Author Topic: gtmotocycles GTM01 1400 CC Tonti merged threadfest .  (Read 49501 times)

Offline fotoguzzi

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #180 on: January 02, 2019, 07:01:22 PM »
MINNEAPOLIS, MN

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #181 on: January 02, 2019, 07:21:49 PM »
 Just add fairy dust ...

 Dusty

Offline LowRyter

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #182 on: January 02, 2019, 08:13:19 PM »
I don’t know how you could have missed it John? 

It was a pretty recent thread, it went on for days on end.   It was a good one if you like two sides arguing politics!   I fell on the nonbeliever side myself, but I’d love to see some independent specs.

OK,  sorry to drag up an old thread.  Don't think I ever saw this thread (or had forgotten it) since I was out of the country in Sept when it was first posted.

I am pouring lighter fluid on my laptop now............. :violent1:
« Last Edit: January 03, 2019, 12:44:18 AM by LowRyter »
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Offline groundhog105

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #183 on: January 02, 2019, 08:29:59 PM »
A mid 80s, sub 1000cc two valve motor making a reliable 100hp at the wheel???

That sounds like someone’s doing a few to many lines.

Look up the bikes that Dr John built and endurance raced in the mid 80s.  I believe that his 2 valve Lemans modified was making about 100 hp and was very reliable in race conditions.  Bill Ross land speed 2 valve modified racer has many runs on it and has not failed.  Just two that I know of.

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #184 on: January 02, 2019, 09:39:13 PM »
Okay, maybe I can give you that, for race conditions.   But how often was Dr. John tearing down those motors for overhaul?   I don’t know, but some body here surely does, I have to think they didn’t go more than 4-5 races without out some sort of tear down?

I’m talking every day drivability, maybe some head work around 80,000 reliability!
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Offline JohninVT

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #185 on: January 03, 2019, 03:49:52 AM »
Lowryter.  Be prepared for the poopors, naysayers and people calling bullshit.  Personally I have seen the bike and the Dyno sheets.  This is not a 1400 that’s in the California and other 1400 models.  It’s using ported 1200 heads, high compression pistons, custom cams and exhaust and intake. The whole motor is balanced.   I find it pretty amusing that the some of the “experts” here will call bullshit on GuzziTech build but don’t bat an eye in excepting a higher HP and torque claims from a 4 Valve twin of another brand.  I don’t get why it is difficult to accept that a mid eighties 2 valve Lemans motor could reliably make 100 HP but a modern Guzzi 1400 4 valve that is modified cannot make 140 HP.
     Todd at GuzziTech has put a lot of time and development into the bike and it is a beauty build.

You must be the only person who's been allowed to see the dyno results.  If the sheets really say the bike has 140hp at the wheel, I suspect that a stock V7 on the same dyno would show 75-80hp. 

Offline janguzzi

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #186 on: January 03, 2019, 06:00:10 AM »
I think the visual design is not good - the "old" V7 tank does not fit to the rear at all.
It needs a flat design e.g. a Griso tank.

The price is ridiculous.
« Last Edit: January 03, 2019, 08:14:03 AM by janguzzi »
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Offline Luap McKeever

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #187 on: January 03, 2019, 07:38:41 AM »
Well, one thing is a fact; Todd has built something that has gotten people talking. Credit where credit's due.
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Offline kingoffleece

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #188 on: January 03, 2019, 07:46:58 AM »
It's been most entertaining to say the least.
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Offline JohninVT

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #189 on: January 03, 2019, 09:09:29 AM »
Look up the bikes that Dr John built and endurance raced in the mid 80s.  I believe that his 2 valve Lemans modified was making about 100 hp and was very reliable in race conditions.  Bill Ross land speed 2 valve modified racer has many runs on it and has not failed.  Just two that I know of.

The bike he won Daytona with was a Daytona 1000 4 valve prototype from the factory and it had 95hp.  His two valve race bikes didn't have 100hp at the wheel.  The MGS-01 had 120 at the crank, which is about 100hp to the wheel from 1,225cc.  A Griso 8 valve has about 90hp at the rear wheel.  There's just no way you can go from 1150 to 1400cc with a Griso engine and gain 50hp.  No amount of ECU trickery is going to net a 50hp gain with a 250cc bump in displacement.  Not with a cam.  Not with an obnoxious exhaust.  Not with an ECU map. 

If his claim was 140 at the crank from 1400cc, I could believe that.  It would be almost 120 to the wheel.  That would be impressive but relatively credible.       

Offline Tusayan

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #190 on: January 03, 2019, 09:26:51 AM »
The bike he won Daytona with was a Daytona 1000 4 valve prototype from the factory and it had 95hp.  His two valve race bikes didn't have 100hp at the wheel.  The MGS-01 had 120 at the crank, which is about 100hp to the wheel from 1,225cc.     

The 140 RWHP figure for so bike is clearly nonsense but I think your numbers for the other bikes are a little low: an A-kit '93 Daytona or Centauro makes about 93 RWHP and a world-spec C-kit RS (stock engine) makes about 102 RWHP.  I'd expect that Todero's prototype engine in the Dr John Daytona made well over 100 RWHP.  The MGS-01s made considerably more than that due to roughly 20% greater displacement and some additional development work.  My weak memory says the 120 HP number may have been at the rear wheel, which would be proportional to the displacement increase.

Offline JohninVT

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #191 on: January 03, 2019, 10:06:06 AM »
The 140 RWHP figure for so bike is clearly nonsense but I think your numbers for the other bikes are a little low: an A-kit '93 Daytona or Centauro makes about 93 RWHP and a world-spec C-kit RS (stock engine) makes about 102 RWHP.  I'd expect that Todero's prototype engine in the Dr John Daytona made well over 100 RWHP.  The MGS-01s made considerably more than that due to roughly 20% greater displacement and some additional development work.  My weak memory says the 120 HP number may have been at the rear wheel, which would be proportional to the displacement increase.

Power increases are never proportional to a displacement increase without additional factors.  They're even less proportional when you have two giant cylinders rather than 4 or 6.       

Offline Tusayan

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #192 on: January 03, 2019, 10:19:26 AM »
A stock street tune C-kit 992 cc Daytona RS makes 102 RWHP, as delivered in markets other than the US and Switzerland etc.  An MGS-01 that has over 20% more displacement and was delivered in race tune will obviously make substantially more than 100 RWHP. 
« Last Edit: January 03, 2019, 10:22:17 AM by Tusayan »

Offline LowRyter

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #193 on: January 03, 2019, 10:32:21 AM »
is there any documentation regarding the internals of the engine?  Are the reciprocating parts lighter and balanced?  Heads, valves and cams changes?  Has the redline been upped?

With a high twin cam design, it's possible to get it to run more rpms.

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Offline Dilliw

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #194 on: January 03, 2019, 10:39:11 AM »
is there any documentation regarding the internals of the engine?  Are the reciprocating parts lighter and balanced?  Heads, valves and cams changes?  Has the redline been upped?

With a high twin cam design, it's possible to get it to run more rpms.



My understanding is that Todd is using the 1380cc heads, custom cams, dual throttle bodies, higher compression, and 8,750rpm to get his number.  At least that was what was posted early on for his build.


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Offline LowRyter

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #195 on: January 03, 2019, 10:48:45 AM »
My understanding is that Todd is using the 1380cc heads, custom cams, dual throttle bodies, higher compression, and 8,750rpm to get his number.  At least that was what was posted early on for his build.

So, another 2k RPMs, better breathing and compression?  I'd imagine he'd gain some power numbers.
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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #196 on: January 03, 2019, 11:02:36 AM »
https://www.cycleworld.com/gt-motocycles-gtm-01-moto-guzzi-custom-is-fast-and-beautiful

In that article for Cycle World, 11/30/18, it lists some specs:

"Eagan claims 140-plus hp and 115-plus pound-feet of torque from the 90-degree, eight-valve V-twin that began its life as a 1,151cc Griso powerplant. Custom cam profiles and ECU tuning add nearly 65 hp and 40 pound-feet of torque over the stock unit as the entire system breathes and exhales through a short Y-pipe intake and GTM X-Fire exhaust system. Beautiful and functional."

FWIW, the author claims to be a Guzzi convert from his test ride of this machine.

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Offline kidsmoke

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #197 on: January 03, 2019, 11:12:48 AM »




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Offline tonUPRacer

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #198 on: January 03, 2019, 11:32:56 AM »
can't afford it, glad I don't like it. chances are he's aiming for clients that don't visit this forum or do their own wrenching and they like to use the word, "bespoke". Good luck on the build, he does do a great deal of work on Guzzi's and many folks are very happy with his products. I've purchased some small items from him and I'm glad he's out there doing stuff for Guzzi.
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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #199 on: January 03, 2019, 11:54:47 AM »
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Offline Dilliw

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #200 on: January 03, 2019, 12:02:10 PM »
So with nothing better to do I've read a few threads on getting more out of the 8v motor (not sure why but anyway):

Beetle dyno'd at 100hp and 80 ft lbs with his Griso 14.
A customer of Todd's with a Cal 1400 got 100hp with fueling and pipes.
The "Radical Guzzi" 1380cc build dyno'd at 118hp and 100 ft lbs corrected for Denver (5,500ft).  Stelvio motor with 1,380cc heads and cams, carbs and electronic ignition.

Splitting difference, I'd say you could reasonably expect to get 110hp and 90 ft lbs out of a 8v/1,380cc conversion depending on location, dyno and tuning preferences.  So Todd has to get 25% more hp out of his "magic potion"  that includes higher compression and higher revs. 
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Offline Luap McKeever

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #201 on: January 03, 2019, 12:25:34 PM »
Appears to me the bulk of the back and forth discussion on this topic is about HP.  Who cares what someone claims? I know that I don't. 

That said, I will tell you that I dyno'd my X21 having 231 HP.  Believing it or not is up to you. Nothing more will change in your life based on my claim :evil:

Maybe time to move on. FWIW, I hope he sells a semi-truck load of them. Anyone going Guzzi, regardless of the Guzzi or where it came from is a win in my book. We need more riders of our brand.

Disclaimer: I do not know Todd. Never met him. Never spoken with him. Couldn't tell you who he was in a lineup of 2 people. But, he is doing no harm whatsoever to the brand.
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Offline earemike

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #202 on: January 03, 2019, 02:59:43 PM »
The 140 RWHP figure for so bike is clearly nonsense but I think your numbers for the other bikes are a little low: an A-kit '93 Daytona or Centauro makes about 93 RWHP and a world-spec C-kit RS (stock engine) makes about 102 RWHP.  I'd expect that Todero's prototype engine in the Dr John Daytona made well over 100 RWHP.  The MGS-01s made considerably more than that due to roughly 20% greater displacement and some additional development work.  My weak memory says the 120 HP number may have been at the rear wheel, which would be proportional to the displacement increase.

The RACECO 1288 Daytona’s maxed out at 140/145hp. The bloke that programmed the efi on mine ended up getting work with a race team (4 wheels). I was told by the new owner that the 1288 made his MGS01 feel like a postie scooter.

These were pretty extreme explorations rather than some head Work!
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Online Huzo

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #203 on: January 04, 2019, 02:02:49 AM »
Can't we just tell the truth ?
Ugly as a hatful of arseholes..! It doesn't matter how big it's calculated power figure is...
« Last Edit: January 04, 2019, 02:09:10 AM by Huzo »

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #204 on: January 04, 2019, 02:07:35 AM »
Appears to me the bulk of the back and forth discussion on this topic is about HP.  Who cares what someone claims? I know that I don't. 

That said, I will tell you that I dyno'd my X21 having 231 HP.  Believing it or not is up to you. Nothing more will change in your life based on my claim :evil:

Maybe time to move on. FWIW, I hope he sells a semi-truck load of them. Anyone going Guzzi, regardless of the Guzzi or where it came from is a win in my book. We need more riders of our brand.

Disclaimer: I do not know Todd. Never met him. Never spoken with him. Couldn't tell you who he was in a lineup of 2 people. But, he is doing no harm whatsoever to the brand.
I don't recall anyone decrying the fact that something new from "Guzzi" is being foisted on the buying public.
I get the feeling that it's the non factual claims being used to bolster the perceived desirability of the half baked concoction that irks those who are knowledgable enough to see the deceit..

Offline JohninVT

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #205 on: January 04, 2019, 07:04:02 AM »
I don't recall anyone decrying the fact that something new from "Guzzi" is being foisted on the buying public.
I get the feeling that it's the non factual claims being used to bolster the perceived desirability of the half baked concoction that irks those who are knowledgable enough to see the deceit..

Eggs-attlee.  That is my issue with it.  I actually think it's pretty cool and if the bike had a 3-6" longer tail section and dual seat it would look great.  I also think it would be a blast to ride.  You'd be deaf after an hour or so from the exhaust(or lack of one) but it would be fun until then.   

Offline LowRyter

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #206 on: January 04, 2019, 10:14:57 AM »
Can't we just tell the truth ?
Ugly as a hatful of arseholes..! It doesn't matter how big it's calculated power figure is...

John L 
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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #207 on: January 04, 2019, 12:59:11 PM »

His mouth looks like Pete's pet emu on another thread..!

Offline LowRyter

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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #208 on: January 04, 2019, 02:50:37 PM »
Huzo-  better than damn killer bird!

I don't think I'd stroll around down there without 12 ga in my hands.  I even remember the thread about the crazy neighbors much less the snakes, dogs and killer birds.  I understand the whole place was settled as a prison- it sounds as bad as Oklahoma which was home to all the outlaws (James Boys, Belle Starr, Dalton's, Pretty Boy Floyd, even John Wilkes Booth).    :evil:
« Last Edit: January 04, 2019, 03:01:24 PM by LowRyter »
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Re: gtmotocycles GTM01 1400 CC Tonti merged threadfest .
« Reply #209 on: January 04, 2019, 03:59:54 PM »
Huzo-  better than damn killer bird!

I don't think I'd stroll around down there without 12 ga in my hands.  I even remember the thread about the crazy neighbors much less the snakes, dogs and killer birds.  I understand the whole place was settled as a prison- it sounds as bad as Oklahoma which was home to all the outlaws (James Boys, Belle Starr, Dalton's, Pretty Boy Floyd, even John Wilkes Booth).    :evil:
Damn right.
I have never had a confrontational encounter with one, but when up around Daintree and such in the sub tropics, I have seen them wandering.
They are barrel chested things, with a body like a 44 gallonn drum...!


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