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For all intents and purposes, wouldn't a top of the line 3 inch high flow cat fee up as much power as the factory dual cats did???
I'm just thinking outloud how for a second there a few months ago I was thinking about converting my car to dual cats but I figured a 3 inch high flow would flow as much as 2 factory cats would....
__________________ www.TheFoat.com/92GTA1992 Trans Am GTA SLP: GMPP optioned "SLP Performance Parts Package" GTA, 220K Miles, Dark Jade Gray Metallic, LB9, 4L60, T-Tops, and Gray Leather. Documentation includes Window Sticker, Factory Invoice, Etc.
I would think you are right. The facory cats on mine were, I think, 2.25". A single 3" aftermarket would almost have to flow better, just by the less resistance on the walls of the pipe.
__________________ Joshua Johnston
1991 Z-28 -- SOLD
1985 C-10
Exactly, that and the fact that the new one is high flow and not the restrictive factory cat.....
__________________ www.TheFoat.com/92GTA1992 Trans Am GTA SLP: GMPP optioned "SLP Performance Parts Package" GTA, 220K Miles, Dark Jade Gray Metallic, LB9, 4L60, T-Tops, and Gray Leather. Documentation includes Window Sticker, Factory Invoice, Etc.
I called random tech a few days ago. They told me that a good 3" flows around 500cfm, and that a good 2.25" flows around 300cfm. So I gues a pair of stock-sized 2.25" would flow around 600cfm....
For whatever it's worth.....
__________________ 1991 Z28
L98/G80/G92/J65
LT1 injectors, DIY PROM, t-56, AS&M siamese runners, accel intake, F1 GS-D3's
* 14.46 @ 93.36mph, 1.98 60' 7/5/02 (stock)
* 14.89 @ 96.76mph, 2.51 60' 7/7/04 (T56, AS&M SS runners, accel intake)
...guess I need to work on that rear suspension! 1971 RS
406/4spd...a work in progress..
in the 13's @ 107mph without a posi, it's a start.
