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[HDGearHead]

I just did a compression test on my 110 before starting a CAM change and found the following:

Engine Cold
ACR Disabled
     Front 215-216
     Rear 210-211

ACR Enabled
     Front 117-118   
     Rear 139-141

Engine Warm
ACR Disabled
     Front 222-223
     Rear 216-218

ACR Enabled
     Front 120-123
     Rear 142-145

What would cause such a large difference between the front and rear with the ACR enabled (they're close with the ACR disabled)?

The compression numbers are also higher than I thought they would be (thought they would be around 205).  The motor has a TMAN CVO Street Performer Kit with TR-555 cams installed.  The build sheet show a 10.7:1 static.

I was planning to swap out the TR-555 with a TR-590.  The 590 centerline and duration is 2 degrees greater than the 555 which should reduce the compression some. 

Should I be looking at a cam other then the TR-590?

[Steve Cole]

Looks like the one compression release is not flowing as well as the other. Not sure there is much you can do about it other than put a new one in. Could be one has some carbon build up in it slightly blocking the exit passage way.

[HDGearHead]

Looks like the one compression release is not flowing as well as the other. Not sure there is much you can do about it other than put a new one in. Could be one has some carbon build up in it slightly blocking the exit passage way.

Thanks Steve.  That seems to be the only thing that makes sense and what I'd normally think as well. The rear reading is in the range of my normal expectations for an enabled ACR and that's what was throwing me off.  I was expecting the front to be a little higher.  I guess I need to reset my expectations...   

I'm going to install roller rockers when I replace the cam.  Since I have a extra set of new ACRs and I'll replace both when I am in there as a preventative measure.

The compression seems to be on the high side.  This motor runs hot and I have problems with pinging between 2.5K and 3K.  Its been tuned/retuned a coupe of times by the same guy, however its never really run right since.  I really want to take it to Doc, but have been to busy with work and family to make the trip to FL.   This bikes turned into a hangar queen... Thank heaven I have another to ride while this one sits there.  If I had to do over, I would have kept it stock or went with a S&S 124.

I'll need to have it retuned after the CAM change.  Are you aware of any reputable TTS tuners (Preferably trained by Doc and that use all of the TTS features) near Rockford IL (Northern IL or Southern WI)?

Tom

[HD Street Performance]

Often times the ACRs are not tight and leak. Evidence is black in the stack.
For tuning
Razorback Performance, Whitehall, WI (715) 797-0454
Paradise Performance, Mattoon IL (217) 273-6847

[Steve Cole]

Talk with Jason at C&S as he is in that area I believe and is a site supporter.

4802 Old Missouri Ave    
Alorton    IL    USA    
618-271-1523

As for Paradise Performance stay far far away. Razorback Performance I do not know off hand.

On the ACR's I would at least look at them when your in there to change the rockers, sometimes we think to hard and skip the easy stuff. I've been working night and day putting camshafts in a 110 Shower Head for tuning and testing and this weekend I did one that I knew something was not right. Well, after screwing around for a few hours doing a half ass tune and knowing all along something was wrong, I quit and went home. Come in the next morning and retraced my steps only to find I screwed up the pushrod adjustment. Reset them and everything was fine but why didn't I think of that right away instead of wasting a few hours I do not know. Now that I look back I'm sure that I figured I just set them it couldn't be wrong, well it was! Now 6 days in and 14 camshafts and 28 tune-ups done it all sounds so easy with only 4 more camshaft to get done. Just take your time and make sure that with the ACR's OFF the cylinders have the same compression and then you know the engine is sound.

[HDGearHead]

Thanks Steve.  All good advice.

I've heard of Jason at C&S and he's number 2 on my list after Doc.  Jason is about 5 hours away which is fairly reasonable.

One of the guys I ride with suggested Drago's Bike Works.  Drago's is about 30 minutes from me which would be ideal.  Unfortunately, I don't know how he is with the TTS tuner.  I know he tunes the Thundermax.

I've heard of Jim at Paradise Performance.  Although there are those that swear by his tunes, I'm looking for someone that fully utilizes all of the TTS capabilities so that ruled him out.

[Black Diamond]

I'm a Paradise Performance customer.  I recommend Jim to others.  They now also recommend him.  I base my recommendations on my personal experiences.  FWIW.

JW

[HDGearHead]

On the ACR's I would at least look at them when your in there to change the rockers, sometimes we think to hard and skip the easy stuff. I've been working night and day putting camshafts in a 110 Shower Head for tuning and testing and this weekend I did one that I knew something was not right. Well, after screwing around for a few hours doing a half ass tune and knowing all along something was wrong, I quit and went home. Come in the next morning and retraced my steps only to find I screwed up the pushrod adjustment. Reset them and everything was fine but why didn't I think of that right away instead of wasting a few hours I do not know. Now that I look back I'm sure that I figured I just set them it couldn't be wrong, well it was! Now 6 days in and 14 camshafts and 28 tune-ups done it all sounds so easy with only 4 more camshaft to get done. Just take your time and make sure that with the ACR's OFF the cylinders have the same compression and then you know the engine is sound.

I've been there and done that before myself.  We end beating ourselves up for wasting time and busting our knuckles while trying to avoid what we knew or felt really needed to done to remedy the situation from the start.  Other times, we just need to step away for a moment (or day) and focus on something else until the problem becomes clear again. It usually happens to me when I'm fatigued, stressed or under pressure while being complacent because I've done a particular job a hundred times before.  Human Factors...

BTW - That's an impressive amount of cam changes and tunes you managed to accomplish in 6 days....

Regards,

Tom
 

[HDGearHead]

I'm a Paradise Performance customer.  I recommend Jim to others.  They now also recommend him.  I base my recommendations on my personal experiences.  FWIW.

JW

No offense meant to you to Jim.  As a tuner in general, Jim is a top notch.  However, Jim is not a TTS tuner (unless he's had a recent change of heart).

Its my understanding that while Jim will use a TTS while tuning, he does not tune with it.  I believe Jim uses TwinScan for tuning and the TTS device only as an interface/input device.  He does not use VTune, CamTools, EGR tuning, etc..  Its also my understanding that his tunes are generally set to run in open loop and that he does not use .MT8 files.  He's previously publicly stated as much, as well as his thoughts and opinions regarding the TTS.

I am looking for someone that is believes in and is proficient with tuning using all that the TTS system has to offer.  Because of this, I will not be using Jim to tune my bike. This is NOT inferring that the tune you received from Jim is good or bad.

I don't want to turn this into a pro/con strokerjlk thread.  There are plenty of existing threads on this site and the HTT site covering this already.

Tom

[HD Street Performance]

So lets get real..

This is personal
This guy doesn't like that guy or use whatever technique this guy likes blah blah..

Jim will use, competently, Power Vision, TTS, SEST or Tmax and probably others.
The quality of his tune regardless of the device or technique works. Period. I know several folks that trek from far away distances to use him and for a good reason. The tunes work well, plain and simple as that, plus his price is fair.

[Black Diamond]

No offense meant to you to Jim.  As a tuner in general, Jim is a top notch.  However, Jim is not a TTS tuner (unless he's had a recent change of heart).

Its my understanding that while Jim will use a TTS while tuning, he does not tune with it.  I believe Jim uses TwinScan for tuning and the TTS device only as an interface/input device.  He does not use VTune, CamTools, EGR tuning, etc..  Its also my understanding that his tunes are generally set to run in open loop and that he does not use .MT8 files.  He's previously publicly stated as much, as well as his thoughts and opinions regarding the TTS.

I am looking for someone that is believes in and is proficient with tuning using all that the TTS system has to offer.  Because of this, I will not be using Jim to tune my bike. This is NOT inferring that the tune you received from Jim is good or bad.

I don't want to turn this into a pro/con strokerjlk thread.  There are plenty of existing threads on this site and the HTT site covering this already.

Tom

Your bike, your money.  I have no dog in this hunt.  Just stating my experiences.  FWIW,  Jim recommended I use (and am using) TTS on two of my scooters.  You could ask Jim yourself.  Ride safe and good luck! 

JW

So lets get real..

This is personal
This guy doesn't like that guy or use whatever technique this guy likes blah blah..

Jim will use, competently, Power Vision, TTS, SEST or Tmax and probably others.
The quality of his tune regardless of the device or technique works. Period. I know several folks that trek from far away distances to use him and for a good reason. The tunes work well, plain and simple as that, plus his price is fair.

 

[GMR-PERFORMANCE]

 The ECM is not looking for a CCP number but a RPM number . The ACR will try to target a certain cranking RPM , and being that the ACR is not just on or off,.. but in factthe duty cycle is controlled by the ECM ,...So yes the numbers with the ACR on while cranking will vary.

[HILLSIDECYCLE.COM]

Thanks Steve.  All good advice.

I've heard of Jason at C&S and he's number 2 on my list after Doc.  Jason is about 5 hours away which is fairly reasonable.

One of the guys I ride with suggested Drago's Bike Works.  Drago's is about 30 minutes from me which would be ideal.  Unfortunately, I don't know how he is with the TTS tuner.  I know he tunes the Thundermax.

I've heard of Jim at Paradise Performance.  Although there are those that swear by his tunes, I'm looking for someone that fully utilizes all of the TTS capabilities so that ruled him out.

A shop that has been around a loooooooooooong time, that tunes very well, is Valley Racing, in Beecher, ILL.
Jim Kennedy is very good as well.
Scott

[HDGearHead]

This is personal.  A personal choice for me the consumer.

I've read multiple threads here and on HTT going back and forth about this. I've seen enough posts (not just from Steve and Jim) that have created "my perception" that Jim's tuning method/technique and views are not completely aligned with those espoused/embraced by tuners that fully utilize the TTS system for tuning.  Maybe my perception is wrong.

I'm looking for a tuner that can be considered a TTS Master Technician. I want someone that is going to use all of the variables/features that the TTS system (Device and Software) has to offer (that why I bought it).  I want someone that is going to use CamTools and do EGR tuning.  I want a closed loop tune in cruise and want the tuner to make use of all of the tables exposed in the MT8 files.

Basically, I want to use someone that tunes like Doc (preferably trained by Doc and trusted by Steve) near me.  Someone that uses the same methods/technique, processes and tools as prescribed by Steve and Doc.  Is that Jim?  It's my perception/understanding that it's not.

This does not mean or imply that Jim is not a good tuner (just different from what I the consumer am looking for).  I'm glad that Jim's customers are happy with his tunes.  I suspect most people that received a tune from him are. 

I'm bailing out of this.  I'm either going to use Jason at C&S or Doc (if I can make the time to travel to FL).

[HD Street Performance]

I couldn't' agree more. We are all faced with a multitude of good choices. I don't want to insinuate that Jim is the "sole source" just one of the good ones.