[BlackbeastSS2]

Originally Posted by lt4camaro

So you disconnected the brake vac line from the Booster?

Nope, there’s a mid point junction. The line from rear of the manifold to the junction point you disconnect there.

[lt4camaro]

Originally Posted by BlackbeastSS2

Nope, there’s a mid point junction. The line from rear of the manifold to the junction point you disconnect there.

thank you

[Fraxum]

I just heard back from Rotofab. They are looking into the LT2 fitment I brought up. They are a class act.

And yea, the brake booster line is a PIA. I left it on and it unsnapped easily on my bench. Much easier than on my '16 SS. However removing it from the LT2 IM is a bad idea as it looks a tiny bit damaged. The connection on the GPI LT2 is a little different. But it made a good seal back on my stock IM. Thanks for the part number.

[lt4camaro]

Originally Posted by BlackbeastSS2

Nope, there’s a mid point junction. The line from rear of the manifold to the junction point you disconnect there.

Thank You.

[Blackmonba6Gen]

So as I was reading a few pages back, it looks like the heat barrier/shield could cause fitment problems during install or is it best to shave off the entire ribs off the bottom and use whats there? I asked GPI about but they want an extra $75 to shave the entire bottom:/

[lt4camaro]

Originally Posted by Blackmonba6Gen

So as I was reading a few pages back, it looks like the heat barrier/shield could cause fitment problems during install or is it best to shave off the entire ribs off the bottom and use whats there? I asked GPI about but they want an extra $75 to shave the entire bottom:/

Easy enough to do with a electric grinder and a 7 inch 60 grit sander attached.

[Highland]

Does the Corvette not use a under manifold heat/sound pad?

[lt4camaro]

Originally Posted by Highland

Does the Corvette not use a under manifold heat/sound pad?

Do not know, but I would be more interested in Making my own heat reflector to keep the intake manifold cooler.

[SloCal]

Originally Posted by appleman22

it NEEDS a tune. It runs lean up top. The numbers don't lie.

Is this confirmed it’s too lean? Can’t run without a tune?

[m6-lt1]

Originally Posted by SloCal

Is this confirmed it’s too lean? Can’t run without a tune?

It seems to depend on the car and mods. After installing the manifold and checking logs it seems like some people need an adjustment to their tune and others do not. I saw an example where someone was running slightly rich and someone else was running a bit lean. I bought a manifold but never installed it. I plan on tracking my car and don’t have any plans on ever tuning my car. I can’t risk my air fuel not being spot on everywhere in the rev range and under every load condition. I’m selling my uninstalled manifold because of the examples I’ve seen.

[BlackbeastSS2]

Originally Posted by lt4camaro

Do not know, but I would be more interested in Making my own heat reflector to keep the intake manifold cooler.

I ended up putting heat foil tape on my underside of the LT2 manifold after I shaved the whole bottom.

[BlackbeastSS2]

Originally Posted by SloCal

Is this confirmed it’s too lean? Can’t run without a tune?

Totally agree with the 95mm TB it runs way to lean and my AFR gauge shows it. I have actually taken manifold and TB off till I complete other mods and will tune just before spring. (March)

As soon as I put it back to the stock manifold and TB the AFR readings went back to normal. But I miss that sound, sounded really good.

[SloCal]

Originally Posted by m6-lt1

It seems to depend on the car and mods. After installing the manifold and checking logs it seems like some people need an adjustment to their tune and others do not. I saw an example where someone was running slightly rich and someone else was running a bit lean. I bought a manifold but never installed it. I plan on tracking my car and don’t have any plans on ever tuning my car. I can’t risk my air fuel not being spot on everywhere in the rev range and under every load condition. I’m selling my uninstalled manifold because of the examples I’ve seen.

Same thoughts here but the car just doesn’t pull hard to top of the rev range so this would be a perfect fix but can’t risk track warranty.

Damn shame. Trying to figure out if people with stock throttle body and lt2 mani have issues or just ported tbs

[SloCal]

Originally Posted by BlackbeastSS2

Totally agree with the 95mm TB it runs way to lean and my AFR gauge shows it. I have actually taken manifold and TB off till I complete other mods and will tune just before spring. (March)

As soon as I put it back to the stock manifold and TB the AFR readings went back to normal. But I miss that sound, sounded really good.

Did you try with stock tb?