04-19-2021, 11:43 AM | #1 |
LT2 Intake Manifold Modification Questions
I recently bought an LT2 Intake Manifold and am looking to do the modifications to it on my own. I feel comfortable with everything but the brake booster fitting, are there any detailed videos on drilling the hole for the brake booster fitting? I'm assuming I'm not supposed to drill all the way through the outer wall, if that's the case are there any tips for drilling into it?
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04-19-2021, 12:26 PM | #2 |
Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
Posts: 1,656
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Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod
Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“ |
04-19-2021, 02:35 PM | #3 | |
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04-19-2021, 05:40 PM | #4 |
Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
Posts: 1,656
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The hole goes into the manifold. I wouldn’t let the drill but go any deeper than necessary to breakthrough the wall of the manifold. I measured 4-1/4” before the drill would come into contact with the #7 runner.
I put light in #8 runner so you can see it lighting up the booster hole. I’m sure the drill bit will try to pull through when it breaks into the inner wall. That’s why you should use the shortest bit possible. I let GPI do the mods on mine.
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Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod
Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“ |
04-19-2021, 09:39 PM | #5 |
Drives: 2017 1SS 1LE Silver Ice Metallic Join Date: Jun 2016
Location: SF Bay Area
Posts: 255
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I think this may work for you.
https://youtu.be/_DQdZ9rfQ68 |
04-20-2021, 01:03 PM | #6 |
Drives: 2016 SS Join Date: Jan 2016
Location: PHOENIX
Posts: 156
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how thick is the manifold wall in that area? any one know? thanks
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04-21-2021, 07:25 AM | #7 |
2018 SS A8 11.85@117.06
Drives: 2018 Camaro SS A8 "Dark Knight" Join Date: Oct 2019
Location: MICHIGAN
Posts: 210
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maybe a 1/4 inch at best
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DARK KNIGHT
2018 SS A8 11.85 @ 117.07 GPI Tuned E85 stock tires Roto Fab CAI LT 2 intake |
05-28-2021, 01:36 PM | #8 |
Shifts under load
Drives: 2020 Camaro 1SS 1LE rally green Join Date: Apr 2017
Location: Fuquay-Varina, NC
Posts: 1,295
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I wonder what kind of fitting that is that GPI used and what connection to the OEM brake booster line? About to order the black 90" one and the 1/4 drill bit and 7/16" tap kit.
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24 Audi S3 prem plus, sport package
HPDE - southeast - JTI- solo, PCA- blue. 22 Suzuki GSX-S 1000GT blue |
05-28-2021, 07:56 PM | #9 | |
Drives: Chevy Camaro 2018 Join Date: Sep 2020
Location: Wisconsin
Posts: 50
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05-29-2021, 02:01 PM | #10 |
Shifts under load
Drives: 2020 Camaro 1SS 1LE rally green Join Date: Apr 2017
Location: Fuquay-Varina, NC
Posts: 1,295
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Just finished whizz wheeling that crap off the bottom and the nub. Now to get the bit and tap and install the elbow. Gonna have Pray port both my 95 and the LT2.
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24 Audi S3 prem plus, sport package
HPDE - southeast - JTI- solo, PCA- blue. 22 Suzuki GSX-S 1000GT blue |
05-30-2021, 08:35 AM | #11 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
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U guys running the foam under it?
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
05-30-2021, 08:53 AM | #12 |
Drives: 2016 2SS 8AT Join Date: May 2018
Location: Nevada
Posts: 358
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no, I figured that if you have to clearance the bottom of it to fit the hp pump then the foam would only make it worst
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05-30-2021, 09:41 AM | #13 |
Drives: 2017 SS 1LE Join Date: Mar 2017
Location: Florida
Posts: 617
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Removed foam and use a sheet of that temp barrier stuff. Like an edelbrock air gap manifold...
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05-30-2021, 11:43 AM | #14 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
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I don’t have foam under mine but am curious. I watched the YouTube specifying where to cut but don’t want to risk vacuum leaks. I hate vacuum leaks and the concept of retightening.
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
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