LS1TECH - Camaro and Firebird Forum Discussion
LS1-LS2-LS3-LS6-LS7 PERFORMANCE
Generation III External Engine
LS1/LSX intake manifold

Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories

Sponsored by:

LS1/LSX intake manifold

Reply Subscribe

Search this Thread

Old

Feb 6, 2024 | 11:36 AM

#1

Thread Starter

Teching In

Joined: Dec 2023

Posts: 11

Likes: 1

Default

LS1/LSX intake manifold

On the back of the LS1 intake are 2 vacuum ports. One seems to be a 1/2 line for the brake booster and the other goes to the HVAC system. The one that goes to the HVAC system, what size vacuum line is that?

Thanks,

Old

Feb 6, 2024 | 11:47 AM

#2

TECH Senior Member

Joined: Jun 2016

Posts: 22,291

Likes: 3,616

From: Central Cal.

Default

Measure it. It ain't rocket science....

Old

Feb 6, 2024 | 12:00 PM

#3

Thread Starter

Teching In

Joined: Dec 2023

Posts: 11

Likes: 1

Default

Quote:

Originally Posted by G Atsma

Measure it. It ain't rocket science....

Sorry, I should have been more clear. everything is installed and I really don't have visibility or much access to get a hand let alone a tape measure. If measuring it was an option that would have been my 1st move. Just assumed this was a place to get answers about LS related topics, but you know what they say about assuming.

Old

Feb 6, 2024 | 12:05 PM

#4

TECH Senior Member

Joined: Jun 2016

Posts: 22,291

Likes: 3,616

From: Central Cal.

Default

Try a couple different sizes of tubing. It's usually a very common size.

Old

Feb 6, 2024 | 01:09 PM

#5

TECH Junkie

iTrader: (1)

Joined: Sep 2004

Posts: 3,212

Likes: 1,612

From: Michigan & Florida

Default

It may vary by platform, i.e. Fbody, Ybody, etc. On my C5, it's around 3/16", or maybe 5mm, iirc. Wish I knew exactly......

Old

Feb 6, 2024 | 01:21 PM

#6

Thread Starter

Teching In

Joined: Dec 2023

Posts: 11

Likes: 1

Default

Quote:

Originally Posted by grinder11

It may vary by platform, i.e. Fbody, Ybody, etc. On my C5, it's around 3/16", or maybe 5mm, iirc. Wish I knew exactly......

Thank you a bunch. I will try that.

Old

Feb 6, 2024 | 03:54 PM

#7

TECH Apprentice

iTrader: (2)

Joined: Apr 2007

Posts: 303

Likes: 11

Default

I have an F Body intake (99) on my workbench right now and it is for 1/4" tubing or hose

Trending Topics

Never knew about this Trans Am before

9

228
Starting issues

20

635
Epic SRK B/S thread of 2019

12.7k

561.1k
LT1 camero. Fastest stock NA pony car ever?

1.1k

30.4k
Compression check

9

316

Old

Feb 6, 2024 | 10:54 PM

#8

Thread Starter

Teching In

Joined: Dec 2023

Posts: 11

Likes: 1

Default

Quote:

Originally Posted by RGSS

I have an F Body intake (99) on my workbench right now and it is for 1/4" tubing or hose

Thanks so much.

LS1 Tech Stories

The Best V8 Stories One Small Block at Time

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Verdad Gallardo

6 Common C5 Corvette Failures and What's Involved In Repairing Them

Pouria Savadkouei

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Verdad Gallardo

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Pouria Savadkouei

Top 10 Most Powerful Chevy Trucks Ever Made!

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Verdad Gallardo

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Verdad Gallardo

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Verdad Gallardo

10 Camaros You Should Never Buy

10 LS Engine Myths That Refuse to Die

Verdad Gallardo

Reply Subscribe

First
Prev
1 / 1
Next
Last

All times are GMT -5. The time now is 11:28 PM.