Its the easiest $100 mod, for sure, but really you're paying $100 for *MAYBE* 5hp. You cant feel that and it doesn't show up at the track. If you're already all H/C with all the other cool stuff, then yes, noticeable difference. Otherwise its mostly a looks mod while your stock.

 

I have a 98TA with mac mids lid and cat back with a good tune and i just went 13.00 108mph.

 

My car, with just a lid and a catback, walks away from all stock LS1 cars, including Vette's, even when speeds get over 100mph.

Say whatever you want, but you will never convince me otherwise. A lid should be the first mod any LS1 owner does.

 

That is not correct. Lids are dyno proven to gain 7-12 rwhp. 10 rwhp is about average. That's a solid .1 in the quarter and is often referred to as the first mod any LS1 should do.

 

Hows that when your running stock times? And I hope you mean Vettes from a stop, that aint gettin them on the roll.

So everyonr gets 10 at the wheels off a lid? Strange, my Formula didnt

Its often the 1st mod done because of the price, and 2, because any *genious* can install one.

 

Just because your didn't doesn't mean others do not. Do a search. 10 rwhp and .1 loss is the track is normal. It's often the first mod because it's 100 bucks for 10 rwhp and you don't even have to be a "Genius" to install it

 

A stock motor is not gonna get 10 at the wheels, maybe 10 at the fly, which is still not going to break down to a whole tenth at the track.

 

It's been done before. 7 rwhp is the least I have heard of and 12 rwhp is the most. Different dynos will give different readings. But if you do a search on lid gains you'll see the most popular answer is 10 rwhp.

 

I think the point is, a lid will become more and more necessary as you get further into modding. On a bone stock engine? Maybe you'll only get ~5 - 10 HP at the flywheel, but once you start bolting on headers, or swapping heads/cam, etc., then the factory lid will hinder the performance. It's a good START because it opens the door for efficient mods down the road .

It's sorta like which should come first, camshaft or headers? Well, I'm sure a cam will boost power, but it will gain leaps and bounds more with LT headers. AND since even a stock engine can benefit from headers, then they're the logical first choice (but again, opening up the exhaust path for even bigger gains when adding a cam ).

 

I have pulled steadily on every stock C5 I have ever raced, in any gear, from any speed, from a roll or from a stop. I have not gone above 130mph in a race, but on three separate occasions with three different C5s, I was still pulling away at that point when I let off. Every C5 I have raced has been an LS1 coupe (i.e. no convertibles, no FRCs, and no Z06's).

My wife's uncle has a 2004 C5 M6 with a Vari-Ram intake and a Corsa exhaust. He and I are dead even to 100mph; we haven't gone faster.

I'm running stock times because my 60' times suck. With a 2.0 60', I'm almost positive my car has a 12.99 in it.

 

Here is a test of various airlids done to a nearly stock car. After going to the link click on "here" to see the article by GM high tech performance magazine.

http://www.motorsporttech.com/fbody_air_intake01.asp

Here are the cliff notes:

Stock airlid did 319.9 RWHP
G2 airlid did 325.4 RWHP (they said it was loose fitting and scuffed)
MTI airlid did 326.2 RWHP (they said it was loose fitting and rough patches)
QMP airlid did 330.2 RWHP
SLP airlid did 331.1 RWHP
TSP airlid did 331.5 RWHP
Whisper airlid did 330.7 RWHP

Track results varied with slight 60' differences but the stock lid run was 13.1 @ 108.7 where the other airlids ran 12.9-13.0 @ 109-110.

Airlids work. They are worth the money. If you get a good quality and fit you CAN see 10 rwhp from a stock or catback only car.

 

But your looking at a car that they have tuned. They fixed the A/F ratio, that doesnt reflect an off the showroom floor Camaro. Of course a tuned car stands to make better gains with it, but we are arguing a stock car, correct?

 

Incorrect. When you put any car on the dyno you give it a dyno tune (may as well since it's there). But that isn't going to affect the fact that the lids (ones that fit well) gain 7-10 rwhp.

It's dyno proven.

 

No, there is a difference between dyno tuning a car, and just plain dynoing it. Im not talking about a tuned car with all sorts of wonderful things done to the computer.

Ya you might as well tune it since its there. But dont forget the hundreds of dollars in price difference.

 

I understand that. But a/f on a stock vehicle leaves little to improve on. I doubt they (or anyone) will do alot of tuning to a car with just a catback. The 10 rwhp is legit in my book and nothing you can say will change that.