New LS1 Owners - Newbie Tech - I think I have a freak...

I purchased a SLP lid thinking "maybe after I do everything (lid, exhaust, p/p T.b) I might noticed a little something...but not much....boy was I wrong. I put it on and just finished mashing the gas....holy crap. I think I have a freak on my hands. Before, second to first downshifts from a 25mph were a hit or miss on if I would spin the tires, and if I did, who knew how much. Same with second gear chirps. Sometimes they were there, and when present they were no more then a quiet "chirp". NOW, the second to first downshift I nuke the rear tires consistantly, second gear is now a "CHIIRP/spin", with the tires STRUGGLING to keep traction thru the second gear powerband.

Sorry, just wanted to share my excitement. The car was fun to drive before, but now.....yah :hail:

:rock::rock::rock:

Lids have been proven for years to gain 7-13rwhp on average on stock engine applications, so it's not going to be a huge difference by itself, and certainly won't transform a car into a monster version of it's former self. Did you change the air filter at the same time? Maybe the old one was clogged. Maybe some cooler weather is also making the car feel faster and making traction worse.

Lids have been proven for years to gain 7-13rwhp on average on stock engine applications, so it's not going to be a huge difference by itself, and certainly won't transform a car into a monster version of it's former self. Did you change the air filter at the same time? Maybe the old one was clogged. Maybe some cooler weather is also making the car feel faster and making traction worse.

Nope, only difference is the lid. I did plugs/wires at the beginning of the week, as well as an oil change. I didn't feel any difference with those except the car was just smoother. The weather is the same as it always is (gotta love Cali). I've done intakes with all my cars over the years (gen1 Lightning, sn95 cobra, CSVT) and never felt a difference with them. This is a difference, a very noticeable difference.

glad you enjoy it more now :) .. dont break anything

glad you enjoy it more now :) .. dont break anything

Don't jinx me lol. I've only had the car for about 4k miles and have had the transmission done twice (first with 100 miles, 3rd/4th clutches. second time 2k later, defective pump gear)

If you put a stall in it you mite cream your pants then :)

If you put a stall in it you mite cream your pants then :)

I was really considering it when the trans was out, but decided against it. I had a 2800? in my full bolt on gen 1 and didnt really care how it daily drove, that and the hit in gas mileage I took. This car is a daily driver, and that's it.

This is a difference, a very noticeable difference.

It's 7-13rwhp. That is all you can really hope to gain with a lid on a stock engine.

Traction (or lack of traction) is a poor measure of performance gain. You could take the car to the track or put it on a dyno and do runs with the stock lid vs. the aftermarket lid to see the actual gains, which will be about ~10rwhp on average.

I didn't notice any seat of the pants difference at all after putting on a lid, or even after installing headers and a cutout. The lid resulted in a minimal gain at the dragstrip, as expected. The only things that I've ever done to the car that made a noticeable difference in the way it drove were the 3.42 gears and the 2800 stall (both now gone :( ). Glad you're enjoying the car though. :)

consider some suspension upgrades,torque arm,lower control arms,etc...

When I installed headers it made a hell of a difference! Lid was not si much.

There is no way anyone is going to feel an extra 10 hp. Im just sayin :lol:

Now get ready for the new rear end soon. lol jk but be weary

Me, my fiance, a friend, and my dad could all feel a difference when I did the FRA mod (and nothing else to boot). Sometimes you can just feel a difference, no matter what the actual gains.

The more you spin.. The less tread you have. There is your answer.

There is no way anyone is going to feel an extra 10 hp. Im just sayin :lol:

maybe theres a tornado in his lid.

Lids have been proven for years to gain 7-13rwhp on average on stock engine applications, so it's not going to be a huge difference by itself, and certainly won't transform a car into a monster version of it's former self.

Hey uh, question. My car had an MTI lid on it, but I swapped out the entire assembly for the the WS6's stock raised lid/box set up; did I just take a step back performance-wise?

maybe theres a tornado in his lid.

lol. i didnt notice much with a lib but noticed a tone with headers after a tune. and got it retuned after an ls6 intake and felt some more gain. sounds like a tune is the key for me after major mods

Hey uh, question. My car had an MTI lid on it, but I swapped out the entire assembly for the the WS6's stock raised lid/box set up; did I just take a step back performance-wise?

That is definitely a step backward. The only good thing about the WS6 assembly is the larger opening on the lower air box. The WS6 lid is exactly the same as a stock Z28/Formula/Trans Am/SS(non-blackwing) lid in every way except the ram air decal, so using a stock lid will cost you power over the aftermarket lid you had before. But the good news is that you can just simply attach that MTI lid to the WS6 lower air box and get all the gains of the aftermarket lid while still getting the benefits of the larger lower air box opening. :)

That is definitely a step backward. The only good thing about the WS6 assembly is the larger opening on the lower air box. The WS6 lid is exactly the same as a stock Z28/Formula/Trans Am/SS(non-blackwing) lid in every way except the ram air decal, so using a stock lid will cost you power over the aftermarket lid you had before. But the good news is that you can just simply attach that MTI lid to the WS6 lower air box and get all the gains of the aftermarket lid while still getting the benefits of the larger lower air box opening. :)

Jesus H. Christ. I was so intent on perfectly copying the WS6 on my clone that I didn't think about the lids when I swapped the intake boxes. I've been driving the car like this for a couple of years now!!! :bang:Thanks RPM...

lol i see another dead ten bolt in a f-body soon haha

maybe theres a tornado in his lid.


LOL!!! I did that when my car was a V6, and I actually calculated a consistent 1-2mpg increase after it (if the "tornado" that you're talking about is what I'm thinking). Buttt it was probably due to the MAF reading better or better maintenance of it. Now with the V8, I'm just like "Lolz"

to the OP May some unseen dirt on the road, every time and every where you drive? ;) Or it's the placebo effect? Or an angel has touched your car. Whatever it is, enjoy! Just...good luck with the rear :burn:

Jesus H. Christ. I was so intent on perfectly copying the WS6 on my clone that I didn't think about the lids when I swapped the intake boxes. I've been driving the car like this for a couple of years now!!! :bang:Thanks RPM...

LOL!

If you want it to look as correct as possibile while still being able to use the better aftermarket lid, you could get a factory ram air decal and put that on the aftermarket lid. I've seen many people do that over the years, and I always intended to do that with my WS6 but just never got around to it.

The part number for the decal is 12455211, and I just ran that number through GMPD and it appears to still be active. List price is $33.74 but GM Parts Direct sells it for $20.51.

Hope that helps. :)

$20.51 just for a sticker? Now I see why the Honda guys try to justify stickers = power. :funny:

LOL!

If you want it to look as correct as possibile while still being able to use the better aftermarket lid, you could get a factory ram air decal and put that on the aftermarket lid. I've seen many people do that over the years, and I always intended to do that with my WS6 but just never got around to it.

The part number for the decal is 12455211, and I just ran that number through GMPD and it appears to still be active. List price is $33.74 but GM Parts Direct sells it for $20.51.

Hope that helps. :)

Yes that does, thank you! I tried looking the decal up on ebay and elsewhere and it's about $40. Before that however, I need to put my MTI lid back on and go for a test drive! In reference to the OP's post I swear I could feel a difference when I put the stock lid back on, so maybe he HAS experienced something similar...

Edit: Ok so after a day of driving with the MTI lid on instead of the stock WS6 lid I will have to say that I'm pretty sure I felt a difference. I'm not saying that the car is now a 10 second, fire breathing drag strip terror but I'm convinced it made a difference. I also know this is a ricer thing to say but I really like the look of the stock WS6 lid, and I wish the MTI could look as good. Question: why does the stock WS6 lid have two parts: the lid and then the E-shaped assembly behind it, and why don't aftermarket lids like the MTI have this E-shaped assembly?

What you are talking about is called the baffles. I believe baffles make the car quieter but do nothing for performance so all the aftermarket lids don't have them.

Lids have been proven for years to gain 7-13rwhp on average on stock engine applications, so it's not going to be a huge difference by itself, and certainly won't transform a car into a monster version of it's former self. Did you change the air filter at the same time? Maybe the old one was clogged. Maybe some cooler weather is also making the car feel faster and making traction worse.

The exact thing happened to me, I had a stock old paper filter from the previous owner which I bet he never changed. After installing the K&N filter and the lid at the same time , I've seen incredible gains, mostly due to the new filter I think.

Edit: Its also well known that the SLP baffle is an appearance mod.

Edit: Ok so after a day of driving with the MTI lid on instead of the stock WS6 lid I will have to say that I'm pretty sure I felt a difference. I'm not saying that the car is now a 10 second, fire breathing drag strip terror but I'm convinced it made a difference. I also know this is a ricer thing to say but I really like the look of the stock WS6 lid, and I wish the MTI could look as good. Question: why does the stock WS6 lid have two parts: the lid and then the E-shaped assembly behind it, and why don't aftermarket lids like the MTI have this E-shaped assembly?

That "E" shaped thing is an air silencer, designed to reduce intake noise as mentioned above. Removing that silencer is one of the reasons why you gain power with an aftermarket lid. The other reasons are the elimination of the ridges on the underside of the lid, and the round collar that connects to the MAF (rather than the oval-to-round merge of the stock lid). So in summary, adding a silencer to the aftermarket lid would negate much of the potential gains of the aftermarket lid.

As far as appearance, I personally like how the engine bay looks a lot better without the clutter of the silencer, so I have never missed it. But of course this is just an opinion thing....although I guess it does count as weight reduction as well. ;)

Only mod my butt meter felt where headers with tune I seen a recorded diffence with
Milage with the chrs1313 ram air kit went up almost two mpg but I drive all highway.

That "E" shaped thing is an air silencer, designed to reduce intake noise as mentioned above. Removing that silencer is one of the reasons why you gain power with an aftermarket lid. The other reasons are the elimination of the ridges on the underside of the lid, and the round collar that connects to the MAF (rather than the oval-to-round merge of the stock lid). So in summary, adding a silencer to the aftermarket lid would negate much of the potential gains of the aftermarket lid.

As far as appearance, I personally like how the engine bay looks a lot better without the clutter of the silencer, so I have never missed it. But of course this is just an opinion thing....although I guess it does count as weight reduction as well. ;)

Air silencer? Odd. I could understand such a thing on a Malibu Maxx or an Aveo but you would think that people buying an F car would want to hear whatever noises they can. Oh well. What I truly can't believe is that I've been choking my car since I bought the damn thing by replacing the MTI lid with the stock WS6 assembly!!!!!111 Lol, live and learn I guess.

Another question: should I switch back to the standard, shorter T/A lower air box, or keep the taller WS6 lower air box? I can't imagine it makes a lick of difference but it couldn't hurt to ask.
-And to think I almost threw that MTI lid and lower air box in the garbage, too...

Another question: should I switch back to the standard, shorter T/A lower air box, or keep the taller WS6 lower air box? I can't imagine it makes a lick of difference but it couldn't hurt to ask.

Keep the taller one, it's a good thing to have so long as it fits ok with your hood. It looks like you have a WS6 hood already, so this piece is a perfect match. The difference probably isn't anything significant, but it certainly doesn't hurt, and you already have it, and it was meant to work with the WS6 hood.

Good thing you kept the MTI lid though. :)