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Old 04-30-2002, 03:37 PM   #1
spacemonkey
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Default Link and Vishnu system

Ok i'm not asking which is better i'm asking what you guys have to say about each. I already emailed both companies and this is what i've got so far. AMR development said i could send them a used ecu and they could make a "plug n play system" for me. Another thing i'm interested in is the extra parts that come with the vishnu stage 2 (those besides the ecu itself). vishnu has yet to get back to me but I trust they will and hopefully answer some of those questions. basically like i said i just want some other opinons on each of the systems. also would it be wise to get a J+S in addition to the systems? Also one last thing. Looking to get the work done in southern cali this summer. Any shop recomendations? thanks guys
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Old 04-30-2002, 05:13 PM   #2
skywalker
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Well I am not going to say which is better because it is like comparing apples to oranges. Besides that my views are tainted, so that is unfair for me to compare the two products. It is up to you to choose.

All I will say is that I bought the Link Plus because of ease of use, plug-n-play and price. Reliability is great, I was able to put it in (plug-n-play with a harness) get a MAP loaded for it and was driving home.
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Old 04-30-2002, 07:00 PM   #3
Vishnu Performance
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No question that the TEC3 is the better system in virtually every respect besides cost. As for installation, both the TEC3 and the Link Plus are designed to be wire-in. We don't offer a plug in harness for the TEC3. Cost is the biggest difference. TEC3, without injectors is around $2400-- a good deal more expensive than the Link Plus. You are, however, getting near limitless upgradeability/flexibility with the several general purpose outputs/inputs, built-in secondary injector drivers, low imp. injector drivers, a more responsive US-based company to deal with, upgraded high output, long duration spark ignition system, on-board high speed data logging, etc,. Pick your poison....

Cheers,
shiv
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Old 04-30-2002, 09:30 PM   #4
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When choosing Stand alone engine management systems, I believe it comes down to what you need for your application. There are several systems out there that range in price and features. The questions you will have to ask yourself is, what functions do you need the stand alone system to do, how mechanically inclined you are to do the installation( do you want to do it yourself or get a shop to do it) and ultimately how much are you willing to spend. If you want to have a basic system that is easy to install and setup, the LINK2 is proably one of the easiest systems to setup and tune. It uses all the factory sensors, removes the MAF sensor and has the capabilities to be plug and play with optional harness. It is easy to return your car to stock since there is no major reworking of factory wires and sensors. It gives you all the basics that you would need for daily driving along with a few added optional features like boost controller, intercooler water spray, luanch control, shift light, and antilag. However if you need a system that requires you to control more auxillary items, the TEC2, TEC3 or any other higher priced systems is probably a better way to go. At the end of the day, any stand alone system will give you similar results for performance and driveabilty when it is tuned right. It is a matter of auxillary toys you want the systems to control that should govern which system you need to pick up. Hope this answers a lot of the questions people have in their minds.
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Old 04-30-2002, 09:41 PM   #5
racerwad
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Question electromotive ignition

as others have mentioned before, the biggest differences between the two systems, in my very limited understanding is their ability/availability of ancilliary devices. one item that i noticed is the fact that not only does the TEC control ignition through the curves, but it also has its own coils. how much of a real-life difference is this going to make?

also, i have a MY98 and i haven't seen a plug'n'play link yet. skywalker, how were you able to install a link without cutting/soldering any wires? thanks.

andy
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Old 04-30-2002, 09:56 PM   #6
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So far the only way to build a plug and play harness is to pick up a used Factory ECU, desolder the factory Female harness and solder it accordingly to the LINK2 wiring harness. If Gerry has come up with the Factory Subaru Harness plugs,you can buy those to solder it to the LINK2 harness.

AMR
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Old 04-30-2002, 10:31 PM   #7
STiTuner
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Is there a difference in the way that Anti-lag is controlled by the Link and the TEC? kinda interested to see if they use the same approach and what method they use.

Brad
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Old 04-30-2002, 11:03 PM   #8
Vishnu Performance
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Quote:
Originally posted by AMR MOD
At the end of the day, any stand alone system will give you similar results for performance and driveabilty when it is tuned right. It is a matter of auxillary toys you want the systems to control that should govern which system you need to pick up.
This has not been my experience. Often, with stock ignition systems, highly modifed cars will reach a point where ignition system bottles the output. That's why there is a market for less-than-idea band aids from MSD, Crane, Jacobs, etc,..

Spark limitations don't have to manifest themselves in the form of noticeable misfire, of course. More often than not, a system gets to a point where it cannot burn any more fuel you put into it. This is a combination of not having enough spark duration to keep a non-homogenized and swirling air/fuel charge in a stable burn as well as not having enough spark intensity to light it of in the first place. What you are left with with a system that simply does not want to make any more power beyond a certain point. Where that point is, however, is subject to debate. I've always found that a more capable ignition system has allowed me to make more power with less boost (which means less tendancy towards detonation). It also ensures that each and every combustion event is clean on the exhaust side with no combustible by-products left over to screw up the next engine event during valve overlap. This, again, means better engine VE and less tendancy towards detonation. If you do a search on www.miataforum.com (in the power section) you'll see that this topic has been beaten to death countless times. In the end, dynos and the sheer number of people who seen both sides of the story speak louder than words.

Just my 2c,
shiv
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Old 04-30-2002, 11:56 PM   #9
spacemonkey
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Thank you all very much. That is very informative. In response to someones suggestion, I am not really all that adept at the idea of controlling every aspects of my engines performance. In fact i'd be more satisfied if i could have the shop tune the system for me,(possibly showing me some of the key points so i might be able to tackle any probs down the road). This way i could be sure i've not screwed anything up too much. Also any good shops in so cal able to do this?
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Old 05-01-2002, 02:31 AM   #10
GimmeScoobySnacks
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I chose the LinkPlus for its price and because i don't understand all the concepts behind tuning a RS-T. I did not need all the tunability of a TEC because quite honestly i wouldn't know what to do with it. Also, i figured with the money i save i will buy bigger injectors and get it Dyno-Tuned and still be under the cost of a Tec3. So mostly price made my decision I got it installed at iSR and they street tuned it, but it is not running all that great. They did let me know ahead of time and highly recommended i get the car dyno-tuned. Its been like two months and my car hasn't blown up yet so they did a pretty good job of tuning it in a day.

Sid
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Old 05-01-2002, 10:11 AM   #11
Patrick L
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Shiv, is your TEC 3 setup ready for sale for the RS?
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Old 05-01-2002, 10:27 PM   #12
STiTuner
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Quote:
Originally posted by STiTuner
Is there a difference in the way that Anti-lag is controlled by the Link and the TEC? kinda interested to see if they use the same approach and what method they use.

Brad
Shiv can you answer this question?

Brad
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Old 05-02-2002, 12:55 AM   #13
Vishnu Performance
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Top_Dog-- Yes, the 2.5RS kit is available. It's virtually the same time as the WRX kit. Just different MAP sensor options and the inclusion of a boost control solenoid (the WRX already has one stock). It also uses different injector types with different sized rail spacers. Also a different crank triggered pulley.

STiTuner-- I'm not sure about anti-lag as I have never used any such device. I don't think it's currently offered with the TEC systems. Although I seem to recall a few TEC-II'd 323GTX rally cars running it somehow. I do believe that the TEC3 will be incorporating some type of programmable anti-lag in the near future. The hardware is more than capable but the software needs to be written. However, I don't think it's a big priority to them. Although I suppose I could get on their case if customers demand it. Although I can't see running it on anything short of a full blown rally car (one gets replacement turbos and exhaust components after ever couple of races).

Cheers,
shiv
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Old 05-04-2002, 01:10 PM   #14
PunKidd
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If ignition is a major concern when shopping for an ECU then the link should cover that too. You can pick up a Link 4x4 igniter to run one coil for each cylinder for around $450 from AMR and 15 bucks a pop for some generic coils form Summit racing. For about 500 bucks on top of the link youíve got a direct fire ignition. It's still cheaper that the Tec.
I don't know much about the Tec so I can't say whether or not the ignition systems at that point are comparable or not. Is the ignition duration on the Tec adjustable? I donít believe that it is on the Link, but if it is not on the Tec then they should yield somewhat the same results.
If you really wanted to go nuts then Iím sure you could get 4 MSD ignitions to run each coil. That would give you one hell of an ignition set up.
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