N/A 3800 II with S/C top swap - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-28-2013, 06:05 PM   #11
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Oh btw mike your icm / sc idler bracket seems to be different than mine
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Old 07-28-2013, 06:07 PM   #12
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yea i may end up running it as a NA without the sc belt untill i can get tuning software... $499 shipped with everything i need to tune and flash and vin code
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Old 07-28-2013, 09:35 PM   #13
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You can run it with the supercharger just as long as you run 93 octane. The only thing the PCM does with the boost valve is open it if it sees too much boost(yea right) or if it sees too much KR.

Which reminds me. Running a top swap such as your doing, you need to find someone that has done the same thing, and copy everything change in the programming that'* been done. This is NOT a simple swap and drop. Things are different all because of the higher compression pistons.
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Old 07-28-2013, 11:21 PM   #14
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SO i couldn't run a stock sc tune? and what do you mean i can run my na pcm>???

and uh no one i know has done a na to sc swap.

they all do turbo swaps to the sc blocks cus of the forged internals which is basically just forged connecting rods i know that... big deal lol as both have same cranks cus from what ive seen both are standard cast cranks.

also as stated before i am trying to figure out the mounting for my icm...

Also ive tried D-HP on my pcm... it would communicate but not flash the pcm any thoughts on that?
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Old 07-28-2013, 11:39 PM   #15
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If you swap over the super and injectors, the stock tune would be way to aggressive for the engine. The PCM would actually be commanding the injectors to dump way too much fuel.

This isn't just a simple swap and play. You actually need to be able to scan and tune at the same time.
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Old 07-29-2013, 12:17 AM   #16
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OK stock sc tune or na tune?

what if i run na injectiors for now?
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Old 07-29-2013, 12:19 AM   #17
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everyone i originally talked to said this would be an easy swap... so far its taken a month to figure out... this is my daily driver so i need it running by any means possible at this point and then performance can be done that is why i was going to run NA on the NA pcm just by removing the SC belt
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Old 07-29-2013, 11:53 AM   #18
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The L36 injectors are too short for the way the fuel rail mounts. I'd if you do have to drive it, just stay out of boost.

As far as the tune goes, I don't know how a SC tune would work. Remember, we are dealing with a higher compression engine(L36 9.4:1) vs the (L67 8.5:1)
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Old 07-29-2013, 05:37 PM   #19
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Hmmmm.... a bit of dilemma lol
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Old 07-29-2013, 06:15 PM   #20
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AHAHAHAHA sh***y sig lmao good enough for me for now lol dont have a way to cut out my car from a pic to remove background

anyway.... UPDATE

Im about to sepparate old motor from trans. First i must suspend it all in the air to remove bellhousing little cover and starter. my only problem....
the TC bolts... egine is completely seized... tried 4 ft bar on crank and didnt budge while it was still in the car...

so i will have to leave the tc on for now. my only worry is... Im here alone and im bout to lay under this stuff while suspended by an engine hoist. if it falls im SOL no one to help me get out and by the time anyone is aroun d to help it would be too late as my room mate dont get out of work till 11pm n she still wouldnt even know what to do lol.

so LOL if i dont post in 12 hrs well you can guess what happened XD lmfao
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