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95 Seville Intake???


sevilleriden95

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Welcome aboard. You are member 5000! Wow. Very little can be done with these engines, the engines are already putting out 1 to 1+ HP per 279 cubic inches. A Northstar Powertrain engineer used to frequent this board and he once said, "all of the low hanging fruit has been picked".

That said, you might look at Marks car page see then link on his profile to see what he did. I would have to say that Mark is the man and his mods are about as extreme are you can get. I think he got 5OO HP at the wheels... The obvious question of course is, once you get 500 HP at the wheels how driveable is the car on a daily basis, think rain and snow...

http://caddyinfo.ipbhost.com/index.php?showuser=158

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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darn thats pretty ridiculous. I wish I had the time and money to put all those mods on my car. But stinks that my engine is drained of its potential. Any suggestions on the type of exhaust I should put onto it? I dont want it to be to loud, but I want it to purr idel and roar with the pedal down.

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The problem with the exhaust is the front crossover pipe, its the biggest restriction in the engine. If you run a pipe under the carriage it is visible and the ground clearance is compromised. The tranverse nature of the engine causes problems for exhaust mods. I circled the front crossover pipe in the attached pic.

I would love to see someone with header or muffler system fabrication experience try to solve this issue. Do a search of Mark's threads and you will see that he was unable to come up with a good solution as routing the pipe became the problem.

post-2998-1165513827.gif

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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For exhaust mods, I recommend Borla ProXS series mufflers. Your requirement for "purr idle and roar with the pedal down" is exactly what you will get with these. Others have used the Borla general replacement. There is at least one other supplier of stainless steel aftermarket turbo mufflers for Cadillacs that has been mentioned on this borad.

After you get the Borlas, you can listen for a rasp or hiss at high RPM. If you hear it, you can get a low-restrction catalytic converter for it too. Watch out for CA restrictions, though because not all low-restriction catalytic converters are legal in California. Watch for OBD II certification if you live in CA or have a CA car (like I do).

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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But stinks that my engine is drained of its potential.

Look at it this way, the factory already did it for you. 1 HP per C.I.D. is not to shabby. Our old Guru also used to say that "Nothing was left on the table" when they designed the Northstar.

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darn thats pretty ridiculous. I wish I had the time and money to put all those mods on my car. But stinks that my engine is drained of its potential.

It's not "drained of its potential". We just showed you a car with 500+ hp. :)

It's drained of "cheap" potential, yes. This powertrain was thoroughly developed at the factory with both performance and reliability at the forefront. That fact is usually demonstrated through excellent service over hundreds of thousands of miles. What you might lose in "bolt-on-ability" you certainly gain in class, style, and durability.

Enjoy your Cadillac for what it is, and ride in style. :)

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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Good point Jason, maybe I wasn't clear enough. The low hanging fruit is easy to get to, the fruit at the top of the tree is very hard and risky to get to, translation, it requires lots of cash to net any real gains.

The problem as Mark might have mentioned in his posts, is that the PCM controls not only the engine but it controls EVERYTHING in the car. Since the PCM is not hackable or 'tuneable' many issues arise that are not easy to remedy.

See this company to see what you can do with these engines if you use an aftermarket PCM and performance parts (keep in mind that if you did this in your caddy, NOTHING would work other than the engine)...

http://www.chrfab.com/

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Well I was doing some searching on the internet and found an intake for the baby. Do you think its worth the money? Or just buy a filter? And trust me I'm exstatic that I have this new ride and definitely riding in style :D And changing the radio face wouldnt be a hassel right? What Cadillac doesn't have a CD player, other then MINE.

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Do you have an SLS or STS?

I have an '95 STS and I had some Magnaflow Stainless Steel Straight through mufflers installed.Almost stock in size,except upgraded to 2 and a half inch in/outlets to the tips.Sounds great.Does not bother my wife.We could hear the radio,and spank stick Mustang GT's from stop light to stop light with ease.They work great with the sound of the Northstar.

I also have a K&N filter, and thinking about getting an intake.If you do get one let me know how you like it.

I could rev to 6500 R.p.m's in each gear consistently with the filter/exhaust.

I currently have 185000 original miles and love my Caddy.

Hope you enjoy yours too!

Florin

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with the cold air intake and filter i run it sets off the service emissions system, for the mass airflow sensor, i do notice a differnce in power when its on, but the car seems to chug a little more while idleing. And in my 96 sts i needed a module to change the radio, but i believe thats only needed if u have a bose system

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Our Moderator did some tests with air intakes on his STS and posted the results on Caddyinfo (not on the forums). The page:

http://www.caddyinfo.com/airfilterstudy2.htm

A Caddyinfo page on user's experiences (a bit dated):

http://www.caddyinfo.com/stsmuffler.htm

Here's a more expensive setup that may include support for the intake air sensor and cooling of the PCM, and use of the stock cool-air intake (no instrument data but good photos):

http://www.caddyinfo.com/cars/dougcustomintake.htm

This page has links to a lot of performance tests using an AP-22 data recording meter for hp vs time:

http://www.caddyinfo.com/ap22review.htm

The general consesus in the instrumented data tests is that the best overall air filter is the stock Delco air filter element in your existing air box. One thing that I haven't seen but would likely have some effect for throttle response would be insulating the air intake hose and air box. You might also improve the insulation blanket under the "beauty cover." The underhood temperatures in the Northstar are very high and better insulation will decrease warming of the air into the fuel injection. Be sure and use non-flammable insulating materials.

For exhaust, I recommend one of the stainless steel turbo mufflers (Magnaflow is mentioned here and Borla is a common option, even offered by some Cadillac dealers; I use the Borla ProXS series -- "super turbo" mufflers -- myself. I think the stock catalytic converter is OK, but I don't have any numbers to prove it. You can decide for yourself after you get the turbo mufflers, by listening for a rasp or hiss at high RPM.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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I tried a K&N cone filter and didn't like it. I'm using a real (AC paper) filter ever since. I had the K&N cone for all of 2 weeks, it was that bad.

http://www.jnjhome.net/cadillac/filter.htm

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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Well that was definitely imforming. I think I'm going to put a straigh pipe from the Cata to the mufflers and put in magna flows mufflers. And Im guessing I will just go with a paper filter. If there's any other suggestions concerning engine mods or interior/exterior mods let me know. All my friends have these little bmw's all mod'd up and I want to make sure they know that the American whips are the best looking and still will whip up on there little rides.

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That would open her up. The best think you could do is to, tune her up, change the fluids, filters and use 93 when you want the best performance...

You can improve the braking with drilled rotors.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Question pertaining to the speakers. Sometimes when I'm listening to the radio will be switching through the channels ect... and the speakers to scratchy or they are experiencing static? The attenna is coming up fine? Is there a possibility the speakers are old and not working well? Or the connection between the attenna and radio is somehow getting deminished?

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