New to forum, but not the GS

[SAFE-T]

Looks like there are some on this forum on the attack.

Well, others on this same board have detonated GS500 bottom-ends, so I guess it's to be expected when a stranger shows up saying he has a GS that makes 6 times the stock hp. This is the internet, after all. You could have been JB848.

[burning1]

Most of the blown up bottom ends were from oiling issues. AFAIK, the only GS I heard of that was twisting cranks was the monster 650cc build.

[comradeiggy]

When in January? I'd like to see this thing.

[guilfordin]

I'll be running the bike at Bradenton Motorsports Park in Florida, 1st and 2nd week in January, test and tune events.

Note to Safe T:  The design of the crankshaft in the GS500 and previous GS450's is of excellent design.  You won't find another parallel twin with four main bearings, and a one piece forged crank.  As I mentioned in other posts, I do not run
the factory recommended lubricants, and I definately do not use synthetic in any machine I own.  Running straight 50W racing oils (any brand) will give you a better cushion between your babbit and the journals.  I also reduced my pressure to 40PSI.  And I run the stock Suzuki oil filter. 
Getting 6 x the stock HP is not that hard, when you mix methanol with three times the air of your stock motor.  FWIW, wait till I post the next dyno work with the latest changes. I can't guarantee any numbers, but getting 210 (7 times stock) will definately be attainable.
I assume you did watch the Youtube video previously posted.  Those were runs were at  20% throttle position.  Watch closely at the throttle hand.  We have it calibrated in 20% increments, and are very careful to hold that at exactly that opening.  Thats why it takes so long to spool up to the 11K rev limiter.   This is a complex machine, with emphasis on maximum power, minimum heat, and hopefully, decent longevity.  Complete teardown after each session, has not shown any abnormal wear so far.  And these are the same bearings/crank etc., from the 1989 donor bike, with 20K miles.  I did not even change out the stock units as they were in spec.

 

[burning1]

What's the reasoning behind dropping the oil pressure?

[guilfordin]

40psi is all I need.  Higher pressures can rupture oil filters, blow out seals, plus that oil pump is a horsepower robber.  Remember though, I am running a straight 50W racing oil.  Its like syrup.  The oil does not break down easily from methanol blow by, which is a problem in high boost applications.  My oil level rises with each hard run and so I have to change the oil and filter after three or four hard pulls.

[guilfordin]

Update.  Even with the new digital boost controller, I could not get the kind of control I wanted.  Last night I installed a new TD05-3 Mitsubishi turbo, that will cure that early high boost charge, plus give me about 40% more air.  Waiting on some additional hardware, then back to the dyno next week.  Will have to remap the system, but I expect to see a more uniform rise in boost pressure, which will help overcome the wheelspin I don't need.  Will post a video of our testing.
Gary

[reload]

hey, just went through the thread. you are a crazy man...i like.

[guilfordin]

More mods to my bike the past month, upsized the turbo, digital boost controller, reworked manifolds and airshifter.  Also added an additional large capacity breather in the left side cover, I'm getting a lot of blow-by thats pushing oil out of the top breather, which had been tripled in size previously.  Just finished installing another 6 pound turbo evacuation pump and connecting AN/8 lines and fittings, and relocated the turbo engine drain location in the upper left portion of the case, forward of the countrersproket area.  With the methanol fuel pump and this evac pump, I'm pulling 18 amps on a total loss system.  Two batteries, one for the motor loads and the other Shoria for the electronics and FI drivers.  Tomorrow evening we go back on the Super Flo for another session.  Will be posting that on YouTube, and will provide a link.

Also, I posted some information on the Bonneville thread regarding the new location for the ECTA, East Coast Timing Associations new location, Wilmington Ohio, between Cincinnati and Columbus.  I'll have my bike there for the April 28th & 29th meet, along with a slew of riders, I'm sure.  $10 admission one day, $15 both.  Bring your rides out, get some seat time on a sanctioned, world class records can be set.  You can get more information regarding membership and pre registration at ecta-lsr@hotmail.com 

Gary

[steezin_and_wheezin]

can't wait to see the new setup! this thing keeps getting better and better 

[knowles]

You remind me of some good old boys that i know, it is utterly amazing what they and you can and have built, i wish you lived closer to me. good luck.

[TheGoodGuy]

I think we should do a GS bonnerville meetup to see this sucker run!!!!

[knowles]

I wont be able to make it but i have to see the vid of it going.

[burning1]

guilfordin,

How did you make the start nut on this bike? It looks like some sort of bearing/splined shaft?

[GSnoober]

/over my shoulder:

Honey, we're moving to Guilford, Indiana; start packing NOW!

Incredible build; where can we see this monster in action? Finally, someone has justified my 30+ years faith in the "primitive" GS450/500 engine by building one for the ages. Hope you ride it to the ends of the earth...

[crzydood17]

anyone know what happened to this dude? also BRAAAAAAIIIINNNSSSSS

[mustangGT90210]

Well I know he didn't crash the bike at Bradenton lol

Really wish I would have known about this thread when it was still active, I work the water box at those test and tune events, and did then as well. Don't recall seeing it, but didn't even know what a GS was back in 2011

[weedahoe]

His profile shows him logged on yesterday so he is still around. This is an awesome build and Im glad someone bumped it. Someone should PM him and get him back out in the open