Cams and there effect on emissions
Thread Starter
Senior Member
Joined: Aug 1999
Posts: 618
Likes: 0
From: Central, NJ
Car: 1989 IROC-Z
Engine: 350 Vortech Supercharged ZZ4 TPI
Transmission: T56
Axle/Gears: 3.73
Cams and there effect on emissions
If I were to throw a ZZ4 in my car with the more or less stock TPI on it...
would upgrading to the LT4 hotcam in that ZZ4 increase emissions? If so, by approx how much? My guess is that in NJ, a ZZ4 TPI may be able to pass, but cutting it really close. So would the LT4 hotcam hurt even more?
------------------
1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech chip with 160stat, MSD 6A, Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)
Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell 24# injectors
1989 Chevrolet Celebrity Eurosport <--DEAD AS OF 9/21/01
2.8 MPFI, no mods
225,000 miles and still ticking!
More info and pics on my webpage:http://go.to/iroc-z
AOL IMer: GPA 0point0
[This message has been edited by L98IROCZ89 (edited September 25, 2001).]
would upgrading to the LT4 hotcam in that ZZ4 increase emissions? If so, by approx how much? My guess is that in NJ, a ZZ4 TPI may be able to pass, but cutting it really close. So would the LT4 hotcam hurt even more?
------------------
1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech chip with 160stat, MSD 6A, Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)
Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell 24# injectors
1989 Chevrolet Celebrity Eurosport <--DEAD AS OF 9/21/01
2.8 MPFI, no mods
225,000 miles and still ticking!
More info and pics on my webpage:http://go.to/iroc-z
AOL IMer: GPA 0point0
[This message has been edited by L98IROCZ89 (edited September 25, 2001).]
Supreme Member
Joined: Sep 1999
Posts: 3,197
Likes: 10
From: Manassas VA
Car: 04 GTO
Engine: LS1
Transmission: M12 T56
A properly running ZZ4 will run as clean as a stock engine.
Even w/ the LT4 hot cam it should still be able to get through pretty easily as long as it is dialed in right, especially with a good set of cats.
------------------
Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
305 TPI A4 2.73 - 14.8 @ 93.1
Stock except ported plenum and dual cats
-=ICON Motorsports=-
- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die
Even w/ the LT4 hot cam it should still be able to get through pretty easily as long as it is dialed in right, especially with a good set of cats.
------------------
Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
305 TPI A4 2.73 - 14.8 @ 93.1
Stock except ported plenum and dual cats
-=ICON Motorsports=-
- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Buddy here has the ZZ3 (same as ZZ3 except pistons, rods, oil pan) w/ZZ9 cam, 1.6 rockers, Big Mouth intake, SD system, bunch of other stuff. Kept the crate exhaust manifolds, converted to dual cats. Custom chip, AFPR, 19 lb injectors.
He passed the dyno emissions here with fast pass (shortened test for vehicles that start the test with low emissions).
He did need to plumb exhaust up to the intake for the EGR, since the ZZ3/ZZ4 heads do not have the exhaust cross-over passage.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
He passed the dyno emissions here with fast pass (shortened test for vehicles that start the test with low emissions).
He did need to plumb exhaust up to the intake for the EGR, since the ZZ3/ZZ4 heads do not have the exhaust cross-over passage.
------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. 2-1/2" cat-back, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 CC system w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker 2055 headers, 3" Catco cat & 3" catback, restalled TC, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Holley 750VS w/4150 conversion, GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
Dec 10, 2019 07:07 PM
Hotrodboba400
Firebirds for Sale
0
Sep 2, 2015 07:28 PM
