Anyone dyno w/ gutted stock cats?
#22
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Originally Posted by KCMO_HR_G
I have an '08 G35.
Thanks for the ignorant response and not reading a single one of my comments about why i'm considering this route.
dumb flaming trolls are worse than ricers IMO.
Thanks for the ignorant response and not reading a single one of my comments about why i'm considering this route.
dumb flaming trolls are worse than ricers IMO.
#23
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Doesn't anyone actually read the thread anymore? He has an extra set of cats to gut and wants to look stock. What a ricer, he wants to look stock and gain power.
Sorry I can't help you out with before and after dyno plots. I would go for it though, you don't have much to lose. As far as the rasp, I doubt there will be any with a stock G35 sedan exhaust.
Sorry I can't help you out with before and after dyno plots. I would go for it though, you don't have much to lose. As far as the rasp, I doubt there will be any with a stock G35 sedan exhaust.
#24
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Originally Posted by KCMO_HR_G
It just seems like the cat material and expansion into the cat filled chamber would slow down velocity more than having the large open space. At least you understand my primary concern... I should have just stayed on KCSR and debated this between the 2 of us
TK
#26
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Originally Posted by Hydrazine
Anyone:
Send me your gutted cats and I'll trade you a set of strup test pipes for them.
I will dyno the gutted cats against regular test pipes. Same day, same everything.
Send me your gutted cats and I'll trade you a set of strup test pipes for them.
I will dyno the gutted cats against regular test pipes. Same day, same everything.
#27
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Is it worth the noise though. Those hollow cans have to be resonating monstors when gutted.
Originally Posted by T_K
Despite some good points being made based on exhaust theory, what anyone can tell you at this point is just speculation. Due to the restrictive nature of the stock cats, better than older OEM cats, but still fairly restrictive, by removing all the innards you're going to gain CFM thats a given. CFM alone won't determine the effects on exhaust velocity, but it will flow better in the upper RPMs. I'd venture a guess and say you'd gain about the same numbers as test pipes above 5000 rpm. Below 5000 rpm, worst case scenario you lose a little bit of torque, best case scenario you don't. Even if you lose the low end, the overall result is going to be a faster car if thats the goal you're aiming for. If you already have the extra set of cats acquired for cheap, what have you got to lose?
TK
TK
#28
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Originally Posted by gothchick
+1.
As used Z's become older & less expensive, the younger ricer crowd grows in numbers, desecrating our precious Z. I wonder if the OP has an x02 anywhere on his Z to compliment his gutted cats? FTL.
As used Z's become older & less expensive, the younger ricer crowd grows in numbers, desecrating our precious Z. I wonder if the OP has an x02 anywhere on his Z to compliment his gutted cats? FTL.
If you have an extra set. You don't have anything to lose. Sure they cost soo much from the dealership. But on the board you will find them for MUCH LESS then that. Hell, I got mines for 60shipped.
Personally, I would rather have gutted cats. There more durable then most aftermarket brands. Keeps your car "stock", giving you less hassle from the cops and inspection. Also, its free. Just takes alittle time.
Yea, there not straight through design, but is it really gonna effect it THAT much. Would you say to buy an X brand TP to only gain a small amount of power over gutted cats? But in return you do lose the factors I stated earlier of gutted cats.
I guess its down to personal preference. Some people say "why don't you just buy TP,HFC,etc..."
I say why do that when you can gut your cats, and save some money for bigger mods.
#29
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Originally Posted by shiftdrift06
Personally, I would rather have gutted cats. There more durable then most aftermarket brands. Keeps your car "stock", giving you less hassle from the cops and inspection. Also, its free. Just takes alittle time.
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