Ls1 Throttle body
TECH Senior Member
Joined: Jun 2016
Posts: 22,295
Likes: 3,619
From: Central Cal.
Dyno tests prove/disprove the effectiveness of throttle bodies larger than the manifold inlet. It's not about turbulence, rather about the inlet restricting the flow of a larger TB. There is no benefit of a throttle body larger than the manifold inlet. As far as anticipating a different intake setup, wait to install a larger TB until that actually happens.
Teching In
Joined: May 2021
Posts: 19
Likes: 7
From: Raleigh Suburbs
Dyno tests prove/disprove the effectiveness of throttle bodies larger than the manifold inlet. It's not about turbulence, rather about the inlet restricting the flow of a larger TB. There is no benefit of a throttle body larger than the manifold inlet. As far as anticipating a different intake setup, wait to install a larger TB until that actually happens.
Banned
Joined: May 2020
Posts: 252
Likes: 84
From: USA
I'd go to the junkyard and buy one for $30, but thats just me I guess. Thats after I used up the 5 spares I have. Truck TB's of course, as if I have to say it.
And the problem putting a 92mm on it, stock intake or not, is tuning the IAC effective area, and general **** you just never have to tune if it's stock. Or leave it untuned and deal with it idling like crap.
Hardly worth the pissing match.
And the problem putting a 92mm on it, stock intake or not, is tuning the IAC effective area, and general **** you just never have to tune if it's stock. Or leave it untuned and deal with it idling like crap.
Hardly worth the pissing match.
TECH Senior Member
Joined: Jun 2016
Posts: 22,295
Likes: 3,619
From: Central Cal.
Says me, knowledgeable American auto enthusiast
Teching In
Joined: May 2021
Posts: 19
Likes: 7
From: Raleigh Suburbs
Naturally aspirated, once a larger throttle body is passing all the air the manifold inlet will pass, the remaining throttle travel does nothing, whether the flow is run thru a cone or not. This situation is very difficult to tune due to the flat spot at the end of TB opening. The inlet will "process" the air, but that isn't the issue at hand. Fuel calibration is, due to TB travel without additional air volume being passed.
Says me, knowledgeable American auto enthusiast
Says me, knowledgeable American auto enthusiast
TECH Senior Member
Joined: Jun 2016
Posts: 22,295
Likes: 3,619
From: Central Cal.
Ahhh I see. It's not the turbulence of air passing through the TB, it is a computer not knowing what is going on with the air entering the engine. I suppose, if somehow magically the mass airflow sensor would be located after the TB, it would not matter what size the inlet is because amount of air would be calculating correctly.
You are also correct that IF there were a MAF sensor between TB and manifold, that would be accounted for, but only if the TB movement were ignored.
Teching In
Joined: May 2021
Posts: 19
Likes: 7
From: Raleigh Suburbs
Correct. The computer would be "confused" by the last segment of blade opening without any additional air going into the manifold.
You are also correct that IF there were a MAF sensor between TB and manifold, that would be accounted for, but only if the TB movement were ignored.
You are also correct that IF there were a MAF sensor between TB and manifold, that would be accounted for, but only if the TB movement were ignored.
Thanks for clarifying the physics, it's tough to see it at times within the induction system.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
