|
engines
May 12, 2007 8:06:40 GMT -5
Post by trevortennant on May 12, 2007 8:06:40 GMT -5
:DI am setting up an engine information thread. What is the best engine? At the moment we are getting great results with a Sirio.21. We are going to run a Picco Evo 2 7 port shortly.
|
|
|
engines
May 29, 2007 7:28:34 GMT -5
Post by Rocket R/C on May 29, 2007 7:28:34 GMT -5
I am really curious as to why so many people are still running the OPS side exhaust motors? I know Jody and Simon have alot of success with them as do other guys, but when bits run out.... then what? Again just curious.
Which Sirio are you running Trev?
How is the Picco running after break in?
|
|
|
Post by trevortennant on Jun 2, 2007 6:08:41 GMT -5
The OPS is the easy option that is living on borrowed time. Yest they can go well but I prefer less repairing when the crankcase falls apart. At the moment the Sirio S3 is an excellent engine. The Picco P7 evo i still not run in weather in the last week as been useless will find out more at Euro practice
|
|
|
engines
Jun 5, 2007 14:45:00 GMT -5
Post by Rocket R/C on Jun 5, 2007 14:45:00 GMT -5
How did that Picco go at the Euros Trev?
|
|
|
engines
Jul 29, 2007 16:56:22 GMT -5
Post by streetscreamer on Jul 29, 2007 16:56:22 GMT -5
in the 80's I started with the good old VECO.19, which produced a scary 0,25 hp! After that soon the more muscular Picco Buggy came along. My comeptition time then was with the OPS rear exhaust type, Competition PRO. A smooth engine with enough power. After study / money / location interuption I came back on '05 with RB C5 buggy engine.. awesome power, however very hard to handle. So now back to my good old OPS. First start with side exhaust, but due to very strict exhaust restrictions in Holland the engine only loved to run in high revs. Now I keep this joy with cantype exhasut for the wemsa races. From next week my new OPS rear exhaust will be started up with reso pipe for NSO races. I hope it will fit, as it is equipped with the boost can in the rear, I produced already an exentric engine mount for it.
|
|
|
engines
Jul 30, 2007 11:09:36 GMT -5
Post by Rocket R/C on Jul 30, 2007 11:09:36 GMT -5
Ive never heard of a veco! I just looked it up and there are a few for sale.... old stuff wow...and cranking speed at 1/4 horse! Id love to see that thing up close.... good vintage stuff!
Thats funny I just picked up a C5 but havent run it yet. I had an S7 at the worlds last year, which went well, but I could never get it all down to the pavement, I never did get it handling right. I have just broke in an STS 3 port that seems like it could go good, but it sounds like the C5 needs to come out. I will see what I have for time before I come over, and if I have enough time to break it in.
What is a boost can?
|
|
|
engines
Jul 30, 2007 17:10:01 GMT -5
Post by streetscreamer on Jul 30, 2007 17:10:01 GMT -5
The Veco 19 is a very old design engine, american made. It comes with 1 intake port, 1 exhaust port and doesn't use the "Schnuerle" type of flow in the engine, but a barrier (comb) on the piston. See photo below In the very early years these were the only engines you were allowed to use for competition with stockcars in Holland, but I think it was the same story in UK. Below you see a photo of the Veco 19 Car version, equipped with Perry carburettor (still made by the Conley guys). If you look well in the exhaust, you see four ports: it must be the "illegal" upgrade by McCoy. The original iron sleeve of the Veco worn out very fast, and the McCoy systems were able to produce a little more hp and lifetime. The C5 is just a brutal hammer!! In that way it was hard for me to get a fluent driving line. Suddenly all power is in... and it is a real big drinker. Compared with the Collari XS400 like Maikel Rutten and Sander Poels race: they almost have half tank left after the heat!! Boost can is a small chamber connected by a hose to the "dead" room between the carburettor and the intake window of the crankshaft. It "seems" to help for extra torque in lower revs and makes the engine less critical on adjustment in lower revs. (at least that is what I experienced with the same system on a Topstox engine of 26cc) Various engine manufacturers used this system (OPS, Picco, Force and some Taiwanese derivates) however nowadays hardly any uses it anymore, most probably as it doesn't give so much advantage versus the disadvantages of of spare it takes to build in. I guess in my chassis I have to mount a normal backplate and mount the boost chamber separately, or just blind the nipple. Here you see the system on my latest OPS family member. I also found this system on the older 12 mm crankshaft engines called a "5 port torque version"
|
|
|
engines
Jul 31, 2007 11:19:18 GMT -5
Post by Rocket R/C on Jul 31, 2007 11:19:18 GMT -5
Great pics!!! Ive seen that "boost can" before, but didnt know what it was called, and couldnt fit it in a chassis anyway, so never worried about it. That Veco is really cool! Thank you for putting that stuff on here.
As far as the C5, I may hold off on that engine until next season. Its sure to be a screamer from what you say, but I dont know if I will have enough time to give it a proper break in before I come over. Also I would restrict the carb a bit to maybe 7mm to help with fuel consumption. Especially if it has gobs of power, it could smooth it out a tic too. I might have to stick with this STS for the Worlds because I have 2 of them, and will be ok if I have a problem with one. I also have one of the american versions of the XS400, which is the Werks Racing B3. Its new in the box and I have not even thought of running it yet, that will be next year also.
Dont ask me why I have all these motors, I guess I just collect them. If I were to make a list it would be pretty long. I like to experiment, and also cant pass up a good deal either!
It looks like you have a good collection yourself.... some great stuff. That OPS seems the best all around stock car engine. I find 5 ports is about max for good low end punch. I have tried 7 ports, and the power usually comes on a little later and really hard.... not really when you want it. It can go from smooth to sideways really quickly!
Great stuff!
|
|
|
engines
Jul 31, 2007 15:35:54 GMT -5
Post by streetscreamer on Jul 31, 2007 15:35:54 GMT -5
Collecting is a sickness, I know....
Lately I sold two of my dear OPS (Mondial) SE types to other enthousiastic racers in Holland.. However the clan is still large:
RB C5 Collari XS400 OS MAX RG OPS Competition PRO OPS Competion PRO Corsa 93 OPS Competition std OPS Competition 5 port torque Mondial Serpent Competition OPS SE 5x Monza Sport OPS Speed Red Head 7 port OPS Buggy Gold Head 7 port torque Loads of OPS spares
Some of them are brandnew, others are good runners and some are under restoration.
|
|
|
Post by Rocket R/C on Aug 2, 2007 8:49:37 GMT -5
Im scared to list mine.... but then let me see if I can....
1 RB S3 1 RB S5 1 RB S7 1 RB C5 1 Mega 21 Serpent Engine 1 OPS Side Exhaust 1 Older OPS Rear Exhaust 1 OPS Buggy Power 1 OPS Blue Head (I have no idea what this is, other than a 10 port) 2 Picco P5's 1 Picco P3 1 Picco P7 1 OS VG 1 STS 5 port 2 STS 3 port 2 Werks B3 (same as 4 port XS400 Collari) 1 Werks B7 Pro (Silly Fast) And I have one Russian Engine that the name eludes me right now.... needs a piston and sleeve, or a good pinch.
Most of these are more recent purchases due to my engine mount research. Other than RB, most manufacturers will not give freely the engine dimensions, so I have to buy them to measure them. Pity I end up with so many engines. I keep looking for a JP, Sirio, and a Nova Rossi/Top/Rex to add to my collection, more to get measurements off of than anything else. I might run them in a test chassis to see how they go. Ive been fooling with the S5 and S7, and the STS engines.... which I am impressed with for the money. Ive done some internal mods to one of the STS 21 that is in my car now, just crank and sleeve mods, and it has more than I need to get it off the corner.... and it dosent come on like my S7 or other high port motors that need a little rpm then kick in.... this is instantly there.
Anyway keep the collection growing.... you can never have too many engines!!
|
|
|
engines
Aug 11, 2007 19:09:41 GMT -5
Post by trevortennant on Aug 11, 2007 19:09:41 GMT -5
When RC cars started the Veco engine was popular mainly because it was easily available. They were poor engines that were quite weak and needed a lot of messing fitting Mccoy bits to stay together. The first decent engine would be the Super tigre and the oS max. they were all put in the dark by the OPS designed by Mr Picco After He fell out with the rest of the OPS management He left to form Picco engines. The current range of picco engines are great low cost phyiscally strong and inexpensive. I would soon suck cow crap than run SE OPS anymore Hell its 2007 not 1977
|
|
|
engines
Aug 16, 2007 10:24:06 GMT -5
Post by Rocket R/C on Aug 16, 2007 10:24:06 GMT -5
Suck Cow Crap???
Is that what they ran for fuel back in the days of the Veco?
OPS new engines are not bad. They are really big into marine applications, which are available over here, but there are too many other great engines for OPS to be strong in the market. The Japanese and Chinese are starting to make some great power plants, and you get alot more for your money with them. This will be my first trip over using a Japanese engine, but it seems to go very well.
I dont know how long alot of these guys can keep running these side exhaust OPS engines, but there is no argument that they work well. I suppose with piles of nitro anything will go. Eventually they will run out of parts, and have to switch to rear exhaust.... but for some reason I keep seeing them show up, or people keep finding them in their closet with piles of dust.... they may never die!
Picco makes a great engine, Ive always liked them.... they always run strong. Its fun experimenting with different engines.... some really surprise you.... and others fall on their face... but you dont know until you try them, play with clutches, and work with them a bit to know what they can really do.
I guess Trev wont be running OPS any time soon.... he is never outspoken!
|
|
|
engines
Oct 9, 2007 19:16:11 GMT -5
Post by trevortennant on Oct 9, 2007 19:16:11 GMT -5
I find it really odd that great as the Russians are at building engines the car market seems a mystery to them. The first MDS engine were knock offs of the OPS and were very poor having zero power. I had a Kanouguk engine that was beautifully made but performed very poorly. I well remember the De Ridder engine my sample was terrible to say the least having no power and piston liner life of less than an hour. THe USE engine must be best part of 20 years old and need some serious updating to attract any serious interest. Holding the carb in with two grub screws is a big no no. With engines such as GO and STS at such low prices with great performance any engine has to be worth using for its merits. Interestingly the Bike lads are using 4 stroke engines with great success. i tried to use the British rotary cylinder 10cc engine but it was hopeless it simply would not throttle as well as having no power. A simple belt driven DOHC 8cc engine built or car use might work. Heck if what hear about California banning two strokes something has to turn up. I would try an OS Max wankel engine but they are expensive and not that powerful
|
|
|
engines
Dec 8, 2008 12:40:24 GMT -5
Post by pexton on Dec 8, 2008 12:40:24 GMT -5
re-engines Hi Guys i am fed up with OPS carbs the slightest knock and you are stuck on full throttle. i have purchased the new revised OPS carb with the barrel split so the stop screw on the slider is at the rear of the inner barrel, but alas the barrel breaks and same problem. is there another carb to fit the OPS PRO side exhaust? 9.0mm venturi and 12.00mm spigot for the crankcase. you're views appreciated. Pete 395
|
|
|
engines
Dec 11, 2008 16:48:12 GMT -5
Post by grotty67 on Dec 11, 2008 16:48:12 GMT -5
Hi Pete, the problem is easily solved, you need to either slot the carb barrel or modify the tick over screw, pd or simon will do this for you, if you have a lathe you just break off the shank and drill the screw out and repalce the shank with piano wire. The ops side exhaust is now back in production at ops due to demand, and it is there best selling engine at present!, as for being stuck in 1977 why change something that works, if you take a look at the chassis design, that too has changed very little!
|
|