Important Forum News & Updates

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New Member Introductions

Come on in and introduce yourself to the entire board and tell everyone what you drive!
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Other Car Discussions

Talk about any car manufacturer, or any model you prefer. Anything that's vehicle related goes in this forum, so chat about any car!
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Off-Topic Related

Anything goes here, just nothing about Northstars Or any vehicles. However anything else on your mind you want to let out? Go right ahead!
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General Motor Discussion & News

Curious to know what General Motors is currently scheming for their vehicle lineup, or want to discuss something about the company? Post right here.
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Northstar Engine News

Heres all the latest gossip, and news about the official Northstar Engine Lineup!
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LX5 3.5 V6 FWD

A 3.5 DOHC 24V V6 also known as the 'shortstar' because it is nearly a 4.6 northstar with 2 cylinders cut off, slightly lowered compression ratio and the motor was build from the ground up by itself (not just a 4.6 with the cylinders cut off). This engine was used in the 98+ Oldsmobile Intrigues & The 2001-2003 Oldsmobile Aurora as their base model engine, instead of the l47.
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L47 4.0 V8 FWD

Debuted in 1994 as a motor for the olds aurora, it is a debored northstar V8 making it 4 liters, it is almost identical to the common FWD northstar (and has the LD8's cams rather than the L37's). There are a few minor differences such as a one piece glass filled thermoplastic intake manifold (to decrease weight due to the increased weight of thicker cylinder walls), a higher compression ratio, a simplified a/c rochester fuel injection system, starter interlock system & a new die-cast structural aluminum oil pan incorporated baffling to reduce oil starvation in hard driving. Engine was found in 1994/1995-1999 Oldsmobile Aurora & 2001-2003 Oldsmobile Aurora 4.0.
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Shelby 1 Series 4.0 V8 (Upgraded L47)

A Shelby version of the L47 4.0 was designed, not much is known about this motor other than it has the L37 4.6 more aggressive cams, an increased compression ratio and a redesigned head. These upgrades bring the horsepower output to an outstanding 320 horsepower @ a high revving 6600 RPM. This motor keeps the complete stock bottom end, and some versions have a supercharger cranking out 600 horsepower at over 10 psi on a nearly stock motor RELIABLY! This motor was mainly produced for the Shelby kit car, but many people swap this motor into fiero's and other cars, 1st generation aurora owners also swap this motor as well because of the 70 horsepower output!
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LD8 4.6 V8 FWD

This engine was produced in 1994 and is identical to the L37 northstar except for the fact that the cams are less aggressive in order to create better low-midrange power and a higher torque rating. The horsepower rating is from 270-275 horsepower and contains 295-300 ft lbs of torque. Engine is found in the 1994-2002 Cadillac Eldorado , 1994-2002 Cadillac SLS, 1996+ Cadillac Deville Base & Concours/DTS & 2006-2007 Buick Lucerne CXS & Pontiac Bonneville GXP
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L37 4.6 FWD

The first northstar engine to be produced in 1992 and produces 292-300 horsepower & 285-295 lbs of torque. This is identical to the LD8 engine except has more radical cams. Engine is found in the 1993 Cadillac Allante, 1993-2002 Cadillac Eldorado ETC, 1993-2002 Cadillac STS, 1996+ Cadillac Deville/DTS & 2008+ Buick Lucerne
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LH2 4.6 RWD/AWD

A 2004+ revised northstar 4.6 that has an increased compression ratio, and is in rear wheel drive format which allowed GM too add variable valve timing; which increased the horsepower to 320, and 310-315 lbs of torque. This engine was found in the 2004-2009 Cadillac STS (optional), 2004-2009 Cadillac XLR & 2004-2010 Cadillac SRX
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Buick/Pontiac

Discuss the few vehicles Pontiac & Buick produced that arrived with the Northstar engine!
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Lucerne

Discuss the 2006+ Buick Lucerne, the 2006-2008 came with the LD8 Northstar and put out 275 horsepower @ 6000 RPM, while the 2008-Present Lucerne comes with the L37 which has more aggressive cams than the LD8, it's output is 292 @ 6300 RPM horsepower (which is a 17 horsepower increase, and gets it's peak horsepower at 300 RPM higher).
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Bonneville GXP

Discuss the 2003-2005 Pontiac Bonneville GXP model, the Bonneville GXP came with the 275 HP LD8 Northstar V8 Engine coupled with the 4T80-E with the 3.77 final drive ratio. The GXP Bonneville was the only car to ever have the LD8 motor mated with the 3.77 final drive transmission; as only the L37's were paired with them normally.
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Oldsmobile

Discuss Oldsmobile Northstar related models.
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Aurora

Discuss the 1st Generation Aurora (1994-1999) & the 2nd generation aurora (2001-2003), the aurora was produced with a 4.0 v8 that is nearly identical to that of that LD8 despite it's smaller bore/piston size!
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Intrigue

Talk about the 1998.5-2003 oldsmobile intrigue that came with the 3.5 LX5 V6; also known as the 'shortstar'.
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Cadillac

Cadillac Models that contain northstar engines
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Allante

Discuss the Cadillac Allante.
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XKR Convertible

Discuss all about the Cadillac XKR Convertible BASE.
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2005+ STS

Discuss all about the Cadillac 2005+ STS model.
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STS V-Series

Discuss all about the Cadillac STS V-Series that contains the 4.4 Supercharged northstar with over 500+ horsepower!
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Eldorado

Discuss all about the Cadillac Eldorado model.
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Deville/DTS

Discuss all about the Cadillac Deville/DTS model.
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Seville

Discuss all about the Cadillac Seville model.
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Suspension & Braking

Discuss all about lowering your vehicle, upgrading to performance struts and also cross drilled rotors, stainless steel brake lines & ceramic pads + much more!
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Naturally Aspirated Building

Discuss about modding/tuning your naturally aspirated Northstar engine, discuss things like raising the compression ratio, high performance cams, port/polishing, blueprint/balancing, roller followers etc.
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PCM/Electronic Tuning

Discuss about reprogramming your Northstar PCM/TCM, to increase performance, remove governors, increase rev limiter and also about your transmission controller and changing shiftpoints, shift firmness etc.
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Forced Induction

Discuss all about turbocharging, or supercharging your Northstar, experiments, projects etc.
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Engine Swaps/Hybrids

Talk all about Northstar swaps, other engine swaps and hybrid 2000+ 4.6/4.0 on a 1999- block or vice versa.
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Interior Addons/Mods

Plan on spicing up the inside of your vehicle? Want to reupholster your seats/interior, dye/paint your interior colors, add gauge pods/gauges, adding heated seats, putting on new door sills, adding more woodgrain/metal trim? Discuss it all in here!!
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Outside Body

Looking to deck out the outside of your ride? Here discuss all about body kits, spoilers, aftermarket fenders, mirrors, trim & much more.
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Lighting & Window Tint

Plan on upgrading to HID headlights, modding your tail-lights,adding window tint,installing underglow neon lights, clearing/blacking out your sidemarkers? Anything related and more, make sure to post it right here...
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Audio/Video Install & Help

Need help installing that new touch screen navigation dvd headunit, want satellite radio, trying to hookup an mp3 player to your factory system, can't figure out why your in car tv's arn't working? Get all your help you need here!
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Transmission Problems/Failures

Transmission not shifting right, not going into overdrive, gears slipping between shifts? Discuss it here to get help!
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Engine Problems/Breakdown

Your Northstar engine giving you problems? Won't start, fluid leaking, check engine light on or flashing? Discuss your problems here!
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Transmission Mods

Discuss all about what mods you can do to your transmission, such as LIMITED SLIP DIFFERENTIALS (LSD's), Stall Converters, High Performance CV Shafts, Lightened Flywheels etc.
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Electrical/Wiring Issues

Having electrical issues? Fuses keep blowing, wires shorting out, electrical things not working in the car? Discuss it here to get an answer!
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Annual/Countrywide Meet(s)

This is for the 'annual northstar united meet' which will be chosen at a certain location, and will change every year; we will try to get as many members to come even if it means driving and have the location somewhere in the CENTER/somewhere that is closest to most members. You can also have your own nationwide meet.

Central Regional Meets

This if for meets/get togethers for all northstar united members, and admirers that are located IN or near the states of ND,SD,MN,NE,IA,MO,KS,IL,WI,MI,IN & OH.

Southern Regional Meets

This if for meets/get togethers for all southern northstar united members, and admirers that are located IN or near the states of TX,FL,SC,NC,GA,VA,WV,OK,TN,LA,AR,KY & MS

Western Regional Meets

This if for meets/get togethers for all northstar members, and admirers that are located IN or near the states of CA,OR,WA,NV,ID,MT,AZ,CO,WY & NM.

Eastern Regional Meets

This is for group meetings/get togethers for all northstar members in the east coast (such as MA,NY.CT,RI,DE,NJ,MD,PA,VA etc.

Car Showroom/Gallery

Here you can post all the pictures your heart desires of your vehicle, the more the better; because we all love to view our northstar vehicles!
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Track/Road Racing

Tell us about your racing stories whether it be at the drag strip, autocrossing, on a closed course, or even street racing kills! *NOTE THIS FORUM DOES NOT ENDORSE STREET RACING IN ANY WAY, SHAPE, OR FORM PLEASE DRIVE SAFELY!*
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Wrecks, Bodywork & Painting

Did you just wreck your car, need to do some body work or add some body mods. need help painting or prepping your car? Discuss it right here!
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Automotive Classifieds

Need to sell your vehicle, or perhaps want to post a vehicle for sale you've seen? Go on right ahead. You may also post a vehicle wanted ad, if your looking for a certain make and model. If your looking to sell parts you may do so in the parts classifieds forum!
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Parts Classifieds

Want to sell some Northstar parts, or looking for them? Well post on up in this forum!
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