I am building a drag/street motor using a 2806830-10 block and a 3698447-4 head because that is the head I have. I noticed on the exhaust valve pockets there is a small dimple. My question is what is this dimple for and also is this a good head to use for a performance build? I will be putting this motor in a 63 Valiant and looking to run 13's on the bottle.

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Raymond Flynn
Registered Six Offender!!!!

Look in this section..."Slant six head and the revised combustion chamber"
should answer some of your questions....'63 Valiants are cool! nico

Air injection for emissions. I ported a head recently. I just smoothed it really nice.

Stupid place to put it. I think it is bad for flow. In a mild motor it probably wouldn't be noticable. I think Slantzilla runs those style heads


CRap! you said combustion chamber!

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

After reading the article I believe I have a good head to start with. I am going to try to do all of the porting work myself and see what happens. If anyone has done there own work before I could use a little advice on how much to take off? I have seen pics of the pocket porting work and that will not be a problem I am somewhat nervous though about taking to much out of the ports.

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Raymond Flynn
Registered Six Offender!!!!

Caution! There's water in those ports. Clean up the flash, and be careful! You can hit water real quick without some serious care.

What's your goal here? A street strip engine will do fine with just cleaning things up. Trying to increase port volume isn't going to net gains where this engine lives, and you can make your head into a paper weight real quick!

CJ

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Part of Tyrde-Browne Racing

There is no way to PM you. I took some pics of the head I did a couple of months ago. I can email them to anyone that wants them I have before and after pics.

I think I can find them! I still haven't learned how to post here.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

I would love to see the photos my e mail address is americanwplumbing@gmail.com

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Raymond Flynn
Registered Six Offender!!!!

Article by Doug Dutra:

Check Doug Dutra, AKA Doctor Dodge:

porting pics

porting

more Doc with pictures here

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

you've got mail

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

Thank you wjajr for the links and thank you Rug_Trucker for the photos you sent they will help a lot as will all the info that you guys have given me. I will post some pics of before and after when I am done. I hope I do not end up with a paper weight, I will do all of the work before I get it milled so I do not waste my money.

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Raymond Flynn
Registered Six Offender!!!!