Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Throttle body diameters

Thread Tools
 
Search this Thread
 
Old Oct 10, 2008 | 10:14 AM
  #1  
hog's Avatar
hog
Thread Starter
TECH Fanatic
 
Joined: Oct 2005
Posts: 1,361
Likes: 0
From: Woodstock Ontario Canada
Default Throttle body diameters

I was wondering if anyone had a list of the different t-body diameters.

I am looking for: LS1, LS6, LS2 LS3 and LS7

Thanks guys

peace
Hog
Reply
Old Oct 10, 2008 | 11:49 PM
  #2  
Slo-Mo-Shun's Avatar
Staging Lane
iTrader: (2)
 
Joined: Feb 2006
Posts: 91
Likes: 0
From: Tyler, Tx
Default

This is what I got from a google search anyway... hope it helps.

LS1 = 78mm.

LS6 = 78mm.

LS2, LS3, and LS7 = 90mm.
Reply
Old Oct 11, 2008 | 01:06 AM
  #3  
Mohammed's Avatar
TECH Regular
 
Joined: Mar 2005
Posts: 426
Likes: 0
From: saudi arabia
Default

Originally Posted by Slo-Mo-Shun
This is what I got from a google search anyway... hope it helps.

LS1 = 78mm.

LS6 = 78mm.

LS2, LS3, and LS7 = 90mm.

LS1 = 75mm ?

how come both ls1 and ls6 are the same sizes
Reply
Old Oct 11, 2008 | 01:09 AM
  #4  
00pooterSS's Avatar
TECH Veteran
15 Year Member
Photogenic
Liked
Community Favorite
iTrader: (40)
 
Joined: Mar 2008
Posts: 4,920
Likes: 531
From: Dallas
Default

Originally Posted by Slo-Mo-Shun
This is what I got from a google search anyway... hope it helps.

LS1 = 78mm.

LS6 = 78mm.

LS2, LS3, and LS7 = 90mm.
Common misconception/bad info out there, the LS1 and LS6's are 75 not 78, there was a discussion about it and someone pulled a blade out and measured it. I believe the thing is the intake opening is 78, I have not confirmed that, but have confirmed the blade size.

Last edited by 00pooterSS; Oct 11, 2008 at 01:33 AM.
Reply
Old Oct 11, 2008 | 06:24 AM
  #5  
PREDATOR-Z's Avatar
TECH Senior Member
 
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Default

^Correct^
Reply
Old Oct 12, 2008 | 03:36 PM
  #6  
hog's Avatar
hog
Thread Starter
TECH Fanatic
 
Joined: Oct 2005
Posts: 1,361
Likes: 0
From: Woodstock Ontario Canada
Default

Thanks bunch guys.

peace
Hog
Reply
Old Oct 12, 2008 | 04:11 PM
  #7  
toothdoc's Avatar
Launching!
iTrader: (7)
 
Joined: Aug 2005
Posts: 278
Likes: 0
From: Chicagoland
Default

The inside diameter is probably 75mm which would make the outside diameter about 78mm. Hence the size of the intake.
Reply
Old Oct 12, 2008 | 06:29 PM
  #8  
Clevite Kid's Avatar
Staging Lane
 
Joined: Aug 2008
Posts: 71
Likes: 0
From: Miami, near the U.S.A.
Default

Not to mention the aftermarket TB's going up over 100 mm for the hard-core among us . . . . .
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

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

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Oct 12, 2008 | 11:08 PM
  #9  
00pooterSS's Avatar
TECH Veteran
15 Year Member
Photogenic
Liked
Community Favorite
iTrader: (40)
 
Joined: Mar 2008
Posts: 4,920
Likes: 531
From: Dallas
Default

Originally Posted by toothdoc
The inside diameter is probably 75mm which would make the outside diameter about 78mm. Hence the size of the intake.
What? the inside diameter of the throtte body is 75mm and the outside diameter of the blade is 75mm its all 75mm. Im guessing they just didnt care much if the intake matched
Reply




All times are GMT -5. The time now is 09:24 AM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-04 18:13:20


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE