228R Cam and Emissions
Thread Starter
Staging Lane
Joined: Nov 2011
Posts: 57
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From: West Valley, Utah
228R Cam and Emissions I am considering swapping the Texas Speed 228r cam in to my 2000 z28 with an M6. It still has the factory manifolds with cats and an SLP LM1. My question is, will it pass emissions with either the 114 or 112 LSA? I live in Utah, anyone passed with this cam or one bigger with the emissions specs in my area?
I don't really know what the emission standards are Utah, or how they compare to California, but a 228r 114lsa has 0* overlap and 4* overlap on the 112lsa. In CA. you would need the 228r to have a 116lsa (-4* overlap) to pass.
IMO, I wouldn't run a 228r with a wide 116lsa, Id go with a smaller cam first!
IMO, I wouldn't run a 228r with a wide 116lsa, Id go with a smaller cam first!
Last edited by 99Bluz28; May 1, 2012 at 02:51 AM.
After a little searching it look's like Utah has adopted the California standards, so I'd forget about getting the 228r. I'd suggest going with a 224/224 114lsa (-4* overlap) or smaller.
Since you're running the stock manifolds I go with a cam with more exhaust duration, like a 222/226 114lsa (-4*), or a 220/224 113lsa(-4*), a 220/228 114lsa (-4*) .
Or, any of the other cam I already recommended to you.
Since you're running the stock manifolds I go with a cam with more exhaust duration, like a 222/226 114lsa (-4*), or a 220/224 113lsa(-4*), a 220/228 114lsa (-4*) .
Or, any of the other cam I already recommended to you.
Last edited by 99Bluz28; May 1, 2012 at 01:19 PM.
No,
I had a 228R in my T/A and it wouldnt pass NC inspection. I was even told a 224R would be hard pressed to pass without perfect tuning with a slight bit of luck as well.
Take $50 with you when you go to get tested and just kinda hint around for someone to "overlook" a few things, thats what I did
I had a 228R in my T/A and it wouldnt pass NC inspection. I was even told a 224R would be hard pressed to pass without perfect tuning with a slight bit of luck as well.
Take $50 with you when you go to get tested and just kinda hint around for someone to "overlook" a few things, thats what I did
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So basically anything with a lower intake and higher exhaust duration should pass?
You're going to have a lower power band so you'll have less top end power than the 228r, but you have better low end power. If you really want to maximize your power & pass SMOG, have your heads ported/milled with a smaller cam.
Last edited by 99Bluz28; May 1, 2012 at 01:56 PM.
Thread Starter
Staging Lane
Joined: Nov 2011
Posts: 57
Likes: 0
From: West Valley, Utah
Do you think that with an awesome tune a 228r would pass SMOG? I plan on doing 5.3l heads and full exhaust in the future. But for about a year I need to DD it.
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Thread Starter
Staging Lane
Joined: Nov 2011
Posts: 57
Likes: 0
From: West Valley, Utah
So until I can afford to buy a car to DD, I think i'll just do gears and some Drag Radials. Im thinking 3.73's or 4.10's. I'm mainly building the car for the track, but as i said before i need to daily drive it until i can buy a new DD. Will 3.73's make much of a difference or should i go with like 3.90's?
I passed cali smog easily with a 224R, and it made good power, even through stock manifolds/cats, SLP Y pipe, and LM1.
Through an unlocked, stalled auto, and 3.73s, I made 350/352 on a dynapack dyno.
Through an unlocked, stalled auto, and 3.73s, I made 350/352 on a dynapack dyno.
Thread Starter
Staging Lane
Joined: Nov 2011
Posts: 57
Likes: 0
From: West Valley, Utah
Well I'm 18 YO and I don't exactly have money to blow. So until I can afford heads I'm going to have to slowly work towards making it track ready. Any thoughts on 3.90
Gears?
Gears?