need help choosing right intake manifold gaskets, for ported heads. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dbmx66 · 07-22-2011, 03:48 AM

okay so i have a problem, i got a new dart intake for my engine, and i accidently tore my old intake gaskets while taking the old victor jr off. i forget what part number they were, they are fel-pro ones. the black ones with the blue rings.

but anyway. i used my dial caliper to measure the ports on my heads. and they dont make a gasket thats exactly the size. question is do i get the ones that are slightly smaller, or the ones that are slighty larger?

thanks.

djracer · 07-22-2011, 06:37 AM

I'd say slightly larger.

dbmx66 · 07-22-2011, 10:57 AM

Quote:

Originally Posted by djracer

I'd say slightly larger.

okay thank you, thats what i did, the next size bigger is 20 thousanths bigger, so im gonna go with them.

Marv D · 07-22-2011, 12:24 PM

With 'luck' there will be a step 'out' into the head with the head having a larger port diminsion than the intake. If it's the other way around,, ummmm I'd reconsider useing the intake,,, but that's another discussion all together.

The FelPro 1205
Stock or Small Race Port
Port Size: 1.28" x 2.09"
Thickness: .060"

1206 medium race port gasket is:
Port Size: 1.34" x 2.21"
Thickness: .060"

1207 Large Race Port
Port Size: 1.38" x 2.28"
Thickness: .060"

Whichever you use has to seal the LARGER of the two,, intake or head. If you order too small there will typically be leaks around the perimiter of the larger port
Hope that helps

dbmx66 · 07-22-2011, 02:27 PM

Quote:

Originally Posted by Marv D

With 'luck' there will be a step 'out' into the head with the head having a larger port diminsion than the intake. If it's the other way around,, ummmm I'd reconsider useing the intake,,, but that's another discussion all together.

The FelPro 1205
Stock or Small Race Port
Port Size: 1.28" x 2.09"
Thickness: .060"

1206 medium race port gasket is:
Port Size: 1.34" x 2.21"
Thickness: .060"

1207 Large Race Port
Port Size: 1.38" x 2.28"
Thickness: .060"

Whichever you use has to seal the LARGER of the two,, intake or head. If you order too small there will typically be leaks around the perimiter of the larger port
Hope that helps

i already port matched the intake to the heads. if that helps.

07-22-2011, 03:48 AM	#1
dbmx66 Registered User Join Date: Aug 2009 Location: PA Posts: 883	need help choosing right intake manifold gaskets, for ported heads. okay so i have a problem, i got a new dart intake for my engine, and i accidently tore my old intake gaskets while taking the old victor jr off. i forget what part number they were, they are fel-pro ones. the black ones with the blue rings. but anyway. i used my dial caliper to measure the ports on my heads. and they dont make a gasket thats exactly the size. question is do i get the ones that are slightly smaller, or the ones that are slighty larger? thanks.

07-22-2011, 06:37 AM	#2
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: need help choosing right intake manifold gaskets, for ported heads. I'd say slightly larger. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

07-22-2011, 12:24 PM	#4
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: need help choosing right intake manifold gaskets, for ported heads. With 'luck' there will be a step 'out' into the head with the head having a larger port diminsion than the intake. If it's the other way around,, ummmm I'd reconsider useing the intake,,, but that's another discussion all together. The FelPro 1205 Stock or Small Race Port Port Size: 1.28" x 2.09" Thickness: .060" 1206 medium race port gasket is: Port Size: 1.34" x 2.21" Thickness: .060" 1207 Large Race Port Port Size: 1.38" x 2.28" Thickness: .060" Whichever you use has to seal the LARGER of the two,, intake or head. If you order too small there will typically be leaks around the perimiter of the larger port Hope that helps __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.



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