Some of you may know that I've been working on a 3.4 swap for awhile. I am going DIS and using most of the F-body components. Something that I have found with the 3.4 upper intake is that it interferes with the 2.8 thermostat housing. I fixed that by switching to the 3.4 housing, but even then I had to grind it down a little. I then discovered that the coolant temp sensor was in the way. I haven't seen anything on this forum to note this, so first off, has anyone actually used 3.4 intake on their swap, and second if so, where is the best place to relocate the temp sensor?

quote Originally posted by retroman: Some of you may know that I've been working on a 3.4 swap for awhile. I am going DIS and using most of the F-body components. Something that I have found with the 3.4 upper intake is that it interferes with the 2.8 thermostat housing. I fixed that by switching to the 3.4 housing, but even then I had to grind it down a little. I then discovered that the coolant temp sensor was in the way. I haven't seen anything on this forum to note this, so first off, has anyone actually used 3.4 intake on their swap, and second if so, where is the best place to relocate the temp sensor?

I think most people don't use it because it faces the wrong direction for proper air inlet from the drivers side. I always wondered if you could simply rotate it 180 degrees (so that it would be facing backwards in the Camaro / Firebird)? Do the runners line up?

I did flip it 180 degrees because the TB had clearance issues with the deck lid hinge. The runners do line up when reversed to face the standard Fiero direction, but you need to use the 3.4 thermostat housing as the 2.8 neck will not work. Even with the 3.4 housing I had to pound the top flat and grind it down a little. That leaves relocating the coolant temp sensor which I now think will be moved to the side of the water jacket. If only I had realized this before I put the motor in... Also I should note that because I am going DIS the usual distributor clearance issue is not a problem.

Which coolant temp sensor is in the way? The one for the ECM faces the shock tower.
The ones that stick straight up are the cold start switch and the fan switch.

Since you're going DIS, is it safe to assume you're going 7730?
If so, you can probably delete the cold start temperature switch and cold start injector. (I kept the stock ECM and did away with my CSI anyway.)
If the fan is controlled by the ECM (i don't know if that's the case or not) you can eliminate that switch too.

If you're using the Camarobird ECM, I'm pretty sure it deletes the CSI. Not sure about the fan switch.

[This message has been edited by Raydar (edited 11-01-2013).]

Are you using the F-body lower intake? If not, then you probably should.

Also, which ECM are you using?

quote Originally posted by Blacktree: Are you using the F-body lower intake? If not, then you probably should. Also, which ECM are you using?

I am using the F-body lower intake as the lower Fiero intake will only work with the stock 2.8 upper. I have also swapped to a 7730 ECM.

And which coolant sensor are you referring to? The cold start switch and fan switch (both of which are on the lower intake on the Fiero) can go bye-bye. So all you have left are the ECM temp sensor (which sticks out of the lower intake horizontally, just above the water pump) and the gauge sender (which is on the corner of the cyl head). Are one of these two causing an interference issue?

quote Originally posted by retroman: Some of you may know that I've been working on a 3.4 swap for awhile. I am going DIS and using most of the F-body components. Something that I have found with the 3.4 upper intake is that it interferes with the 2.8 thermostat housing. I fixed that by switching to the 3.4 housing, but even then I had to grind it down a little. I then discovered that the coolant temp sensor was in the way. I haven't seen anything on this forum to note this, so first off, has anyone actually used 3.4 intake on their swap, and second if so, where is the best place to relocate the temp sensor?

Post a picture. It will make it easier for people to help you out...

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-Brian

My 87 GT Poly Suspension Upgrade (all pics) thread
Removing the roof panel
My HUD install thread
Modified stock air canister and base to 3.5 inch for 3800na

Isn't it strange that after a bombing, everyone blames the bomber, his upbringing, his environment, his culture, his mental state but … after a shooting, the problem is the gun?