Nothing like coming home from work to see a package from WERKS at the patio door.

Thanks Ron!!! And perfect timing for this w/e when the B5's invade the home nest of the JS's.......

Just sent my new B5 on a weeks vacation to..... OOOOOOOOOOOOOOOOHHHH CANADA!!!!! lol:

you go, MARSHON...show them BARN guys how it's done.......i'll see ya for round #2 at the barn on the 29th...........swapped the screamin 2009 B5 for a 2010 B5.....broke in and running just as good as the 2009.......them there JS's dont stand a chance................alex.

quick question for everyone.
I have the engine broke in finally, and was messing with getting a base race tune today before the heavens opened up and downpoured on me.
I have it set to ~.5 idle gap, and set my idle with the lsn, got it to a good steady idle then did the hsn got it to where I liked it, with lots of smoke and temped at 230ish I liked the top end and the low end too. now when I do a fast lap then bring it in to check idle and what not it comes in at a high idle and stays there for say 5-10 seconds then drops to a low idle and if I dont give it any gas it will die. What should I adjust now? If I lean out the lsn the idle will be too high and it will high rev when I bring it i n, if I richen it up it drops the idle too low. Do I have my gap too small? IE..tuning window too narrow?
thanks in advance.
btw running a 2013 pipe and os p3 plug, byrons 30% and running at 6000ft altitude.

would richen lsn,then bump up idle. your very close but lsn to lean with small idle gap.

I'm no expert but if you read the tuning stickies it sounds like you are doing one of the common mistakes having the idle open too far and compensating by a too rich LSN. Try leaning the LSN until the idle stays too high, then cut back the idle opening to bring it back into balance.

Agreed. Lean the bottom until it's steady (but high of course) and then back down the idle screw.

:lol::lol::lol: see you sunday.

I have a similar question. After I run it hard for a few laps and bring it back it idles for 7-10 seconds before it drops, but mine wont die on me. I had it idle for a minute and it didnt die and when I punched the throttle it bogged quite a bit but I like being on the rich side. Anyways besides being a tad rich, is 7-10 seconds normal or do I want it more around the 15 second range before it drops?

I ask because I already toasted my first B5.... I wanna get atleast 7-8 gallons out of this one :lol:

For those first 7-10 seconds, is it idling really high or just a tad higher than normal? If it's really high, back down the idle to a good point. If it loads up and stalls too quick, just lean the bottom until it's good. If it's just a tad high, your really close. Just lean the bottom a hair more, run it hard, bring it in and adjust the idle to suit.

Ok thanks. How high is too high? I think it sounds pretty normal when it idles for the 7-10 seconds. So if it does start idling higher, do I richen it? U said lean it but won't leaning it make I'd idle hogher

Closing in on 7 gallons and my B5 is still going strong. I ran two qualifiers and a 20m main in a variety of conditions without any issues. The day started out HOT (>95) with near 100% humdity. By the time my main came around it was raining and the temps had dropped noticably. Carrying a lot of additional weight (in muddy clay), I still had enough power to turn in 15 laps better than my previous personal best. Three of them were 2 full seconds faster!

I'm still waiting for this thing to die so I can get a B6.

Really high is so high that it would rip your skin off if you tried to turn it off by touching the flywheel.

From the sounds of things, you are about right. Try leaning the bottom just a bit so it stays up about 15 seconds or more. If the idle is too high after that, just back out the idle screw a bit (it wont take much).

Yes leaning the bottom usually makes it idle higher but you usually need to lean it because the problem is caused by a too rich bottom combined with a too high idle setting. You lean the bottom until the idle is high but steady and then back off the idle screw to bring the idle down.

Usually if the idle is too high because of a lean bottom, you will also have a lean bog when you punch the throttle. If it has no lean bog, you have the opposite situation I mentioned above.

The reason bottom end tuning and idle issues can be so confusing sometimes is that it is all about the balance between BOTH the LSN AND the idle screw. Both have to be right and both affect the other one. Once you get an ear for it though, it's pretty easy to diagnose.

Ok thanks for the great info!

My idle gap may be a little larger than .5 mm. I'm scared to drop the idle screw too far and having too lean low end. Is there any symptoms of having too small idle gap (say about .3mm) with too lean low end?

Can somebody post a picture of the carb so I can get an idea of what .5mm looks like in the carb? Here's a pic of mine, it looks larger than 1mm to me but I'd like to hear what you guys think

You will usually get a lean hesitation if you go WAY to far. When you nail the trigger it will hesitate and sound like it is running out of fuel.

Go too small on the idle gap and it wont stay running no matter how much you lean the bottom.

Like I said, you sound like you are real close so it wont take much to get it spot on. If you find yourself making big adjustments, stop and back-up to where you were before you get lost.