Going From Catted to Catless
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Going From Catted to Catless Mite be going from having my Catted Y to having and off road Y, cause im having to much ground clearance problems, question is, if i change to the off road y, do i need to get a new tune or not?
Not that we have our cars for gas mileage, but you will get a little better mileage with a tune after you go with the ORY. It will literally take the tuner 5 minutes, there are a couple of cat protection flags that will dump more fuel to protect cats. No cats = no reason to dump extra fuel, but it needs to be tuned out.
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Thread Starter
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Not that we have our cars for gas mileage, but you will get a little better mileage with a tune after you go with the ORY. It will literally take the tuner 5 minutes, there are a couple of cat protection flags that will dump more fuel to protect cats. No cats = no reason to dump extra fuel, but it needs to be tuned out.
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It really depends, I know a lot of guys with LT's that have catted Y pipes that had the rear 02s tuned out and pretty much just had the cats to reduce rasp. But it really all depends on the tune, and with high flow cats unless your making over 500 hp there really not going to be a restriction at all, and if you go ORY you MIGHT gain 2-5 hp. So its really not worth the re tune unless your throwing codes.
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Im building an exhaust setup for my 408 and I plan to use the 3" fake cats. We do not have emmissions here but I want it for the visual check.
With 4" mufflex exhaust I have read that there is no rasp so Im keeping my fingers crossed.
With 4" mufflex exhaust I have read that there is no rasp so Im keeping my fingers crossed.
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It really depends, I know a lot of guys with LT's that have catted Y pipes that had the rear 02s tuned out and pretty much just had the cats to reduce rasp. But it really all depends on the tune, and with high flow cats unless your making over 500 hp there really not going to be a restriction at all, and if you go ORY you MIGHT gain 2-5 hp. So its really not worth the re tune unless your throwing codes.
I should have been a little more clear in my post above. You do not need to have them tuned out, only if you want gas mileage very slightly better and maybe a tad more HP. Obviously the tuner would tune out the rear o2s as well.
If you do not care about the above, then there is no reason to have a tune done. The ONLY thing a rear o2 fault will do is fail you on emissions if you have to get the vehicle tested. Sims can fix this problem, but at that point you are probably close to the $$ amount of a simple retune. If you do not have emissions testing, you can drive around with the rear o2 faults all day long with no ill effects. However your SES light will be on, and it would be worth while checking it often in case another code were to pop up for other reasons
If you do not care about the above, then there is no reason to have a tune done. The ONLY thing a rear o2 fault will do is fail you on emissions if you have to get the vehicle tested. Sims can fix this problem, but at that point you are probably close to the $$ amount of a simple retune. If you do not have emissions testing, you can drive around with the rear o2 faults all day long with no ill effects. However your SES light will be on, and it would be worth while checking it often in case another code were to pop up for other reasons
Thread Starter
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I should have been a little more clear in my post above. You do not need to have them tuned out, only if you want gas mileage very slightly better and maybe a tad more HP. Obviously the tuner would tune out the rear o2s as well.
If you do not care about the above, then there is no reason to have a tune done. The ONLY thing a rear o2 fault will do is fail you on emissions if you have to get the vehicle tested. Sims can fix this problem, but at that point you are probably close to the $$ amount of a simple retune. If you do not have emissions testing, you can drive around with the rear o2 faults all day long with no ill effects. However your SES light will be on, and it would be worth while checking it often in case another code were to pop up for other reasons
If you do not care about the above, then there is no reason to have a tune done. The ONLY thing a rear o2 fault will do is fail you on emissions if you have to get the vehicle tested. Sims can fix this problem, but at that point you are probably close to the $$ amount of a simple retune. If you do not have emissions testing, you can drive around with the rear o2 faults all day long with no ill effects. However your SES light will be on, and it would be worth while checking it often in case another code were to pop up for other reasons
gotcha yea im still debating on wut to do lol
do you know if your original tune had the codes for the cats tuned out? I know a lot of people have them deleted from the PCM regardless of if they run aftermarket cats due to the sensitivity of the PCM with some aftermarket cats
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yea just found out the cats were tuned out anyways
