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Author Topic: DYI Head Porting  (Read 19260 times)

Offline slatroni

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DYI Head Porting
« on: July 21, 2010, 06:48:06 PM »
Like most of the people on this sight, I like to do my own work. I got ahold of another stock head and I want to do a clean-up port job myself. Any tips or links that will help? I would kill to have one of the big name heads, but like everywere money is tight. I also got another set of stock cams to send out for regrind. How big can a regrind go?
 Thanks!
 Steve

All I need is 200hp! :vllgh:
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1397cc brocks 031 cams, APE valve springs, ported head, Muzzys 4-1 full system, PC3USB,4 short stacks, small air box mod, 40 shot of dry N2o. 3-7" extentions zzz chain. I only want to do 200 once........................

Offline jblankenship

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Re: DYI Head Porting
« Reply #1 on: July 21, 2010, 09:41:21 PM »
I did mine, knocked all the casting marks down along sides of the runners, up at the valve seat where the port comes to the valve seat area there is a large ridge, blend that. I knocked the small humps down by the valve guides, then I just smooth it down until the rough casting is smooth. I stay away from reshaping or hogging out. I do also port match the intake boots. I also took out the 3 ridges in the tbs this time. Some pics: 
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Offline jblankenship

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Re: DYI Head Porting
« Reply #2 on: July 21, 2010, 09:46:57 PM »
more
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Offline jblankenship

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Re: DYI Head Porting
« Reply #3 on: July 21, 2010, 09:48:45 PM »
another
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Offline jblankenship

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Re: DYI Head Porting
« Reply #4 on: July 21, 2010, 09:50:12 PM »
back from being milled(thanks Rc's Performance)
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Offline jblankenship

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Re: DYI Head Porting
« Reply #5 on: July 21, 2010, 09:52:14 PM »
combustion area cleaned and valve lapped back in
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Offline wildphil69

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Re: DYI Head Porting
« Reply #6 on: July 21, 2010, 09:55:53 PM »
looks like mine....did you weld the pair holes?
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Offline jblankenship

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Re: DYI Head Porting
« Reply #7 on: July 21, 2010, 09:56:54 PM »
some more
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Offline jblankenship

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Re: DYI Head Porting
« Reply #8 on: July 21, 2010, 09:57:42 PM »
last one
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Offline jblankenship

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Re: DYI Head Porting
« Reply #9 on: July 21, 2010, 10:00:13 PM »
Quote from: wildphil69 on July 21, 2010, 09:55:53 PM
looks like mine....did you weld the pair holes?

No, but this head made 203 hp on Rc's Performance dyno at 68" on 93 pump gas, head milled .010", 395/378 webs, Je 12.3:1 drop ins, counter balance gear removed. I'm 195 unsuited and been 8.85 at 153 on it.
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Offline jblankenship

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Re: DYI Head Porting
« Reply #10 on: July 21, 2010, 10:03:20 PM »
throttle bodies:
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Offline jblankenship

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Re: DYI Head Porting
« Reply #11 on: July 21, 2010, 10:06:56 PM »
another 1
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Offline jblankenship

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Re: DYI Head Porting
« Reply #12 on: July 21, 2010, 10:07:57 PM »
last
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Offline magus

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Re: DYI Head Porting
« Reply #13 on: July 22, 2010, 07:28:19 AM »
I got mine apart for rebuild now.  I plan on doing this soon also.
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Offline slatroni

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Re: DYI Head Porting
« Reply #14 on: July 22, 2010, 08:47:38 AM »
Nice work! Thanks for the Pics!
 Steve
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1397cc brocks 031 cams, APE valve springs, ported head, Muzzys 4-1 full system, PC3USB,4 short stacks, small air box mod, 40 shot of dry N2o. 3-7" extentions zzz chain. I only want to do 200 once........................

Offline Jonny Hotnuts

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Re: DYI Head Porting
« Reply #15 on: July 23, 2010, 12:12:31 AM »



Heres a few shots of my home porting job.
Made 440+ WHP and got my car to 214mph in 3 miles.

Heres what ya do:

Get a head that has been ported by someone else, the head can be good or bad. I have a head on my 1507 that I used ported by Terry Vance. Did not need to pull the reference head off the motor.
Get a snap gauge.
Using the snap gauge measure the port at different stages of depths.
Using a die grinder with carbide rasp (I use flame tip) make the ports on the new head exactly like reference head. Dont go deeper and match the port profile.

The key is using a pre ported head.
If I had needed a ported head I have some friends that would of let me borrow one or given me one that was destroyed beyond repair.


Once you port your own head and polish it you will find the money you would spend to have the job done will be money well spent.
BUT....

It can be done.

~JH
« Last Edit: July 23, 2010, 12:18:19 AM by Jonny Hotnuts »
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Garrett T28@7psi

Busa pwrd Bonneville car 208 mph+
2X world record holder
NA motor: 1507cc
Fastest 1.5L NA door slammer in the world

Offline Yngve

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Re: DYI Head Porting
« Reply #16 on: July 23, 2010, 12:43:15 AM »
Quote from: Jonny Hotnuts on July 23, 2010, 12:12:31 AM



Heres a few shots of my home porting job.
Made 440+ WHP and got my car to 214mph in 3 miles.

Heres what ya do:

Get a head that has been ported by someone else, the head can be good or bad. I have a head on my 1507 that I used ported by Terry Vance. Did not need to pull the reference head off the motor.
Get a snap gauge.
Using the snap gauge measure the port at different stages of depths.
Using a die grinder with carbide rasp (I use flame tip) make the ports on the new head exactly like reference head. Dont go deeper and match the port profile.

The key is using a pre ported head.
If I had needed a ported head I have some friends that would of let me borrow one or given me one that was destroyed beyond repair.


Once you port your own head and polish it you will find the money you would spend to have the job done will be money well spent.
BUT....

It can be done.

~JH


Didnt know that Terry Vance ported heads...

Byron Hines on the other hand.......
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Offline midnight black man

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Re: DYI Head Porting
« Reply #17 on: July 23, 2010, 07:09:45 AM »
a clients exhaust...hand porting...

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Offline slatroni

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Re: DYI Head Porting
« Reply #18 on: July 23, 2010, 10:25:59 AM »
Thanks for the pics midnight black man and Jonny Hotnuts! I cant wait till my head comes in!
 
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1397cc brocks 031 cams, APE valve springs, ported head, Muzzys 4-1 full system, PC3USB,4 short stacks, small air box mod, 40 shot of dry N2o. 3-7" extentions zzz chain. I only want to do 200 once........................

Offline gsx1300r_is4me

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Re: DYI Head Porting
« Reply #19 on: July 25, 2010, 10:19:23 AM »
Quote from: midnight black man on July 23, 2010, 07:09:45 AM
a clients exhaust...hand porting...




Now that's nice!!! :thumb:
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Offline slatroni

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Re: DYI Head Porting
« Reply #20 on: July 25, 2010, 05:40:04 PM »
That looks good!
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1397cc brocks 031 cams, APE valve springs, ported head, Muzzys 4-1 full system, PC3USB,4 short stacks, small air box mod, 40 shot of dry N2o. 3-7" extentions zzz chain. I only want to do 200 once........................

Offline mike46

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Re: DYI Head Porting
« Reply #21 on: July 31, 2010, 09:10:39 PM »
Quote from: midnight black man on July 23, 2010, 07:09:45 AM
a clients exhaust...hand porting...


Crossbuffs
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Offline midnight black man

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Re: DYI Head Porting
« Reply #22 on: August 01, 2010, 04:19:24 AM »
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Offline slatroni

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Re: DYI Head Porting
« Reply #23 on: August 01, 2010, 09:15:04 AM »
My electric die grinder and porting kit is on its way!  What kind of HP can I expect from a " clean-up and polish" port job? I am going to send out some cams for a .368 regrind also.
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1397cc brocks 031 cams, APE valve springs, ported head, Muzzys 4-1 full system, PC3USB,4 short stacks, small air box mod, 40 shot of dry N2o. 3-7" extentions zzz chain. I only want to do 200 once........................

Offline Jonny Hotnuts

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Re: DYI Head Porting
« Reply #24 on: August 01, 2010, 11:22:37 PM »
Quote
My electric die grinder and porting kit is on its way!  What kind of HP can I expect from a " clean-up and polish" port job? I am going to send out some cams for a .368 regrind also.

I suspect you will loose 2-3HP.

~JH
« Last Edit: August 01, 2010, 11:33:21 PM by Jonny Hotnuts »
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02 BL/BLK
Garrett T28@7psi

Busa pwrd Bonneville car 208 mph+
2X world record holder
NA motor: 1507cc
Fastest 1.5L NA door slammer in the world
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