Well, our Civic project is finally coming to a close and we will be developing a set of headers for it over the next few weeks. We do have a getrag 4.9 in a Formula sitting right next to it, so the plan is to build them in a way that they would work on both vehicles
They will be using 28"ISH long, 1 1/2" primaries into 3" collectors - 16g mild steel. Hopefully, they would be equal length but the engine bay in the Civic is already cramped. On the Fiero and Civic, the odd bank would go towards the tranny, down, through a muffler and under the oil pain where it's notched. The even bank will drop down and towards the pulley side and should leave ample room for a muffler leaving no need to cut the trunk.
We will be able to make them to follow the traditional Fiero routing, but that will come a while later
All thoughts, concerns and comments are welcome
[This message has been edited by FriendOfYours (edited 09-29-2011).]
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07:11 PM
PFF
System Bot
Raydar Member
Posts: 40762 From: Carrollton GA. Out in the... country. Registered: Oct 1999
There are a couple of issues going under the oil pan. Clearance is one. You have to be clear of the pan, so your 1.5" pipe will likely be a 2" space under the oil pan. That leaves it pretty low. The other issue is heat. You really want all that header heat feeding your oil sump?
I have true duals and they are 32" x 1.5" and believe me, they throw a whole lot of heat, even coated and wrapped.
In the eldorado and seville the front manifold runs underneath the notch in the oil pan, which could be a big reason for the factory oil cooler. The headers will not be under the oil pan as it will already be 3" by the time it gets there
Many people including myself have routed the exhaust this way already with no issues
[This message has been edited by FriendOfYours (edited 09-29-2011).]
Originally posted by Arns85GT: Danyel's thread said "I am trying to get in touch with Dave "FriendOfYours" " It is about a missing 4.9 valve cover. It had nothing to do with fabbing true duals. My point stands Arn
Sometimes the only way to get a hold of someone is to post in his thread so the system sends him a message ... NO HIJACK INTENDED because it links to an IMPORTANT subject. if you would of read it you would also see I WASNT the OP of the thread !!! I was just wondering what happened to the person and nothing bad happened to him ... and if you read that link you will understand ... SO no hi-jack here my friend ..
Try to pick up a set of 4.5 manifolds. Unlike the solid cast iron ones on the 4.9, they are stainless and have a welded on flange. They are a great base for custom built 4.9 headers. Just cut off the flange and use a header kit to make your own.
Try to pick up a set of 4.5 manifolds. Unlike the solid cast iron ones on the 4.9, they are stainless and have a welded on flange. They are a great base for custom built 4.9 headers. Just cut off the flange and use a header kit to make your own.
