Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

Summit Racing LS3/C5 Time Attack Engine Build

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Old Apr 20, 2026 | 08:24 AM
  #61  
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The car made noise over the weekend!!

I was able to get the rest of the drivetrain in place last week, ran new fuel lines for the Summit intake, replaced the power steering cooler and all new AN lines for that, topped off the fluids and it fired right up late Saturday evening (my neighbors love me). It definitely needs a tune (obviously) as it wouldnt stay running without some throttle in put, but it sounds nasty, especially with open exhaust!

I need to finish the C6 axle back exhaust install, and tidy up some hoses/wiring before taking it to the dyno on Friday, but it looks like were going to meet my deadline. It went from a bare block and shell of a chassis to a running car in 3 weeks. Looking forward to getting out on track!




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Old Apr 25, 2026 | 07:41 AM
  #62  
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Yesterday I spent the afternoon at Back Street Performance watching them tune the Summit LS3 I spent the last couple weeks putting together. It was a bit of a challenge for the old C5 PCM, and I think we've pretty much maxed out its capabilities! But Erik is one of the best and got the big cam, short runner intake to perform!

Brian Nutter was also on site to watch his designs come to life inside my car! Our little 6.2L made 540hp, and 442ftlbs of torque at the wheels, and has power from 5000-7700rpm where the factory rev limit won't let us go any higher.

All that power went through a freshly rebuilt RPM Transmissions diff and the same trans from RPM that we have been running. It took a tremendous effort by everyone to get to this point, and I couldn't be happier with the outcome!

Time to get the Klotz break in oil out and fill with some 15w-50 race oil, tidy up some items in the engine bay, put body panels back on, and go play! Can't wait to see what we do with it on track this year!

https://youtu.be/FfII0DWLA-o?si=z97gV7NIrO93ILTc
https://youtu.be/kxEfocdMn4Y?si=GebSW7mEaPfQqO87










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Old Apr 25, 2026 | 07:51 AM
  #63  
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Originally Posted by Kubs
Yesterday I spent the afternoon at Back Street Performance watching them tune the Summit LS3 I spent the last couple weeks putting together. It was a bit of a challenge for the old C5 PCM, and I think we've pretty much maxed out its capabilities! But Erik is one of the best and got the big cam, short runner intake to perform!

Brian Nutter was also on site to watch his designs come to life inside my car! Our little 6.2L made 540hp, and 442ftlbs of torque at the wheels, and has power from 5000-7700rpm where the factory rev limit won't let us go any higher.

All that power went through a freshly rebuilt RPM Transmissions diff and the same trans from RPM that we have been running. It took a tremendous effort by everyone to get to this point, and I couldn't be happier with the outcome!

Time to get the Klotz break in oil out and fill with some 15w-50 race oil, tidy up some items in the engine bay, put body panels back on, and go play! Can't wait to see what we do with it on track this year!
Nice job dude! Glad to see it all come together and everything work right!
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Old Apr 26, 2026 | 08:22 PM
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That's the first dyno test with Summit Max Air intake I've seen. Good #'s👍
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