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Author Topic: Head work or TB for more mid TQ  (Read 1781 times)

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Wenk

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Head work or TB for more mid TQ
« on: December 15, 2013, 10:04:15 AM »

Hello to everyone
I started with a great deal on a SE CVO 110 upgrade kit found out about issues afterward :o .  So where I saved I spent. ;)
Started with 2008 FLHTCUI 105 anniversary, changed cam and pistons in kit to a Genesis 577 cam and Mahale 4.060, 10.5:1 cr  pistons (Thanks Steve), Dragula 2:1 with 2.55 baffles (Thanks Frank), SE Cam plate and hi volume oiler, SE Oil cooler, Power Vision tuner, SE Heavy Breather. Rev.Prf. is doing bottom end work to case and cylinder boring (Thanks Andrew). My Indy Old Towne Cycles doing the labor (Thanks Brian)

Ok now here is my ?
 I did this build for 2 up packed down riding and some occasional twist the wrest make me smile time.
I am using my stock TB and stock CVO 110 heads and I still have my stock 96" heads .
 For future TQ  improvements and a $500.00 budget where would I get the most gain for the money in upper rpm. (4500 - 5000),  were TQ normally  starts to drop,  TB or Head work or just not possible for the $ limit
I think base set up with stock TB and CVO heads should get me near mid 120s in TQ with a good tune. might just stay where Iam
Any thoughts?
« Last Edit: December 16, 2013, 04:07:49 PM by Wenk »
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2008 FLHTCUI 105th Anniversary
Modified SE CVO 110 kit
113"/10.5:1cr Mahale's
Genessis 577 cams
SE Heavy Breather AC
PowerVision Tuner
Dragula 2:1/2.55 baffles
Timken upgrade
True, Balance and Weld Crank
SE Cam Plate /with oil pump
SE Oil cooler
SE Hi Flow 58mm TB

prodrag1320

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Re: Head work or TB for more mid TQ
« Reply #1 on: December 15, 2013, 12:12:37 PM »

have the t. body bored.the 110 heads flow decently stock for most milder builds

Wenk

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Re: Head work or TB for more mid TQ
« Reply #2 on: December 15, 2013, 12:22:51 PM »

Will that cause any issues with low rpm cruising or tuning ???
Who has good rep on doing this?
Thanks
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2008 FLHTCUI 105th Anniversary
Modified SE CVO 110 kit
113"/10.5:1cr Mahale's
Genessis 577 cams
SE Heavy Breather AC
PowerVision Tuner
Dragula 2:1/2.55 baffles
Timken upgrade
True, Balance and Weld Crank
SE Cam Plate /with oil pump
SE Oil cooler
SE Hi Flow 58mm TB

eddfive

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Re: Head work or TB for more mid TQ
« Reply #3 on: December 15, 2013, 12:24:19 PM »

No, as long as you get it tuned properly.
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HD Street Performance

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Re: Head work or TB for more mid TQ
« Reply #4 on: December 15, 2013, 12:25:58 PM »

Change the TB and retune the motorcycle, IMO
Will you gain midrange torque, not likely.
Your combo should be flush with midrange torque and if not I suspect tuning issues
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Wenk

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Re: Head work or TB for more mid TQ
« Reply #5 on: December 15, 2013, 12:48:27 PM »

Change the TB and retune the motorcycle, IMO
Will you gain midrange torque, not likely.
Your combo should be flush with midrange torque and if not I suspect tuning issues
Thank You. TB or Head work ? Was for possible Future improvements. Have not broken in this build as of yet Crappy weather.
I take what you are saying is TB work won't do more on midrange.
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2008 FLHTCUI 105th Anniversary
Modified SE CVO 110 kit
113"/10.5:1cr Mahale's
Genessis 577 cams
SE Heavy Breather AC
PowerVision Tuner
Dragula 2:1/2.55 baffles
Timken upgrade
True, Balance and Weld Crank
SE Cam Plate /with oil pump
SE Oil cooler
SE Hi Flow 58mm TB

prodrag1320

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Re: Head work or TB for more mid TQ
« Reply #6 on: December 15, 2013, 01:26:21 PM »

Will that cause any issues with low rpm cruising or tuning ???
Who has good rep on doing this?
Thanks

just boring the t. body will not really affect low end & will help alittle in mid & upper RPM ranges,tuning wont be a problem if you have a decent tuner (not any more a big deal than any other tune)you really need to have someone flow your heads & t. body to find out where you stand right now.we`ve found with the 110 heads,is that their already outflowing the t.body,so and headwork without addressing the t. body is kinda a waste

Steve Cole

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Re: Head work or TB for more mid TQ
« Reply #7 on: December 15, 2013, 03:00:10 PM »

Let's for a moment think about what your asking for. What is mid range to you? A stock TB will handle most everything up to about 4800 RPM, so are we talking about WOT or the whole riding area (<100%)? With out those answers first your going to be spending money and maynot get what you want.
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TorqueInc

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Re: Head work or TB for more mid TQ
« Reply #8 on: December 15, 2013, 03:11:40 PM »


 For future TQ and hp improvements and a $500.00 budget where would I get the most gain for the money in mid rpm. TB or Head work.
I think base set up with stock TB and CVO heads should get me near mid 120s in TQ
Any thoughts?
[/quote]

    Based on what you just asked for....and for the future

  S&S 58 throttle hog,well within your budget,you can bolt it on,will not have to port match it and will work very well with future upgrades.
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2011 SG Sedona Orange 105" 125/123

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HD Street Performance

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Re: Head work or TB for more mid TQ
« Reply #9 on: December 15, 2013, 03:15:49 PM »

110 heads,is that their already outflowing the t.body,so and headwork without addressing the t. body is kinda a waste

Unless of course the cam and exhaust system are limiting the combination and in that case the motors airflow demand is satisfied with the stock TB. It aint rocket science, it's called the law of constraints. IME TB changes to gain midrange is usually not fruitful. If the TB is not able to meet the demand this starts to rear its head at 4500+ rpm on a motor this size, worse on a larger motor. The stock TB has such a poor manifold the HPI setup will do more for you just based on a larger plenum and better shape/ transition to the ports. Boring the TB for a bigger throttle blade has't been that fruitful IME.
Before anything I would do a compression test and validate the ring seal.
« Last Edit: December 15, 2013, 03:18:15 PM by Deweysheads »
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prodrag1320

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Re: Head work or TB for more mid TQ
« Reply #10 on: December 15, 2013, 03:22:39 PM »

110 heads,is that their already outflowing the t.body,so and headwork without addressing the t. body is kinda a waste

Unless of course the cam and exhaust system are limiting the combination and in that case the motors airflow demand is satisfied with the stock TB. It aint rocket science, it's called the law of constraints. IME TB changes to gain midrange is usually not fruitful. If the TB is not able to meet the demand this starts to rear its head at 4500+ rpm on a motor this size, worse on a larger motor. The stock TB has such a poor manifold the HPI setup will do more for you just based on a larger plenum and better shape/ transition to the ports. Boring the TB for a bigger throttle blade has't been that fruitful IME.
Before anything I would do a compression test and validate the ring seal.

I agree,i guess I should have explained my point alittle better,when I said "addressing the T.body",i ment more than just boring it to a bigger blade

Steve Cole

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Re: Head work or TB for more mid TQ
« Reply #11 on: December 15, 2013, 08:17:57 PM »

The bottom line is you need to really define what your looking for or all your going to get is a lighter wallet!
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Wenk

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Re: Head work or TB for more mid TQ
« Reply #12 on: December 17, 2013, 12:28:37 AM »

Thank you; Steve ,at GMR.
I will call when ready to post Dyno results
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2008 FLHTCUI 105th Anniversary
Modified SE CVO 110 kit
113"/10.5:1cr Mahale's
Genessis 577 cams
SE Heavy Breather AC
PowerVision Tuner
Dragula 2:1/2.55 baffles
Timken upgrade
True, Balance and Weld Crank
SE Cam Plate /with oil pump
SE Oil cooler
SE Hi Flow 58mm TB
 

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