#1  
Old 12-23-2021, 02:53 PM
PDC PDC is offline
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Default 73LS9TA Updates

Kong Bricks, Divider, Deflectors and Intercooler Inlets installed. Intercooler routing addressed and ZR1 IC pump up and running:
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  #2  
Old 12-23-2021, 02:55 PM
PDC PDC is offline
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Default More…

Lingenfelter Pulley and Snout installed. New air intake fabbed and back from powder coat:
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Old 12-23-2021, 02:59 PM
PDC PDC is offline
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Default Fuel Delivery

During the initial ‘post’ upgrade pull, the injectors maxed out and she ran out of fuel at 4700 RPMs. Fuel pump is good - but we found that the regulator can’t keep up when the boost starts to climb. Swapping in 1:1 Boost Referenced Regulator which ‘should’ keep the LS9 fed and happy!

  #4  
Old 12-25-2021, 12:44 AM
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David Holmberg David Holmberg is offline
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Should be a lot of fun when finished.

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Old 12-25-2021, 10:59 AM
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Scarebird Scarebird is offline
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My LS3 powered T/A is a hoot to drive - this should be a beast!

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  #6  
Old 01-06-2022, 07:54 PM
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Default TB Error Code (!)

Never a dull moment. New fuel regulator and step up larger injectors solved the lean condition at higher RPMs, but then discovered that she turns herself off after any WOT pull. Not during the pull, just when you release the throttle. We’ve tracked this down do an uncommon but well documented TB error code issue. Most commonly seen with the TBs in the GMPP crate engines - rarely seen in a factory C6ZR1. So, new TB is on the way. We are cautiously optimistic this will have her happy. Then I can wake up, flip the garage lights on, and not see that lonely, empty bay any more!!!

Will post final dyno #s with LPE pulley and snout as soon as I have them.

  #7  
Old 01-11-2022, 07:05 PM
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Default Success!

Finally got the clean bill of health from House of Boost today! In going over the engine with a fine tooth comb, they found several ‘little’ issues that could have easily become ‘big’ issues. One by one, they identified and corrected everything and had a lengthy dyno session this afternoon. Car performed flawlessly over the course of a half a dozen back to back pulls. Cooling system kept up, fuel delivery kept up, and no more mystery shut down after WOT. Car made 560 hp at the tires, which ‘estimates’ to 660 at the crank with a 15% driveline drag figure for the manual trans. These guys said the 9” Ford in the DSE Q-Link always soaks up a bit more power than the smaller, lighter independent rear in the comparable C6 ZR1 Vettes, so she may be closer to 675 at the crank. That makes sense - stock is 638 at the crank and I have a 3” catless exhaust with turn downs at the axle as opposed to tail pipes. I’m sure there were 25 or so extra ponies in the exhaust and cleaning up the tune a bit. I should get the car back tomorrow and if they post videos of the dyno pulls, I will post a couple of links.

  #8  
Old 01-12-2022, 12:49 PM
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napster napster is offline
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Quote:
Originally Posted by PDC View Post
Finally got the clean bill of health from House of Boost today! In going over the engine with a fine tooth comb, they found several ‘little’ issues that could have easily become ‘big’ issues. One by one, they identified and corrected everything and had a lengthy dyno session this afternoon. Car performed flawlessly over the course of a half a dozen back to back pulls. Cooling system kept up, fuel delivery kept up, and no more mystery shut down after WOT. Car made 560 hp at the tires, which ‘estimates’ to 660 at the crank with a 15% driveline drag figure for the manual trans. These guys said the 9” Ford in the DSE Q-Link always soaks up a bit more power than the smaller, lighter independent rear in the comparable C6 ZR1 Vettes, so she may be closer to 675 at the crank. That makes sense - stock is 638 at the crank and I have a 3” catless exhaust with turn downs at the axle as opposed to tail pipes. I’m sure there were 25 or so extra ponies in the exhaust and cleaning up the tune a bit. I should get the car back tomorrow and if they post videos of the dyno pulls, I will post a couple of links.
PDC,
Sounds great!! Good to hear the issues are sorted out. Enjoy that car, I know I would.

Jim

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