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Old 10-11-2004, 06:50 PM   #1
Rickyh
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Default vf39 and stage 4 base map

Is it feasible to run the basemap with this turbo with minimum editing of the map? I just got my utec working after screwing around with the wrong cables. I have read everything I can find and I believe I grasp the concept of tuning with the utec, I don't know if I feel comfortable making a lot of changes just yet. (I guess I am saying that I am kind of scared of trying to tune myself). I have a wideband and an egt so I am not going to be guessing at a/f and such. If I am right the difference is that I won't be able to run quite as muc timing. Does this sound right?
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Old 10-12-2004, 06:58 PM   #2
jawbrkr
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It is completely safe to run the base map. It has a lot of fuel, good timing.. but honestly you're probably pushing only 260-270awhp with the base map. The rest comes out from tuning.

As far as the turbo, the turbo only effects the boost characteristics. Quick spool, late spool, capabilities to hold more boost. Which can also be modified with tuning.

I suggest, read up on it.. and tune it in tiny increments.. for example.. dial in your boost, run on it, then change it if it needs to be changed. Then work on timing, advance it, until it knocks, and take it a step back. You can advance like 3 degrees in the lower rpm range for a week see how it runs.

As fuel goes, you have an advantage, you can lean it out and know what your a/f is. With the tools you have right now, you do not need a dynotune if you have the time and willing to road tune. Personally 400 bucks for a dynotune is a lot of money.

Also if you have somebody local who can help you tune, and knows the utec, and learn from him, that'll be a lot easier to pick things up from.

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Old 10-12-2004, 08:14 PM   #3
Rickyh
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Thanx for the response. I don't know anyone else around here with a utec. Hell, I've only met one other person with a subie. I am definately willing to learn, and I am in no rush. When I first hooked everything up, I would get occasional flashing cel's, which are supposed to be detonation. the funny thing was, I was only boosting about 10 psi. I checked the knock sensitivity and they were all set at 95 or higher. I did some searching and it seems that that is a bit high, cuz there is no way it should knock at under 10 psi. Anyway, the car pulls hard, with the exception of some low end part throttle hesitation, which I just read how to tune out. I just need to remember to take my time. Thanx again for the info.
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Old 10-12-2004, 08:55 PM   #4
jawbrkr
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Post up some logs, we'll take a look at it (The board) another excellent resource is http://www.wrxhackers.com, yea it shouldnt be misfirering or knocking at 10psi... unless timing is way off or its being starved of fuel.
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Old 10-12-2004, 09:00 PM   #5
Rickyh
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I checked the parameters. some of them were wrong. Now everything is as it should be. (except for the leaking oil line). I played around with logging today. Should I use log 1 or 2?
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Old 10-12-2004, 09:20 PM   #6
hippy
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number 1. ya might wanna start by running low boost and seeing what the a/f ratios are like before bumpin it up higher.

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Old 10-12-2004, 10:07 PM   #7
Rickyh
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at 17-18 psi, it is around 10.3-10.5 at wot, so I should have a little room to play with.
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Old 10-12-2004, 10:26 PM   #8
hippy
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That depends on your car and how you wanna drive/tune. The richer the a/f ratio the cooler the engine will be at a given point(given all other things are equal). You can lean out the a/f ratio as much as you want til ya start experiencing det or til you think the egt's are getting too hot. I try to(and do) stay under 1550F cause I hear that's about the breaking point. It would probably be better for the engine to keep it under 1500F most of the time.

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