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Post by 1ol74charger4me on Feb 11, 2016 9:46:13 GMT -5
You can do that too. It has been shown that there is a pretty big power gain in doing that. I have a spec somewhere in my notes if you need that.
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Post by pouria on Feb 11, 2016 16:17:47 GMT -5
Yes, I need it. Kindly share any useful data with me that may lead me to the better result.
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Post by 1ol74charger4me on Feb 11, 2016 23:21:25 GMT -5
After they cut the 45 degree cut on the valve itself then the valve should be backcut with a 30 degree cut that is .070-.090 inch wide. If you can, do it to both intake and exhaust and it is supposed to really increase the flow. It should help it flow more like a 2:02 intake with out the cost of the valve.
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Post by pouria on Feb 14, 2016 0:29:24 GMT -5
Thanks for the info, I will forward all these to the machinist and ask him for a precise job. Meanwhile, I got a set of head gaskets, Rol HG31030! It reads "No Retorque Head Gaskets" on it and that's why I preferred them to those Mopar ones. Below is the picture: Do you know Rol gaskets? Are they good enough?
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DynoDave
CO-ADMINISTRATOR
Motown Mopar-Wizard
Posts: 11,160
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Post by DynoDave on Feb 15, 2016 1:27:09 GMT -5
Yes, a well known brand, and of good quality as far as I know.
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Post by 1ol74charger4me on Feb 15, 2016 10:54:48 GMT -5
Those should be ok.It is a coated non retorque type that is reputed to "squish" more than a felpro gasket which would give you a little more compression. If I had them I would use them. They aren't available anymore. Actually any gasket should be ok as long as the machine work is performed adequately. If your heads have been worked over before, you might get the machinist to check their thickness in case they have been surfaced quite a bit and that could give you a problem with the intake not matching up. A good machinist should be able to surface your intake to compensate for the difference if needed. Are you using a intake gasket that blocks off the exhaust port that heats the carb? If not you may want to consider getting your machinist to fill it. I saw where one guy melted a piston and poured the holes full.
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Feb 15, 2016 12:31:42 GMT -5
The engine information in this thread is outstanding.
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Post by pouria on Feb 15, 2016 17:23:00 GMT -5
Those should be ok.It is a coated non retorque type that is reputed to "squish" more than a felpro gasket which would give you a little more compression. If I had them I would use them. They aren't available anymore. Actually any gasket should be ok as long as the machine work is performed adequately. If your heads have been worked over before, you might get the machinist to check their thickness in case they have been surfaced quite a bit and that could give you a problem with the intake not matching up. A good machinist should be able to surface your intake to compensate for the difference if needed. Are you using a intake gasket that blocks off the exhaust port that heats the carb? If not you may want to consider getting your machinist to fill it. I saw where one guy melted a piston and poured the holes full. Thanks again for your useful post. I am not sure about the intake gasket type, but I will take some pictures from the gasket set I purchased tomorrow and post them here.
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Post by pouria on Feb 20, 2016 12:05:54 GMT -5
Below you can find the pictures of the intake gaskets: Kindly give me your comments on them.
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Post by pouria on Mar 3, 2016 6:10:26 GMT -5
I just purchased this pair of 974 heads for 230$. These are complete heads including everything: Seems to be a good deal, what do you think?
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