porting a head DYI, need some direction |
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porting a head DYI, need some direction |
02loftsmoor |
Aug 20 2014, 06:03 PM
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#1
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
I'm following a guideline that Ray posted a while back on using 1.7 heads, opening up the exhaust valve to a 1.8 exhaust valve..and the port the hell out of the exhaust port. relocate the spark plug.
I need some guidance , pictures, measurements anything that could help me DYI port these heads. and I will say please and thank you, and will buy a beverage of your choice. (IMG:style_emoticons/default/beerchug.gif) |
Cap'n Krusty |
Aug 20 2014, 07:07 PM
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#2
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Using your flow bench, determine the flow. Calculate the most effective flow rate for your C/R, camshaft, displacement, and intake/exhaust systems. Again using your flow bench to determine the changes as you go, remove material from the appropriate places until the desired port profile and flow rate are achieved for the RPM range you plan to use. It's that simple ......................
The Cap'n |
Jacob |
Aug 20 2014, 07:19 PM
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#3
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Member Group: Members Posts: 131 Joined: 12-February 08 From: Mansfield, Oh Member No.: 8,705 Region Association: Upper MidWest |
Here is a site that tells you how to build a flow bench using a shop vac.
http://www.diyporting.com/flowbench.html and here is a guy that produced a series of videos on how to build one. https://www.youtube.com/watch?v=RNuVOB4-HuA |
02loftsmoor |
Aug 20 2014, 08:27 PM
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#4
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
Cap'n your killing me, I'm just a poor service manger that has never built a T4, is there a simpler way? not wanting to build a fire breather on my first build.. I've been known to grenade an engine or two.
but that shop vac flow bench is cool Using your flow bench, determine the flow. Calculate the most effective flow rate for your C/R, camshaft, displacement, and intake/exhaust systems. Again using your flow bench to determine the changes as you go, remove material from the appropriate places until the desired port profile and flow rate are achieved for the RPM range you plan to use. It's that simple ...................... The Cap'n |
0396 |
Aug 20 2014, 08:36 PM
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#5
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Advanced Member Group: Members Posts: 2,046 Joined: 13-October 03 From: L.A. Calif Member No.: 1,245 Region Association: Southern California |
Cap'n your killing me, I'm just a poor service manger that has never built a T4, is there a simpler way? not wanting to build a fire breather on my first build.. I've been known to grenade an engine or two. but that shop vac flow bench is cool Using your flow bench, determine the flow. Calculate the most effective flow rate for your C/R, camshaft, displacement, and intake/exhaust systems. Again using your flow bench to determine the changes as you go, remove material from the appropriate places until the desired port profile and flow rate are achieved for the RPM range you plan to use. It's that simple ...................... The Cap'n Some procedures are better left to the professional. |
02loftsmoor |
Aug 20 2014, 08:43 PM
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#6
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
did you see what they want to do a port/polish,, OMG,, thats why i asked,, my MG's you could make a jig and you had to be careful of the water jacket . I'm looking for some sort of guild line to stay out of trouble..
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messix |
Aug 20 2014, 08:49 PM
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#7
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AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
some simple things are port match to intake and exhaust manifolds, remove casting flash, smooth valve bowl before valve seats install then smooth transition to valve seat.
a stock size street engine wont need/benefit from much extensive work. |
messix |
Aug 20 2014, 08:51 PM
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#8
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AKA "CLUTCH KILLER"! Group: Members Posts: 6,995 Joined: 14-April 05 From: between shit kickers and pinky lifters/ puget sound wa.north of Seattle south of Canada Member No.: 3,931 Region Association: Pacific Northwest |
did you see what they want to do a port/polish,, OMG,, thats why i asked,, my MG's you could make a jig and you had to be careful of the water jacket . I'm looking for some sort of guild line to stay out of trouble.. no water jackets to worry about on a T4... but take too much out and you run into cracking problems. |
02loftsmoor |
Aug 20 2014, 08:54 PM
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#9
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
I have the bits to build 2056, correct me if I'm wrong on the displacement, needing advice on a cam. I have a set of Weber 40s.
I would like to keep the RPMs lower, Im wanting torque mid range punch |
r_towle |
Aug 20 2014, 08:55 PM
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#10
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Custom Member Group: Members Posts: 24,635 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
It's a weird shape in there so you cannot measure it with conventional tools.
A flow bench, homemade is really the best way to make sure you are doing the same thing to all four ports... He may sound a bit sarcastic, but he is right on this one. Read the shop design....build one of those. |
02loftsmoor |
Aug 20 2014, 09:00 PM
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#11
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
my EST for European motor sports
Attached File(s) Quote___m855.PDF ( 8.31k ) Number of downloads: 128 |
02loftsmoor |
Aug 20 2014, 09:01 PM
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#12
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
The Capt'n is a good guy, just a salty dog!!
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smokum |
Aug 20 2014, 09:15 PM
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#13
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Newbie Group: Members Posts: 4 Joined: 20-August 14 From: castro valley Member No.: 17,803 Region Association: None |
to say Shapping and porting is simple, is no diff than saying rebuilding a engine is simple. its just not true. IT is a science i did not have the time or space to do a flow bench properly so i found an engine builder that was willing to work with me as i made changes to my heads. I would grind and he would flow. it showed me were i made mistakes and gains.
David Vizard is the god of head porting he wrote the book! or books on it. all our engines are the same internally let no one tell you differnt. http://www.popularhotrodding.com/tech/0610...r_head_porting/ http://www.popularhotrodding.com/enginemas...cylinder_heads/ |
jasons |
Aug 20 2014, 09:49 PM
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#14
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Jackstand Extraordinaire Group: Members Posts: 2,002 Joined: 19-August 04 From: Scottsdale, AZ Member No.: 2,573 Region Association: None |
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bdstone914 |
Aug 20 2014, 10:14 PM
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#15
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bdstone914 Group: Members Posts: 4,688 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
I have a set if 2.0 heads that I just pulled off an engine today. I would sell them for $ 450 for the pair. You would just need a standard rebuild. I can get them blasted and inspected for damage if you are interested. You can expect to replace exhaust guides. I also have the cylinder tins.
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02loftsmoor |
Aug 21 2014, 08:28 PM
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#16
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
I have a set if 2.0 heads that I just pulled off an engine today. I would sell them for $ 450 for the pair. You would just need a standard rebuild. I can get them blasted and inspected for damage if you are interested. You can expect to replace exhaust guides. I also have the cylinder tins. bstone914 thanks for the offer i have a set of 2.0 heads, according to Raybe the 1.7 heads were the way to go, with a few mods. the most relilable |
Jake Raby |
Aug 21 2014, 09:08 PM
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#17
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Engine Surgeon Group: Members Posts: 9,398 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Wow.
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draganc |
Aug 21 2014, 09:39 PM
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#18
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Senior Member Group: Members Posts: 725 Joined: 2-November 09 From: central new jersey Member No.: 11,000 Region Association: North East States |
Wow. Since you don't focus on T4 kits anymore, how about you share 5% of your knowledge. Remember Kindergarden, sharing is nice. (IMG:style_emoticons/default/biggrin.gif) |
02loftsmoor |
Aug 21 2014, 10:22 PM
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#19
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
tell us the skinny Ray
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02loftsmoor |
Aug 21 2014, 10:25 PM
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#20
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Senior Member Group: Members Posts: 577 Joined: 26-June 11 From: Ft. Worth TX Member No.: 13,243 Region Association: Southwest Region |
Sorry "Jake ""
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