Supercharger On An St170 Engine

[Guest whiz]

A single maybe FINE but The throttle bodies are better and will give more power than a single

[Longboarder]

I would agree on N/A intakes and throttle response is crisper the closer to the valves the throttle is but I don't think there is much difference in flow on supercharged engines. A single large body to a plenum and individual runners to each cylinder is simple, compact and efficient. Disadvantages in individual bodies are that balancing them might be quite an art. It's also more common to place the throttle-body on the inlet side of rootes style chargers to avoid those off throttle moments when pressures can skyrocket. A big vacuum operated bypass valve will mitigate but it can be stressy for the charger and belt.

Sorry but I'm a believer in keeping it simple.

 

Nigel

Edited January 24, 2017 by Longboarder

[richardm6994]

Alternator top bracket now complete with idle pulley.

And like everything I make, it gets buried in the bottom of the engine bay never to see the light of day!!!

 

 

And of course remembering to go the right way around the water pump this time....

[Guest whiz]

Looking great buddy

[richardm6994]

Small update - lots of little jobs done that take up time but don't show much progress.

 

I've got the belt path complete and measured.....

 

 

[Longboarder]

Any problem finding a belt long enough to do that run?

 

Nigel

[richardm6994]

None whatsoever......what I do is measure the belt path using the wire with the tensioner set at either extreme of its tension position .....so in this case the belt I was looking for was somewhere between 1603 and 1640.

 

I then just eBay '6pk1620' (or whatever length I'm looking for). If there are none that size, I just change the length by 1mm in the code and search again. eventually I land on a standard size belt that fits within my range.

[richardm6994]

so after a bit of rework to the front bracket to give more belt coverage around the crank pulley, and the rear charger bracket machined / fabricated, ive now finally got the charger working.

now that the fiddle bits are done, should start making some visible progress soon;

 

[richardm6994]

So the charger inlet is now finished and added a bit of strength back into the chassis where the original brace has been removed.

Next job is now to fit all of the fuel system back into new locations to clear the big charger lump.

 

 

[jaimo]

Amazing work as always rich

[richardm6994]

Nearly posted this in the wrong supercharger thread....lol

 

Fuel system all relocated now.

The low pressure pump is situated under the charger and the swirl pot has move over a little to make room for the air filter;

 

 

 

Next job is the engine intake plenum onto the jenveys....

[richardm6994]

After a small delay, the lump of Ali has finally arrived and now to turn it into a pile of swarf.....

 

[Snapperpaul]

I have just been offered a Blacktop

The madness continues

[richardm6994]

Update time.....Engine plenum backplate and spacer machined in 1 piece and I've also been semi-successful in machining integrated bell mouths.....

 

 

[Guest whiz]

Marvellous work