FAST 102mm too big?
Thread Starter
TECH Apprentice
iTrader: (24)
Joined: Dec 2008
Posts: 315
Likes: 1
From: Fort Wayne, Indiana
FAST 102mm too big? Is there a such thing as too big of an intake manifold? I've got an '02 Trans Am with full bolt ons and a TR224 cam and I was wondering if the 102mm Fast intake and TB are "too big" for a stock displacement LS1, or if there's no such thing as too big when it comes to intake air-flow.
Thanks
Thanks
Too big, no. Not efficent for your money spent, yes. The intake can only give as much air as the heads can bring in. Its all in the set up also though. From many of the people running the 224/224 I have seen around here, the ls6 is fine. For my big *** cam I want the 102 though, since past 6400 the ls6 starts dropping off.
Thread Starter
TECH Apprentice
iTrader: (24)
Joined: Dec 2008
Posts: 315
Likes: 1
From: Fort Wayne, Indiana
yeah that makes complete sense for a car with stock heads, however aftermarket heads are in the near future.
I've got another question now, do the stock heads restrict flow more than the LS6 intake, or the other way around? For a FAST intake and TB it'll cost about the same as heads, so which is a better to do first.
I've got another question now, do the stock heads restrict flow more than the LS6 intake, or the other way around? For a FAST intake and TB it'll cost about the same as heads, so which is a better to do first.
LS6 (243) heads and an LS6 intake manifold are pretty closely matched at full lift (0.550 -0.600) flow rates. But aftermarket heads improve flow at the lower lift levels, which the LS6 manifold can already handle. Logic suggests to change heads first for immediate power.
For your set up, I would also agree heads first, then fast intake later. I am running a 242/248 111 lsa, spinning 7k+, so for me, (honestly both would be more than ideal), the Fast would be a nice jump for me. I also want to do a lot of work to my heads to gain full advantage of my cam and FAST set up, so...more money and time invested.
Trending Topics
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
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Thread Starter
TECH Apprentice
iTrader: (24)
Joined: Dec 2008
Posts: 315
Likes: 1
From: Fort Wayne, Indiana
Not to mention we arent discussing applications dealing with carbs where BIG can mean poor airspeed and improper fuel atomization in regards to a discussion dealing with manifolds. A TB is basically an adjustable airblade....thats really all it is.....a carb on the other hand is altogether different as it meters fuel and therefore being properly sized to the application is a much more important scenario.
Hitting on the OP's concerns.....always go heads first than a better intake manifold. Without a really good head a higher flowing intake wont really shine.....for that to happen the stock intake must become a restriction as it certainly does when you place an efficient set of deep breathing heads underneath it.
You would see a little gain in power swapping the intake first but your better off getting heads first and/or doing them at the same time money permitting.
-Tony
