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High HP on Stock ECU

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Old 03-09-2011, 09:40 PM
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Originally Posted by Worm Boy
We have made 1500rwhp on RC twin turbo corvette at 24lbs of boost. Stock computer is limiting us as this boost level.
Good to hear. I'm running a factory PCM and 220# injectors shooting for that very rwhp#.
Old 03-10-2011, 11:03 AM
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Another factor is data logging. I'm not sure what you stock PCM guys are doing for data logging, but I know I'd be lost without my data. I use my BS3 for a boost controller, 2/3 step, TC module, and data logger. All for about $3k retail.

Can you stock PCM guys log driveshaft speed through the PCM? Or would you have to do that seperately somehow?

The stock PCM is fine to 1300 whp, maybe 1500, maybe more, but once you start spending money on WBO2, data logging equipment, 2/3 step modules, boost controllers, traction control devices, EFI Live, HP Tuners, whatever, etc. That's all money you could have invested into a stand alone system that can do so much more and basically has no limits.
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Old 03-10-2011, 11:12 AM
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Originally Posted by lafinrat
Another factor is data logging. I'm not sure what you stock PCM guys are doing for data logging, but I know I'd be lost without my data. I use my BS3 for a boost controller, 2/3 step, TC module, and data logger. All for about $3k retail.

Can you stock PCM guys log driveshaft speed through the PCM? Or would you have to do that seperately somehow?

The stock PCM is fine to 1300 whp, maybe 1500, maybe more, but once you start spending money on WBO2, data logging equipment, 2/3 step modules, boost controllers, traction control devices, EFI Live, HP Tuners, whatever, etc. That's all money you could have invested into a stand alone system that can do so much more and basically has no limits.
^^^^^this except for BS3 is ancient and there is stuff out that is way more modern, has even more logging, input and output capabilities out of the box at a lower cost. Data is VERY important if you want to get everything out of your setup and avoid catastrophic failure.
Old 03-10-2011, 11:35 AM
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data is king, i agree, is there a 2000.00 solution? harness and ecu? if i could find something like this with wideband i would jump on it. dont the low z injectors cost less as well?
Old 03-10-2011, 11:40 AM
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Originally Posted by 98Z28CobraKiller
...there is stuff out that is way more modern...
Maybe so, but only one holds these records:

- Quickest LS1 car on the planet - Moran/WW2 6.8
- Fastest LS1 car on the planet (on radials too) - Fereday 209
- Quickest and fastest turbo car on the planet - Personett 5.8/255
- Quickest and fastest radial car on the planet - Wolfe 6.5/227
- Quickest and fastest 10.5 car on the planet - Personett 6.0/250
- many, many more

I'm just sayin'
Old 03-10-2011, 11:45 AM
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I'd say if your going to invest in a 1000+hp engine, the expense of BS3 or whatever should be the least of the problems.
Old 03-10-2011, 12:04 PM
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I could see you saying that to a spark plug wire choice. deciding what will be controlling an engine is a major choice as well as one of the most expensive, if you look at it as a component to the over all set up.
Old 03-10-2011, 12:11 PM
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A main deterrent for me was that the BS3 isn't set up for running your factory gauges, AC, Cruise, etc. And for us street car guys that is a big deal. More recently I believe they added an option to piggyback the factory PCM to run the above but at that point, why run 2 PCMs. I looked into the FJO WB and engine datalogging software which is not too pricey.

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Old 03-10-2011, 12:15 PM
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The factory computer has a hard codded # of 255kpa. That is the biggest value on the table. We are in the process of coming up with ways to trick the system so we can tune for higher boost levels. Hope that answers your questions.
Old 03-10-2011, 12:30 PM
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Originally Posted by 93formto98T/A
A main deterrent for me was that the BS3 isn't set up for running your factory gauges, AC, Cruise, etc. And for us street car guys that is a big deal. More recently I believe they added an option to piggyback the factory PCM to run the above but at that point, why run 2 PCMs. I looked into the FJO WB and engine datalogging software which is not too pricey.
I put BS3 on an LT car and kept all the factory gauges, AC, cruise, etc. I completely removed the factory PCM, it took a little work but definitely easy stuff. I had to replace the AC pressure sensor with an older on/off style switch and rewire the input from the HVAC controls since the output was (+) trigger and the relay was (-) trigger, no big deal. And I used a signal converter from Dakota Digital to convert the AC VSS signal to a 12 vDC square wave, cheap and easy. That car makes 660 rwhp. I delivered to the owner (1000 miles away) and got 20 mpg on the way down. He drives the car all year and has had zero isses. That was in March 2008.

Is the LS car's gauges and AC more complex than an LT car?
Old 03-10-2011, 12:34 PM
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Originally Posted by lafinrat
I put BS3 on an LT car and kept all the factory gauges, AC, cruise, etc. I completely removed the factory PCM, it took a little work but definitely easy stuff. I had to replace the AC pressure sensor with an older on/off style switch and rewire the input from the HVAC controls since the output was (+) trigger and the relay was (-) trigger, no big deal. And I used a signal converter from Dakota Digital to convert the AC VSS signal to a 12 vDC square wave, cheap and easy. That car makes 660 rwhp. I delivered to the owner (1000 miles away) and got 20 mpg on the way down. He drives the car all year and has had zero isses. That was in March 2008.

Is the LS car's gauges and AC more complex than an LT car?
99 up cars use serial data from the PCM.
Old 03-10-2011, 12:37 PM
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Originally Posted by slow67
99 up cars use serial data from the PCM.
Got it. Ya that is a valid deterrent; although a Racepak UDx or those new Holley gauges are both pretty fantastic looking. And of course more damn money. But what's money these days right. Just buy everything.
Old 03-10-2011, 01:56 PM
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Originally Posted by Worm Boy
The factory computer has a hard codded # of 255kpa. That is the biggest value on the table. We are in the process of coming up with ways to trick the system so we can tune for higher boost levels. Hope that answers your questions.
yes on a e40, and e38 computer, but the older 411 box pcm's have 3 bar capabilties

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Old 03-10-2011, 02:06 PM
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Originally Posted by Ryne @ CMS
yes on a e40, and e38 computer, but the older 411 box pcm have 3 bar capabilties
I think most here need the availability of going past 3bar to make 2000hp like the op stated
Old 03-10-2011, 03:25 PM
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Originally Posted by Ryne @ CMS
yes on a e40, and e38 computer, but the older 411 box pcm's have 3 bar capabilties
what are you talking about when you say 3 bar? The map sensor?
Old 03-10-2011, 03:27 PM
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Originally Posted by Worm Boy
The factory computer has a hard codded # of 255kpa. That is the biggest value on the table. We are in the process of coming up with ways to trick the system so we can tune for higher boost levels. Hope that answers your questions.
Gota ya! Let me know when you figure that out! I would be happy with 1500whp though.
Old 03-10-2011, 09:00 PM
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Originally Posted by madmax4499
data is king, i agree, is there a 2000.00 solution? harness and ecu? if i could find something like this with wideband i would jump on it. dont the low z injectors cost less as well?
Holley Dominator EFI.
Old 03-10-2011, 09:04 PM
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Originally Posted by dreamls1
what are you talking about when you say 3 bar? The map sensor?
1 bar = about 103 KPA or zero boost/vacuum
2 bar = about 206 KPA or 14.7 psi of boost
3 bar = about 309 KPA or 29.4 psi of boost
etc
Old 03-10-2011, 09:11 PM
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Originally Posted by lafinrat
Maybe so, but only one holds these records:

- Quickest LS1 car on the planet - Moran/WW2 6.8
- Fastest LS1 car on the planet (on radials too) - Fereday 209
- Quickest and fastest turbo car on the planet - Personett 5.8/255
- Quickest and fastest radial car on the planet - Wolfe 6.5/227
- Quickest and fastest 10.5 car on the planet - Personett 6.0/250
- many, many more

I'm just sayin'
Can't argue that but it's been around forever.
Old 03-10-2011, 09:34 PM
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I thought you can run 3bar on the stock ecu? Am I wrong?


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