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C4 Corvette Performance Chips, ECM/PCM Modifications, Dyno Tuning, Fuel Management, Tuning Software

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Old 12-29-2004, 05:37 AM   #1
Hawaiian Punch
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Default I hope you can help me out here.

a starter tune info for a L-98 with the hotcam installed so I can burn it on a chip and have a good base to start on with my tuning please?

Last edited by Hawaiian Punch; 12-30-2004 at 03:46 AM.
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Old 12-30-2004, 01:10 PM   #2
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Man, I know you're looking for some help but I guess none of us has anything....

I would recommend making one chip that stays in Open loop (set the Minimum Coolant Temp for CL really high), then add maybe 10% fuel in the higher LV8 values (say LV8's 80-100 and up to spare idle). Then take the car out and do progressively faster accelerations until you either see a drop in O2 readings or knock. Then adjust accordingly (add more fuel until O2 volts are ~900ms) and work up to WOT runs. If still knock and you know it's getting plenty of fuel, then start to reduce timing in affected areas. After that, you can worry about idle, PE and part throttle stuff.

Others may have different ideas, but that should get you on the right track and give you a baseline- and your tables may look different depending on the ECM and mask. But basically increase the Open loop vs load tables by an appropriate amount, and then see how close you are by datalogging. Because every engine is different, I doubt too many people will have BINs they want to send you (and honestly, you probably don't want some butchered BIN anyway). But I'll help you any way I can with what little I know about tuning.

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Old 12-30-2004, 02:43 PM   #3
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Quote:
Originally Posted by Ramanstud
Man, I know you're looking for some help but I guess none of us has anything....

I would recommend making one chip that stays in Open loop (set the Minimum Coolant Temp for CL really high), then add maybe 10% fuel in the higher LV8 values (say LV8's 80-100 and up to spare idle). Then take the car out and do progressively faster accelerations until you either see a drop in O2 readings or knock. Then adjust accordingly (add more fuel until O2 volts are ~900ms) and work up to WOT runs. If still knock and you know it's getting plenty of fuel, then start to reduce timing in affected areas. After that, you can worry about idle, PE and part throttle stuff.

Others may have different ideas, but that should get you on the right track and give you a baseline- and your tables may look different depending on the ECM and mask. But basically increase the Open loop vs load tables by an appropriate amount, and then see how close you are by datalogging. Because every engine is different, I doubt too many people will have BINs they want to send you (and honestly, you probably don't want some butchered BIN anyway). But I'll help you any way I can with what little I know about tuning.

Thanks Ramanstud for replying, if the fuel is high, how would I go about bringing it down? what areas should I go in oder to do this?
I stuck a hot cam in the car and so now the MAP is reading that the throttlebody is more open then it really is cause of the lose of presure in the plenum I would guess, so now it's dumping in lot's of fuel.
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Old 12-30-2004, 04:14 PM   #4
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honestly, all of my tuning is on MAF cars, so I can't give specifics with the SD systems. This could be more complicated than you might think, so I don't want to throw out blind suggestions. If you go over to thirdgen.org and log in, their archived posts and DIY Tuning boards are top-notch. there's a ton of SD stuff over there to read.
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Old 12-31-2004, 03:43 AM   #5
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Originally Posted by Ramanstud
honestly, all of my tuning is on MAF cars, so I can't give specifics with the SD systems. This could be more complicated than you might think, so I don't want to throw out blind suggestions. If you go over to thirdgen.org and log in, their archived posts and DIY Tuning boards are top-notch. there's a ton of SD stuff over there to read.
Cool!! mahalo once again for your reply and much needed help, I'll go over there and check it out.
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Old 12-31-2004, 12:16 PM   #6
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Punch Check your Mail
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Old 12-31-2004, 04:42 PM   #7
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I had my share of trouble with Speed Density.. but once you ge the hang of it it isnt to bad..

To help you tune your fuel map I recommend getting VEmaster (its a program that can read your datamaster datalog files and adjust your fuel map tables in your .bin file accordingly... as for spark.. I know you probably can add a bit more in the 80kpa-100kpa range in the low rpms and take a few degrees out in the upper rpms.. but I'm sure someone else already has some of these tables for the L98 mapped out.. good luck
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Old 12-31-2004, 08:33 PM   #8
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Originally Posted by 383_BluByU
I had my share of trouble with Speed Density.. but once you ge the hang of it it isnt to bad..

To help you tune your fuel map I recommend getting VEmaster (its a program that can read your datamaster datalog files and adjust your fuel map tables in your .bin file accordingly... as for spark.. I know you probably can add a bit more in the 80kpa-100kpa range in the low rpms and take a few degrees out in the upper rpms.. but I'm sure someone else already has some of these tables for the L98 mapped out.. good luck

Datamaster will not work for Ease scan files.. However, i made a similar program to VEMaster that I use on my Car.. It is also not limited to the same ceiling as VEMaster. the BLMs are now 128 +/-4

Punch,

Send the bin you used for scanning along with the Ease scan file and I will run it through my program.

Jeff
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Old 12-31-2004, 08:33 PM
 
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Reload this Page OK, I'm gonna try asking this once more, I hope you can help me out here.
 
 
 
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