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Gains from HDSP ported heads on a Stage 1 96"

Started by 1FSTRK, January 14, 2016, 03:15:09 PM

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1FSTRK

Quote from: Just Nick on January 19, 2016, 08:08:03 PM
Quote from: 1FSTRK on January 19, 2016, 02:28:36 PM
This thread is about one of your heads being tested on a specific bike and looks like it will be a very good, very honest test. Why in the world would you bring up a different head that you also offer in this thread.

I did not bring up your TQ head you did. I just asked why you said you would recommend your TQ head for this application instead of what you sent Jim ?

You keep referring me to your web site, I can't get that answer from reading your web site. You paid to have this spot on HTT to promote your products and this gives us as prospective customers a place to ask some questions and get the answers.

I am asking polite, intelligent questions that I would like the answers to, at the same time they are for the most part great big softballs that you should be hitting out of the park full of information and yet you seem to do everything but just post a simple answer.

A little harsh there he was just stating that he has never been asked to do a set of heads for a stock engine and if he was what heads he would use. Personally I don't think this test matters because of what Don stated who is going to port a set of heads for a stock top end stock cam bike it's pointless. I think if say a set of cams that would work as a stg 2 cams that you could use in a stg 4 bike were installed and tuned with some 10.5/1 Pistons then pull the heads and do the porting and retune it would be a more viable test or comparison. But it will be interesting to see what ported heads on a stock 96" will do. Good on ya Don for putting your work up for a interesting test.

Once again all I did was ask a question about a statement he made and has yet to answer.

As far as your statement that the test does not matter, Don was the one that brought the subject up with his claims in the 103 thread he started. Why on earth would you guys deem this test meaningless before you even see the outcome? For those seeking the honest results it has meaning.

Why all the hostility and drama over a couple questions. Don and his supporters seem to project some evil on to anything I ask. This it starting to be reminiscent of the Palmer crowd.

This will be a fine test, it may not fit a sales agenda or back any unrealistic claims but that is what makes it such a good test. Lets just wait and see the result before we start trashing the outcome.  :hug:
"Never hang on to a mistake just because you spent time or money making it."

mayor

Quote from: strokerjlk on January 19, 2016, 12:45:32 PM
Once again . This is a test to see the gains for a set of ported heads , on a stock engine . ( stock cams, lifters , pushrods )
I think this will be an interesting test.  I have doubts that the stock '07 cams (with no overlap) will allow the tq curve to extend very far to the right though.  Is it safe to assume that a change in cams will be another test done at a later date?
warning, this poster suffers from bizarre delusions

strokerjlk

QuoteIs it safe to assume that a change in cams will be another test done at a later date?
You can count on it .
A scientific theory summarizes a hypothesis
repeated testing establishes theory

HD Street Performance

Quote from: mayor on January 20, 2016, 04:24:23 AM
Quote from: strokerjlk on January 19, 2016, 12:45:32 PM
Once again . This is a test to see the gains for a set of ported heads , on a stock engine . ( stock cams, lifters , pushrods )
I think this will be an interesting test.  I have doubts that the stock '07 cams (with no overlap) will allow the tq curve to extend very far to the right though.  Is it safe to assume that a change in cams will be another test done at a later date?
I appreciate everything Jim is doing and he has full control of the test and what the incremental changes will be.
Mike the stock cams do have overlap just not when measured at .050. Granted the overlap is minimal.
Thanks for your comments.

1FSTRK

Don could you give us the Stem protrusion for the intake and ex on your street pro heads?
Thank you
"Never hang on to a mistake just because you spent time or money making it."

harleytuner

I find it interesting just to see how much stock heads are holding a relatively stock bike back.  We've all done stage II big bores w/o headwork, then added heads and seen what the lack of good heads do on a "build".  This will be good to see what HD is leaving on the table right off the assembly line.  I imagine we will see pretty good gains from this.  It's not something that there is/will be a demand for in my market, but interesting no the less.

N-gin

That stock cam might be a healthy alternative to the 255.  :wink:
also save money..
I'm not here cause of a path before me, Im here cause of the burnout left behind

HD Street Performance

The HO cam is a small step up without the PMS. At 96" there wouldn't be any issue other than noise.

IronMike113

2 Bikes and 2 Beemers, that's what I have been told 😳

HD Street Performance

The results are posted in this thread
http://harleytechtalk.com/htt/index.php/topic,88341.125.html

89 / 99 pretty respectable.
+11hp and +2TQ with just a slight loss of low end torque.

I remember years ago when an "A" motor 95" with TW26, $299 head work, and added compression made similar numbers. This was on a DJ150 and the drive train was early 5 speed.

strokerjlk


Thanks Don for your work. I got a couple hr ride in today. you can sure feel the diff.
this has opened my eyes a little .
progress from bone stock to stage 1 ,and then your heads on the stage 1

A scientific theory summarizes a hypothesis
repeated testing establishes theory

sfmichael

excellent comparison - looking forward to the cam swap  :pop:

thanks for the knowledge  :up:
Colorado Springs, CO.

Carl 1969

Looks like tho it "only" gained 2lb ft peak, that there's quite a bit more area under the curve.

Big seat of the pants difference?
Lieber stehend sterben, als kniend leben
Sergeant First Class, US Army, Retired

HD Street Performance

Careful throwing swords at what is to be considered an incremental move not a suggested combination of parts. Just a test. I have never been asked to optimize a head package to work with a stock 96" but the heads would be a bit different than these if I did. Stay tuned

Carl 1969

If you're referring to my post, I'm not knocking them at all. Looks like they making a good bit more power overall.

Looking forward to seeing what happens with a cam.
Lieber stehend sterben, als kniend leben
Sergeant First Class, US Army, Retired

strokerjlk

A scientific theory summarizes a hypothesis
repeated testing establishes theory

strokerjlk

A scientific theory summarizes a hypothesis
repeated testing establishes theory