fuel

[cryer]

I am sure you guys are getting tired of all my newbie questions ,but I have another

what fuel you guys run?

thanks josh

[djracing]

I just ran 93 octane from BP stations here does not contain ethanol and never had a fuel related issue. I've heard a of a few guys mix race fuel and pump gas too..

[IraceLegends77]

100LL from the airport. Good stuff and legal too.
Kind of spendie though.
Scott

[Gimpster]

 Run enough octane so after a feature night you get comments about the header glow visable from the grandstands !
haha, cheap lightweight gauge that you don't have to mount in the chassis....



----- Gimp -----

[NJRacer510]

We use VPMS98L, it is a very good fuel and keeps the engine clean. It is a little pricey though so it depends on how much you would like to spend. We purchase it in a 55 gallon container to save a few dollars. When the dirt nationals were at Big Diamond that was the spec fuel. Some people run track fuel which can sometimes be higher in octane but that doesnt always mean better. The best thing you could do in my opinion is find a fuel that you like and stick with it. It doesnt matter if its VP or Pump gas but its best to use the same fuel each time.

[Gimpster]

 Best tip so far... "Run one fuel and stick with it"
OK, don't laugh... I run pump gas. My thought on topic is that it is so easy to break the BFG's loose on dirt. Carb, cam and ignition timing vary for what fuel you run. There are so many combos available out there, so what one feller does may vary to what effect you gain while trying to duplicate them. Also as of late, try avoid the pump gas that has been eating float solder from lawn mower engines.... cheap chit, man
 My problem is still programmed into my mellon.  In the early 70's racing dirt bikes my dad drilled it into my mind not to tell the competition what you are doing. LOL
 If your double walled factory exhaust header is glowing, you have something way the heck off !

----- Gimpster -----


 

[justfreaky]

 Here is an old thread about fuel.
http://www.legendsracer.com/index.php?topic=5.0

Remember... Some of the races, and or tracks, require you to use a specific fuel from a specific gas station. Just something to keep in mind.

For the most part, pump gas with the highest octane rating (about 98) should be fine.

Steve

[llbuckshotll]

Best tip so far... "Run one fuel and stick with it"
OK, don't laugh... I run pump gas. My thought on topic is that it is so easy to break the BFG's loose on dirt. Carb, cam and ignition timing vary for what fuel you run. There are so many combos available out there, so what one feller does may vary to what effect you gain while trying to duplicate them. Also as of late, try avoid the pump gas that has been eating float solder from lawn mower engines.... cheap chit, man
 My problem is still programmed into my mellon.  In the early 70's racing dirt bikes my dad drilled it into my mind not to tell the competition what you are doing. LOL
If your double walled factory exhaust header is glowing, you have something way the heck off !

----- Gimpster -----


 

So you're saying that 3 out of 4 glowing exhaust pipes is not good? Well help me out? Where should I look? Cause these things are cherry red lol.

New ngk JR9C Plugs
Half 93, half 114. May be my on the heavy side of race fuel. (Probably my problem)
Some exhaust popping at and after about 5k rpms.

Please help if possible.
Feel free to comment on anything else wrong in the picture lol

See picture below:
http://www.bksmotorsports.com/pictures

[VMS Motorsports]

Something isn't right.
I run a 50/50 mix of 93 pump and 112 race gas with an upper engine lubricant.
What do your spark plugs look like?
How's the carb jetted?
Do you have your timing advanced?
Slotted cam gears?

"Need more input"
                                        -Johnny 5

[llbuckshotll]

Something isn't right.
I run a 50/50 mix of 93 pump and 112 race gas with an upper engine lubricant.
What do your spark plugs look like?
How's the carb jetted?
Do you have your timing advanced?
Slotted cam gears?

"Need more input"
                                        -Johnny 5

Plugs are brand new.
I believe the carbs were rebuilt by Hank Scott, don't really know anything about them.
Not sure about the gears or the timing. How can I check?

[justfreaky]

I'm inclined to think that you have timing and fuel issues that are heating things up so much.
Pull the spark plugs and see what color they are. Ultimately looking for a nice tan color around the insulators.
Should not be popping when on the gas. You may get some when you back off if there is some raw fuel getting dumped into the header.
Timing could be too far advanced and/ or jets too large.

To check for slotted cam gears you will need to pull the valve cover to see.

Steve

[VMS Motorsports]

What he ^ said.
Also check the ignition timing by just pulling the cover.

[llbuckshotll]

Ok. So what r we thinking. Open up valve cover, check for adjustable cam gears. If there back off the timing some?

Could it be a Carb problem? As in to rich or lean?

Opening day is tomorrow. Car has to be done and loaded tonight

Thanks for all the help guys.

[llbuckshotll]

What are the specs for timing. How do I check it. Sorry about the lack of searching but I'm at work with only a cell phone lol

[VMS Motorsports]

Check the ignition pick up to see if it is advanced or not.
Check the cam gears to see if they are slotted and advanced or retarded or not.
Check the color of the spark plugs.

Probably running rich.

If all else fails, run straight 93 in it tomorrow.