HarleyTechTalk

Quote from: Ohio HD on April 24, 2020, 11:27:17 PM
If it were mine, I would while the heads are off install AV&V tulip shaped valves, Stock size exhaust, 1.900" intake. Have a known to understand Harley motor head flow and velocity needed for your application. Clean and match the seat to casting connections, smooth the intake walls and leave a light sanded finish in the intake side. The exhaust just cleaned up and matched, the polish the exhaust ports. Three angle valve job.

As long as the velocity is as good or better than OEM, you'll see a little more flow that will also improve mid-range and low end  little. Keeping the velocity as high as possible keeps the low end strong.

Thanks Ohio, is great to know what can be done and what to do IF l choose to do it.
Especially if I think that down the track l might decide to put a slightly bigger cam in or up the compression...
Cheers

There are a lot of little things that would help.
Look at previously sent links.
The devil is in the details and a shop will charge you for these little things. 
Like Porsche, Chevy, they,  and Harley heads have been around for so long -there are some "knowns"  that will work.
No exotic flow bench needed.
No secrets required.
Virgin head needs to be shaved to raise CR  using stock pistons
Unshroud the exhaust valves is a  known.
Back cut valves is another and works on most engines.
On and on we can go.
But it becomes nickel dime stuff and adds up to bigger end bill. If you have no access to a face and hard seat grinder it will cost.
For instance, you can go larger valves using the same seats.
The port work- a novice can knock off ruff edges and feel good about it - Real port work requires welding, moving and reshaping.
That is what Basily does.
Scott at HillSide Harley does very impressive stuff too!
I have been in his shop and looked at dyno reports. I am not knowing at all what tricks he has up his sleeve.
I am impressed. He will share what he knows -but like most that actually know he is doing, is Not going to argue and waste time with the zillions of armchair fools on the net.
Do you want to read a fool's fool?  Go read the BS over where  Thermodyne hangs out. -
Endless BS from him and his little tribe of the cadre . An Arm chair chorus repeating what they have picked up through the years.
I will tell you this-those that shuffle words and make veiled secrets have every few to hide. (if any)
They can be read on most any forum every day and talk like they have the pot of gold at the end of the rainbow.
Most that leave open-end comments don't know shet and want to pretend.
Period.
I have earned every one of mine, trial, and error . More than willing to share.
Scott  from Hill Side is on here a Lot.
He is a SMART man. You can ask him what he does, he is more than happy to point out the armchair BS people from the real.
Baisley does not play on any of the forums and is     -S L O W-  and did I say expensive? Yes, he is.
B4 I met Scott I had him do a set, porting my heads------over 6 months to get them back. I lost a year there.
But I do know what his secrets are LOL!  (not that they are secrets ..)

So a LOT of people can talk about stuff, some of the track stars (1/4 milers) can add input-- But when they play cloak and dagger,- they can go to hell. Why should they ever bother here? 
What's the point?
To get all puffy chest and say I know and will not say??    LOL
There are a couple on here........Have not seen them on this thread.
You and those reading this have got a very good education this round. This time.
Glean all you can.
Read joe Mondello
and other great references.
http://johnmaherracing.com/tech-talk/3-angle-valve-job/
http://www.superchevy.com/how-to/89678-valve-angles

https://www.tabperformance.com/How-to-Choose-Motorcycle-Cams-s/215.htm

Quote from: thumper 823 on April 25, 2020, 02:21:21 AM

You and those reading this have got a very good education this round. This time.
Glean all you can.
Read joe Mondello
and other great references.
http://johnmaherracing.com/tech-talk/3-angle-valve-job/
http://www.superchevy.com/how-to/89678-valve-angles

https://www.tabperformance.com/How-to-Choose-Motorcycle-Cams-s/215.htm

No doubt about that, this has been an incredibly informative thread for me, and I am appreciative to all the knowledgeable people who have generously shared good information.

Thanks guys, l have learned a lot.
Cheers

Adam, I missed or have forgotten which model bike you have, and what exhaust you are using.

Quote from: Hossamania on April 25, 2020, 05:30:24 AM
Adam, I missed or have forgotten which model bike you have, and what exhaust you are using.

'96 Heritage softail nostalgia. Currently has the stock header with the high crossover and SE slash cut mufflers. But I'm planning on probably going with a thunder header / pro pipe / road rage long megaphone....
Already has a Mikuni carb and S&S teardrop air cleaner.
I've had so much good info from this thread, very helpful and very appreciated.   

Quote from: Adam76 on April 25, 2020, 05:40:38 AM

Quote from: Hossamania on April 25, 2020, 05:30:24 AM
Adam, I missed or have forgotten which model bike you have, and what exhaust you are using.

'96 Heritage softail nostalgia. Currently has the stock header with the high crossover and SE slash cut mufflers. But I'm planning on probably going with a thunder header / pro pipe / road rage long megaphone....
Already has a Mikuni carb and S&S teardrop air cleaner.
I've had so much good info from this thread, very helpful and very appreciated.   

I had to stop work on the springer, to knock out a couple sets of heads, so no I don't have cranking compression numbers. Maybe end of next week. IMO, I would use a Thunder Header, my favorite EVO 2 into 1.
John

Quote from: jsachs1 on April 25, 2020, 07:06:01 AM

Quote from: Adam76 on April 25, 2020, 05:40:38 AM

Quote from: Hossamania on April 25, 2020, 05:30:24 AM
Adam, I missed or have forgotten which model bike you have, and what exhaust you are using.

'96 Heritage softail nostalgia. Currently has the stock header with the high crossover and SE slash cut mufflers. But I'm planning on probably going with a thunder header / pro pipe / road rage long megaphone....
Already has a Mikuni carb and S&S teardrop air cleaner.
I've had so much good info from this thread, very helpful and very appreciated.   

I had to stop work on the springer, to knock out a couple sets of heads, so no I don't have cranking compression numbers. Maybe end of next week. IMO, I would use a Thunder Header, my favorite EVO 2 into 1.
John

99 out of a 100 dyno shops say the Thunder header is best ... actually I don't know the percentage but most would agree to that statement.

Quote from: Adam76 on April 24, 2020, 09:38:11 PM
What's with the attitude?

It's call GIN. Bombay Sapphire to be specific.


And with that, I think it's time for me to stop doling out the opinions and just step back.

-JW

All we have to offer here is opinions from our own experience.

I will offer mine cause I am RIGHT !   LOL
Seriously none of us has steered him wrong,  I just want to spend more of his money!

Adam -being you are replacing stem seals ..OS valves are not that much more money.....hahah
It is such a slippery slope but the fall is usually gentle ..unless you get tied up with a guy called a mechanic in  Sedro-Woolley...

Quote from: Adam76 on April 09, 2020, 05:40:47 PM

Quote from: HD Street Performance on April 09, 2020, 03:13:16 PM
I do the same build here, 9.5 kb pistons. It could go 10 with compression releases added and an aftermarket  ignition

Thanks HD, I thought everyone steered clear of KB pistons, but there are obviously differed types?
Which ones did you use?  Do you have a part number? Thanks Adam

I was refering to KB forged 4032 allow pistons with coated skirts. They are a high quality and affordable alternative.

Adam, I think you set a record, 7 pages, and 16 days, for a top end overhaul with a bolt in cam. Winter time (long time members know what I'm talking about)  never elicited this much enthusiasm, my hat is off to you for keeping people engaged in tough times.

Quote from: Deye76 on April 25, 2020, 04:18:27 PM
Adam, I think you set a record, 7 pages, and 16 days, for a top end overhaul with a bolt in cam. Winter time (long time members know what I'm talking about)  never elicited this much enthusiasm, my hat is off to you for keeping people engaged in tough times.

Yes Deye, l was just thinking that exact thought yesterday!!  Suprised myself, hope I didn't piss too many people off.

I think the  problem is - a complete top end build with a "bolt in Cam".... oxymoron right there. A bolt in Cam is a bolt in Cam... maybe with a few tweaks.  Not all that complicated really.

The trouble and expense of a complete  top end engine build should probably include a cam which is a little bigger than a bolt in seeing as though there are high comp pistons, zero decking, engine blue printing, head milling/ head work involved etc.. ?     I think this is where things got a little complicated (me confused).

but on a serious note l did really appreciate everybody's input, and learned a helluva lot even if it dragged out way too long for most people.  😂

R U kidding?
There is another top end rebuild on here somewhere that has been going on for months!
Truly it was great to see you get all the real comments.

Quote from: thumper 823 on April 25, 2020, 06:28:03 PM
R U kidding?
There is another top end rebuild on here somewhere that has been going on for months!
Truly it was great to see you get all the real comments.

Perhaps the subject TBO should be addressed here one more time . (time b4 overhaul)
Lots here talk about performance mods.
What is not mentioned is the shortened graph of components.
  I usually mentioned this somewhere (most the time all the time.)
Milage is linear to the mods.
We can not expect narrow seats at the top of the margin to go the same distance as 0.050 seats centered.
Simple.
  The old tried and true 8.5 CR stock everything will go easily twice as far as any moded bike with real performance  additions ( not counting flapper valve air cleaners)
(I love picking on that POS)

If it was me I would replace the plastic breather gear whilst there.
They warp, gather crap as it gets embedded in the plastic, and ruins the bore it spins in.

Quote from: Racepres on April 24, 2020, 07:56:02 AM

Quote from: hbkeith on April 24, 2020, 07:09:51 AM
of all the EVO,s ive had , a REAL ( not a $350 one )port job did more than anything

Not without the Cam and Intake and even Pipe that compliment it... BTDT

Yes , and of coarse that LOL

Quote from: thumper 823 on May 06, 2020, 09:16:17 AM
If it was me I would replace the plastic breather gear whilst there.
They warp, gather crap as it gets embedded in the plastic, and ruins the bore it spins in.

Yep, thanks.
Already have the S&S kit on the way 👍

Your stuff is on the way.

Quote from: thumper 823 on May 06, 2020, 05:00:34 PM
Your stuff is on the way.

Thanks man, appreciated  👌

Now you are a victim of pay it forward.

Quote from: thumper 823 on May 06, 2020, 06:45:45 PM
Now you are a victim of pay it forward.

LOVE paying it forward!  😉

Finally got around to starting the springer up. 3 heat cycles, lifters quiet during the 2nd heat cycle. Compression test this am cold cranking 180 PSI both cylinders. May ride it Saturday so customer can have it early next week.
John

Quote from: jsachs1 on May 07, 2020, 02:29:58 PM
Finally got around to starting the springer up. 3 heat cycles, lifters quiet during the 2nd heat cycle. Compression test this am cold cranking 180 PSI both cylinders. May ride it Saturday so customer can have it early next week.
John

Got to this way late, good stuff. I think all the good work depends on the way it's going to be run. I put a 46 in my FX Springer with Wiseco 10-1 and springs and Cometec .030 gaskets. It doesn't suit my riding style, I'm putting the 27 back in. It's not that the 46 didn't run, just the opposite, I just spent a lot of time outside of it's sweet spot as in it and I feel the 27 is better suited. They both run great at 85 , it's just how they get there.