C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

GM HOT cam..

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Old Sep 11, 2018 | 11:23 AM
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Default GM HOT cam..

i recently purchased a Ruby Red 1993 40th anniversary c4, 6 speed to replace my 1994 auto , i was planning to do a HOT cam swap over the winter, then sold the 94 to buy the 93, im thinking i will need a tune after the cam swap , what is a good outlet to send the pcm to get tuned, or can the 93 be tuned vis laptop ?
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Old Sep 11, 2018 | 01:50 PM
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PCM of NC.

I'm running one of their mail order tunes on my hotcam 40th and it has been great with idle set at 875rpm. Just did some logging this week and shared it with them...no concerns.
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Old Sep 11, 2018 | 01:55 PM
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Good to hear the tune is good on the Ruby! 9T3Vette will be of great help I'm sure. OP, are you going to do longtubes as well?
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Old Sep 11, 2018 | 02:59 PM
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Find yourself a good tuner that will dyno tune or datalog tune. Once you have that, you can work with them on what heads go with what intake and LT headers and cam, etc. It has to work as a system and not a cam from here, heads from there, intake from over there, etc.
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Old Sep 11, 2018 | 04:00 PM
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Originally Posted by 1993C4LT1
Good to hear the tune is good on the Ruby! 9T3Vette will be of great help I'm sure. OP, are you going to do longtubes as well?
yes lt are in the plans as well, with some port matching intake and porting of heads, im not looking for a radical change , just a nice bump in performance.
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Old Sep 11, 2018 | 04:07 PM
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Originally Posted by ervinc
yes lt are in the plans as well, with some port matching intake and porting of heads, im not looking for a radical change , just a nice bump in performance.
Call Lloyd Elliott

www.elliottsportworks.com
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Old Sep 11, 2018 | 04:24 PM
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Originally Posted by ervinc
yes lt are in the plans as well, with some port matching intake and porting of heads, im not looking for a radical change , just a nice bump in performance.
I hear you. Same here later on.
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Old Sep 11, 2018 | 09:58 PM
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I'm thinking of going the same route. I have a 93 auto that only has 35k miles and is stone stock except for muffler elims. In a week or so I'm swapping in a D44 with 3.45 gears. I want a smidge more out of it but it needs to stay emissions compliant so I'm thinking a full Hotcam kit and mail order tune (since none of the tuners locally want anything to do with LT cars). Was hoping someone would chime in with results/impressions that had done this.

Side note: GM has a $75 rebate on this kit if you buy it this month.
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Old Sep 11, 2018 | 10:38 PM
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Originally Posted by Wharf Rat
I'm thinking of going the same route. I have a 93 auto that only has 35k miles and is stone stock except for muffler elims. In a week or so I'm swapping in a D44 with 3.45 gears. I want a smidge more out of it but it needs to stay emissions compliant so I'm thinking a full Hotcam kit and mail order tune (since none of the tuners locally want anything to do with LT cars). Was hoping someone would chime in with results/impressions that had done this.

Side note: GM has a $75 rebate on this kit if you buy it this month.
How about Arizona Speed and Marine? They were Accel EMIC at some point and they had L98 stuff so maybe if you ask nicely, someone can and will dyno tune?
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Old Sep 11, 2018 | 11:47 PM
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A basic port job on the stock heads, minor intake work even with stock valves will pick up nicely and doesnt cost a fortune.
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Old Sep 12, 2018 | 09:51 PM
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Ed wright fast chip did mine.

was an amazing wakeup on the car.

92-93 ecm speed density is super dependant on o2 sensors, only use ac delco and dont dare solder o2 sensor wire extensions if you go to long tube headers.

need to use proper extension wiring harness and/or posi lock style connectors.

otherwise can end up with rich idle
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