[ZR1] 2009 vs 2012 ZR1? My 2012 is slow!
05-14-2012, 09:15 PM
#41
Melting Slicks
05-14-2012, 09:52 PM
#42
Le Mans Master
05-14-2012, 11:15 PM
#43
It is.
I bought my car in Seattle, drove it down the coast in January to LA and then up to Las Vegas. I stored the car in Las Vegas for 3 months till winter was gone here. Vegas is at 2000 feet and I could feel a difference.
I have the car now in my city at 2300
Sea level power is way more........ and we are still not in summer heat here yet.
So, basically 15-20hp per 1000 feet.
Hate to live in Denver.
Brian
I bought my car in Seattle, drove it down the coast in January to LA and then up to Las Vegas. I stored the car in Las Vegas for 3 months till winter was gone here. Vegas is at 2000 feet and I could feel a difference.
I have the car now in my city at 2300
Sea level power is way more........ and we are still not in summer heat here yet.
So, basically 15-20hp per 1000 feet.
Hate to live in Denver.
Brian
05-15-2012, 10:23 AM
#45
Melting Slicks
Hmmm, that is weird because that contradicts the information from this article.
The way the exerpt that you posted reads make me think that it is talking about the conditions that it will completely disable the boost by opening the bypass valve and droping the manifold pressure to 12 psi (82kpa) absolute pressure which is less than atmospheric. Because later, on the page they talk about limiting the boost to 145kpa (7psi) this make be think they are talking absolute pressure. I don't think that page is describing the true overboost fuction just what condition the ECM will disable or limit boost. I could be wrong though.
I also know that the min boost control value in the ECM is 172 kpa which would equate to 10.2 psi gage pressure of boost.
When manifold absolute pressure drops below about 82kpa (11.9 psi), this acutator opens the bypass and some intake air flows from the supercharger outlet, through the valve and back into the blower inlet
The same bypass valve is used to control boost at high engine speeds, but in that instance, pressure acting on the other side of the actuator opens the vavle. The pressure is controlled by a solenoid operated by the LS9's engine control module (ECM). When boost reaches 10.5 psi, the ECM energizes the solenoid and the actuator opens the valve, venting manifold pressure to the blower intake limiting boost
I also know that the min boost control value in the ECM is 172 kpa which would equate to 10.2 psi gage pressure of boost.
Last edited by racerns; 05-15-2012 at 10:54 AM.
05-15-2012, 03:48 PM
#46
Melting Slicks
I dont believe the 2012 dynos any less h.p than the others thats baloney.g.m would have been heavily criticized if that were true.Again bull... rumors started for no good reason!You dont even get 20 h.p net from headers on these cars how the hell can two cats eat up 20 h.p?Makes absolutely no sense.Shermonator or terminator thats B.s with a capital B.Cant believe that people owning these cars can be fed any kind of crap and believe it .
05-15-2012, 09:22 PM
#47
Le Mans Master
05-15-2012, 09:35 PM
#48
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