subject says all

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1988 IROC-Z 305TPI MINT!!
Mods= Accell SuperCoil, MSD 6A, Ported Plenum, No MAF Screans, K & N, SLP AirFoil,180 Thermostat+ Temp Switch, Relocated MAT, Cold Air. ,MSD Ignition wires and a few other misc goodies

1988 Pontiac Trans Am. 305 TPI Beyond MINT Condition. Dynomax Catback

 

I passed the CA emissions dyno with a Catco converter, gutted air pump, and no air tube going into the converter.

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1989 IROC-Z 5.7L

 

I passed the NJ emissions test with my "Products for Power" high-flow catalytic convertor.

Good issue, though. Hot Rod Magazine did a test a lonnng time ago on a big block V8. They tested emissions and horsepower with no cat, with a high-flow cat, and with a new GM stock cat.

The new GM cat came very close to the high-flow cat as regards power... the GM cat made about 2-3 HP less. However, the GM cat reduced the emissions much more than the high flow unit!

If I didn't pass NJ's dyno-emissions, I was going to spring for a new GM cat. Hot Rod explained how the new cat's are much less restrictive than they used to be, and that's why the GM cat made almost the same horsepower as the aftermarket high-flow one.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

I passed the metro Atlanta test

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-John
92 RS
-L03 305
-700R4 auto.
-2.73 peg leg
-GMPP open Air Element
-Hypertech Street Runner chip
-Hypertech under drive pullies
-R&R High Flow Catalytic Converter
-Flowmaster Catback Exhaust (with NO tips)
-K&N Crankcase breather
-Kenwood CD head unit
-Kenwood 6x9 speakers in rear.