B Series Inlet Port Shape & Flow - Honda-Tech

Combustion Contraption · 03-07-2007, 06:05 PM

I have here before me a PR3 head with a blown chamber that i decided i would use to benefit the Honda community. Im going to put a standard 30,45,60 VJ on the inlet side and try 3 different port shapes on each cylinder, all varying in characteristics. This experiement will address several issues i have seen brought up on this forum.

1. Sharpened port divider vs Radius'ed port divider.

2. Hacked Guide Bosses and Guides - how much CFM is it worth over a streamlined boss?

3. Stock Chamber vs. Modded Chamber flow gains?

4. Port entry modication - Worth any flow at all?

I am open to suggestions as for anything else you guys would like to see adressed. As far as the flow duties, it looks like it will be handled by Tom @ Portflow. I have access to another flowbench, but it is my former employer and id rather have someone who i am not associated with flow the head.

Is this something that everyone would like to see?

Combustion Contraption · 03-07-2007, 06:10 PM

Also, i just want to add , this will be a CFM comparison only. Which port flows the most air. That does not necessarily mean thats the best port shape for every setup. It means it has the most potential for HP, if everything else is optimized.

92TypeR · 03-07-2007, 06:33 PM

Good valve job w/o portwork VS no valvejob good portwork.

b20vtech · 03-07-2007, 06:53 PM

i would love to see this........

MotorSpecies ver1.6 · 03-07-2007, 07:21 PM

Quote:

Originally Posted by 92TypeR

Good valve job w/o portwork VS no valvejob good portwork.

interesting,I would like 2 know this one aswell

Aquafina · 03-07-2007, 07:42 PM

I wouldn't do it with that head. Since you're behind the times, I'll send you a Z6 head to do it on.

alterdcreations · 03-07-2007, 07:54 PM

or a f22a

:Josh: · 03-07-2007, 07:57 PM

Rip the short turn and epoxy up the roof around the guide boss.

MAX_CFM · 03-07-2007, 07:57 PM

I have all the test on my computer already done ..

alterdcreations · 03-07-2007, 08:25 PM

care to help us out alittle

Chillinit · 03-07-2007, 08:47 PM

Quote:

Originally Posted by alterdcreations

care to help us out alittle

X2

Professor15 · 03-07-2007, 08:51 PM

Quote:

Originally Posted by MAX_CFM

I have all the test on my computer already done ..

mind sharing then?

Phil M · 03-07-2007, 08:55 PM

Quote:

Originally Posted by MAX_CFM

I have all the test on my computer already done ..

Did you use a digital model and do a fluid test on it? Or did you just try everything and imput the data?

EnjoyTheRideDC2 · 03-08-2007, 12:27 AM

VERY interested in the findings/conlusions of such tests!...

Post up results please!

Combustion Contraption · 03-08-2007, 12:36 AM

Quote:

Originally Posted by MAX_CFM

I have all the test on my computer already done ..

You had time to do all those tests and input the data, but you cant respond to my PM's?

Oh well, these results will be made public, i like the idea of good VJ w no portwork. What constitutes a good VJ to people on here?

Combustion Contraption · 03-08-2007, 12:37 AM

Quote:

Originally Posted by :Josh:

Rip the short turn and epoxy up the roof around the guide boss.

Essentially doing away with the short turn and shifting the entire port down? The air still has to turn when it gets to the seat, and starting the turn before the seat is thought to be beneficial. Thats a good one too, though.

d15Beta · 03-08-2007, 01:00 AM

quite a few people know that the head is key to gaining the most in n/a

always want to learn!
im in for the results!

the VJ stock port vs, no VJ ,touched ports is a good idea...

GarageAlchemist · 03-08-2007, 01:50 AM

exactly what we need more of, talking about head porting theory, and all that is fine. yet actualy doing something is valued

drift4jesus · 03-08-2007, 04:00 AM

What will your seat width be for the 'standard 3angle'?

stock chamber vs what how modded of chamber?

Quote:

Originally Posted by Professor15

mind sharing then?

I am sure he does.

...for good reason too.

Not that would mind being wrong

1 2 NV · 03-08-2007, 05:36 AM

Quote:

Originally Posted by 92TypeR

Good valve job w/o portwork VS no valvejob good portwork.

dont do that everyone will get swamped with VJ orders.

Furyof4 · 03-08-2007, 06:00 AM

Subscribed

CC, I have b16 head that's missing cam caps if you want another head for the testing. Free if you want it, let me know.

pomansouth01 · 03-08-2007, 06:35 AM

haha, funny but true

Combustion Contraption · 03-08-2007, 06:37 AM

Quote:

Originally Posted by drift4jesus

What will your seat width be for the 'standard 3angle'?

stock chamber vs what how modded of chamber?

As far as the seat width, i was thinking of just doing the standard .040 (1mm) width.

Modded chamber, i just meant blending the sharp edges into the chamber.

Re: Brad's Testing, i completely understand why he doesnt post his results.

:Josh: · 03-08-2007, 07:26 AM

03-07-2007, 06:05 PM	#1
Combustion Contraption Senior Member Join Date: Jan 2003 Location: So Cal Posts: 8,535	B Series Inlet Port Shape & Flow I have here before me a PR3 head with a blown chamber that i decided i would use to benefit the Honda community. Im going to put a standard 30,45,60 VJ on the inlet side and try 3 different port shapes on each cylinder, all varying in characteristics. This experiement will address several issues i have seen brought up on this forum. 1. Sharpened port divider vs Radius'ed port divider. 2. Hacked Guide Bosses and Guides - how much CFM is it worth over a streamlined boss? 3. Stock Chamber vs. Modded Chamber flow gains? 4. Port entry modication - Worth any flow at all? I am open to suggestions as for anything else you guys would like to see adressed. As far as the flow duties, it looks like it will be handled by Tom @ Portflow. I have access to another flowbench, but it is my former employer and id rather have someone who i am not associated with flow the head. Is this something that everyone would like to see? __________________ EARL LASKEY, YOU WILL BE MISSED CCCylinderheads.com Check out the INDUCTION SPECIAL Matco Doublebay Toolbox FOR SALE Click Here!

03-07-2007, 06:10 PM	#2
Combustion Contraption Senior Member Join Date: Jan 2003 Location: So Cal Posts: 8,535	Also, i just want to add , this will be a CFM comparison only. Which port flows the most air. That does not necessarily mean thats the best port shape for every setup. It means it has the most potential for HP, if everything else is optimized. __________________ EARL LASKEY, YOU WILL BE MISSED CCCylinderheads.com Check out the INDUCTION SPECIAL Matco Doublebay Toolbox FOR SALE Click Here!

03-07-2007, 06:33 PM	#3
92TypeR FSAE Join Date: Jan 2002 Location: Starbucks, WA Posts: 4,456	Re: (Combustion Contraption) Good valve job w/o portwork VS no valvejob good portwork. __________________ 1997 ITR #110 -- 227whp/156tq 2.0L ITRspec.com

03-07-2007, 06:53 PM	#4
b20vtech Senior Member Join Date: Aug 2005 Location: OUTLAWZ PERFORMANCE, CA, usa Posts: 2,262	Re: B Series Inlet Port Shape & Flow (Combustion Contraption) i would love to see this........ __________________ vouch list: BMo Tuning, manoy WTB: ITR intake manifold, ITR/CTR cams, ITR cat-converter

03-07-2007, 07:42 PM	#6
Aquafina Senior Member Join Date: Jan 2003 Location: Johnson City TN Posts: 8,562	Re: B Series Inlet Port Shape & Flow (MotorSpecies ver1.6) I wouldn't do it with that head. Since you're behind the times, I'll send you a Z6 head to do it on. __________________ Whoopee Doo Racing: MFactory, Rocket Motorsports, Action Clutch, CP Pistons, Supertech, ACL.////ITR Expo Sponsor 2006-2008, Big Tuna Motorsports Sponsor 2008.////MFactory North American Installer

03-07-2007, 07:54 PM	#7
alterdcreations Senior Member Join Date: Feb 2006 Location: Single camshafting for now in, N.Y. Posts: 3,223	Re: B Series Inlet Port Shape & Flow (Aquafina) or a f22a __________________ http://images.honda-tech.com/set1/smile/emcocktl.gif http://images.honda-tech.com/set1/smile/emdgust.gif

03-07-2007, 07:57 PM	#8
:Josh: Member Join Date: Jan 2006 Location: Houston, TX, US Posts: 83	Re: B Series Inlet Port Shape & Flow (Aquafina) Rip the short turn and epoxy up the roof around the guide boss.

03-07-2007, 07:57 PM	#9
MAX_CFM Senior Member Join Date: Jan 2003 Location: Charlotte, NC, USA Posts: 1,004	I have all the test on my computer already done .. __________________ NEED TO CONTACT ME rlzengineering@yahoo.com

03-07-2007, 08:25 PM	#10
alterdcreations Senior Member Join Date: Feb 2006 Location: Single camshafting for now in, N.Y. Posts: 3,223	Re: (MAX_CFM) care to help us out alittle __________________ http://images.honda-tech.com/set1/smile/emcocktl.gif http://images.honda-tech.com/set1/smile/emdgust.gif

03-08-2007, 12:27 AM	#14
EnjoyTheRideDC2 Senior Member Join Date: Aug 2003 Location: Left Coast, High Altitude, Top Floor Posts: 5,596	Re: (theyoungone) VERY interested in the findings/conlusions of such tests!... Post up results please! __________________ DB Squad! - Member #1 (I still need to get the hang of this vBulletin mess.)

03-08-2007, 01:00 AM	#17
d15Beta Senior Member Join Date: May 2003 Location: r4, mars Posts: 950	quite a few people know that the head is key to gaining the most in n/a always want to learn! im in for the results! the VJ stock port vs, no VJ ,touched ports is a good idea... __________________ 0000000000000 *was a vtec'n now a revvin'*

03-08-2007, 01:50 AM	#18
GarageAlchemist * B A N N E D * Join Date: Jan 2006 Location: ma Posts: 0	Re: (acid-burn) exactly what we need more of, talking about head porting theory, and all that is fine. yet actualy doing something is valued

03-08-2007, 06:00 AM	#21
Furyof4 Senior Member Join Date: Nov 2003 Location: SE, PA, usa Posts: 902	Re: (1 2 NV) Subscribed CC, I have b16 head that's missing cam caps if you want another head for the testing. Free if you want it, let me know.

03-08-2007, 06:35 AM	#22
pomansouth01 Join Date: Apr 2004 Location: montgomery, alabama, united states Posts: 876	Re: (1 2 NV) haha, funny but true __________________ S&G Performance Revlimit@Bham Quote, originally posted by Combustion Contraption » I never have time to do it right the first time, but i always have time to do it right the second.

03-08-2007, 07:26 AM	#24
:Josh: Member Join Date: Jan 2006 Location: Houston, TX, US Posts: 83	Re: B Series Inlet Port Shape & Flow (Combustion Contraption)