Intake manifold gasket question
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,912
Likes: 12
From: Schaumburg (Chicago) Illinois
Intake manifold gasket question
There are intake manifold gaskets which have a blocked off exhaust crossover, Summit FPP-1204, and those that don't, Summit FPP-1256. I can't seem to find an explanation between the 2 and need to pick one. Can anyone advise?
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Both are .060 thick use 1.23 X 1.99 for intake demension, the 1204 has the blocked heat crossover, the 1256 has an open heat crossover, both are for factory heads its just a matter if you want to keep the heat crossover working on your car.
Last edited by Little Mouse; Sep 26, 2009 at 04:07 PM.
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,912
Likes: 12
From: Schaumburg (Chicago) Illinois
What is the heat crossover?
Former Vendor
Joined: Apr 2009
Posts: 766
Likes: 3
From: Charlotte North Carolina 704-394-5150
The heat crossover is the area made into the intake that allows exhaust gases to heat up the area on the intake manifold where your choke pull off assembly is mounted. IF you block this area off...then the area for your choke will not get hot as needed and cause your choke to work incorrectly.
"DUB"
"DUB"
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,912
Likes: 12
From: Schaumburg (Chicago) Illinois
The heat crossover is the area made into the intake that allows exhaust gases to heat up the area on the intake manifold where your choke pull off assembly is mounted. IF you block this area off...then the area for your choke will not get hot as needed and cause your choke to work incorrectly.
"DUB"
"DUB"
Thread Starter
Drifting
Joined: Jun 2006
Posts: 1,912
Likes: 12
From: Schaumburg (Chicago) Illinois
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
dont block it if you are using a choke or a lot of street driving, unless you are running an elec. choke, if your heads have no crossover then you can actually run either gasket.....good luck
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Brett Foote
Team Owner
Joined: Jan 2006
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From: Crossville TN
If you have an electric or manually operated choke, you can block off the center 'heat riser' passage in the manifold. If you have a 'divorced' choke, you can't block them...at least, not if you want the choke to work properly.
