First turbo build, 70 GTO...
Thread Starter
Joined: Mar 2003
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From: Little Austin
Yesterday Vic finished the opening for the Holley ProDash.
The Vintage Air vents will be here tomorrow, courtesy of @Summitracing .
Andrew
The Vintage Air vents will be here tomorrow, courtesy of @Summitracing .
Andrew
Thread Starter
Joined: Mar 2003
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From: Little Austin
I am afraid that progress has slowed down a little. I am waiting on a local shop to get me in for the exhaust work and after that the car comes home.
In the meantime, the dash is done:
I may add a thin trim ring to the fuel level gauge, just to make it match the tach and speedo.
Andrew
In the meantime, the dash is done:
I may add a thin trim ring to the fuel level gauge, just to make it match the tach and speedo.
Andrew
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Joined: Mar 2003
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From: Little Austin
I forgot to mention, the little slot to the right of the steering column is getting one of these:
https://www.molex.com/molex/products...ors/0795405067
Andrew
https://www.molex.com/molex/products...ors/0795405067
Andrew
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From: Little Austin
I went over to Vic's today and did a bunch of little projects to get it ready for a move to Hotrod Express to do the exhaust system. I cleaned the underside as best as I could, installed the gas tank, tidied up any loose wires, and packed up all of the left over parts to take home.
While I was doing all that, Vic tipped up a trim ring for the fuel level gauge:
Some people had expressed a concern for a lack of trim ring, so there it is...
Andrew
While I was doing all that, Vic tipped up a trim ring for the fuel level gauge:
Some people had expressed a concern for a lack of trim ring, so there it is...
Andrew
Thread Starter
Joined: Mar 2003
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From: Little Austin
The GTO took a ride to Hotrod Express this morning to have the exhaust system built.
To recap, the plan is to carry the single 4" from the downpipe, past the transmission crossmember. From there I have a Burns Stainless single 4" to dual 3" splitter, which then will feed into Dynomax UltraFlow Welded (PN 17547) large case mufflers and then tailpipes out the back with the OEM looking dual tips in the stock location. One of the 3" pipes will also have the exhaust valve installed before the muffler. This will allow me to effectively turn it into a single exhaust system for cruising on the highway. The exhaust valve will be controlled by the Holley Dominator ECU.
Andrew
To recap, the plan is to carry the single 4" from the downpipe, past the transmission crossmember. From there I have a Burns Stainless single 4" to dual 3" splitter, which then will feed into Dynomax UltraFlow Welded (PN 17547) large case mufflers and then tailpipes out the back with the OEM looking dual tips in the stock location. One of the 3" pipes will also have the exhaust valve installed before the muffler. This will allow me to effectively turn it into a single exhaust system for cruising on the highway. The exhaust valve will be controlled by the Holley Dominator ECU.
Andrew
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Joined: Mar 2003
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From: Little Austin
The GTO is at HotRod Express and they have been making some progress on the exhaust.
The ends of the tailpipes will also be modified to bring the stock looking tips through the cutouts in the rear valance panel.
There are going to be some issues with the tailpipes, which we anticipated. The the RideTech coilover is making the tailpipe fitment a little tricky. At this point it is clear that the front corners of the gas tank will need to be notched.
Andrew
The ends of the tailpipes will also be modified to bring the stock looking tips through the cutouts in the rear valance panel.
There are going to be some issues with the tailpipes, which we anticipated. The the RideTech coilover is making the tailpipe fitment a little tricky. At this point it is clear that the front corners of the gas tank will need to be notched.
Andrew
Forgive me for asking but both pipes run through mufflers so what would be the purpose of having it?
Additional exhaust flow through two pipes instead of one?
Car looks amazing btw, really enjoyed following your build and am excited to hear it run.
Additional exhaust flow through two pipes instead of one?
Car looks amazing btw, really enjoyed following your build and am excited to hear it run.
Thread Starter
Joined: Mar 2003
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From: Little Austin
Andrew
Ahh okay, I'll be curious to see if it works.
@rotary1307cc employed this really cool noise cancelling pipe in his exhaust by taking the frequency of the sound and adding a dead-end pipe to the exhaust to cancel it out and he says it worked amazing.
Perhaps something to consider if a nice sound is what you're looking for.
I thought maybe you were doing a different muffler or maybe a straight pipe for that section for additional sound and flow.
@rotary1307cc employed this really cool noise cancelling pipe in his exhaust by taking the frequency of the sound and adding a dead-end pipe to the exhaust to cancel it out and he says it worked amazing.
Perhaps something to consider if a nice sound is what you're looking for.
I thought maybe you were doing a different muffler or maybe a straight pipe for that section for additional sound and flow.
Thread Starter
Joined: Mar 2003
Posts: 10,604
Likes: 1,881
From: Little Austin
Ahh okay, I'll be curious to see if it works.
@rotary1307cc employed this really cool noise cancelling pipe in his exhaust by taking the frequency of the sound and adding a dead-end pipe to the exhaust to cancel it out and he says it worked amazing.
Perhaps something to consider if a nice sound is what you're looking for.
I thought maybe you were doing a different muffler or maybe a straight pipe for that section for additional sound and flow.
@rotary1307cc employed this really cool noise cancelling pipe in his exhaust by taking the frequency of the sound and adding a dead-end pipe to the exhaust to cancel it out and he says it worked amazing.
Perhaps something to consider if a nice sound is what you're looking for.
I thought maybe you were doing a different muffler or maybe a straight pipe for that section for additional sound and flow.
You're referring to a HelmHoltz resonator.
Andrew
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Joined: Mar 2003
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From: Little Austin
This morning I received more pictures of the exhaust from Friday. Looks like Josh is finish welding the exhaust...
My friend Tom is coming for a visit for a few days on Wednesday and I hope the car can come home on Thursday or Friday.
Andrew
My friend Tom is coming for a visit for a few days on Wednesday and I hope the car can come home on Thursday or Friday.
Andrew
Thread Starter
Joined: Mar 2003
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From: Little Austin
Here are some more progress pictures of the exhaust. It looks like Josh has finished with the exhaust welding and is working on the lower, front corners of the gas tank.
Andrew
Andrew