Sourmug's 3.4 DOHC Swap (Page 13/28)
Sourmug AUG 18, 10:59 PM

quote
Originally posted by The Aura:

What Brand spark plug wires are those?



These ones:
Sourmug AUG 18, 11:05 PM

quote
Originally posted by Fierobsessed:

Thanks for that!

I was looking all over for an air canister like the Fiero's that has an offset inlet. That's the challenge right there.



Here are some pictures:









Nolan
Sourmug AUG 26, 05:09 PM
Here are some additional pictures.

A nice shot of those yummy ports and valves:


The intake neck and throttle body:


The fourth mount:


Some of the trimming and cleaning of the engine bay:




The new electrical terminals from the front mount battery:


Relocated battery:


Nolan
qwikgta AUG 27, 12:03 PM
Looking good. Pics take me back to when I was doing mine. I loved coming up with new ideas for any problem I faced. If I ever had to do it again, I'd do another 3.4 DOHC. Hell, after you finish one, you know all the problems before hand. I'd be able to cut my install time by about 80%. I really like the stock style air cleaner look you have going on, and the 4th motor mount. (wish I thought of that). One thing I'd do differant is with the 96-97 intake/elbow/TB setup. I spend so much time looking it over, i think i'd take it to a machine shop, have two small hose adapters welded in for the coolant hosed, remove the TB mount, so the upper and lower intakes can be free of each other. Then make a 90 elbow off the Upper Intake to move the TB up and away from the stock location. Just too much going on in that area. I had fuel lines, coolant lines, shifter cables and air intake all fighting for the same real estate.

Again, really love the look

Rob
Steven Snyder AUG 28, 08:37 PM
Nice, clean swap! Good job man.

Do you have any concern about the exhaust holding up against motor movement & vibration without a flex coupler? The 91-95 motors had a flexible spring-loaded cup joint on the rear manifold dump, which prevents engine movement from stressing the exhaust, but I see that with your 96-97 era motor it's a flat bolted flange.

------------------

1988 Pontiac Fiero 3.4 DOHC V6 5-speed
California Smog Legal!

Sourmug AUG 28, 09:48 PM

quote
Originally posted by Steven Snyder:

Nice, clean swap! Good job man.

Do you have any concern about the exhaust holding up against motor movement & vibration without a flex coupler? The 91-95 motors had a flexible spring-loaded cup joint on the rear manifold dump, which prevents engine movement from stressing the exhaust, but I see that with your 96-97 era motor it's a flat bolted flange.




I didn't actually do the swap, Fieroking did. He has a similar exhaust set up in his DOHC car and it has been running for a few years with no exhaust issues that I'm aware of.

Thanks
Nolan
Steven Snyder AUG 29, 04:40 PM

quote
Originally posted by Sourmug:
I didn't actually do the swap, Fieroking did. He has a similar exhaust set up in his DOHC car and it has been running for a few years with no exhaust issues that I'm aware of.



His exhaust setup has the spring-loaded connection I was referring to. This gives it some flex.

From Fieroking's build thread:


vs.
Sourmug AUG 29, 05:14 PM
Ah, I see what you mean. I'll ask Joe about it.

Thanks
Sourmug SEP 03, 07:09 PM
I asked Joe about the exhaust, here's his response:


"I don't think there will be a problem there is not a lot of movement and the mounts for the exhaust are pretty tight. My exhaust wraps around the cradle were yous is more of a straight shot to the muffler."

So we'll see how it holds up.

On a side note, I had to replace the heater core yesterday. Just about the only thing on the car that's not new and it fails, go figure

[This message has been edited by Sourmug (edited 09-03-2011).]

Reallybig SEP 09, 02:32 AM
Any new progress, or are we done till next summer?