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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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| | Subject | Poster | Date |
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Fitting SC14 to AW11gze
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Adsport | Wed, 08 June 2005 07:18 |
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Re: Fitting SC14 to AW11gze
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Adsport | Wed, 08 June 2005 07:19 |
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Re: Fitting SC14 to AW11gze
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Adsport | Wed, 08 June 2005 07:19 |
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Re: Fitting SC14 to AW11gze
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ra23celica | Wed, 08 June 2005 07:51 |
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Re: Fitting SC14 to AW11gze
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Adsport | Wed, 08 June 2005 07:53 |
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Re: Fitting SC14 to AW11gze
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ra23celica | Wed, 08 June 2005 07:54 |
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Re: Fitting SC14 to AW11gze
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4agte | Wed, 08 June 2005 08:31 |
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Re: Fitting SC14 to AW11gze
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gearb0x | Wed, 08 June 2005 09:15 |
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Re: Fitting SC14 to AW11gze
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mighty_boy | Tue, 14 June 2005 22:06 |
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Re: Fitting SC14 to AW11gze
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Adsport | Wed, 15 June 2005 01:25 |
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Re: Fitting SC14 to AW11gze
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no_tofu_speed | Wed, 15 June 2005 05:30 |
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Re: Fitting SC14 to AW11gze
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Adsport | Wed, 15 June 2005 11:11 |
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Re: Fitting SC14 to AW11gze
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Lachie | Fri, 24 June 2005 05:12 |
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Re: Fitting SC14 to AW11gze
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joeninety | Fri, 24 June 2005 09:19 |
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Re: Fitting SC14 to AW11gze
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Adsport | Fri, 24 June 2005 12:17 |
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Re: Fitting SC14 to AW11gze
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oldcorollas | Fri, 24 June 2005 12:47 |
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Re: Fitting SC14 to AW11gze
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Adsport | Fri, 24 June 2005 13:42 |
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Re: Fitting SC14 to AW11gze
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Mr Revhead | Fri, 24 June 2005 21:40 |
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Re: Fitting SC14 to AW11gze
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Adsport | Sat, 25 June 2005 03:08 |
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Re: Fitting SC14 to AW11gze
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Mr Revhead | Sat, 25 June 2005 07:36 |
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