Road King Performance upgrade needed!
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Seasoned HDF Member
Joined: Dec 2012
Posts: 6,667
Likes: 502
From: Orange County
Road King Performance upgrade needed!
2001 RK police (FLHPEI), removed the MM fuel injection, stock CV carb, stock cam.
Dual exhaust, Jackpot Pro Touring 4.5 slipons; 44K miles.
98 Cubic-inch upgrade, 10:1 compression. Daytona Twin-Tec ignition.
It runs pretty good, however, when it's hot out, it will ping going up hills under a load. I tried changing the advance on my Dayton TwinTec ignition (carb), but didn't make much difference.
I would like to put in a cam and maybe new ignition that will give me the best performance off the line. I want to be able to pull away from a stoplight and leave the cars behind. Not too worried about cruise speed, I usually ride single.
Originally was thinking about the S&S 510 cams, but I really want the off-the-line performance.
Thanks!
Dual exhaust, Jackpot Pro Touring 4.5 slipons; 44K miles.
98 Cubic-inch upgrade, 10:1 compression. Daytona Twin-Tec ignition.
It runs pretty good, however, when it's hot out, it will ping going up hills under a load. I tried changing the advance on my Dayton TwinTec ignition (carb), but didn't make much difference.
I would like to put in a cam and maybe new ignition that will give me the best performance off the line. I want to be able to pull away from a stoplight and leave the cars behind. Not too worried about cruise speed, I usually ride single.
Originally was thinking about the S&S 510 cams, but I really want the off-the-line performance.
Thanks!
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
for pull-away power, maybe think about changing the gearing-
exhaust, stock type headers pipes or ?
for pinging- record when it happens
rpm, load ( like up a hill? 3%, 6%) and throttle position.
it could be spark advance, or octane or mixture- it could be you need a slimmer needle in the cv, or a washer to shim the needle up.
nightrider.com has a biketech section with tips on modding and tuning the CV carb- a couple of seats of the pants tests that can help you figure out if your mixtures are lean/rich/good
mike
exhaust, stock type headers pipes or ?
for pinging- record when it happens
rpm, load ( like up a hill? 3%, 6%) and throttle position.
it could be spark advance, or octane or mixture- it could be you need a slimmer needle in the cv, or a washer to shim the needle up.
nightrider.com has a biketech section with tips on modding and tuning the CV carb- a couple of seats of the pants tests that can help you figure out if your mixtures are lean/rich/good
mike
Banned
Joined: Mar 2012
Posts: 11,232
Likes: 16
From: Socialist Republic of the USA
OP, I went with Andrews 57 cams anticipating the S&S 98" I now have going in (already on but bike not finished). The 57 really opened up the power band and anticipating a seat of the pants pull with new top end.
Thread Starter
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Seasoned HDF Member
Joined: Dec 2012
Posts: 6,667
Likes: 502
From: Orange County
for pull-away power, maybe think about changing the gearing-
exhaust, stock type headers pipes or ?
for pinging- record when it happens
rpm, load ( like up a hill? 3%, 6%) and throttle position.
it could be spark advance, or octane or mixture- it could be you need a slimmer needle in the cv, or a washer to shim the needle up.
nightrider.com has a biketech section with tips on modding and tuning the CV carb- a couple of seats of the pants tests that can help you figure out if your mixtures are lean/rich/good
mike
exhaust, stock type headers pipes or ?
for pinging- record when it happens
rpm, load ( like up a hill? 3%, 6%) and throttle position.
it could be spark advance, or octane or mixture- it could be you need a slimmer needle in the cv, or a washer to shim the needle up.
nightrider.com has a biketech section with tips on modding and tuning the CV carb- a couple of seats of the pants tests that can help you figure out if your mixtures are lean/rich/good
mike
I still plan on doing a cam, just not sure which one.
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Joined: Mar 2007
Posts: 54
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2001 RK police (FLHPEI), removed the MM fuel injection, stock CV carb, stock cam.
Dual exhaust, Jackpot Pro Touring 4.5 slipons; 44K miles.
98 Cubic-inch upgrade, 10:1 compression. Daytona Twin-Tec ignition.
It runs pretty good, however, when it's hot out, it will ping going up hills under a load. I tried changing the advance on my Dayton TwinTec ignition (carb), but didn't make much difference.
I would like to put in a cam and maybe new ignition that will give me the best performance off the line. I want to be able to pull away from a stoplight and leave the cars behind. Not too worried about cruise speed, I usually ride single.
Originally was thinking about the S&S 510 cams, but I really want the off-the-line performance.
Thanks!
Dual exhaust, Jackpot Pro Touring 4.5 slipons; 44K miles.
98 Cubic-inch upgrade, 10:1 compression. Daytona Twin-Tec ignition.
It runs pretty good, however, when it's hot out, it will ping going up hills under a load. I tried changing the advance on my Dayton TwinTec ignition (carb), but didn't make much difference.
I would like to put in a cam and maybe new ignition that will give me the best performance off the line. I want to be able to pull away from a stoplight and leave the cars behind. Not too worried about cruise speed, I usually ride single.
Originally was thinking about the S&S 510 cams, but I really want the off-the-line performance.
Thanks!
No wonder it pings on you.
Your Daytona twin tech ignition is a very good ignition. You should keep that.
Do you plan on doing any head work ?
If you do that will open up even more choices for cams.
Mild head work, valve job, and valve springs. Run the andrews 48 cam. That'll give you all the low end torque, performance off the line your looking for.
Thread Starter
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Seasoned HDF Member
Joined: Dec 2012
Posts: 6,667
Likes: 502
From: Orange County
So you went to 98" and 10-1 compression and keep the stock cams and a stock cv carb ?
No wonder it pings on you.
Your Daytona twin tech ignition is a very good ignition. You should keep that.
Do you plan on doing any head work ?
If you do that will open up even more choices for cams.
Mild head work, valve job, and valve springs. Run the andrews 48 cam. That'll give you all the low end torque, performance off the line your looking for.
No wonder it pings on you.
Your Daytona twin tech ignition is a very good ignition. You should keep that.
Do you plan on doing any head work ?
If you do that will open up even more choices for cams.
Mild head work, valve job, and valve springs. Run the andrews 48 cam. That'll give you all the low end torque, performance off the line your looking for.
Thanks rking 1550.
Ultimate HDF Member
Joined: Mar 2012
Posts: 6,129
Likes: 143
From: Santa Cruz
The stock cams and 10-1 is your ping problem. I like andrews 37s more than 510s and ya can't run 48 lift without headwork.
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Correct on the 48 without head work, but that's why I asked if he planned on doing head work and suggested the 48. IF he was doing head work.
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Thread Starter
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Seasoned HDF Member
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From: Orange County
What cam could I run without doing work to the heads? Andrews 37G?
Last edited by Road Star; Nov 9, 2015 at 08:56 PM.
Advanced
Joined: Mar 2007
Posts: 54
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The 37 would work without additional head work.
Who's doing the motor work ? Talk to your builder see what they like.
Also are you sure your compression is 10 to 1 ? How do you know ?