LS1s on roller smog testing?
06-25-2007, 09:13 PM
#1
LS1s on roller smog testing? For those of you who have had your LS1 cars for a while, how hard was it to get them to pass on a roller smog dyno a few years ago? Now it's just plug and play, but say an LS1 were to go in to a older vehicle that had to pass smog, do you guys remember how difficult it was to get them to pass with modification like after market cam shafts? I know what it takes on LT1s, far as cams you can and cant run and expect to pass. I imagine a smaller cam, with the emissions component working and cats would how ever pass. I recall Tony's old 382 passing Harris county roller smog testing, but i do recall back then the limits were a bit higher than they are now, if any one even has old smog results they could post, that would be great.
06-26-2007, 04:37 AM
#3
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Originally Posted by BizZzatch350
For those of you who have had your LS1 cars for a while, how hard was it to get them to pass on a roller smog dyno a few years ago? Now it's just plug and play, but say an LS1 were to go in to a older vehicle that had to pass smog, do you guys remember how difficult it was to get them to pass with modification like after market cam shafts? I know what it takes on LT1s, far as cams you can and cant run and expect to pass. I imagine a smaller cam, with the emissions component working and cats would how ever pass. I recall Tony's old 382 passing Harris county roller smog testing, but i do recall back then the limits were a bit higher than they are now, if any one even has old smog results they could post, that would be great.
06-26-2007, 11:39 AM
#6
Yea, they test by year of vehicle and not year of engine, for my 93 and your 94, it's technically easier, since they just need a VIN to enter, but thats not the route I want to go. I got the LT1 passing with LTs and cats, stock cam how ever, its nice to not have to worry. So any potential motor swap, I want the same. I have been around LT1s the last 7+ years, I know what can and cant pass, LS1s a bit different though. It's also been 6 or 7 years since they switched to the OBDII testing, the standards for passing on rollers is a lot different and more stricter.
Mike, 392RWHP is really good for the stock heads, isn't the B1 a relatively conservative cam?
Mike, 392RWHP is really good for the stock heads, isn't the B1 a relatively conservative cam?