Datamaster... First Use
10-23-2001, 07:10 PM
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Datamaster... First Use
Well I just got the cable in the mail today. Im gonna have LOTS of questions, but where can I find info on what all of this means and how to use it. Currently Im using Datamaster Demo and need to either use its full version (pricey...) or use Craigs software. Datamaster sure seems impressive though. Anyway the mods are in the sig... but what should I look for?
Heres what Ive noticed looking over the data so far. I recorded several EGR DC's code 32... Which had set occasionally in the past... Is this anything I should be worried about or no? I noticed that it says Err DC in the corner and when I checked every code was green except for EGR 32 which was red... I assume that means thats the only prob there... Anyway I also noticed that my map KPA value is at like 50 at idle... To high? Is that due to the cam I have or could is it likely a leak. The cam is LT4 Hot Cam... Anyway Im still lookin at all this but there is an awfule lot of info and I dont know where to start. I have all the stuff to start burning. One clarification, can I leave the stock prom in the chip if I use a piggyback with a burned prom. I believe I can but want to make sure it wont effect anything.
Paul
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90 Red Convertible
100k running great
ZAINO!!!
383 Stroked.... LT4 Hot Cam... Forged Elgen Pistons Scat 9000 Crank Elgen 5.7" rods New Lifters w/ 1.6 Rockers and hardened Pushrods Super Ram Intake Hooker Headers and Y pipe into Gutted Cat with Monza Mufflers (WAY TO LOUD!!) Adj Regulator K&N Shift Kit High stall converter 160 termo, ZR1 Rims.... Red Calipers....Alpine head unit, Kenwood 6x9 4 ways, Polk DX 6 1/2 compnents, MTX 240 amp, Viper 550 alarm,
www.corvetteforum.net/c4/nomar116/
Heres what Ive noticed looking over the data so far. I recorded several EGR DC's code 32... Which had set occasionally in the past... Is this anything I should be worried about or no? I noticed that it says Err DC in the corner and when I checked every code was green except for EGR 32 which was red... I assume that means thats the only prob there... Anyway I also noticed that my map KPA value is at like 50 at idle... To high? Is that due to the cam I have or could is it likely a leak. The cam is LT4 Hot Cam... Anyway Im still lookin at all this but there is an awfule lot of info and I dont know where to start. I have all the stuff to start burning. One clarification, can I leave the stock prom in the chip if I use a piggyback with a burned prom. I believe I can but want to make sure it wont effect anything.
Paul
------------------
90 Red Convertible
100k running great
ZAINO!!!
383 Stroked.... LT4 Hot Cam... Forged Elgen Pistons Scat 9000 Crank Elgen 5.7" rods New Lifters w/ 1.6 Rockers and hardened Pushrods Super Ram Intake Hooker Headers and Y pipe into Gutted Cat with Monza Mufflers (WAY TO LOUD!!) Adj Regulator K&N Shift Kit High stall converter 160 termo, ZR1 Rims.... Red Calipers....Alpine head unit, Kenwood 6x9 4 ways, Polk DX 6 1/2 compnents, MTX 240 amp, Viper 550 alarm,
www.corvetteforum.net/c4/nomar116/
10-23-2001, 07:26 PM
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I'm reading through this.... And have found more and more info... So Ill list what I can...
Trip was 7 miles over 40 minutes according to the info it calculated... Alot of idle time was spent in a busy area
Set 5 knocks the entire time, no Knock retard the whole trip, with varying spark advance.
At times it seemed both the EGR DC value and CCP DC value would jump up one time both at 100%.
I also noticed that very very frequently, especially at what apears to be no throttle the L TermC or BLM is at 108...Seems rather bad.... But to be expected? Lots of readings on other stuff as well please guys any guidance?
Trip was 7 miles over 40 minutes according to the info it calculated... Alot of idle time was spent in a busy area
Set 5 knocks the entire time, no Knock retard the whole trip, with varying spark advance.
At times it seemed both the EGR DC value and CCP DC value would jump up one time both at 100%.
I also noticed that very very frequently, especially at what apears to be no throttle the L TermC or BLM is at 108...Seems rather bad.... But to be expected? Lots of readings on other stuff as well please guys any guidance?
10-23-2001, 07:49 PM
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Your idle and low BLMs are to be expected because of your cam. My idle is around 50 kPa and my BLMs were around 115 or so until I edited my VE tables. See my cam info in my signature.
Sorry, can't help with the EGR question.
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1991 Chevy C2500HD 5.7L HD. 16147060 ECM
Mods: Crane PowerMax 2030 cam 204I 214E @ .050 and 423I 446E lift, Jacobs Pro Street Ignition System. Using DataMaster and TunerCat with $85 ECM files.
Sorry, can't help with the EGR question.
------------------
1991 Chevy C2500HD 5.7L HD. 16147060 ECM
Mods: Crane PowerMax 2030 cam 204I 214E @ .050 and 423I 446E lift, Jacobs Pro Street Ignition System. Using DataMaster and TunerCat with $85 ECM files.
10-25-2001, 11:40 AM
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<font face="Verdana, Arial" size="2">Originally posted by davidjon_99:
Your idle and low BLMs are to be expected because of your cam. My idle is around 50 kPa and my BLMs were around 115 or so until I edited my VE tables. See my cam info in my signature.
Sorry, can't help with the EGR question.
</font>
Your idle and low BLMs are to be expected because of your cam. My idle is around 50 kPa and my BLMs were around 115 or so until I edited my VE tables. See my cam info in my signature.
Sorry, can't help with the EGR question.
</font>
383 stroker, 64cc 23deg trickflow heads c/w weiand xcelerator single plane, adapter, cam is an extreme 4x4 comp. Cam. 12-235-2 grind ( .447/.462 lift, duration 210 218 lift @50, 111 lobe separation) . unit has hypr. Flattop floating pistons, eagle cast crank, 5.7eagle rods. 10.2:1 comp. Headers c/w 2.5” flowmaster exhaust. 16147060 pcm, $85def
454tbi 80lbinjectors
10-26-2001, 08:03 AM
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<font face="Verdana, Arial" size="2">Originally posted by prscarf:
50kpa? this is way high if your truck is still running the stock intake. your cam is mild. something wrong. my motor never ran over 40kpa even with a with a single plane and a larger cam! the dual plane even ran around the 30 mark when i had this on. check for leaks.
</font>
50kpa? this is way high if your truck is still running the stock intake. your cam is mild. something wrong. my motor never ran over 40kpa even with a with a single plane and a larger cam! the dual plane even ran around the 30 mark when i had this on. check for leaks.
</font>
Haven't found any leaks yet, but I'll keep looking. I do have a less restrictive intake than the old tube that went to the fender. Are you using a K&N setup or something like that?
Just curious, what heads do you have on your truck? I've got those "High Swirl" heads.
You can see an example here: www.sallee-chevrolet.com/Cylinder_Heads/350truckSPH.html
From what I understand they're pretty crappy for anything but low end torque.
------------------
1991 Chevy C2500HD 5.7L HD. 16147060 ECM
Mods: Crane PowerMax 2030 cam 204I 214E @ .050 and 423I 446E lift, Jacobs Pro Street Ignition System. Using DataMaster and TunerCat with $85 ECM files.
10-26-2001, 09:07 AM
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<font face="Verdana, Arial" size="2">Originally posted by Nomar116:
So are MINE high.... And what should I start out modifying to pull down the blms and get everything evened out.
Paul</font>
So are MINE high.... And what should I start out modifying to pull down the blms and get everything evened out.
Paul</font>
I worked with the Volumetric Efficinecy (VE) vs RPM table to dial in my BLM as close to 128 as possible. I monitored my engine for several weeks while driving to and from work. I use DataMaster and was able to export the MAP, BLM, RPM data for every file I created. I imported that into Excel and broke down each RPM and MAP range to match the VE table's RPM and MAP ranges (+-25 rpm) and averaged the BLM.
From that, I knew how far away, percentage wise, I was from 128. I then reduced (if you're below 128) or increased (if you're above 128) the VE number for that RPM/MAP range based on the percentage.
There is a web site that goes through this somewhere, but I don't have my link here at work.
------------------
1991 Chevy C2500HD 5.7L HD. 16147060 ECM
Mods: Crane PowerMax 2030 cam 204I 214E @ .050 and 423I 446E lift, Jacobs Pro Street Ignition System. Using DataMaster and TunerCat with $85 ECM files.
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10-26-2001, 04:45 PM
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That link would definately help. Im still trying to figure out tunercat but am getting there. Im trying to find the definition file, as I bought it from someone... Nonetheless Im struggling through that. Paul
10-26-2001, 11:19 PM
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<font face="Verdana, Arial" size="2">Originally posted by Nomar116:
That link would definately help. Im still trying to figure out tunercat but am getting there. Im trying to find the definition file, as I bought it from someone... Nonetheless Im struggling through that. Paul</font>
That link would definately help. Im still trying to figure out tunercat but am getting there. Im trying to find the definition file, as I bought it from someone... Nonetheless Im struggling through that. Paul</font>
Pay close attention to the VE - Volumetric Efficiency and the Block Learn sections.
the article uses inches of vacuum instead of KPa, but 45 KPa is around 17 inches (pretty normal idle vacuum), 50 KPa is around 15.2 inches, and 60 KPa is around 12 inches.
Good Luck.
------------------
1991 Chevy C2500HD 5.7L HD. 16147060 ECM
Mods: Crane PowerMax 2030 cam 204I 214E @ .050 and 423I 446E lift, Jacobs Pro Street Ignition System. Using DataMaster and TunerCat with $85 ECM files.
