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Old 06-28-2001, 05:48 PM   #10
over 40 five oh driver
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Join Date: Sep 1998
Location: Oklahoma City
Posts: 278
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I'm not sure why there is so much concern over passing emissions testing. I am in Harris County Texas (Houston), which has fairly strict sniffer tests, and I have passed emissions for years here with no problem. My previous car was a 91' LX Coupe with Edelbrock heads, GT-40 U/L, BBK 70mm TB, PRO-M 75mm MAF, and E-303 with shorty headers, BBK 2.5" H-pipe WITH catalytic converters, and Flow Master cat-back. Absolutely no problems passing emissions with 40 psi fuel pressure, 24 PPH injectors, and 14 degrees timing.

Current car passed with 106,000 mile motor with TFS-TW heads, Edelbrock Peformer U/L, 30# injectors, 65mm TB, PRO-M 80mm, and a custom grind Cam Motions "Solid Roller" cam with .561" lift int/exh, 230/236 duration @ .050" lift. This was with 42 psi fuel pressure, 15 degrees timing with FRPP shorty headers and Bassani X-pipe WITH catalytic converters, and Bassani cat-back. It passed in December 2000 with new Keith Craft 306, heads milled to bring up the CR to about 10.25:1, and CompCams XE274 with .555/.565" lift. It was so clean the guy thought his equipment was not hooked up properly so they ran the test again...same low numbers. They couldn't believe it! If you have the car in a good state of tune, good sensors, and run good set of cats...you should not have any problem at all passing even with the X-303.

As a side note, mine MAY run cleaner with the MSD-6AL also, but I cannot prove this. If the stock ignition system is in good shape, it should be fine on emissions testing also.

Hope this helps as far as what mods I had and how well I passed. I know other guys in the area also running real healthy 5.0's with more static CR and they too pass with no problems. Good luck...

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92'GT, Keith Craft Racing 306 (10.25:1 CR), PRO-M 80mm MAF,65MM TB, Edelbrock U/L intake,
TFS-TW heads milled/ported, CompCams XE274HR (.555/.565" lift w/1.6 rockers), A-351 adjustable roller rockers, 30# injectors,
Kirban FPR w/external pump, FRPP ceramic coated headers, Bassani X-pipe w/cats, Bassani cat back, Centerforce DF clutch/T.O. bearing...MSD 6AL w/MSD distributor, Steeda Tri axe, aluminum D/S, 3.73's, w/Factory Five U/L control arms. Lakewood 50/50 shocks. Steeda Front Drag swa
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