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Tim,
I currently have a couple of Rotax and Leopards. I switch them on and off the karts I have depending on the track and what I feel like racing that weekend. Variety is the spice of life 😀
The rotax takes a little more work due to the constant change in jetting throughout the day (ie. carb on and off kart and back on again). This is not that difficult but an increased step in the racing day. You will also need equipment for selecting jetting along with the multitude of jets. When the Rotax engine does malfunction, which is inevitable, the parts are more costly.
The Leopard takes little to no work during a race day other than twisting on the screws. But just like the Rotax, the leopard can break just as easily.
It use to be that there were only a handful of places that could service the Rotax unlike a Leopard, but that is no longer a factor.
I wouldn’t be concerned with what wins where. Generally, the best driver(s) are upfront regardless of the motor package. IMI, once expanded/changed, may not be a Rotax dominated track. It just happens to be a track suited for the Rotax currently. At Grand Junction, I can remember watching a Leopard, Rotax, Biland, Sonik with some fantasic drivers fight for the lead. What a great race that was!!
I can setup my Arrow AX-9 Kart for you with either a Leopard or Rotax. Give me a call.
Whatever you decide have fun!!!!!
Tom
Thanks Brad for the clarification.
All I need to do know is figure out which engine to run, leopard or rotax?? unless you have a real fast biland you want me to drive 😀
So since we are on the subject of tech. for this weekends CSC, what is the ruling for the Rotax on carb changes? Can we change change out jetting (ie. pilots, slides, floats, etc…..)?
Thanks,
Tom
I got the same post on ekartingnews.com under TAG.
What does that mean to the carb then? Can we change around the jetting (ie. needles,pilot jets, emulsion tubes, etc….)?
On the note of the airbox, I was totally illegal then. I apologize to all and am glad that my results did not affect the race results whatsoever. Brad was totally correct and I was completely wrong. My bad 😥
Everything has been in the open since last year. The radiator is open, the airbox is open with the restrictions listed in section 2.2 and the jetting is open with restirictions listed in section 2.3. The pdf files are superceded by the TAGUSA rules.
No confusion. No issues.
All we have so far is Brad saying Marty said that the airbox is illegal, while Doug stated that Marty said the airbox and radiator are open. Both persons are equally important with regards to CO racing. What Doug stated last year seemed to be just fine until Sunday when the rules were tested at a club race.
Just so we are all clear here, directly from the TAGUSA website http://www.tagracing.net
These are the rules regarding airboxes and carbs. They are simply numbered differently in the CSC rule book
2.2 AIR BOX – OPEN, but must be CIK or RLV approved air box with two inlet tubes not to exceed 22.0 mm (+/- 1.0 mm) inside diameter and 95.0 mm minimum length. The 2004 CIK homologated KG and Freeline boxes with internal filters are only legal in TAGTM Shifter and TAGTM 4-Stroke classes. All air boxes may not be modified although the rubber flange may be trimmed on the inside of the air box to the flange lip. Aftermarket internal foam air filters are allowed as long as no modification is made to the air box itself. The position of the air box is non-tech.
2.3 CARBURETORS – OEM as supplied from the engine manufacturer, jetting is open. Washers may be added to the stock needle jets for the purpose of tuning, must be the OEM needle jets. The way the throttle cable connects to the arm and the bracket that holds the cable are non-tech, you must not modify the manifold or the carburetor. The arm, throttle shaft and butterfly are OEM with no modifications. The slide assembly is included in jetting but must retain OEM replacement parts. No button head screws in butterfly. Surface finish of venturi and bore must remain as manufactured. Butterfly type: Must be of original manufacture and stock. The Welch plugs are non-tech but must be of the same size and shape that comes in the overhaul kits, the fuel may only pass through stock metering orifices. Any components not specified herein must be stock appearing. Inlet springs are non-tech item. Machine work to the throttle shaft is not allowed. Surface finish of venturi and bore must remain as manufactured. Carburetors must be matched to engine as homologated. All pumper style carburetors are single-pumpers with plastic fuel cap. Fuel adjustment needles must be stock from the needle top to the ”O” ring step. Needles may be modified beyond the ”O” ring step to attach needle extensions. No remote carb adjusters or triggers
Charles’ point is exactly my understanding with regards to the pdf files that simply contain Rotax Max Challenge specs. In otherwords, RMC rules are covered with the pdf file and the TAGUSA rules supercede the pdf files.
How do we get Marty Casey to respond directly to the CSC and have it posted here for all to see?
When I ran this airbox this weekend I showed everyone. It would have been impossible to hide. I made sure it fit in the rules as presented by TAGUSA.
With my Billett Performance Arrow AX-9 setup perfectly, the airbox/engine combo was a non factor. Billet Perfomance Arrow AX-9’s have a significant horsepower advantage without an engine :bow
So here is my big question and quoting the rules below straight from TAGUSA,
10.3.2 Air Box ? (where required due to track requirements) OPEN, but must be CIK or, RLV approved air box with two inlet tubes not to exceed 22.0 mm (+/- 1.0 mm) inside diameter and 95.0 mm minimum length. The 2004 homologated CIK, KG and Freeline boxes are not legal. All air boxes may not be modified although the rubber flange may be trimmed on the inside of the air box to the flange lip. Aftermarket internal foam air filters are allowed as long as no modification is made to the air box itself. The position of the air box is open.
My airbox that I had on was not modified, nor 2004 homologated, 22.0 mm (+/- 1.0mm), CIK approved. What rule was broken?
Also can you send me anything from Marty that states in fact only the rotax airbox can be used in TAG. I do not want to be illegal.
So here is the next question does this apply or are there other special rules out there for the rotax????
10.3.3 Carburetors – OEM as supplied from the engine manufacturer, jetting is open. Washers may be added to the stock needle jets for the purpose of tuning, must be the OEM needle jets. The way the throttle cable connects to the arm and the bracket that holds the cable are non-tech; you must not modify the manifold or the carburetor, and use all the factory fasteners. The arm, throttle shaft and butterfly are OEM with no modifications. The slide assembly is included in jetting but must retain OEM replacement parts. No button head screws in butterfly. Surface finish of venturi and bore must remain as manufactured. Butterfly type: Must be of original manufacture and stock. Fuel may only pass through stock metering orifices. Any means taken to bypass fuel to the engine in any other manner is not allowed. Any components not specified herein must be stock appearing. Inlet springs are non-tech item. Machine work to the throttle shaft is not allowed. Surface finish of venturi and bore must remain as manufactured. Carburetors must be matched to engine as homologated. All pumper style carburetors are single-pumpers with plastic fuel cap. Fuel adjustment needles must be stock from the needle top to the ?O? ring step. Needles may be modified beyond the ?O? ring step to attach needle extensions. No remote carburetor adjusters or triggers.
Don’t want all the rotax guys that change the slides, pilot jets, needles, emulsion tubes, venturi, floats,etc…. to be illegal.
Just a note here, if you look at the two practice sessions on mylaps during the race on Sunday at IMI you will notice similiar times. In the TAG sr practice I had on the KG airbox and in the TAG master practice I had on the rotax spec airbox. My times were only marginally better. No significant advantage.
What a great day Sunday was!!! Never a thought of the market.
I made a rookie mistake. My plug backed out two complete turns but the kart ran good until it came to a silent role on the back straight.
Missed you out there. I hope your Motori gets back into shape. My Rotax goes into Shockwave tomorrow and will be ready for the race CSC race weekend at IMI.
:cheers: here is to the market getting back to normal.
What a fun day! Didn’t even strap on new shoes for the race had some really old ones from GJMS.
My Billett Performance Karting Rotax/Arrow kart was running great but the plug backed out two complete turns and the engine siezed. :money
Bone head mistake on my part!!!!But I was still smiling at the end of the day.
Looking forward to the CSC race at IMI in a couple of weeks.
Bob, the only thing hot on that day was me standing in the infield in a black racing suit. :cheers:
Mike,
You might want to talk to your friends at Countrywide and IndyMac. As I am sure you know Countrywide released a statement to the press late on Thursday stating they still have $50B in liquidity and the chairman of the board for Indymac released a statement the day before.
With that said, what is curious is that Countrywide funds approximately $40B per month and at that rate they will only be doing business for approximately 5 to 6 weeks.
Also, here at WaMu, our option arm performance has a less than 5% default rate which is the best among all products which WaMu portfolios. If a broker decides to sell an option arm to a borrower they better make sure the borrower knows exactly what they are getting, which I am sure you are aware.
Quote from an un-named insider whom I have been doing business with for the last 12 years.” We are in a midst of a mortgage liquidity crisis. This is for ALL mortgage products, not just subprime or alt-a. We are seeing the credit markets now panic, on all mortgage debt, and loans are not moving through the financial systems of the US or world economy.”
Oh boy isn’t all this fun!!! Time to hit the track this weekend. Hope you are out this weekend at IMI. I will be out Saturday and I am going to race on Sunday, as practice for the CSC event.
Tom
