anyone running ATI @ 9lbs with stock injectors?
Its not going to be safe what so ever. Just finished my install today and we starting to tune and my stock injectors are at 100% maxed cap. You will be running way lean up high above 5k.
You will be going BOOOM!
spend the $500 or so and get some injectors or you will be forking out $4k for a new motor.
Are you running the out of the box setup ATI sent you?
You will be going BOOOM!
spend the $500 or so and get some injectors or you will be forking out $4k for a new motor.
Are you running the out of the box setup ATI sent you?
I've been told the stock injectors are 370cc. You don't want to run an injector above 80% duty cycle as a rule of thumb.
370cc X .8= 296cc should be able to handle 296 WHP
If I go FI next year, I'll use 550cc.
550cc X .8 = 440cc (WHP)
370cc X .8= 296cc should be able to handle 296 WHP
If I go FI next year, I'll use 550cc.
550cc X .8 = 440cc (WHP)
The stock injectors are indeed only 290cc. If you plan on boosting 9 or more you are better off going with at the least 440cc. 550cc is you are really going to build your motor.
Just look at it this way...If you dont pay for it now you will pay more for it later.
Just look at it this way...If you dont pay for it now you will pay more for it later.
Joined: Dec 2004
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From: greensboro, nc
thanks for the info, i'm satying at 7lbs for now, but was just curious...
ati "stock setup" i'm getting about 5.2lbs of boost, with j&s safeguard
ati "stock setup" i'm getting about 5.2lbs of boost, with j&s safeguard
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I just had the ATI installed [with major troubles] I have RC 380cc injectors and they were 'maxed out' at 330-340rwhp. They were nearing the 80% duty cycle as mentioned earlier. I believe the shop might have even upped them for me to 440cc. I would also get a fuel pump [Walbro 255]. The ATI is definately a touchy setup... It seems to me if you are just starting out and not wanting to be too crazy stick with the FMU that comes with the kit and add something to control the timing. The eManage Ultimate was such a major major headache.... Good luck with it.......
So far Im more than happy with the Greddy Eman Ult. The car is not fully tuned yet due to the fact that we reached almost 100% cycle on the stock injectors. Im not running the aerometer inline pump I went with the Walbro 255.
I should have my 440cc by next week then Ill update you on the tuning with the Emanage. Who tuned your setup?
I should have my 440cc by next week then Ill update you on the tuning with the Emanage. Who tuned your setup?
Originally Posted by Dan_K
What about Vortech Setups? Do those people have to upgrade their injector's as well? Because I don't remember anyone stating you have to change the injectors when they are putting out 350+whp.
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I've got an ATI and last year I upgraded to a full AA return fuel system, eManage and 440 injectors while running 7 lbs of boost. I am currently waiting on my new Aries 9.5:1 pistons and Eagle rods at which point I will also increase the boost to 10 lbs. I'll let you know how it works out, but I doubt I'll have any info for at least 3 weeks.
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From: Ontario
This time with my proper screen name.....
I've got an ATI and last year I upgraded to a full AA return fuel system, eManage and 440 injectors while running 7 lbs of boost. I am currently waiting on my new Aries 9.5:1 pistons and Eagle rods at which point I will also increase the boost to 10 lbs. I'll let you know how it works out, but I doubt I'll have any info for at least 3 weeks.
I've got an ATI and last year I upgraded to a full AA return fuel system, eManage and 440 injectors while running 7 lbs of boost. I am currently waiting on my new Aries 9.5:1 pistons and Eagle rods at which point I will also increase the boost to 10 lbs. I'll let you know how it works out, but I doubt I'll have any info for at least 3 weeks.
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Originally Posted by PimpCoupe
This time with my proper screen name.....
I've got an ATI and last year I upgraded to a full AA return fuel system, eManage and 440 injectors while running 7 lbs of boost. I am currently waiting on my new Aries 9.5:1 pistons and Eagle rods at which point I will also increase the boost to 10 lbs. I'll let you know how it works out, but I doubt I'll have any info for at least 3 weeks.
I've got an ATI and last year I upgraded to a full AA return fuel system, eManage and 440 injectors while running 7 lbs of boost. I am currently waiting on my new Aries 9.5:1 pistons and Eagle rods at which point I will also increase the boost to 10 lbs. I'll let you know how it works out, but I doubt I'll have any info for at least 3 weeks.