Air intake upgrade - DTS Performance ?
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Northstar Engines and System Technical Discussion Discussion, Air intake upgrade - DTS Performance ? in Cadillac Engine Technical Discussion; Does anyone make a air intake box upgrade for a northstar engine in a DTS?...
  1. #1
    BlueAngel#07's Avatar
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    Air intake upgrade - DTS Performance ?

    Does anyone make a air intake box upgrade for a northstar engine in a DTS?

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    Re: Air intake

    Probably not, and why ??? The existing CAI installation and pleated filter flows more air than the engine can handle at WOT as-is.

    Not as much bling, and cheaper to maintain ................. (NO, a K&N will do exactly nothing except lighten your wallet.)

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    Quote Originally Posted by Submariner409
    Probably not, and why ??? The existing CAI installation and pleated filter flows more air than the engine can handle at WOT as-is. Not as much bling, and cheaper to maintain ................. (NO, a K&N will do exactly nothing except lighten your wallet.)
    I guess I should know by now. Lol. Thx
    I want the other 8 horsepower!

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    Re: Air intake upgrade - DTS Performance ?

    So do I !!!! ............ hope springs eternal. I have done a slew of air duct/airbox work and the only thing I have done is to increase intake noise during WOT work. Sounds most blingy ricer, but no power to be had. Messed with a JET mechanically modified MAF - set mixture codes and threw away good money.......... tested it over a 1650 mile round trip to Florida and back a few years ago - did nothing except set codes and a mid-throttle bog. It's still on the shop shelf.

    (A K&N sticker is good for 1.76 hp at idle.)

    Horsepower - does CORSA make a cat-back for the new "DTS" ? On a 2000 - 2003 STS (VIN 9 Northstar) it's good for 16 hp at redline. (Hmmm............ Doesn't look like they do.)

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    Re: Air intake upgrade - DTS Performance ?

    If your wallet can stand it check these folks out?

    http://www.hennesseyperformance.com/

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    Re: Air intake upgrade - DTS Performance ?

    Sub can we start a sticky posting there are no Performance upgrades for the northstars, they are tapped out for power, any vehicle that has OBD-2 has been designed for optimal performance for the most part. the only time a intake or exhaust upgrade will do anything for power is on lets say a early 80's 350 small block because from factory they were so limited with the restrictive exhaust and little 2 barrel carbs.
    Replacing the Head Gaskets on a Northstar? Use our SureGrip Cylinder Head Stud Kit!


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    Quote Originally Posted by Speedygman
    If your wallet can stand it check these folks out?

    http://www.hennesseyperformance.com/
    A Hennessey FWD Cadillac sedan would be equal parts awesome and hilarious!

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    Re: Air intake upgrade - DTS Performance ?

    These ought to be good for 10-20 HP at least.









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    Re: Air intake upgrade - DTS Performance ?

    ams and royal, must be a super performance engine if you have 2 synthetics.
    Replacing the Head Gaskets on a Northstar? Use our SureGrip Cylinder Head Stud Kit!


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    Re: Air intake upgrade - DTS Performance ?

    Quote Originally Posted by 04GrandAmGT View Post
    Sub can we start a sticky posting there are no Performance upgrades for the northstars, they are tapped out for power, any vehicle that has OBD-2 has been designed for optimal performance for the most part. the only time a intake or exhaust upgrade will do anything for power is on lets say a early 80's 350 small block because from factory they were so limited with the restrictive exhaust and little 2 barrel carbs.
    Not quite - find the very recent thread titled "Vroom Vroom", in which there's a before and after dyno run of a 2001 STS fitted with a CORSA cat-back. Plus 16 hp and 6 lb/ft up around 5500 rpm, WOT.......... that's exactly the same result as the now-discontinued CORSA advertising dyno run of a similar car.

    Here, Evrett - go back through the thread - Post #48 - http://www.cadillacforums.com/forums...orsa-dyno.html

    I run a CORSA also and I can verify that the power change is real - and verifiable. The crossunder Y-pipe excess flash removal is worth another 2 hp. ........... and, as with all power gains, it all happens way up in the power band - no effect whatsoever at road loads and everyday driving speeds. It happens only at YeeeeeeHaaaaaaa !!!!!!
    04GrandAmGT likes this.

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    :yeaj:

    Corsa advertised 16-20. The difference between my highest before, and highest after result, was 16 HP. The difference between my lowest before, and highest after result, was 20.

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    Re: Air intake upgrade - DTS Performance ?

    Quote Originally Posted by Submariner409 View Post
    - no effect whatsoever at road loads and everyday driving speeds. It happens only at YeeeeeeHaaaaaaa !!!!!!
    LOL, but is it really worth paying $1000+ for 16hp ... and its only available for the sts, i know its a beautiful exhaust and they sound amazing, but to the average guy they dont want to spend that much money and only get 16hp
    Replacing the Head Gaskets on a Northstar? Use our SureGrip Cylinder Head Stud Kit!


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    Re: Air intake upgrade - DTS Performance ?

    "only" 16 horsepower is significant when the FWD power hovers around 200 whp.

    $1200 or so - let's look at a Chevy 327 ............. what does a good Edelbrock dual plane, tricked out Holley, fuel system, and tuning cost ? for how many hp ?? Cam/lifters/springs/valves - and an engine teardown ??? Big bucks.

    Why do "modern" tuners sniff at less than 100 hp gains ??? Hell - back in '65 a 20 hp increase was earth-shattering........ and the little figures eventually begin to add up to big numbers.

    As you posted, the OBD-II controlled cars are a bitch to tune for gains - so for someone to be able to slap on an exhaust system - cat-back at that - and realize 16+ hp is a big deal. Cost ???? How many Seville drivers do you see lined up for a CORSA ? ......... demand is so low that they quit the Deville series, and Seville is next. On the other hand, do you foresee Weiand and Edlebrock dropping SBC dual planes any time soon ?

    Remember guys - we're talking about gains way up in the rpm/power curve, where your engine operates <1% of the time.......none of this makes a bit of difference at idle or cruising to Florida at 85 on 95. At WOT the engine and emissions controls disappear (open loop) and you can do some good stuff; on the other hand, during normal driving, the engine is emissions controlled - tightly.

    See that left hand SAE power sequence ??? That's wheel horsepower. 16 of those is a big deal. The engine power is one thing - power on the pavement is entirely different - the generally accepted Northstar FWD powertrain loss figure is somewhere around 25%, so that whp figure equates to a ~26 hp gain at the flexplate.

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    Re: Air intake upgrade - DTS Performance ?

    Yes but look at the technology we have available, some 4 cyl are pushing 300 Brake HP, ps a full holley top end kit, includes cam, heads, push rods... ETC, go for about $2000, and you go from 250hp to 400 without even trying that hard. now thats an engine from pre 1987 simple pushrod engine, look at a northstar, yeah doesnt quite have the Cu In but with DOHC, and alllll the other technology advancements you would think they would be able to put out a little more that 300 Brake HP

    ----------

    Look at fords Boss 5.0 , Quite similar to a northstar at least the basics, and they are pushing 444hp, yeah it 0.4L bigger engine. but 144HP difference for a handfull of cubic inches, the northstar has potential it has just never been used to its full extent.
    Replacing the Head Gaskets on a Northstar? Use our SureGrip Cylinder Head Stud Kit!


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    Re: Air intake upgrade - DTS Performance ?

    Quote Originally Posted by Submariner409 View Post

    Why do "modern" tuners sniff at less than 100 hp gains ??? Hell - back in '65 a 20 hp increase was earth-shattering........ and the little figures eventually begin to add up to big numbers.
    Because this isn't '65 and this is the age of efficient and cheap forced induction and overbuilt factory engines - easy triple digit gains, never seeing so much as a valve spring. 16hp is good, but 16hp for $1000 isn't anything to get excited about anymore

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