The Sportster and Buell Motorcycle Forum - The XLFORUM®
 

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE & BUELL MOTORCYCLE FORUM - GENERAL DISCUSSION > Product Reviews
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Notices

Product Reviews Here is where you can write up your own review of bikes, parts, or accessories.

Please do not post problems in here unless replying to a review. Please post problems with specific parts or accessories in their respective forum topics.


Active Threads
0 Keep & Kill
Last Post: Crusty
Posted On: 5 Minutes Ago
Replies: 29,779
Views: 1,748,625
0 Oops, I signed up for another long ass ride: The 2022 Hoka Hey
Last Post: ChinCactus
Posted On: 18 Minutes Ago
Replies: 42
Views: 4,009
0 Poor running bike trouble shooting help
Last Post: Racepres
Posted On: 30 Minutes Ago
Replies: 36
Views: 1,807
0 what size motor?
Last Post: needspeed
Posted On: 52 Minutes Ago
Replies: 13
Views: 327
0 Mikuni trouble
Last Post: gusm2
Posted On: 1 Hour Ago
Replies: 0
Views: 23
0 you tube screw up
Last Post: thefrenchowl
Posted On: 1 Hour Ago
Replies: 12
Views: 1,263
0 West Virginia fall run 2022
Last Post: joes95bobber
Posted On: 1 Hour Ago
Replies: 30
Views: 1,632
0 Allegheny National Park III
Last Post: joes95bobber
Posted On: 1 Hour Ago
Replies: 251
Views: 28,898
0 Compression height -- am I right?
Last Post: xlh59
Posted On: 1 Hour Ago
Replies: 50
Views: 12,350
0 1972 Build thread please subscribe
Last Post: ryder rick
Posted On: 2 Hours Ago
Replies: 171
Views: 27,471
0 how do I put engine back in frame
Last Post: doodah man
Posted On: 2 Hours Ago
Replies: 9
Views: 208
0 KT - 2022 - Show A Little Backbone
Last Post: IXL2Relax
Posted On: 3 Hours Ago
Replies: 38
Views: 5,591
0 DoctorMotorcycle's Turbo Kit Development for 86-03 Sportster 1200's
Last Post: DrMotorcycle
Posted On: 3 Hours Ago
Replies: 19
Views: 1,259
0 Not Running Right
Last Post: rejeanprimeau
Posted On: 4 Hours Ago
Replies: 25
Views: 1,201
0 Instrument of Expression, the next chapter of the Sportster legacy
Last Post: Blackbenny
Posted On: 4 Hours Ago
Replies: 49
Views: 4,625
0 FTC - Harley-Davidson - Customers’ Right to Repair
Last Post: Nibelungen
Posted On: 5 Hours Ago
Replies: 7
Views: 319
0 Hottie of the day, no nudity.
Last Post: Stairman
Posted On: 5 Hours Ago
Replies: 37,755
Views: 4,746,406
0 Hot Rods, Rat Rods, and Customs.
Last Post: Stairman
Posted On: 6 Hours Ago
Replies: 5,307
Views: 1,184,759
0 Grenade plate fix with XR1200 parts...
Last Post: Crusty
Posted On: 6 Hours Ago
Replies: 90
Views: 18,338
0 Seeking information on long lost "race" parts
Last Post: Ferrous Head
Posted On: 9 Hours Ago
Replies: 22
Views: 1,554
0 Cutting off Mufflers...Open Pipes
Last Post: Ferrous Head
Posted On: 12 Hours Ago
Replies: 4
Views: 226
0 eBay racetech emulators?
Last Post: Tomcatt
Posted On: 15 Hours Ago
Replies: 1
Views: 148
0 Spool Wheel lacing
Last Post: mofosheee
Posted On: 19 Hours Ago
Replies: 22
Views: 1,768
0 Sportster Oil Pressure and Dynamics
Last Post: Hippysmack
Posted On: 21 Hours Ago
Replies: 318
Views: 19,455
0 Cafe Bars/Drag Bars/T Bars
Last Post: Dave L
Posted On: 21 Hours Ago
Replies: 130
Views: 117,832
0 Something different: 1948 Willys Truck
Last Post: ChinCactus
Posted On: 22 Hours Ago
Replies: 48
Views: 6,405
0 Brake drum out of round
Last Post: Tim The Grim
Posted On: 22 Hours Ago
Replies: 28
Views: 1,425
0 Will earlier year rear sprockets fit on an 06?
Last Post: Sirrom1
Posted On: 22 Hours Ago
Replies: 2
Views: 292
0 Food porn
Last Post: Stairman
Posted On: 1 Day Ago
Replies: 2,838
Views: 732,923
0 1981 XLH Getting Recranked
Last Post: Iron Mike
Posted On: 1 Day Ago
Replies: 134
Views: 8,508
More...
Members Birthdays
Reply
 
Share Thread Tools Display Modes
  #1  
Old 31st July 2007
PSEBYL's Avatar
PSEBYL PSEBYL is offline
Master Mechanic
 
Join Date: Mar 2005
Location: AZ
Posts: 256
Sportster/Buell Model: 883
Sportster/Buell Year: 2005
Reputation: 257
PSEBYL is on a distinguished roadPSEBYL is on a distinguished roadPSEBYL is on a distinguished road
Default Review: Dynatek DSPT-1 Ignition Module

I haven't read about any 883's using the Dynatek DSPT-1 ignition module (only a few 1200's), so here are my observations.

I replaced my stock ignition module because my bike would frequently have carb farts when blipping the throttle while decelerating, particularly when down shifting from 2nd to 1st gear (too much timing advance at low RPM). Not cool when rolling on throttle in a turn!

I originally considered both the Dynatek DSPT-1 and the Daytona TwinTec TC88A. I favored the DSPT-1 for the following reasons:
1) Cost. The DSPT-1 is $100. less than the TC88A.
2) Simplicity. I wanted a plug-n-play ignition module. I don't need the user programmability, or data logging features of the TC88A.
3) Specifications. The DSPT-1's advance tables are factory programmed specifically for a Sportster, versus the TC88A's advance tables being pre-programmed specifically for a big twin (with claims to being compatible with a Sportster).
4) Support. Dynatek was very friendly and helpful to my inquiries pre-purchase. Daytona TwinTec was very cold and impersonal to the same inquiries; I felt like I was corresponding with a rock.

Research:

I compared advance table charts from Daytona TwinTec and Dynatek. The nominal timing values are quite different. For example, the TC88A with setting #5 provides 24° of advance at idle versus the DSPT-1 which provides 12° of advance at idle; a big difference. The DSPT-1's selectable advance curves, in the nominal range, are very close to the custom curve(s) that Turbota developed for the TC88A.

I was concerned about the DSPT-1's non-adjustable VSS frequency of 1356 hz @ 60 MPH. I assume this frequency was chosen to split the difference between the 883's factory VSS frequency of 1381 hz, and the 1200's factory VSS frequency of 1338 hz. BEWARE…the DSPT-1 will only provide an acceptable amount of speedometer error for a 2004-2005 Sportster. The DSPT-1's VSS frequency, as developed for the "new" 2004 Sportster, did not account for the future change in the 2006 Sportster's transmission (see 061200c's issue with his 2006 Sportster with DSPT-1 here http://xlforum.net/forums/s...ad.php?t=29669 ).

Usage:

The DSPT-1 has 16 user selectable advance curves in 4 separate groups, using 1 rotary switch:
Group A) 4 curves for stock motors.
Group B) 4 curves for high torque motors (>1 ft. lb. per c. i. @ 2-4K RPM).
Group C) 4 curves for turbo and nitrous applications only.
The 4th group of 4 curves is described as retard curves, which Dynatek neither defines nor even mentions using in their instructions.
The first 12 curves are named for their timing value at WOT (for example, 34A = 34 degrees of advance at WOT, group A). The procedure is to use the highest advance curve, in the appropriate group, without pinging. The other rotary switch adjusts for 8 different RPM limits ranging from 6250 to 8500.

My results:

The first thing I noticed is that the “check engine” light doesn’t illuminate for the first few seconds once the key is in the ignition position. Maybe it doesn’t support H-D’s diagnostic monitoring? I recently added the H-D tach kit; there was no change in tachometer functionality, or any indicator other than the “check engine” light.

I started with the 34A setting, then switched to the 36A setting, without telling much of a difference. Then I tried the 38A setting. Immediately, I could feel an improvement in off-idle throttle response. Once warmed up, the rhythm of the idle seemed to be smoother as well. At cruise, I felt a slight reduction in engine vibration at steady state throttle @ 3K RPM. No perceptible difference at WOT. Speedometer error with the stock module was 1% slow, and now with the DSPT-1 it’s 1% fast.

Returning home, there are few slow speed turns, including my driveway, which usually yield 1 to 2 carb farts while blipping the throttle on decel. I didn’t get a single one! I even tried to cause them. Once parked in my driveway at idle, I thought surely I could force a carb fart by whacking the throttle open. I tried several times. NO CARB FARTS! The engine just responds in kind. I couldn’t believe it!

This ignition module did not provide any real seat-of-the-pants performance improvement. It did, however, provide a more tractable throttle, which improves the drivability and enjoyment of my bike. Was it worth the $189.? It was for me just to get rid of the carb farts.

Reply With Quote
  #2  
Old 31st July 2007
1Ray Hewett 1Ray Hewett is offline
Biker
 
Join Date: Apr 2007
Posts: 3
Sportster/Buell Model: 100th Anniversary
Sportster/Buell Year: 2003
Reputation: 10
1Ray Hewett is an unknown quantity at this point
Default

As long as the farts don't smell, I can live with them.
Reply With Quote
  #3  
Old 31st July 2007
milmat1's Avatar
milmat1 milmat1 is offline
Senior Master Custom Bike Builder
 
Join Date: Jul 2006
Location: Lexington, NC
Posts: 7,425
Sportster/Buell Model: Sportster 1200C
Sportster/Buell Year: 06
Blog Entries: 2
Reputation: 426836
milmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond reputemilmat1 has a reputation beyond repute
Default

Great report !!

Let us know if you find out about the engine light !! I'm curious now !!!!
Reply With Quote
  #4  
Old 31st July 2007
Weo Weo is offline
Senior Master Custom Bike Builder
 
Join Date: Feb 2007
Location: Illinois
Posts: 4,480
Sportster/Buell Model: 883-1250
Sportster/Buell Year: 1999
Other Motorcycle Model: 600cc CBR
Other Motorcycle Year: 1987
Reputation: 29233
Weo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to allWeo is a name known to all
Default

Thanks for the info!
Reply With Quote
  #5  
Old 1st July 2014
flip21boards flip21boards is offline
Biker
 
Join Date: Apr 2012
Posts: 19
Sportster/Buell Model: XL1200
Sportster/Buell Year: 2004
Reputation: 10
flip21boards is an unknown quantity at this point
Default

I ended up getting one. They work great! I have a 04 sporty with a 1200 conversion 9 5 1 compression. my bike really woke up around 28b and 30b.

Last edited by flip21boards; 3rd July 2014 at 19:39.. Reason: messed up
Reply With Quote
  #6  
Old 21st December 2021
runnermedic runnermedic is offline
Biker
 
Join Date: Jun 2020
Posts: 1
Sportster/Buell Model: xl883c
Sportster/Buell Year: 05
Reputation: 10
runnermedic is an unknown quantity at this point
Default

Old thread but this module still on sale.
Found this:
The problem of losing the check engine light is because this module does not save or transmit information through the diagnostic port, the Grn / V cable that goes from the module to the port and then to the speedometer is dead. Compared to the original module, it presents changes in voltage that are translated into data. If you want to know the status of your motorcycle you must use the speedometer diagnostic method and there you can see the saved codes. The lack of this module not having the communication function through the j1850vpw + protocol causes the loss of making diagnosis and not sharing data such as rpms, gear position voltage, security system and other data. In reality, the benefits are few and to top it off, it takes away functions. So the other option would be tc88 or go back to the original module if you want to keep these options. If there is a better option and someone knows about it please share it.
Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT +1. The time now is 17:25.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC