intake shroud mod????
Thread Starter
Safety Car
Joined: Sep 2008
Posts: 4,296
Likes: 156
From: Location: Location: kAnSaS
intake shroud mod????
have an 09 ls3 and have been looking for awhile for an aftermarket CAI,,,,,but also see alot of reasons/posts/specs that the stock one flows as well as Aftermarket ones.
So that in mind just thinking of doing a shroud cut to allow Cold air into the stocker.
An issue i see tho is that cutting the shroud takes away from radiator flow thus running hotter and not allowing timing pull. Is this any concern or maybe I'm overthinking it, thxs paul
So that in mind just thinking of doing a shroud cut to allow Cold air into the stocker.
An issue i see tho is that cutting the shroud takes away from radiator flow thus running hotter and not allowing timing pull. Is this any concern or maybe I'm overthinking it, thxs paul
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
If you dont have Z51, you could try the "free air mod" by propping your
shroud open. You are also overthinking, as most true closed cold air
intakes use the cut shroud system and those folks engines do not
run hotter.
http://forums.corvetteforum.com/c6-t...gle-bolts.html
shroud open. You are also overthinking, as most true closed cold air
intakes use the cut shroud system and those folks engines do not
run hotter.
http://forums.corvetteforum.com/c6-t...gle-bolts.html
Thread Starter
Safety Car
Joined: Sep 2008
Posts: 4,296
Likes: 156
From: Location: Location: kAnSaS
If you dont have Z51, you could try the "free air mod" by propping your
shroud open. You are also overthinking, as most true closed cold air
intakes use the cut shroud system and those folks engines do not
run hotter.
http://forums.corvetteforum.com/c6-t...gle-bolts.html
shroud open. You are also overthinking, as most true closed cold air
intakes use the cut shroud system and those folks engines do not
run hotter.
http://forums.corvetteforum.com/c6-t...gle-bolts.html
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
I seem to recall, somewhere I think, of hearing some '09 owners claming surges or something similar after doing that mod. So just be aware of it (you should spread it apart about 3" for max results) and worse case, you can just close it. Good luck! 
PS-One of my good friends Dad owns a bunch of DQ's too-I was addicted for awhile to cotton candy blizzards.
PS-One of my good friends Dad owns a bunch of DQ's too-I was addicted for awhile to cotton candy blizzards.
Last edited by siffert; Nov 23, 2008 at 11:55 PM.
Safety Car
Joined: Jan 2008
Posts: 4,711
Likes: 3
From: Middle of No where AK
The stock one does flow pretty well but aftermarkets do flow better. Callaway, vararam, lingenfelter etc.. have pretty high numbers and usually result in 10 or more hp. But you wont run any hotter cutting the shroud. I run a vararam and have a cut shroud and didnt notice any change in engine temp.
Thread Starter
Safety Car
Joined: Sep 2008
Posts: 4,296
Likes: 156
From: Location: Location: kAnSaS
The stock one does flow pretty well but aftermarkets do flow better. Callaway, vararam, lingenfelter etc.. have pretty high numbers and usually result in 10 or more hp. But you wont run any hotter cutting the shroud. I run a vararam and have a cut shroud and didnt notice any change in engine temp.
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
You do NOT need to cut the shroud to do the wingnut mod!!! Do one or the other but not both!! Personally I would do the wingnut mod first as taking out or even cutting the shroud in place is a PIA!! btw-Vararam and others sell pre-cut shrouds.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Burning Brakes
Joined: Sep 2006
Posts: 1,038
Likes: 1
From: North York Ontario
I would not spend the money on a pre-cut one as it is getting it in and out that is the tough part, cutting is pretty easy once you get it out. Make sure there are no small children around when you are working on it as there will be a significant number of expletives that come out of your mouth during the process unless you happen to be a priest, nun or my mother.
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
However, I must disagree...as I would say even a priest or nun would be four letter foul mouthed if they were taking it out.
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
Yes, but you still have to cut out the shroud. Dont think its any better than the free cold air mod. Finally, except for true closed cold air systems like Vararam, Honker and Lingenfelter, all the rest still allow warm engine underhood air to enter those filters.
Instructor
Joined: Sep 2007
Posts: 234
Likes: 0
But none of those do anything to keep IAT temps down, and thats the biggest killer to performance when it starts to pull timing. Until I put on a new hood, the free air mod at least helps to keep the under hood temps down. The vararam does nothing for that.
Safety Car
Joined: Aug 2006
Posts: 4,206
Likes: 6
From: Makena, Maui & NM
???? I got a Honker clone now (Xcelerator) and my IAT's definately go DOWN to ambient while moving on the street. Naturally it does not do anything at idle or at stop. My last 1/4 mile run started at 77* and dropped down to 61* by the end of the quarter mile. In fact, that is THE point of having a closed cold air intake system. You can also change the IAT table in HP Tuner so it does not pull timing as well.
Instructor
Joined: Sep 2007
Posts: 234
Likes: 0
???? I got a Honker clone now (Xcelerator) and my IAT's definately go DOWN to ambient while moving on the street. Naturally it does not do anything at idle or at stop. My last 1/4 mile run started at 77* and dropped down to 61* by the end of the quarter mile. In fact, that is THE point of having a closed cold air intake system. You can also change the IAT table in HP Tuner so it does not pull timing as well.
Thats why i want a callaway supercharger hood, it directs air right to the throttle body. i had something similiar on my camaro from slp, and the iat temps were always super low. I'd rather the temps were really low, instead of risking a tune mod to ignore the problem.
Last edited by red06c6hm; Nov 24, 2008 at 08:38 PM.
Race Director
Joined: Apr 2008
Posts: 17,373
Likes: 6
From: Chatsworth California
