Knock and pinging : V-Twin Forum: Harley Davidson Forums

bdeuce · 05-06-2009, 04:27 PM

05 egc knocks an pings on hot days when I hit stop an go traffic.This bike has a ness big sucker wild pigs slip ons jetted carb 48 slow an 195 main . last week coming home from work on a 90 degree day going about 40 mph for 20 miles as soon as I hit stop an go traffic the oil temp went right up to 250 an every time I let the clutch the engine would Knock an ping the bike seemed hotter than nomal this has happend twice on hot days. I am new to the group so hello to everybody from bob

relxn88 · 05-06-2009, 06:37 PM

Quote:

Originally Posted by bdeuce

05 egc knocks an pings on hot days when I hit stop an go traffic.This bike has a ness big sucker wild pigs slip ons jetted carb 48 slow an 195 main . last week coming home from work on a 90 degree day going about 40 mph for 20 miles as soon as I hit stop an go traffic the oil temp went right up to 250 an every time I let the clutch the engine would Knock an ping the bike seemed hotter than nomal this has happend twice on hot days. I am new to the group so hello to everybody from bob

Welcome and I'm just going to give you my personal opinion. I'm assuming your engine is not running lean. I have oil coolers on my bikes(one's a stroker and the other is a stage 4) and they rarely go above 185 on the oil temp. I went cross-country with the stage 4(in august) and the oil ran 215 degrees thru the Mojave desert when the outside temp was 115+.
I'm using Jagg coolers, but I think the Harley coolers are Jagg.
The oil coolers were the fix for me.

road_king · 05-08-2009, 08:06 PM

Are you using Premium high octane fuel?

LoneEagle964 · 05-08-2009, 08:33 PM

you mat want to also check for intake leaks which will cause a lean condition and could be causing your problem.

LoneEagle

relxn88 · 05-08-2009, 11:13 PM

Quote:

Originally Posted by road_king

Are you using Premium high octane fuel?

Yep, 93 octane all the time. loneeagle964 hit upon what I had mentioned, that I assumed you weren't running lean at low rpms, for ANY reason. If your tune is OK, then you either have to cool the outside of the engine(fan?) or the inside of the engine(oil cooler). Just my 2cents.

GB'sFLSTS · 05-08-2009, 11:25 PM

You think a "colder" plug range would help here? Shorter insulator, so heat gets up and out of the plug quicker. Just thinkin'.

relxn88 · 05-09-2009, 08:01 AM

Quote:

Originally Posted by GB'sFLSTS

You think a "colder" plug range would help here? Shorter insulator, so heat gets up and out of the plug quicker. Just thinkin'.

I have efi, so even though I'm running 11/1 compression, I don't run anything but stock plugs due to my ecms knock retard function which uses ion sensing thru the spark plugs and can affect the timing. Just my opinion, but if your absolutely sure that you have NO intake leaks, then I'd go to someone who has a dyno with load control(and knows what they're doing) and have them check your AFR at idle, low, middle, and high rpm. I would make sure that my bike was tuned correctly and not lean and if it still ran hot, put on the oil cooler. It's going to cost some bucks, but you should be able to get rid of your problem.

claydbal · 05-09-2009, 09:13 AM

stock cams and timing are big culprits. BUT, city traffic for 20 miles is a bike killer.

first thing i would do is change routes to keep the motor moving. also, dont lug around, get the motor on the needle and main at times, the acellerator pump is your friend too . but, more cam overlap and better ignition tune will help a bunch.

wanna ride · 05-09-2009, 09:18 AM

Opening can of worms here... synthetic oil will drop the motor temp 10 degrees.

bdeuce · 05-09-2009, 12:22 PM

Quote:

Originally Posted by claydbal

stock cams and timing are big culprits. BUT, city traffic for 20 miles is a bike killer.

first thing i would do is change routes to keep the motor moving. also, dont lug around, get the motor on the needle and main at times, the acellerator pump is your friend too . but, more cam overlap and better ignition tune will help a bunch.

Oil cooler coming monday.Talked to my Indy he said change the needle in the carb but did not say which one.He also said true duels will remove the heat better.But that is $400 I dont have right now.So I will start with the cooler an go from there.What needle would Iuse. Thanks for the replies guys bob

claydbal · 05-09-2009, 05:58 PM

remember, true duals wont cure heat alone. actually they dont cure heat. its the motor and tune.

relxn88 · 05-09-2009, 06:40 PM

Quote:

Originally Posted by claydbal

remember, true duals wont cure heat alone. actually they dont cure heat. its the motor and tune.

bdeuce · 05-10-2009, 09:01 AM

Quote:

Originally Posted by claydbal

remember, true duals wont cure heat alone. actually they dont cure heat. its the motor and tune.

I agree also
So where would I start to tune the motor better I think I need to fatten it up. richer = cooler running.I am already running 48 slow an 195 main jets. Thanks bob

claydbal · 05-10-2009, 10:35 AM

see post #8.

Mtclassic · 05-10-2009, 11:11 AM

Quote:

Originally Posted by bdeuce

I agree also
So where would I start to tune the motor better I think I need to fatten it up. richer = cooler running.I am already running 48 slow an 195 main jets. Thanks bob

make sure you don't have an intake leak anywhere. that is plenty rich for a stage 1 bike.