headwork aka port & polishing info - Page 4 - BMW S1000RR Forums: BMW Sportbike Forum
Go Back   BMW S1000RR Forums: BMW Sportbike Forum > General BMW S1000RR Discussions > S1000RR/HP4 Tech and Performance Chat


» Insurance
» Sponsors
Reply
 
LinkBack Thread Tools Display Modes
Old 11-03-2012, 05:50 AM   #31 (permalink)
Member
 
Join Date: Jul 2011
Posts: 90
Default

I just want to see a pump gas dyno run..mr12 is nice but hard to compare gains as its a power adder its self
BryGuy900 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-03-2012, 10:57 AM   #32 (permalink)
Senior Member
 
bsinclair's Avatar
 
Join Date: Dec 2009
Location: evansville indiana
Posts: 584
Garage
Default

Quote:
Originally Posted by kismetcapitan View Post
I'm fairly certain BMW was running over 15,000rpm on their WSBK bikes. Have no idea if they were using different valve springs or cams, but I'd guess yes?
they have ported heads,larger cams,valvesprings,retainers,rods, over 14:1 compression pistons and a unobtainable ecu...nothing stock in those motors...

as far as brock having a happy dyno i guess the other dynojet 250's ive been on in different states is happy also as they read within a few hp of each other.

Last edited by bsinclair; 11-03-2012 at 11:02 AM.
bsinclair is offline   Reply With Quote
Old 11-03-2012, 11:35 AM   #33 (permalink)
Senior Member
 
Join Date: Jul 2010
Location: The Valley, CA
Posts: 1,452
Send a message via AIM to G-force
Default

Quote:
Originally Posted by bsinclair View Post
thought i would give a update.. here is what the head flowed..
We gained 10%@ .05 valve lift which should be good for 5-7hp over stock ports..
7@.1
7@.15
7@.2
10@.25
10@.3
15@.35
19@.4
are those percentage gains or what?
__________________
'13 grey S1000RR
G-force is offline   Reply With Quote
Old 11-03-2012, 11:58 AM   #34 (permalink)
Senior Member

 
George Villar's Avatar
 
Join Date: Sep 2012
Location: New York City
Posts: 505
Default cylinder head flow

When you post flow-bench numbers for the ported heads, the normal (and I know this because I own a Superflow bench and have 20+ years experience), you record the baseline that the intake port flows at a certain degree cam lift, then record the the new (ported) intake runner results next to the baseline for comparison. When I used to port heads, I used to experiment with a few shapes and cast them in rubber. This meant that we would go through 2-3 sets of heads to test the different shapes - not the port size - the shape is what flows better as we all know. I'm curious to know why you choose to grind away the valve guide completely instead of knife-edging it so that if you opt for a larger set of cams at 14,000+ rpm - the valve stems would remain stable. Was there a reason?

Thanks

George Villar
__________________
George Villar
alphaPerformance USA

2013 BMW HP4 #555 (HP4 Superbuild)
2011 BMW S1000rr WSSK Racebike
2010 BMW S1000rr AMA Spec Racebike

http://www.alpha-bmw.com

https://www.facebook.com/alphabmw

https://www.facebook.com/george.villar
George Villar is offline   Reply With Quote
Old 11-03-2012, 01:09 PM   #35 (permalink)
Senior Member
 
bsinclair's Avatar
 
Join Date: Dec 2009
Location: evansville indiana
Posts: 584
Garage
Default

Quote:
Originally Posted by George Villar View Post
When you post flow-bench numbers for the ported heads, the normal (and I know this because I own a Superflow bench and have 20+ years experience), you record the baseline that the intake port flows at a certain degree cam lift, then record the the new (ported) intake runner results next to the baseline for comparison. When I used to port heads, I used to experiment with a few shapes and cast them in rubber. This meant that we would go through 2-3 sets of heads to test the different shapes - not the port size - the shape is what flows better as we all know. I'm curious to know why you choose to grind away the valve guide completely instead of knife-edging it so that if you opt for a larger set of cams at 14,000+ rpm - the valve stems would remain stable. Was there a reason?

Thanks

George Villar
george, i dont question bill's work as he's been knocking out some of the fastest bikes in this area. head porting is something i've never tried or want to do. the heads that carpenter and kws did look the same so i guess knife edging is not nesasary ...i will ask his theories on why he does it though and report back. the pictures you see are of a unfinished head. i will post of some of the finished pics when its done..
bsinclair is offline   Reply With Quote
Old 11-03-2012, 03:22 PM   #36 (permalink)
Junior Member
 
VanDahl's Avatar
 
Join Date: Sep 2010
Location: Estonia
Posts: 29
Default

Quote:
Originally Posted by BryGuy900 View Post
Ya i had talked with bill at port tech before to see if had done any s1000rr heads..at the time he had not seen one.. Very nice guy to talk with..btw would you know what stock cam timing numbers are? Would you be willing to give out some suggested timing numbers? I know most people like to keep them secret but i would at least like to know what the stock timing numbers are
Found this site:Specifications: 2010 BMW S1000RR
Is this the best choice(set with the tool) or might there be a benefit in slight degree change?
VanDahl is offline   Reply With Quote
Old 11-03-2012, 03:38 PM   #37 (permalink)
Senior Member
 
Join Date: Apr 2010
Posts: 469
Default

Quote:
Originally Posted by George Villar View Post
When you post flow-bench numbers for the ported heads, the normal (and I know this because I own a Superflow bench and have 20+ years experience), you record the baseline that the intake port flows at a certain degree cam lift, then record the the new (ported) intake runner results next to the baseline for comparison. When I used to port heads, I used to experiment with a few shapes and cast them in rubber. This meant that we would go through 2-3 sets of heads to test the different shapes - not the port size - the shape is what flows better as we all know. I'm curious to know why you choose to grind away the valve guide completely instead of knife-edging it so that if you opt for a larger set of cams at 14,000+ rpm - the valve stems would remain stable. Was there a reason?

Thanks

George Villar
George, in this day and age, you can open the port as far as you want to and then add epoxy in subsequent versions and test various configurations. You'll end up with a series of motors designed for different tracks.

The reality is that it's not about the most power but the best curve, and it's different for each track. Examples might be Miller and Daytona, wide open, Barber, restricted and shaped a bit.

Either way, it's the same initial head porting job.

Anyway, I'm not sure any of this matters in amateur hands these days, what's much more important is proper injector timing because the different fuel choices have such a big vaporization range. With most modern motorcycles way out of optimal injector timing on stock or kit ECU's, proper flow isn't going to help much.

Sort of the small end of a bigger problem I think.
dagor6 is offline   Reply With Quote
Old 11-03-2012, 03:43 PM   #38 (permalink)
Member
 
Join Date: Jul 2011
Posts: 90
Default

Ya i have seen that before..problem is the valve lift is measured at 3.0 mm which really it not a problem but there is not something not right with those numbers.
BryGuy900 is offline   Reply With Quote
Old 11-03-2012, 06:12 PM   #39 (permalink)
Senior Member

 
George Villar's Avatar
 
Join Date: Sep 2012
Location: New York City
Posts: 505
Default Photos

Thank you, I would love to see what the final porting job photos look like. Also, if you could post the baseline and ported flow-bench numbers (they usually get printed out like a dyno sheet), that would be perfect.

George Villar
__________________
George Villar
alphaPerformance USA

2013 BMW HP4 #555 (HP4 Superbuild)
2011 BMW S1000rr WSSK Racebike
2010 BMW S1000rr AMA Spec Racebike

http://www.alpha-bmw.com

https://www.facebook.com/alphabmw

https://www.facebook.com/george.villar
George Villar is offline   Reply With Quote
Old 11-03-2012, 07:26 PM   #40 (permalink)
Senior Member
 
bsinclair's Avatar
 
Join Date: Dec 2009
Location: evansville indiana
Posts: 584
Garage
Default

Quote:
Originally Posted by George Villar View Post
Thank you, I would love to see what the final porting job photos look like. Also, if you could post the baseline and ported flow-bench numbers (they usually get printed out like a dyno sheet), that would be perfect.

George Villar
i dont have a printout but here are the numbers...

lift stock ported
.05 26.95 36.26
.1 64.14 71.20
.15 99.50 106.50
.2 137.30 144.30
.25 170.15 180.10
.3 199.00 209.40
.35 220.00 235.00
.4 229.00 248.00

this was done on a superflow SF300 at 28" of depression
Attached Thumbnails
Click image for larger version

Name:	bmwsuperflowpic.jpg
Views:	295
Size:	85.3 KB
ID:	10446  
bsinclair is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

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 On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 04:41 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
© S1000RRforum.com
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