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I got an 03 deville been having it for 2 years now and I love it I just want it to be faster and I'm just wondering what I can to do to make it faster I honestly have no idea were to start this is My second cadillac any suggestions
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,825 Posts
I got an 03 deville been having it for 2 years now and I love it I just want it to be faster and I'm just wondering what I can to do to make it faster I honestly have no idea were to start this is My second cadillac any suggestions
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the ONLY way to make your Deville go faster -
is to push the gas pedal down further -

if you are thinking about trying to make it QUICKER -
don't bother - there is absolutely NOTHING available -
nada - zero - zilch - zip -
there is just no way to squeeze a single extra pony out of it -
or gain one single MPG -

Cadillac thought of EVERYTHING - and built it ALL in -

enjoy your Cadillac for what it IS -
but don't blame it for what it isn't -
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
:welcome:

Nothing.

There is NO aftermarket support for your car.

Short of spending $16,000 for a custom turbo setup (it's been done to ONE Seville), you have what you have.

Corsa did make a cat back exhaust for your car, but it's discontinued. Their Seville system got me 16 WHP, which is pretty insignificant (I only did it for the sound). A well made, mandrel bent, custom system could get you the same results.

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3 replies in 3 minutes. I think that's a record this month, lol.
 
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:welcome:

Nothing.

There is NO aftermarket support for your car.

Short of spending $16,000 for a custom turbo setup (it's been done to ONE Seville), you have what you have.

Corsa did make a cat back exhaust for your car, but it's discontinued. Their Seville system got me 16 WHP, which is pretty insignificant (I only did it for the sound). A well made, mandrel bent, custom system could get you the same results.

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3 replies in 3 minutes. I think that's a record this month, lol.
Haha
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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87,173 Posts
:welcome:

Faster? It tops out at 112. How much faster do you need to go?
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,825 Posts
There's always nitrous.

That'll get you to the repair shop faster than anything I know.
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There's always nitrous -
ya - ONCE - - - - - - BOOM!
 

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98 DeVille, 97 DeVille d'Elegance
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7,345 Posts
I put a nitrous kit on engine i knew couldnt handle it and put big jets in, think 250 hp.... I think i have some of th e pieces from the engine laying around.
I still have the kit... Hmmm I'm getting another deville with bad HG soon... I'd be fun for a few minutes.
 

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'02 ETC ECS#533, '05 Escalade, '05 AWD Magnum, '74 455 OLDS
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1,948 Posts
I found something interesting, but it changes when I post it.
Try: cadillacowners.com/tech/STS/NitrousInstall/
Replace cadillacowners with lincoln cadillac with vs between them.

Some people will try anything.

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There's always nitrous -
ya - ONCE - - - - - - BOOM!
Maybe twice.
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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69,778 Posts
The sticker from some aftermarket air filter boxes is worth 4.3 HP at idle. (Right rear quarter window only.)
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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No. The disclaimer states that as stickers are added the cumulative HP gain drops by a factor of 0.65. (Added weight)
 

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Vendor
2001 SLS, 2004 GMC 2500 DMax, 86 C10
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405 Posts
I put a nitrous kit on engine i knew couldnt handle it and put big jets in, think 250 hp.... I think i have some of th e pieces from the engine laying around.
I still have the kit... Hmmm I'm getting another deville with bad HG soon... I'd be fun for a few minutes.
you better record that! if you do haha
 

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'02 ETC ECS#533, '05 Escalade, '05 AWD Magnum, '74 455 OLDS
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1,948 Posts
I put a nitrous kit on engine i knew couldnt handle it and put big jets in, think 250 hp.... I think i have some of th e pieces from the engine laying around.
I still have the kit... Hmmm I'm getting another deville with bad HG soon... I'd be fun for a few minutes.
A 250 shot on a N*?!
That page I found only said to use a 25 or 50 shot.
 

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98 DeVille, 97 DeVille d'Elegance
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7,345 Posts
Oh if i do it it's getting the big jets and i don't plan on it lasting more than a bit. Might even spring for racing gas while I'm at it... I found the bottle last night, now for the rest.
 

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'02 ETC ECS#533, '05 Escalade, '05 AWD Magnum, '74 455 OLDS
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1,948 Posts
The most I ever tried in my Olds is a 150 shot. It takes a full second off at the track.
Racing gas never gave me any gain. Save your money. It only helps with 12:1 or higher. But it does smell good.
 
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