Percision 5457RB Turbo Swap Complete!
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From: SOuth FLorida
When you rev above 6500 RPM or so the injectors no longer have enough time to inject the necessary amount of fuel in to keep the A/F ratio where it needs to be. The computer tells the injectors to spray for longer and so the injection cycle carries over into the compression stroke. That wets the heck out of the piston and causes the combustion flame propegation to go to hell. Basically the motor breaks up and runs like crap and power falls off badly no matter what you have in the way of mods.
Ohhhh Ahhhh, that explains it, seems like this dude isn't running into injection problems pushing 400+ whp, but thanks for explaining
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From: Florida
Senior Member
Joined: 07-25-08
Posts: 12,450
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From: Florida
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Joined: 07-25-08
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From: Florida
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From: Michigan
Yes, once, if, the GM stage kit comes out in will enable us to run up to 3 bar total pressure instead of 2.5 bar that will help power if you are running a bigger turbo, but it still does not solve the injector issue. Someone will need to find a way to modify the stock injectors so that they spray more fuel during the avaliable injection window. Once someone does that there will be the potential for 500+ whp LNFs.
Hello BIG numbers!
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From: columbus
He also dyno'd on a Dynapak that gives very high numbers.
My Stg2 w/ 2.8 and Intake and exhaust put down 263/238 on that dyno.
So his true numbers are probably closer to 370-385.
A friend of mine dyno'd his stock 2007 GT500 there and put down like 490hp.
My Stg2 w/ 2.8 and Intake and exhaust put down 263/238 on that dyno.
So his true numbers are probably closer to 370-385.
A friend of mine dyno'd his stock 2007 GT500 there and put down like 490hp.
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From: columbus
lets not compare numbers from dyno to dyno the car did just as much on a dynojet was well. thats not the point of this thread. anyway thanks for all the support and I will see you all at a local track.
I dyno'd on the same exact dyno. It gives high numbers. That is how my friend put down nearly 490whp on a 500hp car.
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