My extended Sprint mod happy ending - Page 4 - Triumph Forum: Triumph Rat Motorcycle Forums
» Main Menu

Discussion Forums
 » Twins
 » Tiger
 » General
 » RAT

Features
 » Blogs

Motorcycle.com Links

Contribute
 » Photo

Motorcycle Forums
» Insurance
» Sponsors
» Our Partners
»ATV Reviews
»Motorcycle Games

Sprint Forum Sprint ST - Sprint RS - Sprint GT Join in on one of the world's most active Triumph Sport-Touring Forums.

Reply
 
LinkBack Thread Tools Display Modes
Old 11-09-2012, 09:55 PM   #31 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: '08 Sprint ST
 
sussurf's Avatar
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 851
Other Motorcycle: '06 Daytona 955i
Extra Motorcycle: Husqvarna Terra 650
I think I was averaging between 5.1-5.6 L/100km.
Correct me if I'm wrong but is that around or more than 50mpg?
When we dyno tuned the bike and after finishing the final mapping adjustments, I quickly threw on my modded exhaust and got the following (see attached image). The boat anchor is the run on the modded stock exhaust. Interesting hey? But I love the look and sound of the Tridents....Weight difference in about 2.2 kgs all up.
I'm sure you'll do well Phillip. Just take your time and take a little off at a time. After the TB's and the exhaust, consider carefully the head and cams. This is where I believe any more gold lies. The factory shaped throats on the inlet side were very ordinary. There just wasn't enough material to fit a nice curved throat in there right at the valve. I reshaped as best I could but they really needed to be built up & re-shaped on the roof of the downturned section. So mine were not great but I think I managed to improve on the ex-factory shaping. I'd love to see a Daytona head.
And cams are an option also. Sacrifice some of that massive low down torque to get some more top end HP.
Attached Thumbnails
My extended Sprint mod happy ending-phils-trumpy-dyno_0002.jpg  
__________________
cheers,

Phil

Last edited by sussurf; 11-09-2012 at 10:03 PM.
sussurf is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-10-2012, 01:38 PM   #32 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: 2009 Triumph Sprint ST
 
Join Date: Jul 2008
Location: Cross Plains, Wisconsin USA
Posts: 102
Phil,

1liter = .264 gal
1km = .621 miles
5.3L = 1.399 gal
So, 62/1.399=44.3 mpg

I would be happy with that.

As for the boat anchor, very interesting results. That will be my direction for now. I'm on a tight budget, now that I am retired, and promised Jane I would not go overboard. I did promise her a new seat for her comfort and an Ohlins or Penske shock for sure. The forks have been upgraded with different springs and valves shimmed. I have a fork braced ordered
http://i1237.photobucket.com/albums/...r/zrxbrace.jpg

http://i1237.photobucket.com/albums/...r/DSCN2992.jpg

Looks like my idea for air box intake will be feasible. It should open up the tiny intake hole to about 4.75" x 2.5". My friend might not get to that until later this winter. Hunting season is in the way right now.
Will keep posted with pics as things progress.

Cheers to you and yours

Philip
pmc847 is offline   Reply With Quote Quick reply to this message
Old 11-10-2012, 03:54 PM   #33 (permalink)
Lifetime Premium
Site Supporter
Supernova
Main Motorcycle: 2011 Sprint GT 1050
 
DaveM's Avatar
 
Join Date: Mar 2005
Location: Brisbane Australia
Posts: 22,440
Other Motorcycle: 2004 Daytona 955
Extra Motorcycle: Previously - Many
Hi Phillip I am on my iPhone app so cannot see where you are from but I am guessing the USA so you are talking about US gallons not imperial?


Sent from my iPhone using Motorcycle.com App
__________________


My album click here;

http://www.triumphrat.net/memberalbu...er/2712/sort/3
DaveM is online now   Reply With Quote Quick reply to this message
Old 11-10-2012, 06:41 PM   #34 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: 2009 Triumph Sprint ST
 
Join Date: Jul 2008
Location: Cross Plains, Wisconsin USA
Posts: 102
I'm in the Madison, Wisconsin area. Yes, US gallons.

Cheers.

Philip
pmc847 is offline   Reply With Quote Quick reply to this message
Old 11-10-2012, 11:21 PM   #35 (permalink)
Lifetime Premium
Site Supporter
Supernova
Main Motorcycle: 2011 Sprint GT 1050
 
DaveM's Avatar
 
Join Date: Mar 2005
Location: Brisbane Australia
Posts: 22,440
Other Motorcycle: 2004 Daytona 955
Extra Motorcycle: Previously - Many
Thanks for clarifying Phillip, I am easily confused at times!
__________________


My album click here;

http://www.triumphrat.net/memberalbu...er/2712/sort/3
DaveM is online now   Reply With Quote Quick reply to this message
Old 11-11-2012, 02:11 PM   #36 (permalink)
Senior Member
Grand Prix 500
Main Motorcycle: 2003 sprint st
 
Join Date: Oct 2011
Location: grand forks bc
Posts: 149
Hi Phil. You mention that you believe it was the the head work that made the difference. I have about 55000 miles on my 03 955. One of the intake valves is showing close to lowere limit. If it indicates the minimum (0.1 m) this winter I will probably reshim. But, thinking down the road, I might consider doing the head. Sounds like you had a successful experience here. Who did the work and what was the cost? Any other advice. Also, when considering such a project I need to consider the rest of the engine. Did you in any way check to see if there was any bottom end attention needed (other than the transmission work you described). I love my bike and have taken care of it but at some point the law of diminishing returns kicks in and it makes more sense to replace the bike. Thanks for your instructive post. Obviously you have no fear of trying stuff and getting in there up to your elbows. You are a true road warrior. - Jim
jsprinter is offline   Reply With Quote Quick reply to this message
Old 11-12-2012, 05:03 PM   #37 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: '08 Sprint ST
 
sussurf's Avatar
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 851
Other Motorcycle: '06 Daytona 955i
Extra Motorcycle: Husqvarna Terra 650
Thanks Jim.

I don't think the head work made the most HP difference. I suspect it was the TB and exhaust matching work, reinforced by the dyno session. The headwork, as it turned out, was a good idea despite the bike performing very well. I had overheated the bike and it seemed at least a couple of the exhaust valves were not seating correctly.

My advice was that the re-seating of all the valves using a CNC 3-way grind would give a great result in terms of the torque and rideability of the bike, so I guess torque more than anything. Mention was also made of long term reliabilty and fuel efficiency. It was also a chance to inspect all the valves and seals, a couple of which (seals) had to be replaced. I took the opportunity to do some DIY port work. I cleaned up as much of the poor casting marks as I could, and some of it on the exhaust side was pretty bad. I've already mentioned the intake throats but I guess that's mass production for you.

The work was done by a specialist cylinder head guy here in Sydney so I guess that's irrelevent to you. The machining, including refacing the head was about $350 and my mechanic charged me about $400 to strip and reassemble the head and re-shim everytyhing. I did, however, have to re-shim again slightly after torquing the head back on the motor so would probably save the shimming until the end. Just make sure to measure all the shims with a micrometer to check them and have quite a few spare sizes on hand. I made up an excel spreadsheet which really helped me figure out what shims I had and what I needed. Often you can shuffle them around limiting what you have to buy/swap for this job. I'm happy to share it with anyone who wants it just PM me.

I got to have a good look at both the top end and bottom end of the engine. The top end looked brand new. The bottom, ie the crankshaft bearing shells had some minor wear marks but certainly nothing to worry about. I'm expecting this engine will last a long time with reasonablr care. I was advised to try to ascertain which bearings were in there should I ever need to replace them but there were no discerning marks on them at all so I'm not sure how the process would work if you ever needed to order replacements from Triumph.

I know I could probably have thrown all that money at a new bike but I love this bike. It fits me, I love the way it goes, handles, sounds. I now have the bike I love optimized to be as good as it can be. And if I wore it out, I'd re-build it or do it to another one. I now have so much familiarity with these bikes, including the special tools so, I guess, I'm invested. I think it's a good way to be.
Attached Thumbnails
My extended Sprint mod happy ending-valve-spreadsheet.jpg  
__________________
cheers,

Phil
sussurf is offline   Reply With Quote Quick reply to this message
Old 11-14-2012, 06:23 PM   #38 (permalink)
Member
Grand Prix 250
Main Motorcycle: Triumph Sprint ST 1050 06
 
Join Date: Oct 2010
Location: NSW Australia
Posts: 44
Great mods and thread phil thanks for sharing, hope she continues to wrap smiles round your face, let me know when it's for sale Cheers Matt
Trumpzy is offline   Reply With Quote Quick reply to this message
Old 11-14-2012, 06:44 PM   #39 (permalink)
Senior Member
SuperSport
Main Motorcycle: '08 Sprint
 
elevens's Avatar
 
Join Date: Sep 2008
Location: yoo ess of eh
Posts: 1,012
The Phil pill is like a drug to some of us over-the-top performance nuts
elevens is offline   Reply With Quote Quick reply to this message
Old 11-14-2012, 07:05 PM   #40 (permalink)
Senior Member
Formula Extreme
Main Motorcycle: '08 Sprint ST
 
sussurf's Avatar
 
Join Date: Nov 2009
Location: Sydney, Australia
Posts: 851
Other Motorcycle: '06 Daytona 955i
Extra Motorcycle: Husqvarna Terra 650
Quote:
Originally Posted by Trumpzy View Post
Great mods and thread phil thanks for sharing, hope she continues to wrap smiles round your face, let me know when it's for sale Cheers Matt
Matt you should have kept your bike. We could have hot-rodded that baby like there was no tomorrow....So now you have to ride b___h on mine!

Quote:
Originally Posted by elevens View Post
The Phil pill is like a drug to some of us over-the-top performance nuts
Yep, although I got hooked initially on the Bill pill...
__________________
cheers,

Phil
sussurf is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
03 sprint extended swing arm caspian84 Sprint Forum 19 10-24-2010 12:23 AM
Sprint 1050 '08 Extended Warranty - worth it? FazerKev Sprint Forum 16 06-27-2010 08:00 PM
Brake Woes - Happy Ending nmendham Sprint Forum 3 11-07-2008 07:45 AM
Sprag clutch - happy ending scloughley Speed Triple Forum 1 08-21-2008 06:32 PM
Ending Backfire ajfisher Twins Technical Talk 8 09-19-2006 09:09 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 11:57 PM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Forum Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Honda Vultus Forum HD LiveWire Forum Ninja H2 Forum Ducati Scrambler Forum Kawasaki Ninja 250SL Forum

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.