406 takes Wally!
Pro
Joined: May 2002
Posts: 518
Likes: 17
Congrats on your Wally, though be aware that LT Headers are technically NOT legal in CA due to the non-factory O2 Sensor location (and CARB won't allow Heated O2 Sensors either), which might cause you to fail the visual? That said you'll probably find someone to help you out come smog time.
The exhaust plan for my 91 Z07 is to swap out the Factory Header for a 1/3/4" Shorty with AIR fittings (adapting the factory heat shields to that for camouflage), add two CATs where the Pup CATs are (again using factory heat shields for camouflage), and then gut the main CAT, and a CAT Back whatever after that. That should pass visual and be good for 450 CHP.
Doug
The exhaust plan for my 91 Z07 is to swap out the Factory Header for a 1/3/4" Shorty with AIR fittings (adapting the factory heat shields to that for camouflage), add two CATs where the Pup CATs are (again using factory heat shields for camouflage), and then gut the main CAT, and a CAT Back whatever after that. That should pass visual and be good for 450 CHP.
Doug
Originally Posted by GeosFun
Hi Guys,
The car gets 24 mpg on freeway and is clean for Ca emissions. Everything that shows has an EO#
I am a happy (old) boy!
The car gets 24 mpg on freeway and is clean for Ca emissions. Everything that shows has an EO#
I am a happy (old) boy!
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 914
Likes: 1
From: Redding Ca
Congrats on your Wally, though be aware that LT Headers are technically NOT legal in CA due to the non-factory O2 Sensor location (and CARB won't allow Heated O2 Sensors either), which might cause you to fail the visual?
You are absolutely correct. I still have my stock exhaust headers and precats to reinstall for the "visual" come emissions testing time next year. I also had a bolt/flange welded to where the headers connect to the main cat to make the switch easier every other year.
TJ Wong tested the emissions while I was at his place and the engine runs very clean, so I expect no problems with the stock headers and additional pre cats installed.
You are absolutely correct. I still have my stock exhaust headers and precats to reinstall for the "visual" come emissions testing time next year. I also had a bolt/flange welded to where the headers connect to the main cat to make the switch easier every other year.
TJ Wong tested the emissions while I was at his place and the engine runs very clean, so I expect no problems with the stock headers and additional pre cats installed.
Last edited by GeosFun; Oct 25, 2006 at 10:37 AM.
Safety Car
Joined: Sep 2003
Posts: 3,692
Likes: 5
From: Hayward CA
Originally Posted by Jim McCombe
WTG George!
In time, I just may have to drive up to Vancouver Washington and pay TJ Wong a visit unless I can find someone else here in the San Francisco Bay Area who can duplicate his work.
.
In time, I just may have to drive up to Vancouver Washington and pay TJ Wong a visit unless I can find someone else here in the San Francisco Bay Area who can duplicate his work.
.
Give this place a call - Precision Motive in Hayward 510-886-0789 - Pat is your man to talk to. Tell him Terrence referred you. They work on C1 - C4 Corvettes. They know these things like the back of thier hands. No need to drive to TJ......unless you really want to.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by GeosFun
Hi Guys,
Over the last couple years I have read some big power and drag performance numbers on CF, certainly bigger than mine, but in bracket racing, the fastest is not the key: a good RT, knowing how to dial in the car and a little treachery when called for is the rule.
Mainly this is just an "attaboy" to those of us who are a bit slower but still want to play.
There is hope for us and I have the Wally to prove it!
Over the last couple years I have read some big power and drag performance numbers on CF, certainly bigger than mine, but in bracket racing, the fastest is not the key: a good RT, knowing how to dial in the car and a little treachery when called for is the rule.
Mainly this is just an "attaboy" to those of us who are a bit slower but still want to play.
There is hope for us and I have the Wally to prove it!Keep up the good work.
RACE ON!!!
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 914
Likes: 1
From: Redding Ca
Wow, CFI. The ROC win is huge. That is as tough a competition as there is. I'll bet you wore a grin all the way to LV and home again. Very impressive! Then to back it up is awsome. Please do not come visit my track.
all the way to LV and home again. Very impressive! Then to back it up is awsome. Please do not come visit my track.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by GeosFun
Very impressive! Then to back it up is awsome. Please do not come visit my track.
RACE ON!!!
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Burning Brakes
Joined: Oct 2005
Posts: 824
Likes: 30
From: San Pablo California
Originally Posted by TM-96CE
Jim
Give this place a call - Precision Motive in Hayward 510-886-0789 - Pat is your man to talk to. Tell him Terrence referred you. They work on C1 - C4 Corvettes. They know these things like the back of thier hands. No need to drive to TJ......unless you really want to.
Give this place a call - Precision Motive in Hayward 510-886-0789 - Pat is your man to talk to. Tell him Terrence referred you. They work on C1 - C4 Corvettes. They know these things like the back of thier hands. No need to drive to TJ......unless you really want to.
Thanks Terrence for the referral. I believe you are talking about Pat Hendrix a long time Corvette racer and had no idea that Pat was into chip programing on the early C4's.
When I get ready, I will be sure to give him a call and tell him that you sent me. Does Pat have a dyno service there as well?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by Jim McCombe
And I had the pleasure of announcing your win at the then Sears Point Raceway. If my memory is correct, I believe your car was white in color???
Jim
Jim
RACE ON!!!
Safety Car
Joined: Sep 2003
Posts: 3,692
Likes: 5
From: Hayward CA
Originally Posted by Jim McCombe
Thanks Terrence for the referral. I believe you are talking about Pat Hendrix a long time Corvette racer and had no idea that Pat was into chip programing on the early C4's.
When I get ready, I will be sure to give him a call and tell him that you sent me. Does Pat have a dyno service there as well?
When I get ready, I will be sure to give him a call and tell him that you sent me. Does Pat have a dyno service there as well?
If it's a chip tune you need - there is a place past Sacramento that burns chips for 85-91 C4's - I can't remember the name of the place off hand. Shoot Caboboy (Tim) a PM - he had his car tuned there.
