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Ottawa Fiero Club Forum  |  General  |  Project Work Logs  |  Topic: Thinking Northstar Conversion? « previous next »
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Author Topic: Thinking Northstar Conversion?  (Read 64492 times)
hellfish87gt
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« Reply #120 on: April 14, 2004, 11:48:40 am »

so aaron what is left to do on your car? it seems almost done. or has it been ready to drive, just you want it 100% done when you acually pull it out.
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aaron88
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« Reply #121 on: April 14, 2004, 12:23:45 pm »

Itís driveable now, but Iím still tuning the computer.  Unfortunately that involves a lot of driving and hard acceleration.  Itís on the road now but wonít be officially on the road until sometime next week.

Also I still have to put in the front shocks and springs.

Aaron

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Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
hellfish87gt
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« Reply #122 on: April 16, 2004, 03:12:33 pm »

ya tuning is goign to take alot of time. i have mine running but it wont idle, but i'm assuming that it is because there was no way to predict how it would run at 0 degreess, on CHRfabs part. that and the IAC is beina bitch
i'm also tryign not to piss the neighbors off to much Cheesy
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aaron88
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« Reply #123 on: April 16, 2004, 04:43:30 pm »

Basically all the values for air temperature compensation will have to be modified, because on my computer they werenít done right (the increase due to air temp was too small).  Same as Idol Air Control and a few other things.  Expect to have to modify all the tables, (and thatís a lot of tables).  Start from what they suggest and move on in the order the book suggests.

In case you were wondering the Holley book says, air density increases aprox. 1% for every 11įF drop in temp.  Itís not quite true because the rate of change changes with the temperature but thatíll give you a very good starting point.

Aaron

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Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
hellfish87gt
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« Reply #124 on: April 16, 2004, 07:44:30 pm »

well my first hurdle was the bad MAP sensor, so that was why i was suuuuuuuuuper rich. but now i have another one, and it's working better
but i still cant get a good idle but all the tables will need to be altered
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aaron88
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« Reply #125 on: April 22, 2004, 04:19:32 pm »

Passed E-Test today no problem.

Aaron

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Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
aaron88
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« Reply #126 on: May 03, 2004, 08:44:40 am »

If anyone wants to know what other people thought after getting a ride, check out this thread.

http://www.fierodrivers.com/forum/index.php?board=2;action=display;threadid=1637

Now that Iím on the road with this beast, this is how you will recognize me.

Aaron

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« Last Edit: June 22, 2006, 07:01:24 pm by aaron88 » Logged

Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
dguy
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Got vacuum. Want boost.


« Reply #127 on: May 03, 2004, 08:49:37 am »

Now that Iím on the road with this beast, this is how you will recognize me.

Cripes if Eric was given the gears over his simple licence plate cover, you're going to be in deep doo-doo for your rear plate!   Wink Grin
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1984: Track car project.
1985 SE: Dead 2.8, stalled L67 swap.
aaron88
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« Reply #128 on: May 03, 2004, 08:58:02 am »

Okay so I blanked out the plate on the photo, but I was referring to the exhaust.  I just think itís a good idea to blank the plate on internet photoís.

Aaron

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Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
GoFast85
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« Reply #129 on: May 04, 2004, 07:42:31 am »

You e-teted it as a 8 or as a stock 88?
Mine is going in next? week.
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aaron88
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« Reply #130 on: May 04, 2004, 01:23:42 pm »

I E-Tested as a hot-rod, V8, 4.6L (no cat's)

I wasn't able to go to Canadian tire to get this done because they had no idea how to test a hot-rod.  I went to the dealer to get it done.  They let me go in with the car and hook up my computer while they tested (I don't trust the mechanics to not hot-rod).

Aaron

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« Last Edit: May 04, 2004, 01:30:10 pm by aaron88 » Logged

Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
dguy
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Got vacuum. Want boost.


« Reply #131 on: May 20, 2004, 09:09:12 am »

Aaron,

What made you choose the Holley Commander over other aftermarket PCMs, or "hacking" a Caddy PCM?

-d.
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1984: Track car project.
1985 SE: Dead 2.8, stalled L67 swap.
GoFast85
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« Reply #132 on: May 20, 2004, 10:05:39 am »

Aaron -- which dealer?
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aaron88
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« Reply #133 on: May 20, 2004, 11:56:03 am »

What made you choose the Holley Commander over other aftermarket PCMs, or "hacking" a Caddy PCM?

Basically the story goes like this.

I had a friend of mine ask a friend of his if he would consider working on my Caddy computer for me.  I went to this guy because he is so good that it would be imposable to get better support from the GM engineers that wrote the code themselves.  This guy is that good.  But anyway; when this guy looked at the Cadillac computer he made a few discoveries that would require many hours of labour to remedy.  Basically if I was going to do the job right (I donít like doing it any other way) one of the chips on the board was going to have to be de-soldered have the code extracted and a new reprogrammable one put in itís place.  Outside of that there would still be an interface program to write and table tuning to do.  So although Stuart (computer guy) was willing to go through the labour, that expensive Holley Commander 950 was starting to look like a lot less trouble.  Two days later I told Stuart that I was going to go the Holley route, because to be honest, neither him or I had the time to spare.


Quote from: GoFast85
Aaron -- which dealer?

Bennett in Carleton Place.


Aaron

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Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
aaron88
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« Reply #134 on: June 04, 2004, 11:36:49 am »

Time for a little update;

The clutch is holding up, well but itís taking a little getting used to. It engages right on the floor.  Iím going to have to make a little notch in the carpet to get it to feel right, because as it is now I have to push fairly hard into the carpet to get the clutch fully disengaged.  Also notable is that I canít leave my foot resting on the clutch peddle between shifts because even that much pressure on the clutch is enough to make it slip at full torque.  Alternately I could have got the Kevlar clutch and saved a bit of money but then I wouldnít have gotten a clutch with such a good feel (the Kevlar clutch would have been all grabby and chattery during normal driving).  But itís a matter of personal preference as usual.

The transmission seems to be fine and the right axle has not given me any trouble.  I suspected that I might have a problem with the right (longer) axle because of the fact that I moved the motor (and therefore transmission) over but used the same axles.  I may still decide to add a half shaft and go with equal length axles but as it is now both tires will spin equally on take off, so there isnít much need for one right now, but Iíll have to see how much abuse the transmission will take before making a final decision.

Full throttle; no problem
Spinning the tires; no problem
All out rev her up and launch from a stop; not a good idea, in fact I havenít done this and donít plan on doing it.  I can launch fairly fast and with some tire spin but I fear giving it everything is going to result in loss of transmission parts.  So as far as how Iím driving the car?  And how hard one can drive the car with the combination of engine and transmission that I have?  I drive as hard as I want in any gear, I just donít rev then drop the clutch.  Instead I engage the clutch then hammer the gas, and trust me this is more than enough to spin the tires so be careful.

Spark advance;
Iím still working on this.  The holley commander that I got from CHRFab did not come with the knock sensor wiring.  Allen tells me that he never hooks up the sensor.  This doesnít boad well with me.  Therefore Iím going too hook up the sensor to an oscilloscope to find out how to get it wired into the computer.  The thing is (Iím told) that with an aluminum block itís much more tricky to get a knock sensor to work properly.  But Iíll get it to work with the holley and Iím sure itíll be simple in the end.  Once I have the oscilloscope hooked up I should be able to tune the spark tables fairly well, but for now the jury is still out.

Aaron

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Your only limitations are set from within, by a lack of vision.  But to have vision alone leaves the process idle.  Ergo, without action your thoughts are worthless.
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Ottawa Fiero Club Forum  |  General  |  Project Work Logs  |  Topic: Thinking Northstar Conversion? « previous next »
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