Stock intake manifold
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 190
Likes: 0
From: Fort Worth , TX
Stock intake manifold I know the stock throttle body bore is 48mm but what is the bore on the intake manifold ? I've seached and found a site saying 52mm and a site saying 54mm . I'm just curious and was considering a 52mm throttle body if that was the same size as the manifold .
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Well, there wasn't a 54mm till someone ported a stocker to it, so most sites will probably say 52mm because that's the biggest aftermarket TB that'll fit on a stock intake. So I'm going to say that it's actually a 54mm opening on the intake itself. Otherwise, why even make a 54mm TB? Why not go between 52 and 58, and make a 55mm? 
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 190
Likes: 0
From: Fort Worth , TX
Thats wierd that there were 52 and 54 mm manifolds . I don't really "need" a larger throttle body I just thought it might help out a little being the same size as the bore on the manifold .
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
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 Thread Starter
On The Tree
Joined: Mar 2008
Posts: 190
Likes: 0
From: Fort Worth , TX
Thats a pretty big margin of error lol . I'll probably just go with a 52mm tb. Probably the professional products one . I seen them for about 200 and I know its not necessary being lightly modded but it seems that if that would match up to the manifold pretty closely it might help out a little with air flow over the stock one .
I did not say the opening was an error, I said incidental.
For 52mm you would be better off getting a rebored stocker as all the aftermarket TBs have some nagging little hassles that the stocker wont.
For 52mm you would be better off getting a rebored stocker as all the aftermarket TBs have some nagging little hassles that the stocker wont.
Iv'e read that a few times too, and is the reason I went with a ported stocker. Plus I'm not making all that much HP, and I figure the 52mm is plenty for my set-up.
