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Lexuspros.com ECU rebuild commentary

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Old 08-01-03, 07:51 PM
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DaveGS4
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Originally posted by SC400-V8
Actually, it sucks but theres no place around here that can dyno my car, The only way I can tell differences is what I feel in my driving around....
Thanks Jay.

Does the company that did the work have dynos posted somewhere? Didn't see any on their website.

Reason I ask is that it seems like such a definitive number "+40 hp, +70 tqe (30 wheel hp, 50 wheel tqe)" that there has to be some detailed dyno before/after to back that sort of claim up somewhere.

Don't get me wrong, not doubting the improvement or anything and I think it's great that there is what sounds like a great option for some easy HP! Would be interested in something similar for my GS; manufacturers claims of high HP increases don't usually seem to hold out on the dyno for our cars, however. Probably not as much room for improvement in efficency.

Click here for dynojet locations in your neck of the woods.

Last edited by DaveGS4; 08-01-03 at 07:57 PM.
Old 08-02-03, 03:48 AM
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Vegassc400
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Last time I looked they had dyno sheets posted. Check the ecu upgrade.

www.lexuspros.com
Old 08-02-03, 08:24 AM
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Originally posted by Vegassc400
Last time I looked they had dyno sheets posted. Check the ecu upgrade.

www.lexuspros.com
Oh yeah, there it is at the bottom, thanks.

http://www.lexuspros.com/dyno.htm

Looks like a pretty good increase across the board. Would like to see a 'normal' dyno single gear HP and TQ pull rather than shifting, but both are useful. Looks promising!
Old 08-02-03, 11:00 AM
  #19  
asnatlas
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Default With technics ....

Originally posted by technics
Can I expect the same performance increase on the SC300 with the ECU rebuild? I didn't see any stats.
I am with technics, I have a 92 SC300 and I was also looking at the ECU upgrade. But I wanted to see something on what this would do for me as far as the ECU upgrade on a stock 300. Also if my car is stock and I am not looking for anything else other then the ECU which upgrade would I need... The one for $850 or the full one for $1250 I am looking to keep the car stock as far as performance mods other then the ECU upgrade if I went with it....

Please let me know
Shawn
Old 08-02-03, 05:43 PM
  #20  
Vegassc400
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Does this upgrade also advance the timing? if so, how much?

Only reason I'm asking is because I want to add a 75 shot of nitrous and I can't do it with the ECU I'm running now. Too much timing adavance = me looking for a new 1uz.
Old 08-03-03, 12:33 AM
  #21  
Legends6spd
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why does it only say
92-96? what is so special about the '97 that the ECU cant be reprogrammed?

also, what side effect other than decrease MPG does this upgrade have?
Old 08-03-03, 05:11 AM
  #22  
legendary
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Originally posted by Vegassc400
Does this upgrade also advance the timing? if so, how much?

Only reason I'm asking is because I want to add a 75 shot of nitrous and I can't do it with the ECU I'm running now. Too much timing adavance = me looking for a new 1uz.
Hey Vegas there is an upgrade available for running NOS.
See here: http://www.lexuspros.com/cgi-bin/sto...product=scchip

And Legend, remember I think the 97+ SC's are OBD-II, that may play a part in the ECU tuning not being available

Last edited by legendary; 08-03-03 at 10:03 AM.
Old 08-03-03, 09:51 AM
  #23  
Legends6spd
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Legendary,

I have a '97 and it does not have VVTI. It's only on '98+ SC's

I wonder what dyno #'s would be for SC300's manuals. $1250 is pretty cheap for +40hp +70tq
Old 08-03-03, 10:05 AM
  #24  
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my bad Legend, I was thinking of the wrong car. I edited my post above
Old 08-03-03, 11:38 AM
  #25  
SC400-V8
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Its all good, The thing with it is, after first reseting the computer and then calibrating it after running 0-100 full throttle 3 times, it has insane power... It thrills me greatly for the first few days but after a while it seems to fade a little. Im thinking when i take it to the track I'll run the 1/4 mile like 5 or 6 times and reset my computer before the first times in the hope that the power increase will stay with the ecu permanently.
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