All there is to know about TSCC

[ohgoodtimes]

TSCC (Twin Swirl Combustion Chamberr)

SUZUKI has introduced a new breed of 4-valves-per-cylinder high-performance 4-stroke engines -- The TSCC series. TSCC describes the heart of the engine, the Twin Swirl Combustion Chamber.

What the TSCC engine series does better than conventional 4-stroke eninges, either 2 valve or 4 valve, is to improve on the two major factors which affect engine performance, charge burning efficiency and intake charging efficiency.

First, charge burning efficiency. The TSCC system consists of a subtle, yet unique shape machined into the head. Each of the two intake valves is set into adjoing semi-hemispherical depressions in the head. During the intake stroke these depressions channel the incoming fuel/air mixture to form two seperate high-speed swirls.

During the compression stroke the squish areas machined in the front and the rear of the cylinder head's combustion chamber accelerate the speed of the swirls. Thus, when the spark plug ignites the mixture, the flme spreads rapidly and completes the combustion more quickly.

To further aid burning efficiency, the spark plug is centrally located, the ideal location. This results in the shortest possible path for the flame to travel.

[mriddle]

You getting this Josh ?

[80GS750]

interesting.....

[80GS1000]

What's cool is that the same TSCC tech introduced in the GS series is still being used on all Suzuki's 16 valve modern bikes, like the GSXR, Bandit etc.

[Nessism]

Too bad the TSCC concept didn't develop beyond 1983. Twin swirl was not significant compared to the compact combustion chamber design brought on by the shallow included valve angle combustion chamber shape.

Four valve per cylinder is a superior design, no doubt. Which matters not when it comes to classic vehicles - we don't love them because they have the best technology, but rather because they have character.

[ohgoodtimes]

Too bad the TSCC concept didn't develop beyond 1983. Twin swirl was not significant compared to the compact combustion chamber design brought on by the shallow included valve angle combustion chamber shape.

Four valve per cylinder is a superior design, no doubt. Which matters not when it comes to classic vehicles - we don't love them because they have the best technology, but rather because they have character.

Doesn't the compact combustion chamber just increase the compression ratio slightly. The R1 went from 12.4 to 12.7. Also CCS uses TSCC as well. I dont think the are competing technologies. And for the most part isn't CCS applied to turbines?

[80GS1000]

Too bad the TSCC concept didn't develop beyond 1983. Twin swirl was not significant compared to the compact combustion chamber design brought on by the shallow included valve angle combustion chamber shape.

Four valve per cylinder is a superior design, no doubt. Which matters not when it comes to classic vehicles - we don't love them because they have the best technology, but rather because they have character.

What's the shallow included valve angle combustion chamber shape? Do modern engines use this? The Gixxers still use TSCC.

[Mysuzyq]

Too bad the TSCC concept didn't develop beyond 1983.
Which matters not when it comes to classic vehicles - we don't love them because they have the best technology, but rather because they have character.

TSCC seems to be alive & well in the '08 Hayabusa....quite a technologically advanced bike, most would agree.

http://myweb.tiscali.co.uk/hayabusa/SPEC.htm

Tony.

[Billy Ricks]

The big reason for compact combustion chambers with relatively flat roofs is to use flat pistons while still retaining desired compression ratios. Flat topped pistons retain less heat and don't interfere with the flow of gasses in the cylinder or flame spread upon ignition.

[Nessism]

Back when Suzuki started with 4 valve heads and they coined the TSCC concept, the head (combustion chamber) had little ramps around the valves and the valves sat down in pockets, so as to promote rotation of the mixture as it flowed into the combustion chamber. These same ridges/ramps don't seem to be present in the heads anymore on modern Suzuki’s. I think Suzuki stayed with the marketing concept of TSCC to try to create some marketing separation from the other manufacturers so as to maintain the concept as part of their heritage. Not trying to say Suzuki doesn't make a nice engine, they do, just saying that TSCC is just a marketing concept these days. The real technology is in the shallow combustion chamber shape, not the silly ramps they used to use.

[TheCafeKid]

TSCC is indeed a tech advance for the GSs and later bikes. I have never once knocked the concept, its sound, and proven. My 1100, and your 1100, are TSCC motors. My knock is the **** poor oiling design Suzuki used in the TSCC 750 motors from 80-82. The one blemish on an otherwise outstanding line of motorcycles thru the brand years, and it was rectified rather quickly. Think of this, with as much as we KNOW how Suzuki didnt like to re-tool for anything if they could help it, the fact that the 83 and on 750 motors were a near complete re-design speaks volumes about their realization of the problems with the predecessor. The update in 83 was significant, and the motor was a much more sound design. Compact, lightweight and better flow thru the oiling system.

[Geoff4130]

I had wondered what that meant. It's on the side of my motor but I never Googled it. Thanks ohgoodtimes!

[Nessism]

TSCC is indeed a tech advance for the GSs and later bikes. I have never once knocked the concept, its sound, and proven. My 1100, and your 1100, are TSCC motors. My knock is the **** poor oiling design Suzuki used in the TSCC 750 motors from 80-82. The one blemish on an otherwise outstanding line of motorcycles thru the brand years, and it was rectified rather quickly. Think of this, with as much as we KNOW how Suzuki didnt like to re-tool for anything if they could help it, the fact that the 83 and on 750 motors were a near complete re-design speaks volumes about their realization of the problems with the predecessor. The update in 83 was significant, and the motor was a much more sound design. Compact, lightweight and better flow thru the oiling system.

I recently bought a '83 750 and did the valves today. Bike only has 11k miles but is reputed to be an old magazine test bike so I suspect it's been used hard. Was very pleased to see the condition of the cams; they truly look like brand new. Was expecting to see some wear since they use rocker arms which are not as durable as the 8v engines bucket and shim valve train. At any rate, the '83+ 750 engines does seem to be pretty solid from what I can tell so far.

[trippivot]

RFVC = honda radial four valve configuration
YICS = yamaha yamaha induction control system
TSCC = suzuki we know

the late 70s' what a time to have technology..

[Geoff4130]

RFVC = honda radial four valve configuration
YICS = yamaha yamaha induction control system
TSCC = suzuki we know

the late 70s' what a time to have technology..

If I remember correctly in the early 80's Porsche was the first to use a variable valve timing - vtec to Honda people.