56

m http://www.se7enmotorsports.co.uk/super ... -kits.html m

1979scotte · November 7, 2017, 17:50

I don't want to thread hijack but the 7 Motorsports kit is rotrex based which won't really offer much low down and compared to a turbo offers little torque.
It will however make plenty of power and be much easier on engine and gearbox than a turbo or an Eaton blower.
Extremely predictable linear power delivery.

BahnStormer · November 8, 2017, 22:08

Quote from: "shnazzle"http://www.se7enmotorsports.co.uk/supercharger-kits.html

Thanks - pricey, but VERY nice!!

Quote from: "1979scotte"Extremely predictable linear power delivery.

.... is what I'm after. Low end torque is nice, but I'd gladly trade some of that earlier turbo boost for instant throttle response and predictability...

I'm guessing that se7en's claims for a 1zz are a little OTT (although they do say you'll also need a new exhaust)....

QuoteThis will give you 200-215BHP* @ 8 Psi of Boost

Anything close to 200bhp would be plenty!

1979scotte · November 8, 2017, 22:37

Quote from: "BahnStormer"
Quote from: "shnazzle"http://www.se7enmotorsports.co.uk/supercharger-kits.html

Thanks - pricey, but VERY nice!!

Quote from: "1979scotte"Extremely predictable linear power delivery.
.... is what I'm after. Low end torque is nice, but I'd gladly trade some of that earlier turbo boost for instant throttle response and predictability...

I'm guessing that se7en's claims for a 1zz are a little OTT (although they do say you'll also need a new exhaust)....
QuoteThis will give you 200-215BHP* @ 8 Psi of Boost

Anything close to 200bhp would be plenty!

If any thing I think 7 are being conservative.
No reason to limit the blower to 8psi.
10 psi on a tb2559 turbo is reliable should be more so on a rotrex.
Very little parasitic loss good efficiency low charge temperature and no torque spike is all good.

MrT · November 8, 2017, 22:41

BahnStormer
Those claims are reasonable with a good exhaust and tuning with a piggyback/stand alone ecu. And it'll make very good torque, just smoothly and linearly, not all low down and meaty like the Eaton.

The se7en Motorsports kit uses the bigger 30-94 charger which is good for lots of top end power on the 2zz or a fully built 1zz but more importantly, with the appropriate restrictor on the inlet and smaller pulley size it will make great boost at low rpm and be restricted from boosting high into the revs thus limiting maximum power but having loads of low down torque, similar to an Eaton but in a smoother delivery from about 2-2.5k rpm.

Some very interesting reading on this on the Spyderchat forum, an some neat installations there also. I agree the price is high though, and would want to get the bones of the kit and do a build myself. Ideally I would locate the charger in place of the AC Pump, which most guys have done in the Spyderchat threads.

Scotte
The Rotrex will make as much torque low down as an Eaton if you want to build it that way, depends on what you want.

Carollynne
Any updates for us?

1979scotte · November 8, 2017, 23:15

Quote from: "MrT"Scotte
The Rotrex will make as much torque low down as an Eaton if you want to build it that way, depends on what you want.

Carollynne

Hi Tyler
I am using a BOV to limit the boost on my rotrex c30-94 so as to reach maximum boost in the midrange rather than peak revs.
She won't make the same torque as an Eaton at low revs at least I don't think so.
Roots type blowers are positive displacement make consistent boost through the rev range.
As in you get 5 psi at idle and 5psi at max RPM and 5psi everywhere in between.
They just produce massive heat at higher revs which effects efficiency.
A Rotrex is centrifugal type more revs = more boost and although I won't know it for a fact until I actually fit it I don't think it will be making any boost at 900 rpm.
This is probably over simplified but it's how I understand it.
Have a good book about superchargers lying about somewhere need to re read it.
How is your project coming along?