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09-21-2009, 05:23 PM #1
When do you need an aftermarket computer?
I know having a LT1 that goes over 7000RPM is one reason to have an aftermarket computer. What are the other limiting factors to why you would absolutely need one in N/A? I want to build a bigger N/A motor for mostly street use and kind of want to keep it simple by keeping the stock computer. Even though my future build may not have high enough power to absolutely need one but I am wondering at what point you need to start really considering an aftermarket unit.
Last edited by Firebat; 09-21-2009 at 05:31 PM.
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09-21-2009, 09:42 PM #2Lurker
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id love to know this answer. and want to know wat computer everyone uses
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09-23-2009, 10:09 PM #3LTX Regular
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Boost. When running a pretty good amout of boost (probably above 14), the LT1's are a PAIN to tune properly.
N/A or spray below 7K rpm and your good to go.
94 Camaro: 10.57@127, AI H/C, stock bottom, 150 n20, TH400, 8.8 rear (11.49@119 n/a T56)
99 Z28 1SC Stripper: 5.3, S480, Th400, MWC 9"
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09-24-2009, 05:18 PM #4Long Live the Opti
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09-24-2009, 06:08 PM #5
The LS1 computer conversion cost is right up there with standalone's.
mpe331lx is spot on though... Only thing I might add is that they are a pain to tune as soon as airflow maxes out the MAF (8-10psi). At which point you are stuck with using PE tables (Power Enrichment, an amount of fuel added dependent on rpm).
However doable, its not accurate and you will run the risk of engine damage.- Justin
Custom tuning with HpTuners and your most common standalones.Originally Posted by WJ Birmingham
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09-24-2009, 08:14 PM #6LTX Regular
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Yes and no. If you buy everything new with a complete harness, yes it will be costly. But if you purchase the basic kit, a used ls1 PCM and coils, do the DIY wiring harness mod kit, you can have it all together for a bit less then half of a stand alone setup.
When the time comes to replace the stock bottom end in stephs car with the 383, we'll be going with the EFIconnection ls1 pcm conversion for sure.
94 Camaro: 10.57@127, AI H/C, stock bottom, 150 n20, TH400, 8.8 rear (11.49@119 n/a T56)
99 Z28 1SC Stripper: 5.3, S480, Th400, MWC 9"
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09-24-2009, 09:59 PM #7Long Live the Opti
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09-25-2009, 02:35 AM #82008 TrailBlazer SS 12.34 at 108.2 bolt ons FOR SALE
1983 Rx7 - 2560lbs 5.3/TC78 9.93 at 144.7, driving to the track and driving home
1996 formula - budget bolt on setup
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09-25-2009, 04:35 PM #9
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09-28-2009, 01:41 PM #108.453 @ 163.58 mph (best mph 164.27)
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