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Home-brewing fuel - 10/8/2002 3:47:15 AM   
Ed Smith


 

Posts: 2772
Joined: 12/29/2001
From: Brantford, ON, CANADA
Status: offline 		An engine has to be set up properly for nitro use. If it is not no amount of nitro will improve it's performance. Just as an engine set up for FAI fuel will not run that well on nitro.

Blanket statements like "No nitro means more power" and "No nitro will richen the mixture" are totaly wrong.

Having run 60% nitro in F1 racing engines and No nitro in F3D racing engines I understand the difference.

Ed S

(in reply to volare)
       Post #: 76

Home-brewing fuel - 10/8/2002 4:15:25 AM   
rsieminski



Posts: 1406
Joined: 4/24/2002
From: Sarasota, FL, USA
Status: offline 		Joaquin,
Where can you pick up "Mobil Jet Oil 254".


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       Post #: 77

Home-brewing fuel - 10/8/2002 4:18:13 AM   
Dave Harmon


 

Posts: 105
Joined: 7/23/2002
From: Sperry, OK, USA
Status: offline 		Ed...really....this thread is getting more stupid by the day...

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       Post #: 78

Home-brewing fuel - 10/8/2002 4:25:42 AM   
rsieminski



Posts: 1406
Joined: 4/24/2002
From: Sarasota, FL, USA
Status: offline 		What's that all about?


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       Post #: 79

Home-brewing fuel - 10/8/2002 4:34:26 AM   
Joaquin



Posts: 86
Joined: 5/16/2002
From: Pachuca, MEXICO
Status: offline 		rsieminski;

With a Mobil Oil Distributor, I call Mobil here in Mexico and they give my Local Distributor from which I buy.

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       Post #: 80

Home-brewing fuel - 10/8/2002 4:37:57 AM   
Ed Smith


 

Posts: 2772
Joined: 12/29/2001
From: Brantford, ON, CANADA
Status: offline 		It was written:

>>Ed...really....this thread is getting more stupid by the day...<<

Dave,

By the day? every new post opens up a whole new world.

Ed S

(in reply to volare)
       Post #: 81

Home-brewing fuel - 10/8/2002 5:08:22 AM   
downunder-RCU



Posts: 1125
Joined: 12/27/2001
From: Adelaide, South Australia
Status: offline 		Joaquin:
A while ago I did a very quick and not all that accurate check after changing from my usual 80/20 all castor fuel to 82/18 all Mobil Jet Oil 2 on an SC 1.08 and I found the head temp was up by 10C. I know that a few guys have successfully used Jet Oil down to 6% but I suspect you'd have to be very careful and know what you were doing at that level. I think head temps would be the best way to check for various amounts of oil so long as the engine was always tuned in exactly the same way.
I'd be tempted to go for a straight Jet Oil because even George Aldrich said it was better than castor but while you're experimenting there's no harm in adding a little castor just to find out. On second thoughts, yes, I'd add a little castor because I still think it's a better rust preventative.

(in reply to volare)
       Post #: 82

Home-brewing fuel - 10/9/2002 12:28:20 AM   
winglift


 

Posts: 182
Joined: 8/20/2002
From: Indianapolis, IN, USA
Status: offline 		Capgains

I have not mixed fuel yet but plan to. For what its worth, I have a friend who has been racing cars, including sprint cars, for many years and he said that adding nitro beyond 15% is ineffective.

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       Post #: 83

Home-brewing fuel - 10/9/2002 12:48:24 AM   
Sport_Pilot



Posts: 7260
Joined: 1/21/2002
From: Acworth, GA, USA
Status: online 		I suspect that too much power on a sprint car just causes the tires to spin too much and it just slides off. They spend more time sliding in the turns than anything else. More nitro is more power, but compression has to be lowered drastically to use 100% nitro.

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       Post #: 84

Home-brewing fuel - 10/9/2002 12:58:37 AM   
winglift


 

Posts: 182
Joined: 8/20/2002
From: Indianapolis, IN, USA
Status: offline 		sport_pilot
No offense, but we tested engines on a dyno. Spinning tires has nothing to do with engine performance.

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       Post #: 85

Home-brewing fuel - 10/9/2002 1:09:36 AM   
Sport_Pilot



Posts: 7260
Joined: 1/21/2002
From: Acworth, GA, USA
Status: online 		[QUOTE]Originally posted by winglift
sport_pilot
No offense, but we tested engines on a dyno. Spinning tires has nothing to do with engine performance. [/QUOTE]

Well if you need more power you need to lower the compression before adding the nitro. 15% is about the limit for around 10 to one ratio. AA Dragsters ran 100% nitro till a rule recently limited their nitro to 90%. If what you say is true then they would be running 15% nitro.l

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       Post #: 86

Home-brewing fuel - 10/9/2002 1:49:45 AM   
winglift


 

Posts: 182
Joined: 8/20/2002
From: Indianapolis, IN, USA
Status: offline 		Sport_Pilot

We are talking about mixing nitro with methanol which is used in racing engines. You don't have to believe me and arguing about it serves no useful purpose for this forum. I submitted the information "for what it is worth" which I believe would prove to be valuable to others. Based upon my friend's long experience with racing engines and fuel, and my experience as well, I submitted the information for the benefit of the current discussion.

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       Post #: 87

Home-brewing fuel - 10/9/2002 7:44:46 AM   
Sport_Pilot



Posts: 7260
Joined: 1/21/2002
From: Acworth, GA, USA
Status: online 		Did your friend bother changing the jets with the higher nitro? Nitro requires a much richer mixture than straight methanol. Since you don't want to take the word of several experianced modlers here is a site for your study.

http://www.turbofast.com.au/racefuel.html

(in reply to volare)
       Post #: 88

Home-brewing fuel - 10/12/2002 9:24:05 AM   
rsieminski



Posts: 1406
Joined: 4/24/2002
From: Sarasota, FL, USA
Status: offline 		I did some mods to the spreadsheet, added the option for more additives, and added some calculators for people who mix large volumes of fuel.

Basically, if you put the numbers that you know in the yellow boxes, it will figure out the unknowns in (red). The names of the additives will carry down through the page. The additives can all be changed. Any questions, just ask. Work with it a while, I think it'll be useful.

Here's the new file:
http://www.cwoi.net/spad/HomeBrewNew.zip

3 pages


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       Post #: 89

Home-brewing fuel - 10/12/2002 11:13:57 AM   
Dave Harmon


 

Posts: 105
Joined: 7/23/2002
From: Sperry, OK, USA
Status: offline 		Thanks Rick....works great!
Dave

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Mix Your Own Fuel....It's Easy!

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       Post #: 90

Home-brewing fuel - 1/6/2003 4:38:32 PM   
mchin


 

Posts: 1
Joined: 1/6/2003
From: Philippines
Status: offline 		hey! I just wanna ask is this all you need to brew your own fuel:Mathanol,Nitro and oil (what kind/name/brand of oil are we talking about?)

Whats the acetone for? thanx.

(in reply to volare)
       Post #: 91

Home-brewing fuel - 1/6/2003 5:56:51 PM