a friend of mine has a JLT intake that another buddy of mine wants. he would like to know if it is 100% necessary to have it tuned if all he has is the JLT on his '07 GT. i am curious as well i suppose. i have read everywhere on sites that SELL them that you do but i was wondering if anyone had any first hand experience? thanks

 

You 100% NEED a tune or it won't run right at all

 

In order to get the most out of a CAI a tune would be helpful

 

Your car won't run right at all with a tune required CAI, you need a tune that's it!

 

Fair enough, I don't know too much about 07 CAI, didn't know if JLT required tune or not.

I ran my 11 GT with a Steeda CAI with no tune for a few days and it ran just fine, threw a lean code though

 

If it throws a code like that doesn't it, go into some kind of safe mode where it has an extra rich air/fuel ratio

 

It's very simple: an after-market intake pulls more air into the engine. If you have more air but are pulling the same amount of fuel in, you run lean. The tune will adjust the fuel intake to match the greater air intake, resulting in -- wait for it -- more horsepower! Oh my gosh! So yeah, a tune is needed.

 

Possibly, but I didn't notice any difference at all in drivability

 

Can you really feel a 10-15 hp loss tho?

 

Well your earlier post said it wouldn't run right at all... Which isnt the least bit true

 

Well he is technically right. The engine threw a code because it was running lean. Running lean can damage the pistons. Seizing up the engine would be considered not running right at all!

 

I understand that all I'm saying is that technically it was still running fine

 

Well yes it will still run but if it's running and throwing codes and in a closed looped safety mode, I wouldn't consider that fine, I'd say it still "Runs" haha

 

i was just wondering how it would run and what not. ill just tell him that YES he does need a tune very soon. i mean he drives it about once a week. i knew it would be necessary in the future for sure. thanks!