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Location:
Perth WA
Registered:
December 2003
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Fitting SC14 to AW11gze
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Wed, 08 June 2005 07:18
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Well, i dont want to hear anymore whinging about the fitting of an SC14. ive done this myself with limited resources and parts on purpose to prove it can be done for under $500.
website (contains links to larger more detailed images) : http://www.members.westnet.com.au/adsport/sc14fit/
.doc form : http://www.members.westnet.com.au/adsport/sc14fit/ SC14fitting.doc
and just for the forums :
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Fitting an SC14 supercharger to AW11gze
By Adsport
"What is an SC14?"
The SC14 is a rootes based positive displacement device (supercharger) which has an outlet volume of 1420cc per revolution. It is fitted to the 1GGZE found in GZ20 soarers and maybe some others. The SC14 is a big brother of the SC12 unit of the same design found on the 4AGZE powerplant found in AW11 MR2's and Corolla Levin AE92 and AE101. The SC12 outlet displacement is 1200cc.
Now ive heard a lot of scepticism over fitting these units to the 4a base plant. Most of the criticism to the bang for buck comes from people saying that the unit doesn't line up with any of the brackets or existing piping, and cost way too much to setup due to the amount of custom gear required to work it. I have done some research and looked around at many setups and have not seen an SC14 setup that doesn't have a number of custom made piping and the bigport n/a intake.
To fit this unit isn't anything a person who's uncomfortable with tools can do, there is a bit of grinding, cutting and some slight machining to be done. I like to be a bit of a pioneer myself trying new things that other people say can't be done, so ive put my heart set on fitting this thing with minimal fuss, so that many people can follow the same steps and fit it up with ease.
Why it doesn't fit : The SC14 is larger , it is longer and higher than the SC12. It's not THAT much bigger but big enough to make a difference in an area that's already squashed for room. The physical size and position of the lower bracket mount were just simply not made for the 4a motor.
Where it does fit : the SC14 will fit the standard lower bracket without modification, that's all. The position the 4a lower bracket puts the SC14 in is too close to the rear (flywheel end) of the motor and the main pulley does not line up .
Here are some pics of the SC12 and SC14 units side by side :
 
What doesn't fit :
1/ Main pulley : As previously stated, the main pulley doesn't fit if slapped onto the standard bracket without modifications to bring the whole unit forward. Some SC14 units have different pulleys, mine came with one that had a blank section on it which is advantageous to me , but we will talk about that later.
2/ Standard intake. The SC14 unit hits one of the anchor points for the stock suction pipe this is the adaptor pipe that bolts to the intake plenum under the throttle body and feeds the supercharger intake on the standard setup.
3/ Suction pipe : The SC14 fitment is hugely hampered by the terrible casting dags and the bolt hole on the suction pipe.
4/ ABV : Aside from the fact this will vent the boost pressure after 8psi, which makes the whole operation useless, this thing is completely huge and hits the SC14 also.
5/ Lower bracket : The lower mounting points on the SC14 are wider than the SC12.
6/ Upper bracket : The SC14 uses different mounting points on the 1GGZE motor that aren't available on the 4a.
Solutions :
1/ Pulley : my pulley, had a blank section on the end of it , two ribs lined up to my stock belt setup so I just had two more ribs machined into it by and engineer with a lathe. The pulley profile was like |\/\/\/\/``````| and is now like |\/\/\/\/\/\/``| to accommodate the 4 rib belt while lining up to everything else. As you can see it is a minimal increment that it doesn't line up by.
2/ Standard intake : The plenum bolted to the head is nothing fancy , but if you don't want to upgrade it or want to get away with the setup of this cheaply you can still retain it. You can do this by cutting with a grinder (4inch) the lower right hand fixing point for the suction pipe. Make sure you don't cut it too high as you will cut a hole in the plenum. This can be done IN CAR , the plenum does not have to be removed as you can fit a grinder down the back of the motor once the gear is out.
3/ Suction pipe : The casting dags and bolt fixing point where this bolts to the plenum must be fully removed and smoothed off of the pipe, giving you much more room.
4/ ABV : you must remove this and replace with a plate. Aluminium / Steel, doesn't matter just make sure it won't leak pressurised air.
5/ Lower bracket : you must use a washer in the space left over in between the 14 mounting points and the SC12 bracket to the block. If you don't do this the unit may slide over and out of place.
6/ Upper bracket : Make something.
Fitting :
First , the inlet and outlet of the unit are all wrong for your application. You can swap them over , do this by simply slotting the upper holes as the lower ones match.
  
While you have the piping off, you must alter the pipe that will be the intake pipe. You have to cut it off while it is straight like this :
When the piping is on the unit, it will look like this :
The intake pipe will be close to the motor up against the water piping and before the unit goes in you must get some flexible hosing ( a silicone bend of 2.5" internal diameter would work as good) which is 220mm long, and clamp it to the aluminium pipe.
This will then later clamp to the Suction Pipe, joining the two together. It will have an orientation somewhat like this when on the motor
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Location:
Perth WA
Registered:
December 2003
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Re: Fitting SC14 to AW11gze
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Wed, 08 June 2005 07:19
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Now, the "Suction pipe" must be modified or it will foul on the s/c unit making it unable to fit. You will start with a pipe that looks like this :
 
And you have to grind down the casting dags and the lower fixing bolt sleeve so that the pipe is smooth, allowing more room for fitment.
 
Now is a good time to plate the ABV hole .
Next we can get to the intake plenum, remove the lower right hand bolt fixing point, so it looks like this :
The s/c unit must have the charge pipe removed prior to slipping it down behind the motor. Watch out as it gets tight and squeezy but it does fit with a wiggle.
Spacer : this is the aforementioned washer that holds the unit from shifting forward and backwards on the bracket.
Here you can see now how much room ( or how little room ) you have to work with , and how less you would have had!
The suction pipe, the throttle body and intake adaptor can now be fitted, make sure you put a hose clamp on the flexible piping and slip the suction pipe into this. Bolt up the 3 remaining bolts to the plenum and tighten up the hose clamp for the pipe to the s/c inlet.
So now, you will require something to stop the unit moving towards and from the motor. To stop this movement you will need to fabricate a top bracket. I have made one up consisting of flat bar (4mmx20mm) and one nut. Sound too simple? Not really as that's all it needs. 4mm bar is very strong , and with it being straight there is no reason for it to flex out of position. The bar needs to be a complete length of 140mm. the bar bolts to the original SC12 forward mounting point (this will be a stud in the intake plenum , replace it with a bolt if you like as I have) and with the nut at the end welded underneath it , a bolt may be put through the SC14 mounting point at the front, this will secure it very well.
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Location:
Perth WA
Registered:
December 2003
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Re: Fitting SC14 to AW11gze
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Wed, 08 June 2005 07:19
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The outer edge of the support bar to the hole centre of the nut will be a measurement of 130mm. This works for me and it doesn't sit completely against the motor but offset by about 10mm to avoid possible vibration issues.
  
There is 15mm of clearance to the boot wall, with the altered exit pipe pointing directly up. I would expect if you would be able to get an original exit pipe on there , with it having the curve cut off as we did for the other side it would point in the same direction as the standard SC12 adaptor pipe and the original intercooler could even be retained by using a short piece of "hard pipe" or a long section of silicone hose .Why you would want to do this would be supremely beyond me but hey its an idea for tightwads. Also, if this were setup on a RWD setup ( North/South orientation) you could also use this method with the adaptor reversed to point the charge air forward to plumb an intercooler
The final setup should resemble this (this was fitted with an AE92 top pipe)
For any further information, you can email me direct , removing the spam filter at adsportNOSPAM@westnet.com.au
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FYI : im using bigport cams, G LTD ECU, liberty WTA cooler, N/A throttle body , direct cold air induction, untuned SAFC-II. The car runs 0.9 Bar all day everyday and pulls F*&^king hard
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Registered:
November 2002
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Location:
Perth WA
Registered:
December 2003
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Re: Fitting SC14 to AW11gze
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Wed, 08 June 2005 07:53
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haha nothing personal or aimed at anyone dude, i always talk like that hahah !
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Registered:
November 2002
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Re: Fitting SC14 to AW11gze
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Wed, 08 June 2005 07:54
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No problems mate !
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: Fitting SC14 to AW11gze
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Wed, 08 June 2005 08:31
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and now for what counts how much power does it make how does it go how much boost does it make???
How much torque does it make over the sc12?
above all nice work!!!!
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Location:
Victoria
Registered:
May 2002
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Re: Fitting SC14 to AW11gze
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Wed, 08 June 2005 09:15
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bout time u finished this guide 
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Location:
Sydney
Registered:
September 2004
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Re: Fitting SC14 to AW11gze
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Tue, 14 June 2005 22:06
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Adsport, first of all, a big congrats on the job!!
For sooo sooo long ive been trying to find someone that has ACTUALLY done the conversion seeing as ive been a bit hesitant with it myself.
Well done, i really hope I can get to see your car sometime 
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Location:
Perth WA
Registered:
December 2003
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Re: Fitting SC14 to AW11gze
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Wed, 15 June 2005 01:25
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thanks mate, theres quite a lot of swaps been done, but none seem to have good documentation or have had to have a big budget to complete.. when i did it this way i was trying to see if i could undercut the cost of every other upgrade for the car , aiming at pulley kits first. considering i got away with this for a shade under $500 i would say it makes it rather afffordable (and stomps overdriven SC12 powered ones into the ground) . being in mind though i did all of the work myself and probably saved about 1k in labour costs due to the needed R&D. i do hope this puts a black and white answer to the grey area of "will it fit" questions that i see people ask frequently on forums everywhere.
Ive been campaining to have this put in FAQ or as sticky, i think its a rather infoprmative and useful post and one worthy of being noted.
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Location:
Newcastle
Registered:
August 2003
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Re: Fitting SC14 to AW11gze
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Wed, 15 June 2005 05:30
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Ahh wow!!!!
Good one!!!
May have been done before but I'd say this is the first full guide...
Next Q to solve.
on gze's, many try to get more boost out of the sc12 by using an oversized crnak pulley of 75mm is the max I believe.
Wonder how much overdrive a sc14 can take via larger crank pulley.
Around how much does each unit, the sc12 and sc14 weigh, or at least the weight difference.
This obviously was for the aw11, a east west engine.
Anything suggested that need be done different for a north south gze?
Once again congrates~
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Location:
Perth WA
Registered:
December 2003
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Location:
Adelaide
Registered:
January 2004
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Re: Fitting SC14 to AW11gze
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Fri, 24 June 2005 05:12
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Good work Adsport, about time someone did a tech write up on this!
I've been searching threads for ages and everyone just seems to get told 'it's been done - search' but the info's just not there to find
Now I just need an SC14 and a 4A-GZE!
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Location:
Melbourne
Registered:
March 2004
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Re: Fitting SC14 to AW11gze
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Fri, 24 June 2005 09:19
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Awsome stuff dood. Can you tell me were the boost comes on and were it drops off on this setup,I've heard they pull from nothing and rev out prety well to.
thanx joe
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Location:
Perth WA
Registered:
December 2003
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Re: Fitting SC14 to AW11gze
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Fri, 24 June 2005 12:17
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from memory (and my dodgey bar-psi conversion in my head)
6psi @ 1300 rpm
8psi @ 1800 rpm
10psi @ 2400 rpm
13psi @ 2800 rpm - 8200 rpm
Lachie : yeah i think it deserves a place on the FAQ to be honest, but then people would probably not see it in the thread list and read it , as seems to be the case with most other posts that get repeated.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Fitting SC14 to AW11gze
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Fri, 24 June 2005 12:47
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good to see someone getting off their arse to write it up  noice work!
do you find it feels like it is running out of breath up top at all? are you using standard 4A pulleys (so it's 1.4/1.2 extra boost?)
when are you doing the sprintex write-up 
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Location:
Perth WA
Registered:
December 2003
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Location:
nelson, new zealand
Registered:
October 2004
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Re: Fitting SC14 to AW11gze
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Fri, 24 June 2005 21:40
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very cool. this is EXACTLY what iv been hoping to find as an sc14 is destined for my aw11 in the nearish future!
now i just need to find someone able to rebuild them....
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Location:
Perth WA
Registered:
December 2003
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Location:
nelson, new zealand
Registered:
October 2004
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Re: Fitting SC14 to AW11gze
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Sat, 25 June 2005 07:36
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i shall name my first born after you
iv been put onto a plave over here that can supply the bearings, and iv got a donor sc12 arrivng soon and a local engine builders who rebuilds gmc chargers is willing to do the first one free as a trial to see if its doable....
watch this space
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