noob exhaust question - Toyota Nation Forum : Toyota Car and Truck Forums

93XLEcamry · 01-19-2009, 02:43 AM

does anyone know how big the stock inlet is for the gen 3 cam. specifically for a v6 xle (if it makes any difference)

i wanted to get a new exhaust but was not sure about the inlet

is 2.5 inlet too big for the stock piping or it doesn't matter

bigbird · 01-19-2009, 04:42 AM

inlet? im not sure for what part of the exhaust your asking. the OEM size for most of the exahust is about 2".

Fiox789 · 01-19-2009, 09:04 PM

Yup 2 is the right size.

***toyomoho*** · 01-19-2009, 10:31 PM

Concur.

93XLEcamry · 01-20-2009, 11:40 AM

ty guys...so if i got an exhaust that has an inlet of 2.5 the shop can still weld it on right? or do i need to buy the whole piping (im thinking catback) so they can fit it in?? because i dont want to go to the shop and the machanic goes "your stock pipe is 2' and your new exhaust inlet is 2.5 so we need to replace everything" i dont want to get ripped off if it is still possible to weld the new exhaust on to the stock piping.. thanks

N35QU!K · 01-20-2009, 12:21 PM

Should be perfectly doable. If I can have my piping between the cat and the muffler cut out and replaced with bigger piping, then I can't see why they can't adapt the stock pipe to a larger muffler inlet.

If they tell you otherwise, then they're obviously trying to make you spend more money than you need to, given what you want to do.

93XLEcamry · 01-20-2009, 12:47 PM

ty N35QU!K....

now on to my next noob questiong

i ordered a 3' dual exhaust (by accident), thought it was going to be 2.5, but once i looked at it carefully it says 2.5 inlet not tip

so the question is......would i lose any hp what so ever because the exhaust is too big....or it doesnt really matter....

'_' · 01-20-2009, 01:48 PM

I'm not sure what you're saying about the size of the muffler you ordered. So it ended up being 2.5"? In regards to your exhaust piping question, you don't want to be running a diameter too big or too small. You will lose power if the diameter is too large because the purpose of the piping is to remove the heat and exhaust gases away from the engine as quickly as possible. When the piping is too large, there is less pressure to move the gas out, and if it's too small, the exhaust system is too restrictive. If 2" is your OEM piping diameter, I think you should be okay with 2.25" or 2.5" at the most. Keep in mind the larger the piping, the louder the exhaust. I have the i4 and have noticed that I lost low end power because of the increase to 2.25".

93XLEcamry · 01-20-2009, 01:55 PM

thanks...what i meant to ask was if i got dual 3 inch would i lose any low end power

N35QU!K · 01-20-2009, 02:09 PM

Quote:

Originally Posted by '_'

I'm not sure what you're saying about the size of the muffler you ordered. So it ended up being 2.5"? In regards to your exhaust piping question, you don't want to be running a diameter too big or too small. You will lose power if the diameter is too large because the purpose of the piping is to remove the heat and exhaust gases away from the engine as quickly as possible. When the piping is too large, there is less pressure to move the gas out, and if it's too small, the exhaust system is too restrictive. If 2" is your OEM piping diameter, I think you should be okay with 2.25" or 2.5" at the most. Keep in mind the larger the piping, the louder the exhaust. I have the i4 and have noticed that I lost low end power because of the increase to 2.25".

I bet the same thing happened to me... I was just too distracted by the sound to notice, haha. That aside, 2.25" seems to be the magic number. guys like TonytheTiger are running 3" piping, but that's because they have ridiculous turbo setups, which, is most cases, overcome suppressed low-end torque.

93XLEcamry · 01-20-2009, 02:13 PM

in summary...im screwed....lol......talk about shooting yourself in the foot

isnt there any positive in having a 3' exhaust tip though????

N35QU!K · 01-20-2009, 02:21 PM

Quote:

Originally Posted by 93XLEcamry

in summary...im screwed....lol......talk about shooting yourself in the foot

isnt there any positive in having a 3' exhaust tip though????

OH, exhaust tip? My bad, I thought you were talking about 3" piping. Is it a dual exhaust, or is it a single muffler with two tips?

93XLEcamry · 01-20-2009, 03:54 PM

its 3' dual tip single exhaust...does that make any difference if its 3' or 2.5'

JBlacks · 01-20-2009, 04:41 PM

ok your posts are kind of confusing. ive messed with the exhaust on mine a bit already, now do u have 3 inch piping back to the muffler then 3 inch inlet and out let on the mufler going to a dual tip exit? if so when i did my cat delete it was 2.5 inch piping and im assuming it is 2.5 after the cat as well into the muffler. Any exhaust shop should be able to make it work with a simple 2.5 to 3 inch section then your cat back from there. Hopefully i understood what you were saying and that this helped.

93XLEcamry · 01-20-2009, 06:14 PM

thanks for your reply

but its 2.5 inlet leading in single dual 3 inch