C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Head Porting

Thread Tools
 
Search this Thread
 
Old 05-04-2010, 03:28 AM
  #1  
hdpete98
Pro
Thread Starter
 
hdpete98's Avatar
 
Member Since: Feb 2002
Location: Carlsbad CA
Posts: 702
Received 10 Likes on 7 Posts

Default Head Porting

Can anyone recommend a shop in southern california that can port heads for a gen 1 SBC?
Old 05-04-2010, 12:50 PM
  #2  
toddalin
Le Mans Master
 
toddalin's Avatar
 
Member Since: Oct 2000
Location: Santa Ana CA
Posts: 8,763
Received 1,159 Likes on 486 Posts

Default

Twenty-odd years ago Flow Technology did the heads on my '64 as well as the intake manifold, and their work is outstanding. At the time, the heads were $300 and included: cut and hog from 1.94/1.50 to 2.02/1.60, new valves and inserts, install hardened exhaust seats, pocket porting, 3-angle valve job, and gasket matching.

Was $25 to later gasket match a Performer RPM.

I believe that these were the guys, but check and see if it is still them (and don't count on these prices anymore).

http://www.manta.com/coms2/dnbcompany_j7bztz
Old 05-04-2010, 04:19 PM
  #3  
pauldana
Race Director
Support Corvetteforum!
 
pauldana's Avatar
 
Member Since: May 2003
Location: California
Posts: 10,677
Received 396 Likes on 306 Posts

Default

I had my heads done by Adams metelizing in Lancaster Ca, they were Sportsman II and the guy that ported them (Toby) said he can make them flow better than he can make Edelbrock RPM heads flow... I believe him... i have 436tq and over 440hp at the rear wheels on my 383.... there number is 661 942-9538 ask for Mark, and tell them Paul sent you... my heads were Ported, polished and portmatched... good luck... Paul
Old 05-04-2010, 09:07 PM
  #4  
Solid LT1
Le Mans Master
 
Solid LT1's Avatar
 
Member Since: Dec 2003
Location: Fremont CA
Posts: 5,727
Received 32 Likes on 27 Posts

Default

Funny this thread should come up, I'm getting ready to bolt these on to the 355 for my wife's 70 LT-1 Vette and NO the date codes don't match. I could have had a nice set of aluminum heads for the time and $$$ I have tied up in these but, they look right on an LT-1 motor


Old 05-04-2010, 09:16 PM
  #5  
Solid LT1
Le Mans Master
 
Solid LT1's Avatar
 
Member Since: Dec 2003
Location: Fremont CA
Posts: 5,727
Received 32 Likes on 27 Posts

Default

Combustion chambers still need a little work, then I'll have to finanlize the valve job (Sunnen VGS20 machine with carbide cutter), and then the fun job of equalizing combustion chamber volumes can begin (hope I don't break another 100cc burret while doing that job.)

The exhaust port roof is raised about 0.080-0.100" and should flow pretty well. These heads have been treated to hardened exhaust seats, Manley severe duty 2.05"int/1.60"ehx valves. Springs will be Comp Cams "beehive" with tool steel retainers which weigh about 2grams each more than a set of titanium retainers.



Old 05-04-2010, 09:34 PM
  #6  
DRIVESHAFT
Drifting
 
DRIVESHAFT's Avatar
 
Member Since: Aug 2005
Location: League City TX
Posts: 1,682
Received 2 Likes on 2 Posts

Default

You might try Dr J's in Anaheim. http://www.j-performance.com/index.p...d=16&Itemid=30
I havent had any personal dealings with him, but he seems to have a decent online reputation.
Old 05-04-2010, 09:38 PM
  #7  
Solid LT1
Le Mans Master
 
Solid LT1's Avatar
 
Member Since: Dec 2003
Location: Fremont CA
Posts: 5,727
Received 32 Likes on 27 Posts

Default

You could UPS them to Nor-Cal to Amaral's Engine Parts & Machine 45405 Industrial Place Unit#1 Fremont, CA 94538

(510) 656-9352 ask for Dan, tell him Eric sent you
Old 05-04-2010, 10:29 PM
  #8  
427Hotrod
Race Director
 
427Hotrod's Avatar
 
Member Since: Jan 2000
Location: Corsicana, Tx
Posts: 12,603
Received 1,874 Likes on 912 Posts
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist

Default

Unless you're just married to them for numbers or something...you might get some pricing and then look into buying a set of CNC heads. There is great stuff available out there!

JIM
Old 05-04-2010, 10:36 PM
  #9  
lars
Tech Contributor
Support Corvetteforum!
 
lars's Avatar
 
Member Since: Aug 1999
Location: At my Bar drinking and wrenching in Lafayette Colorado
Posts: 13,652
Received 4,920 Likes on 1,929 Posts

Default


For the cost of paying somebody who knows what they're doing to fully port and build your heads, you can buy a really nice set of heads that don't need any porting to flow the same or better. For the cheap cost of paying somebody who doesn't know what they're doing, you can get yourself a pair of trashed heads that flow worse than stock, and then you can buy yourself a really nice set of heads to replace them.

Unless you want the car to appear stock, or you're running it in a class requiring the use of stock castings, there is little financial advantage to porting, unless you're doing it yourself, you know what you're doing, and your time has no value.

Lars
Old 05-04-2010, 11:06 PM
  #10  
Solid LT1
Le Mans Master
 
Solid LT1's Avatar
 
Member Since: Dec 2003
Location: Fremont CA
Posts: 5,727
Received 32 Likes on 27 Posts

Default

Originally Posted by lars

For the cost of paying somebody who knows what they're doing to fully port and build your heads, you can buy a really nice set of heads that don't need any porting to flow the same or better. For the cheap cost of paying somebody who doesn't know what they're doing, you can get yourself a pair of trashed heads that flow worse than stock, and then you can buy yourself a really nice set of heads to replace them.

Unless you want the car to appear stock, or you're running it in a class requiring the use of stock castings, there is little financial advantage to porting, unless you're doing it yourself, you know what you're doing, and your time has no value.

Lars
Yes I could put a set of (insert name here) heads on it for less money but, because the Vette is a LT-1 car, I want the "camel humps" on the heads. I have an advantage on most people, I have access to an automotive machine shop/equipment 24hrs a day 7 days a week. I realize my time has little value but, I like being able to tell people my wife's 70 LT-1 is "pretty much stock" after making a 12 second pass down the strip:

PRICELESS!

Last edited by Solid LT1; 05-04-2010 at 11:08 PM.
Old 05-05-2010, 08:35 PM
  #11  
cardo0
Le Mans Master
 
cardo0's Avatar
 
Member Since: Oct 2002
Location: Las Vegas - Just stop perpetuating myths please.
Posts: 7,098
Received 373 Likes on 356 Posts

Default Ask around at Barona or Cal Speedway drag strips.

Originally Posted by hdpete98
Can anyone recommend a shop in southern california that can port heads for a gen 1 SBC?

I've seen some fast cars with head work done by Spring Valley auto machine but can't find thier listing now - maybe out of business.
Best way i know of is to go the drag strip and ask the guys with the faster cars who does thier machine work.
Not local but great prices on head work: Performance Chevy Products, 2995 W Whitton Ave, Phoenix, AZ 85017, (602) 254-9586.

What kind's heads? Most stock type iron Chevy heads respond very well to just a cheap $200 pocket port with a 3 angle vlv job - Performance Chevy Products will pocket port, unshroud vlvs,, and 3 angle for less. (Try an 0.015" steel shim gasket too.) Something like 2/3 the gain of a full port job maybe. Well it depends on the head also. Vortec heads don't inprove much from a pocket port if at all - they need bigger valves, vlv unshrouding and bowl work around the guide - $$$$.

Hope this helps ya,
cardo0
Old 05-05-2010, 08:55 PM
  #12  
SanDiegoPaul
Race Director
Support Corvetteforum!
 
SanDiegoPaul's Avatar
 
Member Since: Sep 2002
Location: San Diego - Deep Within The State of CONFUSION!
Posts: 10,362
Likes: 0
Received 2 Likes on 2 Posts
Default

When I first built my motor, the heads were done at Total Performance in Santee. They lasted five years and 20K miles before busting a spring and being replaced by AFR 195's

Wanna buy some ported & polished cast heads with a bad spring?
Old 05-05-2010, 08:56 PM
  #13  
SanDiegoPaul
Race Director
Support Corvetteforum!
 
SanDiegoPaul's Avatar
 
Member Since: Sep 2002
Location: San Diego - Deep Within The State of CONFUSION!
Posts: 10,362
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by lars

Unless you want the car to appear stock, or you're running it in a class requiring the use of stock castings, there is little financial advantage to porting, unless you're doing it yourself, you know what you're doing, and your time has no value.

Lars
I agree with Lars completely. I didn't buy good heads when I built the motor and had to in later and fix it.

Get notified of new replies

To Head Porting




Quick Reply: Head Porting



All times are GMT -4. The time now is 10:04 PM.