MVVS .49 or Rossi .45 or Irvine .53 or Webra .50  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> MVVS .49 or Rossi .45 or Irvine .53 or Webra .50
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MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 7/30/2003 6:52:15 PM   
bgi



Posts: 907
Joined: 2/19/2002
From: Duluth, GA, USA
Status: offline 		FWIW The Webra 50 GT works GREAT on the Knife ARF. I put one on mine after getting mixed results from the TT 46 Pro and Saito 72.

With the Webra 50 GT. it hovers at about 1/4 throttle with 12.25x3.75 APC and has great throttle response. The saito had enough power, just shook too much and had too much torque.

Haven't seen the MVVS or YS or Rossi run on a Knife.

< Message edited by bgi -- Jul 30 2003 6:04PM >

(in reply to davidl340)
       Post #: 26

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 7/30/2003 10:06:19 PM   
davidl340


 

Posts: 30
Joined: 2/6/2002
From: Gulfport, MS, USA
Status: offline 		Called every local hobby shop. Closest one that stocks 5% is 77 miles away.

Only problem getting fuel mail order is the $20 hazardous shipping fee they charge. And you need to buy it in 4 gallon increments. I don't know of anybody that runs FAI or 5% in my club or even in this area, so splitting it up would be a pain.

If the MVVS .49 is worth it, I don't have a problem driving 77 miles one way to get some fuel every 6 months or so for fuel. One good thing about the 5%, it is more affordable.

Everyone around here stocks the 15% Omega and Cool Power fuels. Nitro is just the norm around here. Thank goodness for HobbyTown USA in Mobile, AL stocking 5%.

(in reply to davidl340)
       Post #: 27

MVVS Fuel - 7/30/2003 11:33:27 PM   
ewspears


 

Posts: 242
Joined: 9/22/2002
From: Ocala, FL, USA
Status: offline 		David,
You should do whatever you want, but I'm sure if you told Robert at Morris you wanted to run 15% he'd supply you a head shim to accomodate it. You would then have more power, probably better throttle response, (Glow Plug stays hotter at low power settings) and most importantly you'd be using the same fuel as your friends.

Don't let people tell you it will make just as much power with 5%
[SIZE=3] NOT SO![/SIZE]

Don't let people tell you you'll ruin your engine. That's NOT SO either. The only way you'll damage it is if you take a MVVS or Rossi that is set up for 0-5% and dump 15-20% in it and then ignore; the detonation sound, the factyou can't seem to get it rich enough, and It's overheating.

One things for sure;
[SIZE=3] I wouldn't drive 77 miles one way to get a fuel that produced less power and was different than my friends were using![/SIZE]


_____________________________

Esten W Spears
Ocala, FL

(in reply to davidl340)
       Post #: 28

Nitro and MVVS - 7/30/2003 11:49:54 PM   
DarZeelon



Posts: 7343
Joined: 4/9/2003
From: Rosh-Ha'Ayin, ISRAEL
Status: offline 		David,

EW is right.
If your engine is set up to run 15% nitro, with the extra head gasket, it will make more power than the engine in stock form, will make on 5% nitro.

The difference will only be 150-200 RPM, however.
The difference will be larger if you try to use 5% nitro in the engine set up to run 15% nitro.

Reponse is more of a setup issue and I do not believe you will see any difference between the two engines. The higher compression and the catalytic reaction of the methanol, will keep the plug's platinum element pretty hot in the stock engine.

The MVVS in stock form can idle at 1,850 RPM, all day long on 5% fuel.

If you try to run the decompressed nitro engine, on 5% fuel, idle and response will be adversely affected.

Despite the fact that over 75% of MVVS production goes to the USA, they do not set the engines up to run higher nitro.
This tell me what they think.

I think Mr. Spears should also take this at face value.

< Message edited by DarZeelon -- Jul 31 2003 9:18AM >

_____________________________

Dar Zeelon - ISRAEL - ddzeelon@gmail.com
MVVS - Jett - Nelson - Bolly - Mejzlik

(in reply to davidl340)
       Post #: 29

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 7/31/2003 12:58:16 AM   
davidl340


 

Posts: 30
Joined: 2/6/2002
From: Gulfport, MS, USA
Status: offline 		Hmm been doing some thinking.

1 gallon of 15% at local hobby shop $18.95 (what a rip off)

4 gallons of 5% (lowest nitro I can find) $37.99 (9.50 gallon) or 12.99 a gallon purchased 1 at a time.

Quite a difference there.

This low nitro thing is looking better to me. I've been wanting to see that new hobby shop 77 miles away for a while now, now I may have a good excuse. I wonder how crappy my O.S. 46 fx would run with 5% ;-). I like being a little different at the club anyway (You should have seen everyone's face when I showed up with a Morris the Knife!)

If the shelf life on fuel is at least a year or two, it may be smart to run the 5% and drive to buy a 4 gallon case.

Top end power has never been my thing. I like reliable mid and low range flying more than anything.

(in reply to davidl340)
       Post #: 30

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 7/31/2003 1:31:29 AM   
maxtenet



Posts: 708
Joined: 10/18/2002
From: Towson, MD, USA
Status: offline 		How about $2.50 a gallon for methanol, $5.00 a quart for castor and $7.00 for Klotz synthetic and mix your own to your specs. Much more fun!

http://www.dryslick.com/html/racing_fuel_sales.htm

Max

P.S. Darzeelon is right on about the difference in shims and nitro!

(in reply to davidl340)
       Post #: 31

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 7/31/2003 7:51:00 PM   
davidl340


 

Posts: 30
Joined: 2/6/2002
From: Gulfport, MS, USA
Status: offline 		This is off subject, but that sounds interesting. At least a fun experiment (to try on some of my older motors, assuming they'd run on FAI) I've smelled the scented Alcohol in the race cars at the drag strip. Do you think you could scent the fuels for these little engines? Would be a definate conversation starter.

I may have to see if they sell pure Methanol where you get fuel for drag race cars around here. Sounds like fun, I doubt it's worth the trouble for saving money alone though.

(in reply to davidl340)
       Post #: 32

Fuel mixing - 7/31/2003 8:39:11 PM   
DarZeelon



Posts: 7343
Joined: 4/9/2003
From: Rosh-Ha'Ayin, ISRAEL
Status: offline 		David,

Most commercial fuels are said to contain some, or all of the following, in addition to the methanol, Castor and synthetic oils and nitromethane:
1) Corrosion protection agents
2) Anti-foaming agents
3) Extreme pressure lubricants
4) Igniter agents (propylene oxide)

From my own experience, most of my engines ran better on commercial fuels, than on home mixed fuels. Maybe it was because my home brew didn't include the extra ingredients.

I now only use commercial fuels and add BeNOL to them, for 20% total oil and extra Castor protection.

_____________________________

Dar Zeelon - ISRAEL - ddzeelon@gmail.com
MVVS - Jett - Nelson - Bolly - Mejzlik

(in reply to davidl340)
       Post #: 33

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 8/1/2003 4:28:52 PM   
Woody 51



Posts: 1159
Joined: 6/21/2003
From: GeelongVictoria, AUSTRALIA
Status: offline 		I mix my own 5% volume Nitro fuel. Have done so now for about 5 years.

Mix is:

3.8 litres Methanol
1 litre Coolpower Oil
200 mls Nitro

I run a mix of Super Tigres, Fox and MVVS engines on this "brew" and have not had any problems.

The only rule I have in mixing fuel is I do it on a day when the relative humidity is LOW.

Cost is about 1/2 of what premixed fuel is.

The containers are dedicated to model fuel only and are stored OFF concrete flooring.

(in reply to davidl340)
       Post #: 34

77 miles - 8/1/2003 4:48:49 PM   
Hobbsy



Posts: 10938
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		77 miles is nothing, I drive 361 miles to my local hobby shop, and I just order my 5% fuel directly from Fox. No biggy.

_____________________________

"I have gone faster backwards, upside down and on fire than most people have gone at all" Don Garlits

(in reply to davidl340)
       Post #: 35

What Hobby Shop ? - 8/1/2003 5:15:05 PM   
FrancisPerson


 

Posts: 689
Joined: 12/14/2001
From: Germantown, MD, USA
Status: offline 		Hobbsy,

What Hobby shop is 350+ miles away??? And what does it have that Dougs in Waldorf, MD does not have?

Oily in Germantown

Francis Person

(in reply to davidl340)
       Post #: 36

Hobby shop - 8/1/2003 5:28:21 PM   
Hobbsy



Posts: 10938
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Francis, it is in south western Va. in Tazewell, he normally has about 200 engines and 350 plus kits and ARFs, he and his wife and the folks who work for him are long time friends of mine. He also has a hobby shop in Princeton, W. Va. They are called Apex Hobbies and Apex Hobbies II. Great folks. All the hobby shops around here put together don't have as much stuff as they do.

_____________________________

"I have gone faster backwards, upside down and on fire than most people have gone at all" Don Garlits

(in reply to davidl340)
       Post #: 37

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 8/1/2003 6:16:33 PM   
davidl340


 

Posts: 30
Joined: 2/6/2002
From: Gulfport, MS, USA
Status: offline 		Reminds me of my local shop. Has about 3 engines, 15 kits, all overpriced, even for a local hobby shop. Good for getting fuel and those small parts not worth ordering. Normally will make a 45 minute drive to a much better one to get something that I don't want to get mail order.

Well, I'm still leaning towards MVVS .49, with the Irvine .53 coming in a close 2nd.

Only down falls the locals have told me about is how once, they had a MVVS that was very hard to tune, they couldn't find a glow plug that would work in it, I told them that they needed to be run with low Nitro fuel, and they had no idea. Also said parts were hard to get. But I bet I know someone who can help me out with that. They kept bragging on the Irvine saying its quality was superior. I'm still leaning towards the MVVS

(in reply to davidl340)
       Post #: 38

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 8/1/2003 6:33:13 PM   
maxtenet



Posts: 708
Joined: 10/18/2002
From: Towson, MD, USA
Status: offline 		Look at the posts here. Everyone has a story about some friend that had a ________ (fill in the blank) engine and had a problem. Most of the time it's due to operator incompetence. MVVS are pretty much trouble free.

Max

(in reply to davidl340)
       Post #: 39

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 8/1/2003 8:26:13 PM   
f2racer



Posts: 1167
Joined: 12/7/2001
From: Bedford, MA, USA
Status: offline 		Every MVVS engine that I've got (40, 49, 91 glow / 2.15 gas) has been simple to tune and break in.

(in reply to davidl340)
       Post #: 40

MVVS .49 or Rossi .45 or Irvine .53 or Webra .50 - 8/2/2003 7:02:40 AM