2f 3f headers

CrackedCranium · 06-27-09, 07:13 AM

I am looking to put a header on my fj62 with a 3F engine.
I understand the the 3F requires 2 o2 sensors for the ecm,
but my question is will the 2f header bolt to the 3f head?

rfj62 · 06-27-09, 08:41 AM

You can't put 2F headers on a 3F engine, you can however get 3F headers from TPI and Man-a-fre.

Check out this thread on wiring O2 sensors together.
What can cause the ecu to light on fire?????

RockDoc · 06-27-09, 10:43 AM

Common wisdom is that the manifolds on a 3FE perform well....... Are you having issues with them?

CrackedCranium · 06-27-09, 09:45 PM

no just looking to put on a simpler exhaust.

Mark W · 06-27-09, 10:34 PM

Run the twin head pipes into a single and install O2 sensors just downstream from the exhaust manifolds a little... before joining the head pipes into one. One you join the head pipes into one, run it (with 2.5 inch pipe) inside the frame with a single cat and muffler

Simple and effective and inexpensive.

Mark...

rfj62 · 06-28-09, 05:06 AM

Quote:

Originally Posted by RockDoc

Common wisdom is that the manifolds on a 3FE perform well....... Are you having issues with them?

Yeah, I would stick with the stock manifolds also.

pappy · 06-28-09, 06:21 AM

Quote:

Originally Posted by Mark W

Run the twin head pipes into a single and install O2 sensors just downstream from the exhaust manifolds a little... before joining the head pipes into one. One you join the head pipes into one, run it (with 2.5 inch pipe) inside the frame with a single cat and muffler

Simple and effective and inexpensive.

Mark...

I agree with Mark. The 3FE manifolds work just dandy. I just happen to have the exhaust out of my truck. Pic isn't very good because I had to straddle a bunch of junk to get the shot. But it does show what Mark was suggesting.

SHERMAN FJ62 · 06-28-09, 06:23 AM

I have been told you need to stick with the manifold on the 3fe because they will blow the gaskets out on the headers. They also do not offer preformance boost

CrackedCranium · 06-28-09, 05:25 PM

thanks very much for all the advice,

rfj62 · 06-29-09, 01:13 PM

Do you have them coated with something, like a exhaust paint?

Quote:

Originally Posted by pappy

I agree with Mark. The 3FE manifolds work just dandy. I just happen to have the exhaust out of my truck. Pic isn't very good because I had to straddle a bunch of junk to get the shot. But it does show what Mark was suggesting.

pappy · 06-29-09, 02:24 PM

The manifolds? IIRC, they were powder coated with a high temp powder by the engine builder. The pipes were not.