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LS3/4L70E into C4 Corvette

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Old 02-22-2010, 04:44 PM
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Default LS3/4L70E into C4 Corvette

Hello everyone,

The L98 unfortunately gave up on my daily driver after 159,000 miles. It was blowing oil out of everywhere, and the day before it was pulled it started a small under hood fire that I was thankfully able to put out. That was scary because it melted the passenger side hood release cable and I was unable to open the hood on the right side.

Having had a few cars with TPI motors and missing the LS1 in my old '02 WS6 I decided to go with a LS3 for this car.

Here are a few pictures of the car before and my progress up to now.









The white dust is from the fire extinguisher.





Fire damage.







Junk LS1 test fit.





Burned cowl seal and A/C box



No wonder my A/C ducts were barely flowed any air.



The new evaporator is finally in.



C6 intake I will be using



LS3 is in as of 2/21. Waiting on my wiring harness.





Pan clears



Old 02-22-2010, 04:55 PM
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Looks good so far...keep it up!
Old 02-22-2010, 05:08 PM
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Damn What dash are you going with? tranny?
Old 02-22-2010, 11:32 PM
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Originally Posted by 3.8redbird
Damn What dash are you going with? tranny?
Factory dash. Trans is a 4L70E out of a Trailblazer SS with the C4's original 700R4 tailshaft bolted on.
Old 02-22-2010, 11:38 PM
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Originally Posted by Agent13
Factory dash. Trans is a 4L70E out of a Trailblazer SS with the C4's original 700R4 tailshaft bolted on.
How are you adapting the factory digi dash to work with the new senders?
Old 02-23-2010, 01:11 PM
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I'mma watch you... Lookin' good. I'm doin the same thing to my 85 vette. I'm going a little more stripped down tho...lol
Old 02-28-2010, 10:59 PM
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Trans, Driveshaft, C-beam are in. Was too tired to take any good pics.





Originally Posted by 3.8redbird
How are you adapting the factory digi dash to work with the new senders?
Simple. The factory ECM has nothing to do with the gauges. You just add the original sensors to the new motor. The only thing that is lost is the Instant/Average MPG.

Last edited by Agent13; 03-09-2010 at 10:34 PM.
Old 02-28-2010, 11:09 PM
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awesome. going powersteering still? This swap with VVT is what I want so I can take my 383 out and put it into my cj7
Old 03-09-2010, 10:48 PM
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Originally Posted by 3.8redbird
awesome. going powersteering still?
Absolutely. This is my daily driver and comfort is a must!

Old 03-10-2010, 09:12 AM
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Very cool. I'd love to do this with my 91 Corvette if I wasn't selling it to fund the LSx swap in my IROC.
Old 03-10-2010, 09:24 AM
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Glad you are saving this one, looking good!
Old 03-10-2010, 08:45 PM
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What oil pan and mounts are you using? I want to do this same swap to an 86.
Old 03-10-2010, 09:52 PM
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Looks very nice. Glad to see the fire didn't go any further.
Old 03-10-2010, 11:32 PM
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Noticed you are using a 6 bolt to 4 bolt adapter on the tailhousing. How did that work out? is the 700r4 housing that much shorter than the 60e that there is room for that adapter or did you have to move the engine/trans forward to make the torque arm mount end up in the right place?
Old 03-22-2010, 01:02 AM
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http://www.youtube.com/watch?v=HUYJ8CEvjJU
Old 03-22-2010, 01:04 AM
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Originally Posted by G-Body
Noticed you are using a 6 bolt to 4 bolt adapter on the tailhousing. How did that work out? is the 700r4 housing that much shorter than the 60e that there is room for that adapter or did you have to move the engine/trans forward to make the torque arm mount end up in the right place?
The tailshaft housing lines up perfectly with the adapter. The C-Beam had to be notched slightly.
Old 03-22-2010, 08:44 PM
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Originally Posted by pdsq98gt
What oil pan and mounts are you using? I want to do this same swap to an 86.
Missed this one...

Stock C6/GMPP crate pan.
Old 05-17-2010, 12:55 AM
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nice. ! dd? are you doing ac as well?
Old 05-22-2010, 11:35 AM
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Like the swap!!!

What mounts are you using?
Old 05-22-2010, 02:01 PM
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Great to see a C4 get some nasty power, Nice!


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