1980 Pontiac LeMans Station Wagon - G-T-faux (stuck with it, and can't shake it... like a bad case of herpes)
- Thread starter motorheadmike
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I am off for the Easter weekend, but the heater bypass valve and a set of 3" 1/2-20 Strange wheel studs arrived from Summit. Baby steps.
Put 1 stud inside each Easter egg.
Then have someone hide them on you!!!
Then have someone hide them on you!!!
Gotta use the ostrich eggs, though.
Natasha is dropping off the driveshaft for shortening today, 4" aluminum with 1350 u-joints - measured length is 47.5".
This exhaust system has been one seriously exhausting undertaking. But, it is mostly done now (just need to weld the hangers on).
The biggest challenge was fitting this exhaust with cats and getting the x-pipe to cooperate. I had to section the DS front leg and kick it out, add a bunch of pipe sections, and grunt a lot. Holley got this right on their Blackheart exhaust. Speaking of Holley... I really don't think they were thinking about using full-sized cats with their headers.
I decided to put a second WBO2 bung in the x-pipe to get a balanced reading off both banks. There is some debate about how much error there is having a sensor post-cat (0.1-0.5 AFR on the gas scale) - however for the purposes of baseline tuning it is plenty accurate. I will move the sensor forward of the cat when I start doing WOT blasts.
Other than that it was just a bunch of tweaks to make sure the cats, pipes, mufflers, and tails were all even and level.
Back to tweaking the tune. I will post another idle video once I get the tune better sorted (and yes, it sounds sweet).
The biggest challenge was fitting this exhaust with cats and getting the x-pipe to cooperate. I had to section the DS front leg and kick it out, add a bunch of pipe sections, and grunt a lot. Holley got this right on their Blackheart exhaust. Speaking of Holley... I really don't think they were thinking about using full-sized cats with their headers.
I decided to put a second WBO2 bung in the x-pipe to get a balanced reading off both banks. There is some debate about how much error there is having a sensor post-cat (0.1-0.5 AFR on the gas scale) - however for the purposes of baseline tuning it is plenty accurate. I will move the sensor forward of the cat when I start doing WOT blasts.
Other than that it was just a bunch of tweaks to make sure the cats, pipes, mufflers, and tails were all even and level.
Back to tweaking the tune. I will post another idle video once I get the tune better sorted (and yes, it sounds sweet).
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Thanks! The plan is to give them mental fits. But... but... but...
Decided not to shorten my 4" diameter shaft, and had a 3.5" made instead. When I did the final assembly of the exhaust the x-pipe needed to be moved back, so gaining some room with suspension droop is going to be advantageous.
Also built an overflow/expansion tank (started running out of space for things) and added a vacuum distribution block for the heater bypass valve (seriously the only reason I need a vacuum source in this car thanks to electronics).
Also built an overflow/expansion tank (started running out of space for things) and added a vacuum distribution block for the heater bypass valve (seriously the only reason I need a vacuum source in this car thanks to electronics).
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It might move under its own power tomorrow. I finished up a few minor things thus far this weekend: 3" wheel studs, torquing down the front suspension, heat shielding around the gas tank, more wiring, and finally got the brakes to hold pressure (we'll see how well in the morning).
Other than that I have a few little things left to do; but most important is to fill the differential.
I know I would really like to wash it.
Other than that I have a few little things left to do; but most important is to fill the differential.
I know I would really like to wash it.
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