[Z06] California Question
Thread Starter
Instructor
Joined: Jan 2012
Posts: 242
Likes: 7
From: Fair Oaks, CA
California Question
I have a 2003 Z with 25000 mi. Calloway Honker, FAST manifold. Stock exhaust and heads. I am interested in installing a cam for a HP bump. Would like to put LT headers on, but I don't believe I would pass CA smog. I was told short tube headers would pass. My question is:
1. What would be a good cam and roughly how much hp increase?
2. Would short tube headers be worth it. Any HP increase there?
Your opinions are important to me. Thanks.
Dave
1. What would be a good cam and roughly how much hp increase?
2. Would short tube headers be worth it. Any HP increase there?
Your opinions are important to me. Thanks.
Dave
Supporting Vendor
Joined: Sep 2013
Posts: 3,085
Likes: 1,252
From: Harbor City California
I have a 2003 Z with 25000 mi. Calloway Honker, FAST manifold. Stock exhaust and heads. I am interested in installing a cam for a HP bump. Would like to put LT headers on, but I don't believe I would pass CA smog. I was told short tube headers would pass. My question is:
1. What would be a good cam and roughly how much hp increase?
2. Would short tube headers be worth it. Any HP increase there?
Your opinions are important to me. Thanks.
Dave
1. What would be a good cam and roughly how much hp increase?
2. Would short tube headers be worth it. Any HP increase there?
Your opinions are important to me. Thanks.
Dave
2) no the Z manifolds flow almost as well as a pair of shorty's.
We have full turn key camshaft packages (even includes the Dexcool and oil) installed for $2,000
We like to custom spec our camshafts for each individual customers application
Burning Brakes
Joined: Feb 2013
Posts: 749
Likes: 13
From: SoCal CA
I have a 2003 Z with 25000 mi. Calloway Honker, FAST manifold. Stock exhaust and heads. I am interested in installing a cam for a HP bump. Would like to put LT headers on, but I don't believe I would pass CA smog. I was told short tube headers would pass. My question is:
1. What would be a good cam and roughly how much hp increase?
2. Would short tube headers be worth it. Any HP increase there?
Your opinions are important to me. Thanks.
Dave
1. What would be a good cam and roughly how much hp increase?
2. Would short tube headers be worth it. Any HP increase there?
Your opinions are important to me. Thanks.
Dave
Have you passed smog with the honker CAI installed? I called Calloway, and they told me that the CARB# doesn't apply to Z06 models. I was hoping to install the honker also, but held off because of smog fears.
Melting Slicks
Joined: Aug 2013
Posts: 2,491
Likes: 315
St. Jude Donor '15-'16-'17-'18-'19-'20-'21-'22
http://www.arb.ca.gov/msprog/aftermk...es/amquery.php
Supporting Vendor
Joined: Sep 2013
Posts: 3,085
Likes: 1,252
From: Harbor City California
We keep stock air boxes and other stock Smog stuff in our storage for our customers that need to "switch back" for the testing.
Pro
Joined: Jul 2007
Posts: 590
Likes: 23
From: Orangevale Ca.
You can find info on CARB legal equipment at the following website:
http://www.arb.ca.gov/msprog/aftermk...es/amquery.php
http://www.arb.ca.gov/msprog/aftermk...es/amquery.php
it only pertains to the 2001 LS6.
i've had my Honker on since '07 (2002 Z06) and have never had a smog station question it or ask for the sticker, so....gonna keep my fingers crossed
Melting Slicks
Joined: Aug 2010
Posts: 2,855
Likes: 78
From: Sammamish WA
WA Events Coordinator
FYI - it is possible to find some smog shops in CA that don't look at the goodies, but just do the actual smog test...as it should be. I had one when I lived down there.
Last I heard they are supposed to move to reading codes only on OBD2 cars starting next year, don't know if that is still true. Thats what they do up here in WA.
Last I heard they are supposed to move to reading codes only on OBD2 cars starting next year, don't know if that is still true. Thats what they do up here in WA.
Burning Brakes
Joined: Dec 2003
Posts: 1,243
Likes: 5
From: Loveland CO
Alternative option to LT headers are LS7 Exhaust manifolds/cat pipes. will need a tune.. they are OEM parts so you will have OEM numbers to read.. i have them on my car and gained simmilar HP numbers as LT headers but lower TQ numbers. I added the AIR injection to my LS7 manifolds but you can remove them and tune out the codes if you dont want the AIR system. OR add dummy flanges to the manifold to make it look factory. search my posts you will find what i did and others have done. they are MUCH better then shorty headers and stealthy because they are GM parts.
LS7 exhaust H-Pipe will also need to be adapted to the mufflers with a reducer, the H-pipe is 3" rather then 2.5" like stock.
S
LS7 exhaust H-Pipe will also need to be adapted to the mufflers with a reducer, the H-pipe is 3" rather then 2.5" like stock.
S
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Thread Starter
Instructor
Joined: Jan 2012
Posts: 242
Likes: 7
From: Fair Oaks, CA
RedZ….the LS7 stock headers are an interesting alternative. I will research it further, thanks. John8642….yes, I have passed with no problem before at Smog and Go. Understand, I sanded off the FAST logo and repainted the manifold black like the OEM manifold. They never questioned it.
Thread Starter
Instructor
Joined: Jan 2012
Posts: 242
Likes: 7
From: Fair Oaks, CA
Need a good shop
I'm looking for a good shop to do some work on my 03Z. I live in Elk Grove, CA., so somewhere with in a 30mi radius of Sacramento. First thing on the list is pulling the FAST manifold and check knock sensor wires for short. Than maybe some cam and head work later on.
Anyone know anything about Corvette Care in Rancho Cordova? I have heard some good feedback on them.
Dave
Anyone know anything about Corvette Care in Rancho Cordova? I have heard some good feedback on them.
Dave
Burning Brakes
Joined: Feb 2013
Posts: 749
Likes: 13
From: SoCal CA
Madmatt9471 has a very good write up on installing the LS7/ZR1 exhaust system.
http://forums.corvetteforum.com/c5-f...-b-fusion.html
http://forums.corvetteforum.com/c5-f...-b-fusion.html