Fast 102 LS2 intake Q
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
Fast 102 LS2 intake Q
Has anyone hooked up to the vacuum port on the back of the intake for there NPP mufflers? If so, was the port open or did you have to drill it out?
Thanks
John
Thanks
John
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
reason I ask: I remember hearing about a member that tried to hook up his NPP to the back of the manifold and it was not open, just don't want to have to remove the intake to drill it out.
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
That is what I was afraid of.
Going to make my NPP install a bit more interesting.
It was probably in the instructions, I had stock mufflers at the time I installed mine unfortunately.
Thanks,
John
Going to make my NPP install a bit more interesting.
It was probably in the instructions, I had stock mufflers at the time I installed mine unfortunately.
Thanks,
John
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
Is this for an LS2 or LS3? My LS3 102 had a little molded plastic nipple covering the NPP vacuum port on the back of the manifold. I had Corsa mufflers when I installed it, so I left it alone. When I went to my B&B Fusions, I had to just twist/break the nipple cover off and the vacuum port was open. No need to drill, at least on the LS3 version.
Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
glad that was the case for you, mine is for an LS2 and it isn't looking good. 
I will pop the cap off of it and fire up the car to see if there is any vacuum otherwise......plan b i guess
I will pop the cap off of it and fire up the car to see if there is any vacuum otherwise......plan b i guess
Melting Slicks
Joined: Jun 2006
Posts: 2,164
Likes: 3
Is this for an LS2 or LS3? My LS3 102 had a little molded plastic nipple covering the NPP vacuum port on the back of the manifold. I had Corsa mufflers when I installed it, so I left it alone. When I went to my B&B Fusions, I had to just twist/break the nipple cover off and the vacuum port was open. No need to drill, at least on the LS3 version.
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
Maybe mine was broken off, I'm having a few minor issues with my tune and maybe it's cause by what could be a small vacuum leak, but I figure it would be running much worse than this. I did call Comp and the guy that answered told me it had to be drilled out, I hope he was wrong, let me know what you find.
Maybe I'm confused here. The plastic cover on the vacuum port might have been on the stock LS3 manifold. Now that I really think about it, I think it was the LS3 manifold
Now it's all coming back to me. I needed a vacuum plug to cover the NPP port on the FAST when I installed it. I remember thinking I was lucky I was at my shop and had some extra plugs laying around. I don't think the instructions mentioned it.
I am also 100% sure that I did not have to drill out the NPP port on the back. I believe it was just open and would have resulted in a vacuum leak if I had not plugged it. Again, this was on the LS3 FAST intake.
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Thread Starter
Drifting
Joined: Oct 2004
Posts: 1,790
Likes: 29
From: STL MO
St. Jude Donor '09-'10
Ben mentioned something about that, I will use that as a back-up if my vacuum port isn't already open.
Thanks for the drag radial tip in the other thread as well Joe.
Thanks for the drag radial tip in the other thread as well Joe.
