Is it worth it to convert to dual cats????
#1
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Location: E. Patchogue, NY
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Car: '90 Iroc
Engine: 305 TPI
Transmission: 5 spd
Is it worth it to convert to dual cats????
I'm gonna be doing full exhaust over my spring break and I'm wondering if the power gains from going to dual cat headers would be worth it? I plan on starting to build a 400+ hp 355 by the end of the summer so I'll want to use the exhaust I'm going to get on that motor also. Would it be worth the extra effort and expense to get dual cats now in preperation for the motor? Whether single or dual cats, I'll be getting SLP 1 3/4" headers. So what do you guys think? What diameter are the pipes in the single cat setup and dual cat setup? Thanks.
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Factory dual cats are 2-1/4" OD, single 3". If you figure in wall thickness, the flow area of the duals is slightly more than the single. That is ignoring boundry effects on flow, and any flow restrictions induced by y's, bends, etc.
If you went with dual 2-1/2", it's no contest - duals win.
If you went with dual 2-1/2", it's no contest - duals win.
#3
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GM makes new N10 dual catalytic converter exhaust available, freeing up 13% more power from some LB9 and L98 equipped Trans Am's.
from http://pontiac.sk/history.php
so factory dual cats helped out a bit..
from http://pontiac.sk/history.php
so factory dual cats helped out a bit..
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If I were you I'd just run no cats, unless you need them of course. If you really think you will be making 400+ hp, then you'd probably benefit more from dual exhaust. I'd recommend it. With dual exhaust you'd obviously be running dual cats too.
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