2001 SLS vs STS

[lleroyb]

Hi, newby here. I have a good friend who has a 2001 SLS and he is wondering what it would take to get to the 300HP of the STS.

Thanks for any advice,

Lou

[N0DIH]

Swap in cams from a 300 hp version, but you lose bottom end power some. The N* Engine forum guys would be able to help more.

You probably will need in the PCM tune from the 300 hp, but it will mess up your speedo.

[justindre]

hi guys two questions how do you ask questions on this forum and also how do you adjust the value of the sensors when in the self diagnostic mode of lets say the tcc iac and stuff like that

[Highline Cady]

Personally I'd leave the cams, they are better in my opinion anyway, and only the intake cams are different from 00-03. Swap the 3.11's for the 3.71's and get an AJ tune. Those will give you the best results, and with the better low end of the deville/SLS/Eldorado cams you'd be faster, although just slightly, than your STS brother, trust me.

[CadillacSTS2003]

doing some post diggint Highline lol
as for the 3.71s with the 275 being faster i still dont trust this
the Bonni GXP came with this set up, weighs nearly 400 pounds less and it still clocks in slighly slower than a 2000+ STS with 3.71 and the 300 hp

[N0DIH]

I guess it would matter how much time you could spend in the upper rpms where the power is stronger.... But for daily driving, a 275/3.71 car would be a nice daily driver.

[Highline Cady]

Ya it's been a while STS2003, so I have been looking around, chiming in where I can, because anything I recommend I have done. I haven't been in a ton of races with DTS's but the ones that I have raced I have beat. I jump them right out of the whole by a car length and they never close the distance. But I also have a different PCM from stock, much closer to a STS/DTS program than the stock deville/DHS/SLS programs.

My opinion is, the "275 horse" cams get me out of the whole quicker, and the tune keeps them from gaining on the top end. Anybody that lives in the Milwaukee area that has a 00-03 DTS, feel free to pm me if you want to run, for shits and giggles, loser buys the beer, afterwards. Anyway, you'd be impressed what this "275 horse" N* will do, like I said earlier the only difference is the intake cams in these particular years, earlier models there was a much bigger difference, performance wise, in my opinion.

[N0DIH]

I wouldn't mind if I get up there sometime just to see how a heavy LT1 Fleetwood does. I just don't get up to MKE that often anymore.... Just for fun!

I ran a 03-04 Silverado SS a few weeks ago and to 105 I was up front, and he ~should~ have had the advantage....

[Highline Cady]

Oh, I believe you, some of you Fleetwood guys are sneaky fast, ya gotta love all those after market Corvette parts!!! But if you ever are this way, it'd be something to do for fun.

[nmcgrawj]

So highline u have a 03 DHS with upgraded 3.71's and a AJ tune?

What would happen if those DTS/STS/300hp cars got the tune?

Im new to the caddy world and im thinking about getting one. Trying to research and learn what options there are out there and which model i should get between a seville/deville/sts/dts.