Daytona Twin-Tech TCFI tuning - Page 48 : V-Twin Forum: Harley Davidson Forums

niget2002 · 01-17-2008, 07:42 AM

I touched mine on Sunday for the first time since April 4th... and all I did was check the tps voltage and grab the log. Like Chef said... once you get it running, it's a dream.

Unfortunately, I can't help much as my bike doesn't have a lot done to it. I'm sure I'll be back in here after I do my next build.

FLSTCI124" · 01-18-2008, 09:05 AM

I notice there is an option for adjusting the Rear Cylinder Timing. What is the advantage of this and when or why would you use it?

Was having some very erratic readings on my Logs, then I added an additional grounding cable from the Neg terminal on the battery to one of the starter bolts.

Didn't seem to help the problem of the engine not turning over on the 1st or 2nd push of the starter button but it DID smooth out all the Log readings.

Before adding this extra cable, all my Log files showed sharp spikes & dips like an EKG of someone having a full-blown heart attack!

Now they are straight and look very similiar to the charts shown on the DTT Instructions.

Very weird...

Turn signals still don't self-cancel though...

wkohn · 01-18-2008, 05:39 PM

Quote:

Originally Posted by FLSTCI124"

I notice there is an option for adjusting the Rear Cylinder Timing. What is the advantage of this and when or why would you use it?

Was having some very erratic readings on my Logs, then I added an additional grounding cable from the Neg terminal on the battery to one of the starter bolts.

Didn't seem to help the problem of the engine not turning over on the 1st or 2nd push of the starter button but it DID smooth out all the Log readings.

Before adding this extra cable, all my Log files showed sharp spikes & dips like an EKG of someone having a full-blown heart attack!

Now they are straight and look very similiar to the charts shown on the DTT Instructions.

Very weird...

Turn signals still don't self-cancel though...

Interesting about the cable. I wonder if the same thing would happen by just going with a larger cable?

I haven't had a problem with my turn signals.

FLSTCI124" · 01-20-2008, 03:57 PM

All my battery cables are Sumax #2 gauge. I've personally never seen any bigger manufactured as battery cables.

I guess you could make your own if you really needed them larger?

AirGlider · 01-20-2008, 11:34 PM

I was talking to an Oddessey Battery Manufacturer's rep at the NY Expo. He said it is a good idea to change at least the neg. cable every two years due to the internal resistance that can build up from corrosion.

AG

Curtis Shipp · 01-21-2008, 07:30 PM

Quote:

Originally Posted by FLSTCI124"

Mighty dead in here...

Did everyone else finally get fed up with the TCFI and get a SERT?

I've e-mailed my MAP & Log to DTT. Called the DTT office but the lady that answered the phone said Chris Schroeder had already left for the day and there was nobody else there that could answer any of my technical questions... (??)

Because of how erratic all of my downloads are (MAP & Log), I'm begining to wonder if either the O2 sensors are bad or the TCFI unit?

Hopefully I'll hear back from DTT in a short time after they look at my stuff and perhaps shed some light on this...

Not fed up just real busy. I have a machine to design and build by the end of Feb. worth a bundle. We have been working on it since 1st of Dec. Will be back soon.

ktwillys · 01-21-2008, 10:48 PM

Curtis,,, nice to see you back.. good luck on the machine..

I have gone and changed my exhaust and intake so now I have to change my map too.
I have gone to a VH True Dual Header and Python Dresser Duals.
And I have also changed to the Gerlomay Dual Throttle Body..

If anyone has a map that will help get started I would appreciate it..

Thanks

FLSTCI124" · 01-22-2008, 05:36 AM

AG,

These cables are less than 2 years old. The response from DTT was "Call Curtis at anytime".

So I guess I will...

wkohn · 01-22-2008, 02:40 PM

Quote:

Originally Posted by ktwillys

Curtis,,, nice to see you back.. good luck on the machine..

I have gone and changed my exhaust and intake so now I have to change my map too.
I have gone to a VH True Dual Header and Python Dresser Duals.
And I have also changed to the Gerlomay Dual Throttle Body..

If anyone has a map that will help get started I would appreciate it..

Thanks

What else have you done to the bike and what year is it?

ktwillys · 01-24-2008, 09:42 PM

Quote:

Originally Posted by wkohn

What else have you don't to the bike and what year is it?

I have an 04 Road Glide bored out to a 95. I have an S&S .570 cam with the SE Pistons. My compression is approx 9.8 to 1, probably closer to 9.6 to 1. The heads are stock with Manley intake valves (stock diameter) with very little work to the intake and exhaust ports. I am running an K&N Filter in an S&S Tear Drop Air Cleaner. TCFI II for the ignition. And the V&H True Dual Headers with the Python Touring Slip-ons. I think that is it..
Yep forgot the Feuling Lifters, Cam Plate and Oil Pump.
And am going to add a Gerolmay Dual Throttle Body this weekend.

Would still like to find a Hi-Performance Ignition Coil for it but I dont think anyone makes one yet.

wkohn · 01-25-2008, 05:58 AM

Quote:

Originally Posted by ktwillys

I have an 04 Road Glide bored out to a 95. I have an S&S .570 cam with the SE Pistons. My compression is approx 9.8 to 1, probably closer to 9.6 to 1. The heads are stock with Manley intake valves (stock diameter) with very little work to the intake and exhaust ports. I am running an K&N Filter in an S&S Tear Drop Air Cleaner. TCFI II for the ignition. And the V&H True Dual Headers with the Python Touring Slip-ons. I think that is it..
Yep forgot the Feuling Lifters, Cam Plate and Oil Pump.
And am going to add a Gerolmay Dual Throttle Body this weekend.

Would still like to find a Hi-Performance Ignition Coil for it but I dont think anyone makes one yet.

There is no need to change the coil. It puts out more than enough juice.

FLSTCI124" · 01-27-2008, 09:34 PM

KT,
How did that Gerolamy TB work out? See any improvements over a single TB? Which & what size TB were you using previously?

ktwillys · 01-29-2008, 10:55 PM

Quote:

Originally Posted by FLSTCI124"

KT,
How did that Gerolamy TB work out? See any improvements over a single TB? Which & what size TB were you using previously?

I havent gotten to fire up the bike yet.. I am waiting on an exhaust bracket from VH to make the 07 exhaust system fit on my 04.. a few very minor differences.... lol..

I am also going to see if someone here has a good map for a starting point.
I am re-reading all the posts in this section and am finding a lot of good ideas. I am also contemplating sending my TCFI module in for the Gen III upgrade. They said it would cost 180.00 so it might be worth it. Still waiting to see what improvements there are going to be.

FLSTCI124" · 02-01-2008, 03:49 PM

I've been contemplating switching over to a dual TB as they are supposed to be able to attain more HP / TQ than a single TB.

DTT website says that a single TB is limiting factor for performance (past a certain level) compared to a dual TB.

My question is: if that is so, why do I see other big motors running a single TB and putting out some serious (145+ hp / tq) numbers?

wkohn · 02-01-2008, 05:38 PM

Quote:

Originally Posted by FLSTCI124"

I've been contemplating switching over to a dual TB as they are supposed to be able to attain more HP / TQ than a single TB.

DTT website says that a single TB is limiting factor for performance (past a certain level) compared to a dual TB.

My question is: if that is so, why do I see other big motors running a single TB and putting out some serious (145+ hp / tq) numbers?

I have a Gerolamy Dual TB. You will lose low end torque but gain high end Horsepower. The MoCo I hear uses Dual Throttle Bodies on their race bikes that use EFI.