Forum not very active

Frank Hein · Posted: Thu Apr 08, 2010 6:38 pm Post subject: Forum not very active

Too many days without a WF post again.

I'm still waiting for break-in day, probably next week but certainly by 4/24. It occured to me that during those first few laps I'll have a brand new engine, brake pads, tires... and driver. So I guess I'm going to accelerate out of the turns but not down the straight, keep the brake on for two laps until just before they begin to fade, and hang on while the mold release is scrubbed off the new tires.

Does that combination break-in the new driver or are there any other complications to throw at me?
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Frank
Arrow AX9-4S / Briggs World Formula

Paul Hutt · Posted: Thu Apr 08, 2010 6:46 pm Post subject: Re: Forum not very active

Chris Hatch · Joined: 02 Mar 2004 Posts: 405

WHen scrubbing new tires, always approach the first turn slowly as the car won't want to turn and will slide the front end a bit. You don't want to slide new tires. Scrub in new tires at 3/4 speed for a few laps, then let cool. After that, run 'em like you race 'em.

WHen Breaking in and engine, I like to do "pulls". First couple laps accelerate to 5000, slow, back to 5000. Then I like to do a couple of laps to 5800-6000, then a couple laps full on.

Paul Hutt · Posted: Sat Apr 10, 2010 6:41 am Post subject:

Frank,

If you are breaking in a new engine, you probably ought to follow Briggs instructions or somewhat similar procedures to break-in the engine. I had a problem getting the temp up on the no-load run and then when I went out on the sprint track I was not able to get the rpms up as I had been advised by others. Briggs does not give any specific temp & rpm # for break-in procedure. (Never been in a kart before so that was the problem getting rpms up on sprint track.)

Michael Schorn who puts on WF/Animal tech seminars said not to worry about the things I ran into during the break-in. He said the WF is pretty much bullet proof.
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Race Grandpa
Panic Motorsports West

Frank Hein · Posted: Sat Apr 10, 2010 8:58 am Post subject: Forum not very active

Thanks for the responses, Paul and Chris. Keep in mind that I posted this in the "Forum not very active" thread to generate a little traffic. If I were really, really concerned I'd have started a new "WF multiple/conflicting break-in procedures" thread.

That being said, isn't it a little comical that:

1) The driver has never piloted a proper racing kart.

2) New tire scrubbing procedure is: careful not to slide and run 3/4 speed for a few laps.

3) Engine break-in is to "load" the engine for several laps, not exceeding 6000 rpm. Many people recommend "bursts" or "pulls".

4) Arrow brake "bedding-in" procedure: Drive slowly for 2-3 laps dragging the brake until they are extremely hot and are about to fade. Now drive slowly, without touching the brakes, allowing them to cool. After this you can drive at race pace.

It's the brake bedding-in on top of everything else that got me thinking about how I'm going to manage the first few laps. I'm going to have Roger Hargens, a 40 year kart veteran with me for the break-in, first practice and first race day so I'm not really worried. It may make sense to have him run those first few laps. But isn't funny to think of me doing it? I've never even had all my safety gear on all at the same time yet.
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Frank
Arrow AX9-4S / Briggs World Formula

Paul Hutt · Posted: Sat Apr 10, 2010 10:43 am Post subject:

I only rely on info from people like John and Craig. Look at the # of their posts and how often those with a similar # of posts disagree with them.

Good luck in getting WF started in New England.
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Race Grandpa
Panic Motorsports West