|
|
Post by 190mech on Apr 8, 2010 9:00:38 GMT -5
I think thats a good plan to tune with a mild pipe for breakin..
|
|
|
|
Post by 90GTVert on Apr 10, 2010 20:53:50 GMT -5
I bought a cheap pair of handlebars and an adapter for T1 some time ago along with other swap parts. I was hoping to use the stock stuff, but the speedo jumps around like crazy so I was gonna switch to a Sigma. I was bored and wanted to do something to T1, so I thought I'd do the conversion earlier today. The adapter went on fine, but the cheap handlebars suck. They are too tall so some cables can't reach.  Just out of curiosity, I tried the stock bars from the Venus. I might have to pick a set of these up at some point unless I find something cheaper.  www.partsforchinesescooters.com/asp/gmi/?choice=showCategory&category=101&classid=21 |
|
|
|
Post by 90GTVert on Apr 12, 2010 14:33:31 GMT -5
john has recently brought to my attention that the Polini Sport kit I ported may be destined to fail over and over because of the exhaust port width. It's pretty obvious from the wear/damage that the rings snagged the exhaust port. I think he's probably right. Being a stroker really doesn't help. Stroker motors apply more force on the piston toward the cylinder walls, specifically in the areas of the boost and exhaust ports on this style of engine. hat kind of makes me wonder if this cylinder would be any good on a standard stroke? Probably not because of the extreme exhaust size I would guess? Not really sure. I have seen others make the port just as wide as I made mine and still raise the roof, although they don't seem to open the outlet of the port up so much. John is thinking a 50+mm bore kit designed for this sort of stroke would be the best way to go. Once again, he's probably right. I see that Airsal is making "90cc" kits. If that's really a 52-54mm bore it might have some serious potential. Hopefully the 90cc would be a bridged exhaust port like the 70cc T6. I emailed the site below that carries the Airsal to see if I can get more details. www.reimerminiatvracing.com/engineparts.htmlAt this point, I'm pretty broke, so a major revamp is out for a bit. I looked at the credit card bill and thought "OH $H!T"... that kinda broke. I will get this thing going, it just might take some time. If you see other projects proceeding, I've got a few little projects lined up with parts I already have/ordered.... part of that "OH...." That should give me/us pletny of time to figure out what action should be taken. |
|
|
|
Post by 90GTVert on Apr 12, 2010 14:49:46 GMT -5
I found this info about the Airsal on another site.
"Aluminum Cylinder With Nickel - Silicon Carbide Plating
All Installation Hardware Included
52mm piston with 12mm pin.
Includes machined billet head!
42mm or 45mm Stroke
Single ring only!"
The 42/45mm stroke doesn't appear to be the typical either or kit either. It looks like they offer 2 different kits so it would be setup properly without spacers and such I'd hope.
|
|
|
|
Post by 90GTVert on Apr 12, 2010 15:47:28 GMT -5
I see that Airsal is making "90cc" kits. If that's really a 52-54mm bore it might have some serious potential. Hopefully the 90cc would be a bridged exhaust port like the 70cc T6. I emailed the site below that carries the Airsal to see if I can get more details. www.reimerminiatvracing.com/engineparts.htmlFrom Reimer... "Sorry I do not carry those kits anymore. I would call Mopedhospital.com they bring those kits into the USA." |
|
|
|
Post by 90GTVert on May 6, 2010 6:10:04 GMT -5
|
|
|
|
Post by 190mech on May 6, 2010 9:15:30 GMT -5
Which one have you ordered?
|
|
|
|
Post by 90GTVert on May 6, 2010 11:37:28 GMT -5
lol Right. None of the above. It's all I can do to try and keep the Murdertrain and the SunL i working order right now. I just wanted to share and post the link incase I forget where I saw that stuff. Decent 50mm+ stuff is a lot harder to come by than 70cc kits.
|
|
|
|
Post by 190mech on May 6, 2010 11:52:43 GMT -5
I like the LC idea,gets my thinking wheels turning about a low
buck conversion...
|
|
|
|
Post by 90GTVert on Jan 31, 2011 16:22:44 GMT -5
I found a cylinder that I thought might be an improvement over the typical 54mm BBK, so I ordered it. It's a Hoca kit sold by Parts For Scooters. The reason I believed it to be an improvement, is that I noticed auxiliary exhaust ports in the pictures. That's not something I'm used to seeing in the big minarelli kits. The kit came in today, in a timely manners as always from PFS. The cylinder head is extra beefy on this kit. Heavy and thicker than normal.  It does indeed have two auxiliary ports.   What I wasn't expecting is how narrow they are and how small it makes the main exhaust port. Maybe I'm wrong, but the port looks pretty small compared to the standard 54mm kits I've used before. I'll know more whenever I get around to a better inspection. Here are plenty of pics to show you how the exhaust ports are setup...     It looks like opening this up would be way more challenging than working on a single exhaust port. It would be hard to get anything in from the outlet side of the exhaust (how I normally port) and I don't know how well anything I have would get to the cylinder wall side of the ports. I get that the auxiliary ports will increase the port area, but I was expecting more of an increase in potential for flow. |
|
|
|
Post by lshigham on Jan 31, 2011 16:49:05 GMT -5
Those are some rough looking ports, are they usually that bad?
|
|
|
|
Post by 90GTVert on Jan 31, 2011 17:45:42 GMT -5
Pretty much. Now you see what I was telling you about the widely available kits for these things. lol They won't win any beauty contests, that's for sure.
|
|
|
|
Post by lshigham on Jan 31, 2011 17:57:51 GMT -5
 That's my current cylinder, as it came. Mmmm, nice chamfers :spin: |
|
|
|
Post by 190mech on Jan 31, 2011 18:22:00 GMT -5
I belive that the cylinder stud spacing and the large 54mm bore keeps the aux channel verrry small.If it was much wider you'd be in the stud holes.Ive seen pics of drag cylinders from Japan that had huge aux ports cut right thru the cyl stud area,then a steel sleeve was machine fitted to close the leak..With care,that may make a decent jug,a 90* head for the port tool would be needed...
|
|
|
|
Post by 90GTVert on Jan 31, 2011 22:06:36 GMT -5
I figured the stud spacing has a lot to do with it. but it still disappoints the hell out of me.
|
|
