Superchargers and Sequentials
Discussion
Just been reading
the article in this months Evo for about the 5th time:
The new TVR Typhoo is to have a supercharger.
Can anyone explain to me in Layman Terms how a Supercharger works, where its likely to sit on the 4ltr S6, on the pic on page 70 could you point it out.
Also, I know that The Typhoo sequential Box is still in Developement, and quite alot of other vehicles have them, Been told before but cant remeber how it works.
TIA
BB
the article in this months Evo for about the 5th time: The new TVR Typhoo is to have a supercharger.
Can anyone explain to me in Layman Terms how a Supercharger works, where its likely to sit on the 4ltr S6, on the pic on page 70 could you point it out.
Also, I know that The Typhoo sequential Box is still in Developement, and quite alot of other vehicles have them, Been told before but cant remeber how it works.
TIA
BB
This might give you a bit of background http://auto.howstuffworks.com/question122.htm
Basically, the supercharger compresses air being fed into the engine using a turbine driven by the engine. This is usually going to mean that it will be driven by a belt from the cam and therefore be mounted somewhere near the other belt driven ancilliaries like water pump, etc.
Basically, the supercharger compresses air being fed into the engine using a turbine driven by the engine. This is usually going to mean that it will be driven by a belt from the cam and therefore be mounted somewhere near the other belt driven ancilliaries like water pump, etc.
Sequential boxes have been used on motorbikes for years: instead of a set of rails with forks attached, which allow you to swap from any gear to any other (in effect), on a (bike) sequential there's a drum with grooves machined into it. The up/ down shift is spring-biased to the centre; every up or down action turns the drum by a number of degrees that causes the selector forks (which are located in the drum grooves by pegs) to move as necessary to select the appropriate gear. One of the nice things on a bike is making clutchless changes; drag bikes tend to have air shifters to make the changes even quicker. I suppose you could do it on a car, too.....
Ian
Ian
wedg1e said:
on a (bike) sequential there's a drum with grooves machined into it. The up/ down shift is spring-biased to the centre; every up or down action turns the drum by a number of degrees that causes the selector forks (which are located in the drum grooves by pegs) to move as necessary to select the appropriate gear
[pedantic]...apart from on some pre-unit gearboxes like norton/villiers, where the fork pegs ran in grooves on a flat disk mounted at right angles to the shafts. The gearchange then moved the disk a number of degrees...[/pedantic]
WB
LexSport said:
This might give you a bit of background http://auto.howstuffworks.com/question122.htm
Basically, the supercharger compresses air being fed into the engine using a turbine driven by the engine. This is usually going to mean that it will be driven by a belt from the cam and therefore be mounted somewhere near the other belt driven ancilliaries like water pump, etc.
Didn't think there were any turbines in a supercharger. The only one I've taken apart had what looked like two giant cogwheels with a small gap in between which was the space the air occupied.
Do you have any links to a description of a working turbine supercharger as I would be very interested to see. (I'm building a jet engine from scratch and am getting morbidly fascinated by their use)
Julian64 said:
Didn't think there were any turbines in a supercharger. The only one I've taken apart had what looked like two giant cogwheels with a small gap in between which was the space the air occupied.
Do you have any links to a description of a working turbine supercharger as I would be very interested to see. (I'm building a jet engine from scratch and am getting morbidly fascinated by their use)
There are a number of different styles/types of supercharger. I think the one you opened up is refered to as a rootes type, but there's also a screw type and rotor type that I know of. I think there's an article in 'retro cars' magazine this month. Quite an interesting Mag.
>> Edited by Alpineandy on Thursday 19th February 10:12
Julian64 said:
Didn't think there were any turbines in a supercharger. The only one I've taken apart had what looked like two giant cogwheels with a small gap in between which was the space the air occupied.
Do you have any links to a description of a working turbine supercharger as I would be very interested to see. (I'm building a jet engine from scratch and am getting morbidly fascinated by their use)
A quick search on the web threw this up: www.superchargeronline.com/content.asp?ID=15
The rest of the site looks like it might be worth a read to get the background.
As for the Jet Engine - very cool. I spent pretty much an entire day glued to Discovery H&L over Christmas watching a series building a scale jet transport aircraft. Very sad I know, but fascinating none the less.
LexSport said:
Didn't think there were any turbines in a supercharger. The only one I've taken apart had what looked like two giant cogwheels with a small gap in between which was the space the air occupied.
Do you have any links to a description of a working turbine supercharger as I would be very interested to see. (I'm building a jet engine from scratch and am getting morbidly fascinated by their use)
A quick search on the web threw this up: www.superchargeronline.com/content.asp?ID=15
The rest of the site looks like it might be worth a read to get the background.
As for the Jet Engine - very cool. I spent pretty much an entire day glued to Discovery H&L over Christmas watching a series building a scale jet transport aircraft. Very sad I know, but fascinating none the less.
good site, thanks
Julian64 said:
Didn't think there were any turbines in a supercharger. The only one I've taken apart had what looked like two giant cogwheels with a small gap in between which was the space the air occupied.
Do you have any links to a description of a working turbine supercharger as I would be very interested to see. (I'm building a jet engine from scratch and am getting morbidly fascinated by their use)
Rolls Royce Merlin used a crank driven turbine supercharger if I remember correcly
Most dog boxes have straight cut gears. Synchro boxes almost always have helical cut gears. Its the straight cut gears that make nearly all the noise. Also a racing box has slide on gears and these rattle around. Synchro boxes don't normally have these either. Quaife make Sequential boxes with either straight or helical cut gears.
...and in a bike dog box all the gears [all straight cut] are in constant mesh. And of course no syncro. Running and bike, and having run a bike engined car, it certainly livable with - but clunky compared with a car box. Great on bikes, and cars on track days. Not so great in te BEC in traffic.
WB
WB
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