: General Northstar info needed



randman1
08-13-05, 01:30 AM
Hello, all. I'm looking for some general Northstar info:

In what year did the Northstar motor first appear.
In what models can the Northstar motor motor be found from begining to say about 99
Is one year/version better for aftermarket modifications, durability or longevity.

I'd also like to see a diagram of subframe dimensions from someone that has a Factory Service Manual. This information will be used to determine if a motor swap is feasible.

Thanks.

Eldyfig
08-13-05, 01:46 AM
Welcome to the forum.

The north*s started in 93. I believe I have seen on this forum that the 96 is the best year according to opinions.

MWA
08-13-05, 09:14 AM
Try this site and five-page article. I enjoyed it when another person on the forum recommended it: http://www.babcox.com/editorial/us/us100232.htm
Its one of the best for history w/visual drawings of the N* itself.

Ranger
08-13-05, 11:53 AM
The Northstar was standard in all models after '96. There were changes in the 2000 model year to add roller followers and lower compression. I forget what year it was that COP (coil on plug) was added. '01 or '02 maybe. If you are replacing a '99, I believe you'd be better sticking with a '96-'99 due to PCM differences.

randman1
08-13-05, 11:56 AM
Thanks for the welcome. That link is gives a lot of great information... exactly what I needed. I forgot to ask for VIN codes but the article has all of the info.

Still would like to see the subframe info. Any GM techs ot DIY'ers here have access to Mitchell On Demand or similar service?

Actually, I intend on installing it into a Bonneville. Now before everyone starts laughing their heads off, I'll do some explaning.

http://i20.photobucket.com/albums/b246/billboost37/P1010175.jpg

http://i20.photobucket.com/albums/b246/billboost37/P1010180.jpg

Short vid:
http://www.putfile.com/media.php?n=MOV01785

I need to take some better pics but these will give you the general idea. I'm in the finishing stages of a motor swap project. This is a 97 Series II L67 in my 90 Bonneville. It was a nice car but a little boring in the HP department. The 97 drivetrain supports many aftermarket performance parts so it will be a good platform.

The L67 is a great motor but nothing beats a V8. This is why I'm doing the research. I have an 89 parts car that has a very straight and solid body and a 93 which is a daily driver. I'd like one of these to be the lucky receipient.

Mark Bunds
08-13-05, 12:35 PM
Short vid:
I need to take some better pics but these will give you the general idea. I'm in the finishing stages of a motor swap project. This is a 97 Series II L67 in my 90 Bonneville. It was a nice car but a little boring in the HP department. The 97 drivetrain supports many aftermarket performance parts so it will be a good platform.



It sure doesn't sound boring...

randman1
08-13-05, 12:50 PM
Hahaha. Yea, that was after the swap but before the exhaust shop. It only had the downpipe and factory cat section installed.

http://i18.photobucket.com/albums/b115/frankenbonne/DSC01816.jpg

The sound resonated through the sheetmetal as well as my internal organs. It now has a Magnaflow high flow cat, 2 1/2" pipe and a Magnaflow muffler. Much more docile now but is in dire need of a resonator. Sounds a little ricey.

I think I worded the above post incorrectly. Before the swap it was a little boring. Afterwards, it was much more lively as depicted in the vid. :2thumbs:

eldorado1
08-13-05, 09:32 PM
It was a nice car but a little boring in the HP department. The 97 drivetrain supports many aftermarket performance parts so it will be a good platform.


Aftermarket parts can put you into 450+hp ranges reasonably easily on the L67...

The northstar's aftermarket is limited to one company, with expensive parts. That being said, you can get 375hp N/A out of these motors with just a cam swap. The 96-99 300hp "Vin 9" engines are the most desired, with preferance to the latest year available. The 2000+ engines have coil on plug setups that requires a very costly aftermarket computer. The 93-94 engines are probably preferable if you want to go boost. Or at least their intake is...

I fit the drivetrain (complete with the stock massive auto) onto the equivalent of a chevette subframe... just to give you an idea of size. If you've seen the 3.4DOHC engines, it's the same width, just with a couple extra cylinders.