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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: Sidsevensixtwo » Mon Aug 20, 2018 5:35 pm

OK, thanks :)

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: Hellgate » Mon Aug 20, 2018 5:57 pm

The XVS conversation is really straight forward. Add high compression pistons and high lift cams and the bike is much more zippy.
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Tue Aug 21, 2018 12:38 am

What Hellgate said, but compare the hi-comp pistons - the set Hellgate got appears to be pretty good, the one CRD Nick bought is absolute rubbish and he has been suffering detonation issues ever since and is now converting back to stock pistons and ultimately welded up heads.

Bonus of welded up heads: You always take the the compression increase to the next set of pistons and can stick to standard pistons which are readily available.
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: Hellgate » Tue Aug 21, 2018 4:56 am

Mine are JE, which ones did Nick buy? My CR is 10.6:1. I've had no problem at all. It's very much a more powerful version of at stock bike, not a temperamental race bike.
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Tue Aug 21, 2018 3:18 pm

Yup, I can totally agree with your description. With yours probably being a bit faster than mine due to higher final compression ratio. Nick got his from PCS, I think, but also they were 11.x:1 pistons and they just don't work from a flow perspective and create terrible hotspots in the combustion chamber.
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: Hellgate » Tue Aug 21, 2018 5:30 pm

I wonder if he cc'd the heads?

That's interesting as their site doesn't list 11:1's. In the information section they specifically call out not using 11:1. They had a competitor who sold 11:1 however they are not longer sell them.
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Re: The

PostAuthor: nanno » Wed Aug 22, 2018 2:18 am

Hellgate wrote:I wonder if he cc'd the heads?

That's interesting as their site doesn't list 11:1's. In the information section they specifically call out not using 11:1. They had a competitor who sold 11:1 however they are not longer sell them.


Then they must have been from that competitor. I am not 100 percent certain where he got them from. Nick and I are sometimes in contact over other channels, but after lots of playing around including running very rich and reducing ignition advance (he's running a C5), there simply was no way of tackling the detonation and heat issues on his engine, without ultimately going back to lower comp or stock pistons. Last time we chatted about the subject there was the idea I weld up a set of heads for him... :cl:
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: Hellgate » Wed Aug 22, 2018 8:19 am

Man, that's terrible. He could use a thicker head gasket.
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Wed Aug 22, 2018 8:53 am

That would only partially solve the issue as the nose is too high, shielding off part of the combustion chamber and thereby adversely affecting flow.

I am pretty sure you could get away with it, if the nose would include a bigger angle between the two surfaces of the nose and thus being less high, whilst still displacing enough volume to bump up the compression.
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Sat Sep 01, 2018 5:14 pm

I needed a bit of a break from my uni-papers today as I had hit a bit of a dead end in my research and I was longing to get away from my desk. (And don't get me started on the concept of weekends... :;: )

So I started making those TM38s work for my new engine and in very short, did anybody notice, that in stock form they don't run air(-correction-)jets? Well I did... I think that's the way forward to get the midrange right. Pictures and a bit more in depth info to follow in about 20hrs, when the blog post goes live and my pictures are available to be linked. Overall jetting these will be interesting as I plan to use an AFR probe to find out how certain modifications affect the AFR-ratio in practice.

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http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Sun Sep 02, 2018 12:10 pm

Shortened the cables, swapped mains for 180 and... oh boy. These actually may flow a tad better than the VM38s I had before. Still need to synchronize the carbs, but didn't have time today as I had to fix my old Volvo's brakes. Not that I'd care, I mean you're a lot faster, if you don't use the brake as much... :;:
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: Hellgate » Sun Sep 02, 2018 7:18 pm

I'm curious to hear what you think once they're dialed in.
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Sun Sep 16, 2018 2:54 am

I'll discuss my findings on the TM38 flatslides in a separate thread from here onwards and keep this strictly to the engine side of things. (As I am sure, there will be a few more things that I am going to do to this engine, yet the carb topic will (as per usual) spiral out of control in other directions...)

All the carb stuff can be found here:

Euro-style TM38-carb setup
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Sat Sep 29, 2018 3:10 am

Interesting (at least for me, maybe for others) engine sidenote: It seems that the straight bit of the wedge I welded up, creates an interesting vortex just above or around the spark plug. Which results in the spark plug clogging up even when using a BP7ES. Now I switched to a BP6ES yesterday and guess what... I ran out of fuel after about 50km. :;: But aside from that now this seems to have cured my spark plug issues.

Other than that, nothing much to report. Goes like stink, rings have bedded in nicely after approx. 1200km and as a result oil-consumption is somewhere near zero now. Oh and my battery died, but that has got nothing to do with the engine, but is the reason, why my old XT had to do the daily-rider chores for the last few days.

Completely unrelated (but we discussed it here before): I bought a new (to me) lathe, a Rhino-Precision, which is a 1960ies Indian made Coronet PLN-5. A tad bigger than my old Matra, but about three or four times the weight. (Judging by the engine hoist's squeaking sounds of agony... :bg: )

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http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: faffi » Sat Sep 29, 2018 4:02 am

Interesting about the plug running cooler. I know unburnt fuel will chill the combustion, but so does quicker burn time, apparently. Nice work :cl:

Unfortunately, my shop is tiny, so I'm looking fof a very small lathe and milling machine 2-1.
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Sat Sep 29, 2018 4:52 am

It might just as well be a combination of both to be honest. It seems to work fine and not do any nasty stuff, so I can live with it for now. Just curious, what's going on...

Well to be fair, the overall dimensions of the new lathe aren't that big. When/Should you come round you'll see it's actually a lot smaller in real life than you'd think. It's just very heavily built. Very.
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

http://greasygreg.blogspot.co.at (My blog - Greasygreg.blogspot.co.at)
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: faffi » Sat Sep 29, 2018 5:04 pm

Well. I'm looking for something that can be placed on a table :bg:

Something like this, but obviously 230 volt https://www.ebay.com/itm/Klutch-Lathe-M ... 2112554728
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Mon Oct 01, 2018 12:21 am

Right, so I ordered a set of TM38-86 (43mm spigot) and some auxiliaries last night and plan to move the welded up heads to a strictly experimental engine. Unless the new carbs reveal that my spark plug issues are down to the carbs, but as they have randomly occurred with the old roundslide VMs I seem to have an issue with the combustion chamber shape and as this is somewhat holding me back in enjoying my TR1, I have to find a solution.

As a substitute, I'll use a set of XV700 heads that I still have sitting on the bench... :;:

Edit: Research of my old(er) documentation reveals: Sparkplug issues have been present since day one basically. So overhauling and porting XV700 heads it is.
http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

http://greasygreg.blogspot.co.at (My blog - Greasygreg.blogspot.co.at)
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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: nanno » Tue Oct 02, 2018 1:50 pm

XV700 heads cleaned, valves lapped, ports smoothed out and new valve stem seals installed. Not bad for about 2.5 hrs.

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http://viragotechforum.com/viewtopic.php?f=12&t=43227 - Nanno's accumulated findings (and blatant show-off) - infos on my TR1's, my performance and reliability mods and a bit of show-casing of the stainless steel exhausts I build

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Re: The "mule" Nanno's new naturally aspirated motor

PostAuthor: faffi » Tue Oct 02, 2018 4:48 pm

A really :GJ:
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