09-23-2013, 01:25 AM | #1779 | |
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I can tell you that the stock port injectors are at about 90% duty cycle at around 215 hub HP. With a 70mm pulley and say 230hp they will be pretty much flat out. |
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09-23-2013, 02:56 AM | #1780 | |
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I've seen various tuners throw different numbers around regarding when the stock injectors and fuel pump should be replaced. I will concede that 250whp is the most common number that I have heard, and seems plenty reasonable. Perhaps some tuners are leaning on the DI injectors more then others. |
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09-23-2013, 03:36 AM | #1781 | |
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You can't 'lean on' the DI more than when it's already flat out (there's only so much time you can inject them during a cycle), which it is on 'my setup' where the port injectors are at 90% DC with load IRO 1.7g/rev @ 7k rpm. |
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09-23-2013, 04:07 AM | #1782 | |
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During my install they had to take it off the dyno and re bleed the intercooler, I spoke to sprintex about it and they are working on redesigning the system to be a lot easier to bleed in.
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09-23-2013, 04:30 AM | #1783 | |
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How are you measuring your charge temperatures? I must admit, I am susprised it's currently performing so poorly. I am open to there being a problem isolated to my particular install. It's taken a good amount of coolant (on or close to the recommended 2.2 litres). The pump makes the right noises when you squeeze the hoses etc. The water goes up and down in the overflow tank when you squeeze hoses. The car has done a few hundred miles since installation so I would expect most air pockets to have been dislodged by now! |
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09-23-2013, 05:05 AM | #1784 |
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Out of interest, anyone running an UEL exhaust manifold/header with this supercharger?
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09-23-2013, 05:20 AM | #1785 | |
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09-23-2013, 05:42 AM | #1786 | |
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Like i said its a problem with the hose design or something, i didnt get the nitty gritty but i will look at getting it tomorrow. The shop had to take an extra day with the install due to the bleeding process with the intercooler (this is the shop that helped develop the prototype kit as well). They told me there might still be more bubbles in the system to come out and since i picked up the car 4 days ago a lot of coolant has been taken from thetank into the system, enough to need topping up again. This was after they did the extended bleeding of it. Might be worth rebleeding the system and see how you go.
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The Following User Says Thank You to Khorne For This Useful Post: | ft_sjo (09-23-2013) |
09-23-2013, 06:10 AM | #1787 | |
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09-23-2013, 07:02 AM | #1788 |
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So your saying your direct injectors are at 100% duty cycle AND your port injectors are at 90% duty cycle?
Does your dyno read low? From what has been posted on this board previously, your power numbers should not be pegging the stock fuel system. There are people with Vortech kits putting out over 250whp on the stock injectors and pump. Hell, the Jackson racing crew are claiming 280whp on their stock kit with the stock fueling system. Now, not all dyno's are the same...which may be the case here. Regardless, fuel upgrades are never a bad thing.....unless they burn you car down :p. I'm more curious about your findings than anything else, so don't take my post as me trying to argue with you. Its interesting that if you ask 5 different tuners when you should upgrade the stock fueling system, you'll get 5 different answers. I think Robispec is sitting somewhere close to 285whp with nothing but a pump upgrade. |
09-23-2013, 07:28 AM | #1789 | |
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270-280hp may be possible (on some dynos). You can run the port injectors flat out, as in switched on hard. You can mess with the DI pressure to try and squeeze a bit more out of it. You can run it leaner. Etc. Lots of ways to change the ceiling. |
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09-23-2013, 07:35 AM | #1790 |
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09-23-2013, 08:54 AM | #1791 | |
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09-23-2013, 11:21 AM | #1792 |
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