jimmyblue

iTrader: (11)

Slogging through the California Air Resources board EO pages
I find this EO number includes >> Long Tube << headers for the
LS-1 F-body (at least '98-'99).

http://arb.ca.gov/msprog/aftermkt/de...o/D-215-58.pdf

Check the Exhibit A - long tube headers, middle of page 7 !

Ahh, but it looks like maybe these are not really "long tubes"
as we think of them, but really just Edelbrock's "tubular
exhaust system" that comes in around shorty length and
is semi-mislabeled in the EO???

LS-1 headers w/ CARB EO coverage I have found:

Edelbrock shorties 6573, 65730, 65731
Edelbrock long tubes 6672
Hooker shorties 2077
JBA shorties 1807, 1816, 1817

MAC has qualified FORD mid-lengths but not GM
BBK has qualified FORD products but not GM

There are number of mfrs which appear to have exempted long
tube headers for trucks (maybe the emmisions rqmts are easier?).

http://www.arb.ca.gov/msprog/aftermk...es/amquery.php

From reading the verbiage in these EOs it appears they can be
obtained through some scientific tailpipe testing and maybe the
LS-1 aftermarket companies need some more pressure to get
with the program. If one long-tube header can make it and
MAC can get Ford stuff exempted then I reckon they should
be able to get the GM ones through the drill. Maybe we need
a letter-writing / email campaign?

Trojan T/A

iTrader: (1)

The long tubes and mids will never get an EO because they relocated the cats further down the exhaust making them less effective. The Edelbrock TES system for the 98-99s is the shorties with a connector pipe from the passenger side manifold to the cat which is underneath the passenger seat. In 2000, GM moved both cats close to the manifolds so the TES doesnt need to be there for the later years. If a 98-99 wanted to have 1 longtube on the passenger and a shorty on the driver, it could get a EO, but it would look weird and wouldnt work right.

As for the trucks getting longtubes with EOs, I'd bet its because the cats on trucks are much further down the exhaust.

jimmyblue

iTrader: (11)

Yeah, but I guess my question is why a mid-length -couldn't-
make it, when there are EO'd mids for other cars and the trucks
seem to have passed even further away. I think MAC and
Bassani just haven't bothered to try.

RPM WS6

iTrader: (3)

I don't think you'll see any of the current LS1 LT makers bother to mess with trying to get CARB numbers. Why? First, I'm not even sure if they could slip by the 'relocating the cats' deal unless they paid to perform an FTP (federal test procedure, which costs about $2K per test) and could show that emissions were not impacted in any way from the original manufacturer's FTP tests. Even if they paid for the test, I doubt the LTs would pass that criteria as the cats are infact less efficent at doing their intended job when further down the exhaust stream (just cause they pass state tests doesn't mean the stockers don't pass better ). Remember, we're not talking about a regular emissions test here, FTP testing is very intense, and actually simulates full driving cycles (cold starts, warm starts, driving, etc.) for engine/chassis configurations. It is the certification that all cars sold in the US must pass before hitting the market, way more strict than anything the state tests throw at us. I doubt any catted LT could do as well or better than the stock setup.

And second, because only CA people need CARB numbers to pass inspections, and since the CA people are buying them anyway, there is little to no extra profit to be made by messing with trying to get CARB approval. The only way this would change, is if one manufacturer manages to get the CARB number, then the competition will need to follow otherwise they will lose all or most of their CA sales to the one CARB approved brand.....

Persoanlly, I just think CA needs to stop being a dick to hobbyists and drop this crap already....

VaNDaL*SS*

iTrader: (1)

boy do i ever second what he just said

VaNDaL*SS*

iTrader: (1)

**** i even talked to the guys at qtp about their lt's and they said it would pass the sniffer test if properly tuned... isnt that what counts i think it is bs that just cuz of the visual i would fail the test even though the emissions are of satisfactory

highgear

My 98 has a Cat just below the head-pipe connection on the passenger side and driver side is way down stream. (Factory stock)
So, how can CARB say one can't be moved further down stream like the other one. Puttin on LT's would just move one Cat to match the other one.

jimmyblue

iTrader: (11)

How can CARB???

'Cause they're in the business of saying "no" and
have nothing to gain from saying "yes", and they
are populated by people who hate cars let alone
hot rods?

Just a guess.