The results are in........ Northstar dyno

crzyone · Post by **crzyone** » Thu Feb 02, 2006 1:14 am

aaron wrote:Wow those N*'s sure aren't pretty in stock form.

I think mine looks ok. No coil packs or spark plug wires to clutter it up.

This is how it looks now, don't mind the wires, I'm currently wiring the motor.

crzyone · Post by **crzyone** » Thu Feb 02, 2006 1:17 am

Series8217 wrote:Very cool, Ryan! Congrats!

How about some pics of your exhaust?

This is how I routed my exhaust. I cut out my trunk so I had quite a bit of room to work with. 2 full size mufflers.

I'll stop hijacking the thread now....

whipped · Post by **whipped** » Thu Feb 02, 2006 10:20 am

You guys wanna see something crazy?

Here's a graph comparing the HP estimated by engine analyzer pro (run through a 23% tranny loss), and my actual dyno'd HP.

Besides the error at 6500, I'd have to say that's pretty good!

TurboGT · Post by **TurboGT** » Thu Feb 02, 2006 12:44 pm

That is fucking awsome. With it being so close you could play with different cams, cam timing, ect. and see what you can get out of her. Good to see it running well :thumbleft:

Do you have to have adjustable cam gears to play with your timing?

whipped · Post by **whipped** » Thu Feb 02, 2006 5:03 pm

I have been playing with it a bit. Interestingly enough, 11.5" runners with 266 exhausts (swap intake cams into exhaust slots), will net 350-370hp, depending on whether that 20hp "error" is still there.

Swap in 288 intake cams, with everything above, and 368-388hp, again depending on whether the error is there. Swapping all the cams to 288's doesn't seem to do much at all. Which is interesting, but I can get 2 288 cams from chr for $250, + springs, $150, and I'm golden for 7500pm revlimit and "about" 380hp at 6500.

But then again, $400 is 1/2 way to a vortech and 470hp... hehehe.

Either way, I need to start pulling in some money, because I'm going to need to upgrade the radiator, and I'd like to put 11.25" brakes on the rear, and get some wider tires all around. I've been in 2 accidents in the past month, one when I pulled into a left hand turn lane that ended 100' sooner than it should have, and another when I was coming home from the dyno, and rear ended a bitch who slammed on her brakes when the light turned yellow. No damage either time, but I'd like to minimize my braking distance.

The Dark Side of Will · Thu Feb 02, 2006 9:17 pm

There is limited virtue in being able to stop faster than the guy behind you.

Series8217 · Post by **Series8217** » Thu Feb 02, 2006 9:20 pm

The Dark Side of Will wrote:There is limited virtue in being able to stop faster than the guy behind you.

At least you're never at fault when they do the rear ending..

whipped · Post by **whipped** » Thu Feb 02, 2006 9:48 pm

Series8217 wrote:
The Dark Side of Will wrote:There is limited virtue in being able to stop faster than the guy behind you.
At least you're never at fault when they do the rear ending..

exactly. If the bitch who slammed on her brakes reports the accident, Im pretty much at fault no matter what. They'll just put it on the report that I was driving too close. Instant rate increase.

Sinister Fiero · Post by **Sinister Fiero** » Fri Feb 03, 2006 1:28 am

Nice job on the HP improvements! Glad to see someone making tuning progress with this engine.

As far as the mandrel bends go, I believe either summit or jegs sells STAINLESS 3.5" and 4.0" mandrel J or U bends. Not cheap tho.

rockcrawl · Post by **rockcrawl** » Fri Feb 03, 2006 8:10 pm

He said given the freedom to do whatever, he would extrude hone the exhaust manifolds. I believe he said the exhaust crossover was decent enough stock, but obviously there's some reason he'd hone the manifolds over any other mods...

I don't think he was talking about a Northstar. You can't extrude hone the manifolds, they are made from stamped and welded sheet metal. The crossover gets very tight under the oil pan and where it passes between the engine and trans.

whipped · Post by **whipped** » Fri Feb 03, 2006 10:53 pm

rockcrawl wrote:
He said given the freedom to do whatever, he would extrude hone the exhaust manifolds. I believe he said the exhaust crossover was decent enough stock, but obviously there's some reason he'd hone the manifolds over any other mods...
I don't think he was talking about a Northstar. You can't extrude hone the manifolds, they are made from stamped and welded sheet metal. The crossover gets very tight under the oil pan and where it passes between the engine and trans.

I think he meant the flanges... I've never inspected it to see if there's a difference in size between that and the gaskets or the flange and the inside of the "tubing".

THE PUNISHER · Post by **THE PUNISHER** » Wed Feb 22, 2006 4:55 pm

My northstar manifold. Gm's kick ass welding is still alive and well. Used a carbide bit , then a polishing bit to smooth it all out.

It added 75hp ..I could feel it.

Im sure it helped somewhat , they were pretty shitty lookin.

sorry to dig this up from the past..I have been away for a bit.

whipped · Post by **whipped** » Wed Feb 22, 2006 5:12 pm

I knew I wasn't crazy!

THE PUNISHER · Post by **THE PUNISHER** » Thu Feb 23, 2006 11:56 am

william Capelle's Northstar Dyno

249/271

5spd car , not sure what ECM was used...Flywheel , ect..

I know DS-Will can shed some light on this.

The Dark Side of Will · Thu Feb 23, 2006 12:28 pm

Stock ECM, same chip I'm running. I got my chip from him. He's running a 275 engine.

He's got a QM clutch so he's got a few whp from that.