Stock intake manifold torque and sequence

Booher · 11-17-2019, 08:38 AM

Hey guys, I'm gonna be swapping out my intake for a ported one and had a couple quick questions. I tried some research but I cant find what I read a while back. Search in here is bugged at least for me. Anyways, what is the tightening sequence for the stock manifold? Also, its 75 in. Lbs right, with tightening the bolts twice, is that correct? I think that concerts to like 7 ft lbs.

wnta1ss · 11-17-2019, 09:06 AM

Chevrolet says to use a first pass of 44 lbs/inch on the LT1's intake manifold mounting bolts. Final torque specification for the intake manifold mounting bolts is 89 lbs/inch.

You could do a search for the MSD #2700 LT1 intake manifold installation directions, as they do have a diagram showing the tightening sequence for the mounting bolts.

Booher · 11-17-2019, 11:11 AM

Yes sir, I have that, but my OCD in me wanted to make sure lol. Thanks for correcting my torque lol, I'm about to tighten it down here in a few. Then gonna throw it all back together, and work on flex fuel kit, wideband sensor, and big mouth intake, so I may post a few more times hah

Booher · 11-17-2019, 03:55 PM

Alright, I got it all installed today, minus the throttle body, I need to wait for tuning day to put that sucker on. It all went pretty easily, I was wondering though, can I hook up my wideband where the primary goes, and just let the oem one hang for a week or so while I tune it and drive between tunes? Like, it will be ok to hook up my wideband now and drive around for a few days without a tune on it?

TJay74 · 11-20-2019, 07:07 PM

Quote:

Originally Posted by Booher

Alright, I got it all installed today, minus the throttle body, I need to wait for tuning day to put that sucker on. It all went pretty easily, I was wondering though, can I hook up my wideband where the primary goes, and just let the oem one hang for a week or so while I tune it and drive between tunes? Like, it will be ok to hook up my wideband now and drive around for a few days without a tune on it?

I would not do this. The primary or front O2 sensors directly control fueling while in closed loop operation. Leaving it out in the airstream can contaminate it and ruin the OEM O2 sensor and possibly cause running issues, it will also trip a code as well.

I would have a local muffler shop dril and weld in another O2 bung near the OEM front O2 sensor location and mount your WBO2 there.

wnta1ss · 11-21-2019, 06:28 AM

Quote:

Originally Posted by TJay74

I would not do this. The primary or front O2 sensors directly control fueling while in closed loop operation. Leaving it out in the airstream can contaminate it and ruin the OEM O2 sensor and possibly cause running issues, it will also trip a code as well.

I would have a local muffler shop dril and weld in another O2 bung near the OEM front O2 sensor location and mount your WBO2 there.

Probably this. Only way around installing the extra bung that might make sense is if your wideband has a narrowband simulation output. For example, I have an Innovate LM-2 on my bike, and from what I understand, it could simulate the narrowband, which would mean that you could unplug the stock narrowband O2 and plug the wideband's simulator in to make the computer happy. While having the wideband's sensor in the existing bung. Have not tried to do this though, it's just what I've heard (narrowband simulator from the datalogger).

Booher · 11-21-2019, 01:07 PM

Well, it just so happens that my primary passenger side 02 sensor burned out. So my only working 02 sensor is my wideband which isnt communicating with the car, only hp tuners. So I think it's best to just park the car and wait for a new 02 sensor. My only issue is, my road for tuning is 37 miles away and I'm afraid I'm just gonna blow another one out driving up there. I could drive up there then replace it on the side of the road, but it will be waaaaay too hot heh.

11-17-2019, 08:38 AM	#1
Booher Drives: 2019 zl1 6 speed Join Date: Jul 2017 Location: Lake Havasu Arizona Posts: 979	Stock intake manifold torque and sequence Hey guys, I'm gonna be swapping out my intake for a ported one and had a couple quick questions. I tried some research but I cant find what I read a while back. Search in here is bugged at least for me. Anyways, what is the tightening sequence for the stock manifold? Also, its 75 in. Lbs right, with tightening the bolts twice, is that correct? I think that concerts to like 7 ft lbs.

11-17-2019, 09:06 AM	#2
wnta1ss Drives: 2017 Camaro 1SS Join Date: Aug 2016 Location: NH Posts: 1,692	Chevrolet says to use a first pass of 44 lbs/inch on the LT1's intake manifold mounting bolts. Final torque specification for the intake manifold mounting bolts is 89 lbs/inch. You could do a search for the MSD #2700 LT1 intake manifold installation directions, as they do have a diagram showing the tightening sequence for the mounting bolts.

11-17-2019, 11:11 AM	#3
Booher Drives: 2019 zl1 6 speed Join Date: Jul 2017 Location: Lake Havasu Arizona Posts: 979	Yes sir, I have that, but my OCD in me wanted to make sure lol. Thanks for correcting my torque lol, I'm about to tighten it down here in a few. Then gonna throw it all back together, and work on flex fuel kit, wideband sensor, and big mouth intake, so I may post a few more times hah

11-17-2019, 03:55 PM	#4
Booher Drives: 2019 zl1 6 speed Join Date: Jul 2017 Location: Lake Havasu Arizona Posts: 979	Alright, I got it all installed today, minus the throttle body, I need to wait for tuning day to put that sucker on. It all went pretty easily, I was wondering though, can I hook up my wideband where the primary goes, and just let the oem one hang for a week or so while I tune it and drive between tunes? Like, it will be ok to hook up my wideband now and drive around for a few days without a tune on it?

11-21-2019, 01:07 PM	#7
Booher Drives: 2019 zl1 6 speed Join Date: Jul 2017 Location: Lake Havasu Arizona Posts: 979	Well, it just so happens that my primary passenger side 02 sensor burned out. So my only working 02 sensor is my wideband which isnt communicating with the car, only hp tuners. So I think it's best to just park the car and wait for a new 02 sensor. My only issue is, my road for tuning is 37 miles away and I'm afraid I'm just gonna blow another one out driving up there. I could drive up there then replace it on the side of the road, but it will be waaaaay too hot heh.

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