N/A Supercharger Project x2

d_generate said:
Ahhhhh? you mounting that to the engine or the engine bay/inner guard where the batery was? if to the engine no prob but if you're mounting it to the inner guard the engine jumps all over the place on it's mounts so you may have trouble keeping belts tight let alone in place on the pulleys.
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I did think about that. Its mounting to the body where the battery was. If I have issues though with the belt then I will just redo the mount :raspberry:
Thus the reason only doing one car first.

I wanted to see how the one in Hatchie was mounted but never got a reply from Tristan.

Plus im not even close to an expert so fixing it to the engine to begin with is out of my league without help.
 
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Venom said:
Nice work mate! Maybe i need one of these :twisted::lol:
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One? Why stop at one?? :twisted:

taza said:
I did think about that. Its mounting to the body where the battery was. If I have issues though with the belt then I will just redo the mount :raspberry:
Thus the reason only doing one car first.

I wanted to see how the one in Hatchie was mounted but never got a reply from Tristan.
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A little research goes a long way - remember, Dave was a really active board member before some **** went down. Check this build thread ;)

Problem is that you've got the ABS in the way on the driver's side, this is where Dave's mounted his and I've seen other foresters with the same mounting location, but they probably didn't have ABS.

For someone that's not really mechanically minded it's a huge task mate! I hope it all turns out well and gives the gains you're after ;)

Cheers

Bennie
 
Bennie, Thats why I put it where the battery is. I really didn't want to touch the power steering and ABS stuff. Plus there was a radiator hose in the direct line of the belts so it was easier on the passengers side.
If the belt slips off from the engine moving, which could happen offroad then I will redo the mount.
I already put many hours research into it and have seen people both mount it to the enigne and mount it to the body on Subies. When mounting to the body it was an Outback but they didn't have any issues with the belt, but of course it wasn't offroaded.
 
I realise that you're not all mechanical etc, but personally the SC would be much better suited with engine mounting. What you need to find is all the points that you can mount the SC from, and build your bracket from there. As Dave with the help of Vidler did, you might need to put an idler pulley or two in the system somewhere to get the belt around other obstacles that are in the way.

But if you're not keen on that you might and to check out something like this to keep the belt tensioned at all times: Holden fan belt tensioner

The thing you need to watch out for is the belt tension pulling the SC towards the engine - it's going to be there all the time and if the torque twist of the engine is away from the SC that's going to add to the stress of the mounts. Probably best to plate all under where the SC is going to be mounted. If you're hard mounting it you might find that the body work will act as a big microphone for the internal noises of the SC.

I think you'll also find that those flat rib belts won't just slip off, they'll probably terminate the belt. At least you won't be stuck without a running engine if the SC belt slips off. But if you've got one of these tensioners in the system it should be sweet.

All the best with it, I'm keen to see how it goes ;)

Cheers

Bennie
 
I agree with Bennie- engine mounted is better. Long term, the mounting area on the body may fatigue as well.
 
Rally said:
I agree with Bennie- engine mounted is better. Long term, the mounting area on the body may fatigue as well.
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Ok, might have to speak to someone who can help me find some strong points on the engine for mounting...
Its pretty heavy though, a good 14kg so a few points might be needed.
 
What pulley on the motor are you running it off? gotta remember there will be massive amounts of strain on it and it's bearings too, I'd suggest you get someone to sit in the car with the hand brake on and the car in gear giving it a few revs and taking the foot on and off the clutch just to see how much the motor actually moves around.......14kg is a hell of a weight to be hanging off that skinny little bracket too, I don't want to destroy your dreams but I also don't want to hear about how your supercharger got wedged between your alternator and your radiator lol.

You really do need a massive tension wheel hanging under it somehow I think if you are to have any success at all doing it the way you are.
 
stilson said:
+1 on the motor mount for the s/c.
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Make that about +24, Taza.

Look at how superchargers are usually mounted on V8s for a clue. They tend to use the entire motor as a support. The exception is the front of the flywheel jobs, but they were never common on street cars, AFAIK.
 
I'd try some group N engine and transmission mounts to reduce engine movement.

I noticed on the serpentine belt on my liberty that the H6 has an auto-tensioner thingy, if you had something like that then it could potentially accomodate a degree of movement if you added it to you SC belt.
 
Anyone willing to help me make up an engine mount then for her whos in Perth??
Could I use both support from the engine and body. Have it supported by the engine with a bracket but also have it sitting on rubber feet?
 
If you can be patient, who could be with not one but two superchargers sitting idle, I think I mentioned earlier that you may use my w/shop. My floors in my house are being polished while I'm away so I'll need a few days to get things in order.
In the meantime I suggest you look at the mounting of your existing belt driven accessories for inspiration. Remember that while the s/c makes power, it also takes power to be driven. Ive heard the figure 50hp but I have no idea. This power is going to try to break your bracket. Belt tension needs to be consistent so that rules out mounting to the chassis unless you plan to solid mount the motor and trans also. This may cause NVH issues.(;

I'll see you when I get back!
 
stilson said:
If you can be patient, who could be with not one but two superchargers sitting idle, I think I mentioned earlier that you may use my w/shop. My floors in my house are being polished while I'm away so I'll need a few days to get things in order.
In the meantime I suggest you look at the mounting of your existing belt driven accessories for inspiration. Remember that while the s/c makes power, it also takes power to be driven. Ive heard the figure 50hp but I have no idea. This power is going to try to break your bracket. Belt tension needs to be consistent so that rules out mounting to the chassis unless you plan to solid mount the motor and trans also. This may cause NVH issues.(;

I'll see you when I get back!
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Around 10 HP, iirc.
 
I think top fuel dragsters require hundreds of horsepower to run their blowers.
 
G'day Taz

taza said:
Do you mean power loss when the charger isn't running?
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That should be very close to nil. Like the a/c compressor when you haven't got the a/c on.

The power loss when it is running is around 10 HP for a middling boost, like 4~7 psi; again IIRC. Clymer's book would tell me, but it's on a bookshelf that is behind a whole load of junk, and probably the odd redback, or two ... :iconwink: :lol:.

What rocket-fuel dragsters run (and draw) is quite another thing altogether; but estimating from 10 HP for a 4 psi boost, running a 36 psi boost would still only be around 100 HP.

That 10 HP use by the supercharger for a boost that is safe for any small engine (e.g. racing Mini Cooper S) is why they never used s/c engines. The power loss was roughly equal to the power gain, along with more heat, stress on the engine, valves, drive train, etc, etc.

When you consider the power and torque gains for (say) a 5L V8; the 10 HP pales into insignificance ...

Basically, the s/c always uses the same amount of power for a given boost, regardless of the engine it is mounted on. Turbos are quite different, hence the number of small turbo-charged engines around.
 
Any news on what's happening with this Taza - and don't give me the "I've been busy with uni" excuse as we all know it's only (dis)Orientation week this week!

Cheers

Bennie
 
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