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CAI will decrease performance w/ stock exhaust? #177034 May 11, 10:50pm May 11, 10:50pm
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Erick OP
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CAI will decrease performance w/ stock exhaust?
So will a (AEM) CAI decrease Performance w/ stock exhaust??

I came across this thread:
GreyStreet posted
request...how a CAI will make a GT sound

and some members said it would and some said it wouldn't decrease Performance with a stock exhaust?? confused


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Re: CAI will decrease performance w/ stock exhaust? [Re: Erick] #177035 May 12, 12:52am May 12, 12:52am
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From personal experience I would say no. I have a GT when I put mine on I just had the stock exhaust & I could tell right away that the Performance was better. By better I mean more low end torque and a lil more HP that you could feel. Not a whole bunch but enough that you can tell the difference.

Re: CAI will decrease performance w/ stock exhaust? [Re: ReX] #177036 May 12, 1:04am May 12, 1:04am
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read what i said in the other thread...

Re: CAI will decrease performance w/ stock exhaust? [Re: spaztikid] #177037 May 12, 1:23am May 12, 1:23am
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What spaztikid said in the other thread thumbsup

Originally Posted by Eyger
Im not 100% sure, but I don't think it's a wise idea to put a cold air on your car with the stock exhaust. I would believe that it could decrease Performance due to the fact that you are taking in more air than you can put out. I think you should get an exhaust first!


Originally Posted by spaztikid
thats not true...


and as for the sound... deep.


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Re: CAI will decrease performance w/ stock exhaust? [Re: Erick] #177038 May 12, 1:23am May 12, 1:23am
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alright sounds good then..just was feeling a tad bit worried that a decrease in Performance would actually happen..

thanks thumbsup


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Re: CAI will decrease performance w/ stock exhaust? [Re: Erick] #177039 May 12, 4:13am May 12, 4:13am
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it won't decrease Performance. if you need proof..i have a few dynos of celicas with only CAI's and as you will see..there is a slight torque increase and a slight whp increase, definately not a decrease thumbsup

Re: CAI will decrease performance w/ stock exhaust? [Re: Erick] #177040 May 12, 4:14am May 12, 4:14am
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here is one of a celica gts with only an AEM CAI:

1869985057-aemcai.jpg
Re: CAI will decrease performance w/ stock exhaust? [Re: Speed4TheNeed] #177041 May 12, 4:16am May 12, 4:16am
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and here's another with only the Injen CAI:

1869985058-injencai.jpg
Re: CAI will decrease performance w/ stock exhaust? [Re: Speed4TheNeed] #177042 May 12, 7:41am May 12, 7:41am
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No, it will not decrease Performance. I recently put in an AEM CAI on my auto GT, still running with the stock exhaust. I immediately noticed a difference in hp and torque beginning at around 3500 RPMs. Also, the higher the RPMs you go, the louder and sweeter it sounds. thumbsup


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Re: CAI will decrease performance w/ stock exhaust? [Re: GQ540] #177043 May 12, 7:46am May 12, 7:46am
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i think what people mean by decrease is that somemtimes Intakes bog even CAI systems and there are some dips in the power band compared to stock...but this is neglegible...mid-hi range CAI have been proven Performance-wise! thumbsup


Originally posted by SKOOF:
yoru such a clown, i wish you lived in nyc, i would love to just give you the beating that youve probably never gotten in your life.
Re: CAI will decrease performance w/ stock exhaust? [Re: ct] #177044 May 12, 8:42am May 12, 8:42am
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alright the proof is there.. I'll go with that

I'll save those dynos for future reference grin

thanks all thumbsup


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Re: CAI will decrease performance w/ stock exhaust? [Re: ct] #177045 May 12, 9:11am May 12, 9:11am
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Originally Posted by ct
i think what people mean by decrease is that somemtimes Intakes bog even CAI systems and there are some dips in the power band compared to stock...but this is neglegible...mid-hi range CAI have been proven Performance-wise! thumbsup
the bogging seems to have to do with the placement of the maf. you'd think AEM, Injen and the rest could do better "engineering" to prevent this. they probably believed the problem is so minor they felt the positives outweigh the negatives.


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Re: CAI will decrease performance w/ stock exhaust? [Re: JAIMEJAMES] #177046 May 12, 9:21am May 12, 9:21am
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Originally Posted by JAIMEJAMES
Originally Posted by ct
i think what people mean by decrease is that somemtimes Intakes bog even CAI systems and there are some dips in the power band compared to stock...but this is neglegible...mid-hi range CAI have been proven Performance-wise! thumbsup
the bogging seems to have to do with the placement of the maf. you'd think aem, injen and the rest could do better "engineering" to prevent this. they probably believed the problem is so minor they felt the positives outweigh the negatives.


this is true...blue bomber from NC has resolved this with a CAI modification...people have tried it with amazing results. thumbsup


Originally posted by SKOOF:
yoru such a clown, i wish you lived in nyc, i would love to just give you the beating that youve probably never gotten in your life.
Re: CAI will decrease performance w/ stock exhaust? [Re: Erick] #177047 May 12, 10:40am May 12, 10:40am
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Quote:
[i]Originally posted by Erick]
What [b]spaztikid
said in the other thread thumbsup

Quote:
[b][i]Originally posted by Eyger]
Im not 100% sure, but I don't think it's a wise idea to put a cold air on your car with the stock exhaust. I would believe that it could decrease Performance due to the fact that you are taking in more air than you can put out. I think you should get an exhaust first!


Quote:
[b][i]Originally posted by spaztikid]
thats not true...


and as for the sound... deep.


How can an engine suck more in then it let out?? confused
Piston goes down and pushes the gasses out.
Piston goes up and sucks the gasses in.

Or am I wrong.

An aftermarket exhaust can reduce restrictions --> little more flow.
An aftermarket Intake can reduce restrictions --> more flow.

And thus it creates more power (but it is not much, unless the stock Intake and exhaust had a lot of restrictions).

BUT if the exhaust can not remove the gasses quick enough it could be possible that the engine can not suck more air in (even with an aftermarket Intake) and thus it would not create more power. I'm not saying this is with a GT but it could be possible. Just find out what the bottleneck of the 1zz engine is.

Re: CAI will decrease performance w/ stock exhaust? [Re: Speed4TheNeed] #177048 May 12, 3:20pm May 12, 3:20pm
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Originally Posted by sPeEd4tHeNeEd
here is one of a celica gts with only an aem cai:
I think they may need to check the machine they used to get these results, or perhaps the dyno is a fake, but 10 horsepower increase after adding a CAI? wtf


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Re: CAI will decrease performance w/ stock exhaust? [Re: CelicaTC] #177049 May 12, 3:26pm May 12, 3:26pm
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Originally Posted by CelicaTC

How can an engine suck more in then it let out?? confused
Piston goes down and pushes the gasses out.
Piston goes up and sucks the gasses in.

Or am I wrong.

An aftermarket exhaust can reduce restrictions --> little more flow.
An aftermarket Intake can reduce restrictions --> more flow.

And thus it creates more power (but it is not much, unless the stock Intake and exhaust had a lot of restrictions).

BUT if the exhaust can not remove the gasses quick enough it could be possible that the engine can not suck more air in (even with an aftermarket Intake) and thus it would not create more power. I'm not saying this is with a GT but it could be possible. Just find out what the bottleneck of the 1zz engine is.



our stock exhausts can let enough air flow... you can have a Turbocharged celi and stock exhaust and it will still flow the air...

aftermarket exhausts are just less restrictive.

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