Wanna Argue?

General discussion about Street two-stroke Suzuki motorcycles.

Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan

Post Reply
User avatar
Coyote
Moto GP
Posts: 3404
Joined: Tue Oct 21, 2008 2:41 pm
Country: USA
Suzuki 2-Strokes: GT550x2, GT750, GS1000
Location: Tulsa, Oklahoma

Wanna Argue?

Post by Coyote »

I still contend the Ram Air shroud is a useless gimmick. Think about it.
The shroud is off. You're driving down the road. Air is passing through the fins on the head.
You put the shroud back on and go again. Air is passing through the fins on the head. More air than before? Impossible. Probably less.
Shroud is off. You're is stop and go traffic. The heat is dissipating off at a normal rate.
Shroud back on. Same stop and go traffic. Heat is trapped under the shroud and can't dissipate as efficiently as it could without it.
I have always felt this way about the shrouds on the GT380 and GT550 and I doubt you could ever change my mind. It's just plain old common sense.
I was born with nothing and still have most of it left.

.
1978 GS1000C
1976 GT550 ongoing money pit.
yeadon_m
Road race school
Posts: 792
Joined: Sun Aug 05, 2012 1:18 am
Country: UK
Suzuki 2-Strokes: GT380B, GT550B, GT750A, GSX1400

Re: Wanna Argue?

Post by yeadon_m »

Its shiny and I like bling. Er, thats it. Probably all you write is valid. OTOH I believe these bikes are not supercritical on cooling, as expected for an aircooled bike, which by design has to be massively overcooled, or we'd see a huge number killed by heat seizure, and we don't.
In the end, fit or leave off, as the owner chooses, is OK.
Cheers,
Mike
Craig380
Expert racer
Posts: 1254
Joined: Mon Dec 01, 2008 2:52 am
Location: Manchester, UK

Re: Wanna Argue?

Post by Craig380 »

In theory, the Ramair cowling should help with cooling a little bit because of the funneling effect - but they're probably only truly effective at speeds higher than the bikes are actually capable of achieving.

Kawa triples were always in a higher state of tune and managed without Ramair.

It's a bit like the 'ram air' induction scoops and hoses on modern superbikes: they look great and racy, but back-to-back dyno tests with and without them have shown that they make less than 1% difference in bhp, even with the bike on a wind tunnel rig pushing air at 70+ mph. The actual increase in pressure within the airbox is like 0.5psi above ambient.
1976 GT380 - wounded by me, and sold on
2006 SV650S - killed by a patch of diesel and a kerb in Feb 2019
2017 SV650 AL7 - naked and unashamed
Vintageman
Expert racer
Posts: 1485
Joined: Tue May 18, 2010 5:38 pm
Country: USA
Suzuki 2-Strokes: Suz, Yam, Honda, Kaw.
Location: New Hampshire

Re: Wanna Argue?

Post by Vintageman »

Keep center cylinder cooler ... scopes air above and directs it down.

Dampens noise that otherwise radiates from head fins

The later years looks like a German Stahlhelm WWII helmet.

If you run without, add an extra fin each side to fill int the gap. sean that done on a gt380 (can't find now) looked nice
Current registered, inspected, and running well 2 stroke motorcycles
74 GT250 (T350 upgrade),
76 GT250 (T350 upgrade),
71 T350,
70 T350,
74 GT380,
75 T500,
73 GT550,
75 GT750,
72 Yamaha DS7 (R5 upgrade),
77 Yamaha RD400 (Daytona Cyls),
73 Kawasaki H1 500
User avatar
Coyote
Moto GP
Posts: 3404
Joined: Tue Oct 21, 2008 2:41 pm
Country: USA
Suzuki 2-Strokes: GT550x2, GT750, GS1000
Location: Tulsa, Oklahoma

Re: Wanna Argue?

Post by Coyote »

If you run without, add an extra fin each side to fill int the gap.
That's the only reason that I will eventually put the shroud back on. The head does not look complete without it, and I don't know how I would ever match the cast fins that are there. It's really missing 2 fins per side.
I was born with nothing and still have most of it left.

.
1978 GS1000C
1976 GT550 ongoing money pit.
Vintageman
Expert racer
Posts: 1485
Joined: Tue May 18, 2010 5:38 pm
Country: USA
Suzuki 2-Strokes: Suz, Yam, Honda, Kaw.
Location: New Hampshire

Re: Wanna Argue?

Post by Vintageman »

Found it.

Looks like he added two fins. Now it looks nice!

https://www.youtube.com/watch?v=hcqMagUAgjk" onclick="window.open(this.href);return false;
Current registered, inspected, and running well 2 stroke motorcycles
74 GT250 (T350 upgrade),
76 GT250 (T350 upgrade),
71 T350,
70 T350,
74 GT380,
75 T500,
73 GT550,
75 GT750,
72 Yamaha DS7 (R5 upgrade),
77 Yamaha RD400 (Daytona Cyls),
73 Kawasaki H1 500
GT750Battleship
Road race school
Posts: 841
Joined: Tue Feb 19, 2013 2:45 am
Country: Australia
Suzuki 2-Strokes: Suzuki GT750A 1976
Location: Sydney New South Wales

Re: Wanna Argue?

Post by GT750Battleship »

:up: nice bike,he's done a good job on that head,nearly looks factory !
Cheers,
Roger.
GT750Battleship.
User avatar
Coyote
Moto GP
Posts: 3404
Joined: Tue Oct 21, 2008 2:41 pm
Country: USA
Suzuki 2-Strokes: GT550x2, GT750, GS1000
Location: Tulsa, Oklahoma

Re: Wanna Argue?

Post by Coyote »

I like the invisible air cleaners. That front end is almost exactly like I did with ReddZone. Same drilled rotors and same trailing calipers. The front fender is the same too, except his is on backward,
I was born with nothing and still have most of it left.

.
1978 GS1000C
1976 GT550 ongoing money pit.
pearljam724
AMA Superbike
Posts: 1681
Joined: Tue Jul 24, 2012 11:45 pm
Country: U.S.
Suzuki 2-Strokes: 75- GT 550 / 76- GT 750
Location: SW PA

Re: Wanna Argue?

Post by pearljam724 »

The topic reminds me of an experience a few summers ago. Stopped to fuel, a guy approaches me and asks. " Hey, is that one of them Ram Airs ? I used to have one of those. " :mrgreen:
Image Image
Post Reply