Okay well I've been told CAI on a v8 is about worthless because it heats up fast. But i've also heard if you change your TB it helps get more performance out of the CAI. Can you guys set me straight here?

 

a CAI is not worthless, it is just not worth the price it costs. Whoever told you that a v8 heats up to fast is an idiot, all motors produce heat. My girlfriends old honda got just as hot as my moms 5.4l truck or my 4.6l, or my 5.0 for that matter.

All you need to do is swap the factory filter out with a K&N to get more airflow. That is it. Unless you want the looks of a CAI the gains are slim to none.

 

+1, I am also compelled to once again point out that the OEM intake is a CAI and a pretty good one at that--much better than any constant I.D. piece of pipe, regardless of how pretty it is...

Beyond all of this, without a tune neither an after market CAI K&N filter, or TB & plenum will add anything other than a more "racy" sound. Save up and get a tuner, then bump the global timing and spark bordeline table by a couple degrees--more if you also switch over to premium fuel...

 

Well the GT doesn't need premium fuel because the compression isn't high enough. Octane reduces flammability so the gas doesnt ignite early or explode in higher compression cars

 

O.K. First, Octane does not reduce flammability. All gasoline has the same flashpoint at which it will fire. Octane rating is the measure of stored energy in the fuel. The higher the octane the more stored energy there is to use.

Cliff's recommendation to use premium had nothing to do with your compression ratio. Premium fuel burns slower so you can use a lot more timing on your motor than you can with economy fuel. (And BTW he knows his stuff, I would take notes when he posts)

 

Alright, well i don't mean to offend anyone on here or go against their better judgement. I guess if you were told something that you didnt know much about and what someone said sounded legible then you would probably believe it too.

 

You'll learn..all in due time.

 

Higher octane fuel in ANY gasoline powered engine, regardless of compression ratio will permit more advanced ignition timing, which will in turn generally produce more power.

Greg Banish's Engine Management: Advanced Tuning would be a good place to start...

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My grandfather always said to "believe none of what you hear, half of what you read, and 98% of what you see..." However that was before the Internet and Photoshop so I suspect the "read" and "see" ratios could use some re-adjustment...

 

An aftermarket intakes on 2v's is pretty much worthless, not all v8. I picked up alot of power from just adding a K&N intake on my car. Also N/A 4v's pick up some good power with adding a intake.