| Author |
Message |
MitchS046
Samba Member
Joined: March 02, 2020
Posts: 114
Location: Holland
|
 Posted: Sun Aug 09, 2020 12:17 pm Post subject: head porting do and don'ts |
 |
|
buying a pair of 94mm cb Panchito 044 and was wondering if they need porting for a pair of 44idf.
should I do it myself? or get someone else to do it?
Does anyone know a good porter in the neighborhood of Holland (rest of Europe is also somewhat possible)
if DIY what should I use? air die grinder? Dremel tool? hand drill?
what bits should be used? carbine? tungsten? flap wheel?
till what grit should it be polished?
what should you target more btw CFM or air velocity?
Is there something different of porting for EFI? (because of the spray patterns)
are there differences between N/A or boosted application?
sorry kind of a long post but porting is really new to me but am willing to learn
_________________
Slow is smooth, smooth is fast,
~ mark divine |
|
| Back to top |
|
 |
sled
Samba Member
Joined: February 16, 2005
Posts: 6179
|
| Posted: Sun Aug 09, 2020 12:54 pm Post subject: Re: head porting do and don'ts |
|
|
| MitchS046 wrote: |
buying a pair of 94mm cb Panchito 044 and was wondering if they need porting for a pair of 44idf.
should I do it myself? or get someone else to do it? |
NO, Panchitos have excellent ports as-is. A couple people have slightly touched the exhaust ports, but even that is not necessary.
order the heads with CNC cut chambers and then CC'd to your desired compression ratio.
as-cast IDF manifolds will work out of the box
if you need more flow than the panchitos can offer, then buy a different head.
_________________
drive your split. |
|
| Back to top |
|
|
mark tucker
Samba Member
Joined: April 08, 2009
Posts: 23937
Location: SHALIMAR ,FLORIDA
|
| Posted: Sun Aug 09, 2020 6:36 pm Post subject: Re: head porting do and don'ts |
|
|
| sled wrote: |
| MitchS046 wrote: |
buying a pair of 94mm cb Panchito 044 and was wondering if they need porting for a pair of 44idf.
should I do it myself? or get someone else to do it? |
NO, Panchitos have excellent ports as-is. A couple people have slightly touched the exhaust ports, but even that is not necessary.
order the heads with CNC cut chambers and then CC'd to your desired compression ratio.
as-cast IDF manifolds will work out of the box if you need more flow than the panchitos can offr, then buy a different head. |
I agree, and also tit retainers upgrade. a little pocket blending may be needed/help.but they are a exelent as cast head. if you are not a head porter that knows whats what and what to do and not to do do not mess with them. Ive seen lots of good castings effed up by clueless head porters. |
|
| Back to top |
|
|
67 Sunroof
Samba Member
Joined: February 22, 2014
Posts: 1836
Location: Salisbury, MD
|
| Posted: Sun Aug 09, 2020 6:56 pm Post subject: Re: head porting do and don'ts |
|
|
Tit retainers?? Hell yeah!
_________________
1776cc, CB crank, CB 2241 cam, CB light lifters, CB H-beam rods, CB light flywheel, Mahle forged pistons, A1 Sidewinder exhaust, Dellorto drla 40’s, Hoover modded case, fully balanced, fully flowed, heads by www.type-emotorsports.com, Air ride suspension by https://www.airkewld.com/?Click=3989 |
|
| Back to top |
|
|
sled
Samba Member
Joined: February 16, 2005
Posts: 6179
|
| Posted: Sun Aug 09, 2020 8:11 pm Post subject: Re: head porting do and don'ts |
|
|
| 67 Sunroof wrote: |
| Tit retainers?? Hell yeah! |
I dunno, I prefer when tits are NOT retained...but thats just me 
_________________
drive your split. |
|
| Back to top |
|
|
SBD
Samba Member
Joined: October 24, 2012
Posts: 3269
Location: SOUTH DAKOTA
|
| Posted: Mon Aug 10, 2020 10:54 am Post subject: Re: head porting do and don'ts |
|
|
| sled wrote: |
| 67 Sunroof wrote: |
| Tit retainers?? Hell yeah! |
I dunno, I prefer when tits are NOT retained...but thats just me |
For me it kinda' depends on who is doing the retaining. 
_________________
"Just $99 down and $64 a month for 36 months buys you a brand new Volkswagen Beetle!"
| mark tucker wrote: |
| I wouldent waste $ or thyme on building a small motor. build it big so it dosent have to work hard.remember it's only as fast as your foot alows it to be unless you build a small turd then it just stinks as it squishes up through your toes when you step on it. |
|
|
| Back to top |
|
|
DerrickfromNC1
Samba Member
Joined: October 24, 2008
Posts: 1302
Location: North Carolina
|
| Posted: Mon Aug 10, 2020 12:10 pm Post subject: Re: head porting do and don'ts |
|
|
What size engine are you building? If you look at the turnkey engines on CBPerf website they are using the Panchito heads on engines as large as 2387 and getting hp in the 180s. Assuming these are the same off the shelf Panchitos that you and I can buy w/o additional porting and upsized valves tells you what these heads are capable of!
I was planning to purchase mini wedges later this year for my 2332 weekend driver but have since decided on the CNC Panchitos.
Might change my mind based on what the all new MOFOCO 050s look like if they are available when I’m ready to pull the trigger. |
|
| Back to top |
|
|
[email protected]
Samba Member
Joined: August 15, 2002
Posts: 4394
Location: Brew City
|
| Posted: Mon Aug 10, 2020 12:17 pm Post subject: Re: head porting do and don'ts |
|
|
| MitchS046 wrote: |
buying a pair of 94mm cb Panchito 044 and was wondering if they need porting for a pair of 44idf.
should I do it myself? or get someone else to do it?
Does anyone know a good porter in the neighborhood of Holland (rest of Europe is also somewhat possible)
if DIY what should I use? air die grinder? Dremel tool? hand drill?
what bits should be used? carbine? tungsten? flap wheel?
till what grit should it be polished?
what should you target more btw CFM or air velocity?
Is there something different of porting for EFI? (because of the spray patterns)
are there differences between N/A or boosted application?
sorry kind of a long post but porting is really new to me but am willing to learn |
I would NOT touch those ports. One, they are good as they are. Two, the port walls are thin and for a first time porter, it would be very easy to grind through the port wall and ruin the head.
_________________
Please "LIKE" us on facebook to see what we are working on.
https://www.facebook.com/mofoco?ref=ts&fref=ts
www.mofoco.com
Cylinder Head Reference Sheet |
|
| Back to top |
|
|
MitchS046
Samba Member
Joined: March 02, 2020
Posts: 114
Location: Holland
|
| Posted: Mon Aug 10, 2020 1:55 pm Post subject: Re: head porting do and don'ts |
|
|
| DerrickfromNC1 wrote: |
| What size engine are you building? |
1915 94x69 but was hoping for around 130/150 hp with efi and cranktrigger ignition. Should i stay with the panchito’s for that or should i go with a pair of 044 magnums? Or perhaps something completely different. Would love to use a pair of JPM MS230 but not willing to spend the whole budget on just a pair of heads
_________________
Slow is smooth, smooth is fast,
~ mark divine |
|
| Back to top |
|
|
jeffrey8164 
Samba Member
Joined: January 06, 2018
Posts: 3818
Location: Georgia
|
| Posted: Mon Aug 10, 2020 2:48 pm Post subject: Re: head porting do and don'ts |
|
|
Trust in the Panchitos and live your life.
_________________
Volkswagen!
Turning owners into mechanics since 1938.
“Let he that is without oil throw the first rod”
(Compression 8.7:1) |
|
| Back to top |
|
|
Brian_e
Samba Member
Joined: July 28, 2009
Posts: 3293
Location: Rapid City, SD
|
| Posted: Mon Aug 10, 2020 3:21 pm Post subject: Re: head porting do and don'ts |
|
|
How high are you honestly planning to rev this engine?
Always use the smallest valve that will allow the displacement to reach its intended RPM.
Using too big of a valve will slow down airspeed and make the bottom end soggy.
Brian
_________________
www.type-emotorsports.com |
|
| Back to top |
|
|
|
