JakeyLS1

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?

99Bluz28

iTrader: (35)

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!

99Bluz28

iTrader: (35)

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.

PREDATOR-Z

Stock manifold I would increase exhaust durations even further.
Like: 218 /230, .605/.604 115+3 LSA

smokeshow

iTrader: (17)

I tuned a 228/228 112 LS1 that passed emissions here in AZ. Can't say anything about cali though...

Tainted

iTrader: (9)

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

TMastGTO

Call TSP and ask about the 224/228 LSA 114. Also they could custom grind you something that would pass.

JakeyLS1

So basically anything with a lower intake and higher exhaust duration should pass? Also, what kind of power decrease does say a 222/226 have compared to a 228r?

redtan

iTrader: (5)

No, they're recommending that to you because you have the stock manifolds and should have a cam that's more oriented towards exhaust. That difference is not something magical that will pass inspection, just more for performance.

TMastGTO

I'm personally thinking about at this cam to run on the stock manifolds or shorties:
comp cam 54-444-11, XER273HR 224/230 LSA 114 .581/.588

99Bluz28

iTrader: (35)

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.

JakeyLS1

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.

PREDATOR-Z

At 4* positive overlap NO.

JakeyLS1

Well I'll have to see if I can find someone who will
Pass me before i put anything in. I would hate to regret going too small later on.

99Bluz28

iTrader: (35)

Yeah, I'd have to agree with PREDATOR-Z, I just don't see it happening.

JakeyLS1

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?

NVR_SPDS

iTrader: (39)

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.

JakeyLS1

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?

99Bluz28

iTrader: (35)

If your going to build it up into a track car, I'd go with the 4.10s since most run taller than stock rear tires.

JakeyLS1

Well it's going to be a dd/ weekend track car. I'm gonna get a set of DR's and I've heard that you will easily break the factory ten bolt with 4.10's