Bolt-on CTS-v w/ 175 shot vs Crew Cab Silverado 418ci w/ 94mm
08-14-2014, 11:16 AM
#1
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Bolt-on CTS-v w/ 175 shot vs Crew Cab Silverado 418ci w/ 94mm This is a great example of why not to run a stock PCM.
So I got this buddy Jeremy that guess by Heavychevy on the forums. He's got a pretty badass Silverado Crew Cab with a 418ish cube motor and a 94mm turbo on E85. So he's racing this CTS-V with a 150-175 shot. Here's the video. CTS-V gets the hit.
Looks like a nice clean pull. With the scramble and everything, that's about 1200 rwhp at like 4500 lbs. Well, what you can't see is that at about 1.5 secs into the run his fuel pressure went from 70 psi to 42-43 psi within the next .75 seconds (pink line). As this is happening, you can see the Holley spring into action with the closed loop correction (green dashes) and the injector duty cycle follow along with it (maroon line). He's not yet sure what happened but I suspect that the diaphragm in the boost reference fuel pressure regulator broke.
This is the 4th vehicle in our crew that has lived thru a 1000+ rwhp pump issue or failure in a multipump setup.
Have faith gentlemen. The **** works!
So I got this buddy Jeremy that guess by Heavychevy on the forums. He's got a pretty badass Silverado Crew Cab with a 418ish cube motor and a 94mm turbo on E85. So he's racing this CTS-V with a 150-175 shot. Here's the video. CTS-V gets the hit.
Looks like a nice clean pull. With the scramble and everything, that's about 1200 rwhp at like 4500 lbs. Well, what you can't see is that at about 1.5 secs into the run his fuel pressure went from 70 psi to 42-43 psi within the next .75 seconds (pink line). As this is happening, you can see the Holley spring into action with the closed loop correction (green dashes) and the injector duty cycle follow along with it (maroon line). He's not yet sure what happened but I suspect that the diaphragm in the boost reference fuel pressure regulator broke.
This is the 4th vehicle in our crew that has lived thru a 1000+ rwhp pump issue or failure in a multipump setup.
Have faith gentlemen. The **** works!
08-14-2014, 03:34 PM
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08-15-2014, 03:56 PM
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