Something a bit differentL LS3 987
I wanted to share my race car that we are hoping will be finished and ready to (again) race this summer. It's powered by a 525HP LS3 Crate motor from GM racing. The car had mice/rodents eat the entire wiring (engine and chassis) harness and it was a great candidate to sell the stock motor an swap in something a bit more spicy.
Its been a bit of a haul and hope that the upgrades will be what it needed to be safe, reliable and fast on track. We did a big brake upgrade with AP racing brakes, a new OS Giken LSD and while we were at it we changed the cam for something bit more aggressive with more top end (short gears...so mote revs is nice). Here are some pics from the dyno. It made 516hp at the motor and 469whp. 459whp with the super quiet exhaust we need to run at LCMT.
What cam did you go with?
Mine is the 495hp hot cam, very nice in traffic but when you want to be gone…she is GONE
Please post more pics and videos! I will be getting mine back in mid June after a PPF color change and exterior restoration, hopefully will post a lot of pics soon!!
At this point I am hearing more of bore scoring issues, which is the fate mine met.
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The cam was a custom cam from Cam motion...I needed more rev's at the top and to move the powerband up a bit so that it wasn't quite as touchy at mid RPM at corner exit...it tends to want to slide (a lot). also due to the stock gearing, i run out of gear so now i can rev to 7100rpm which should help. I was at 6500rpm before. It was the "525 crate motor" when i bought it so it had a bit of a more hot cam than a stock ls3. The new cam seems to be good (at least on dyno..) and has a nice chop to it.
I was at Mosport but not in this car (in my RS) but hope to be there with it this summer. We built another one, a blue one that goes to Mosport often. That one has a LS7 and a sequential in it. Pretty wild.
I'll be running this car on track in June at LCMT for a Rennsport event and will report back and take some video.
Last edited by Chris R.; Jun 5, 2026 at 07:53 AM.
The cam was a custom cam from Cam motion...I needed more rev's at the top and to move the powerband up a bit so that it wasn't quite as touchy at mid RPM at corner exit...it tends to want to slide (a lot). also due to the stock gearing, i run out of gear so now i can rev to 7100rpm which should help. I was at 6500rpm before. It was the "525 crate motor" when i bought it so it had a bit of a more hot cam than a stock ls3. The new cam seems to be good (at least on dyno..) and has a nice chop to it.
I was at Mosport but not in this car (in my RS) but hope to be there with it this summer. We built another one, a blue one that goes to Mosport often. That one has a LS7 and a sequential in it. Pretty wild.
I'll be running this car on track in June at LCMT for a Rennsport event and will report back and take some video.




