S/C 11.5psi Injector size, once and for all!
S/C 11.5psi Injector size, once and for all!
So I have asked like 10 different people about this and received about 8 different answers....
The setup:
supercharger @ 11.5psi
a/w intercooler = minimal loss lets say engine will see 11psi
aem fi/c
What size injectors do I need...... Also for some of those recommending very large 700cc injectors I am worried that I will have trouble with idle. All those with experience please post results. Anyone know what size Icenine was running when he did the 311whp?
The setup:
supercharger @ 11.5psi
a/w intercooler = minimal loss lets say engine will see 11psi
aem fi/c
What size injectors do I need...... Also for some of those recommending very large 700cc injectors I am worried that I will have trouble with idle. All those with experience please post results. Anyone know what size Icenine was running when he did the 311whp?
Originally Posted by paul_dezod
For 11 PSI on the S/C I would recommend 700cc. At this point, you are nearly identical to what Dan Gardner runs in his road race tC.
Originally Posted by draxcaliber
you need the bigger injectors because you need the extra fuel to help cool the engine while it evaporates depending on the efficiency of the a/w intercooler.
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From: Western NY
Originally Posted by gompka
Originally Posted by paul_dezod
For 11 PSI on the S/C I would recommend 700cc. At this point, you are nearly identical to what Dan Gardner runs in his road race tC.
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Originally Posted by gompka
Originally Posted by paul_dezod
For 11 PSI on the S/C I would recommend 700cc. At this point, you are nearly identical to what Dan Gardner runs in his road race tC.
Originally Posted by HEYitzMEEE
Originally Posted by gompka
Originally Posted by paul_dezod
For 11 PSI on the S/C I would recommend 700cc. At this point, you are nearly identical to what Dan Gardner runs in his road race tC.
Looks like 700cc is in the lead. I have no problems with getting the 700s but no one has commented on how the car runs with these while idle/not in boost thats the only thing i'm worried about at this point.
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From: Norcross
Originally Posted by gompka
Originally Posted by HEYitzMEEE
Originally Posted by gompka
Originally Posted by paul_dezod
For 11 PSI on the S/C I would recommend 700cc. At this point, you are nearly identical to what Dan Gardner runs in his road race tC.
Looks like 700cc is in the lead. I have no problems with getting the 700s but no one has commented on how the car runs with these while idle/not in boost thats the only thing i'm worried about at this point.
I had the same questions you did, but aside from the anecdotal 'can never go too big', 'go to xxxCC because this guy did', or '550 seems like the max' or 'just add fuel for cooling' was BS. I like to know the science of the application, just like you.
1. Check your actual injector duty cycles before guessing on the intertubes. We don't know if we're maxed until we test.
2. You are right, going huge when you don't need to is not efficient.
3. Fuel pump upgrade?
4. Have heard from several tuners (not internet tuners) that the 'cooling' effect from additional fuel is not as substantial as you think. I was told that it is a weak way to 'tune'. See #1.
5. Ok, so your first stop on this process, comparing other setups...forget the Supra..Let's just talk Turbo tC. You'll probably scratch your head wondering why the Greddy kit comes with 440cc injectors for mid-high 200whp setup. They seem to know what their doing right? So shouldn't that be the same for the s/c?
Not saying Greddy is perfect, and even here apples <> oranges. Here's why:
Always remember that the S/C needs belt driven power to make power. If you factor in even just 20% (that's a guess, don't believe me), then do the math. For a comparably equipped Turbo setup putting down 280 to the wheels, the S/C would have to be putting down MUCH more at the crank.
1. Check your actual injector duty cycles before guessing on the intertubes. We don't know if we're maxed until we test.
2. You are right, going huge when you don't need to is not efficient.
3. Fuel pump upgrade?
4. Have heard from several tuners (not internet tuners) that the 'cooling' effect from additional fuel is not as substantial as you think. I was told that it is a weak way to 'tune'. See #1.
5. Ok, so your first stop on this process, comparing other setups...forget the Supra..Let's just talk Turbo tC. You'll probably scratch your head wondering why the Greddy kit comes with 440cc injectors for mid-high 200whp setup. They seem to know what their doing right? So shouldn't that be the same for the s/c?
Not saying Greddy is perfect, and even here apples <> oranges. Here's why:
Always remember that the S/C needs belt driven power to make power. If you factor in even just 20% (that's a guess, don't believe me), then do the math. For a comparably equipped Turbo setup putting down 280 to the wheels, the S/C would have to be putting down MUCH more at the crank.
Originally Posted by jetlounge
I had the same questions you did, but aside from the anecdotal 'can never go too big', 'go to xxxCC because this guy did', or '550 seems like the max' or 'just add fuel for cooling' was BS. I like to know the science of the application, just like you.
1. Check your actual injector duty cycles before guessing on the intertubes. We don't know if we're maxed until we test.
2. You are right, going huge when you don't need to is not efficient.
3. Fuel pump upgrade?
4. Have heard from several tuners (not internet tuners) that the 'cooling' effect from additional fuel is not as substantial as you think. I was told that it is a weak way to 'tune'. See #1.
5. Ok, so your first stop on this process, comparing other setups...forget the Supra..Let's just talk Turbo tC. You'll probably scratch your head wondering why the Greddy kit comes with 440cc injectors for mid-high 200whp setup. They seem to know what their doing right? So shouldn't that be the same for the s/c?
Not saying Greddy is perfect, and even here apples <> oranges. Here's why:
Always remember that the S/C needs belt driven power to make power. If you factor in even just 20% (that's a guess, don't believe me), then do the math. For a comparably equipped Turbo setup putting down 280 to the wheels, the S/C would have to be putting down MUCH more at the crank.
1. Check your actual injector duty cycles before guessing on the intertubes. We don't know if we're maxed until we test.
2. You are right, going huge when you don't need to is not efficient.
3. Fuel pump upgrade?
4. Have heard from several tuners (not internet tuners) that the 'cooling' effect from additional fuel is not as substantial as you think. I was told that it is a weak way to 'tune'. See #1.
5. Ok, so your first stop on this process, comparing other setups...forget the Supra..Let's just talk Turbo tC. You'll probably scratch your head wondering why the Greddy kit comes with 440cc injectors for mid-high 200whp setup. They seem to know what their doing right? So shouldn't that be the same for the s/c?
Not saying Greddy is perfect, and even here apples <> oranges. Here's why:
Always remember that the S/C needs belt driven power to make power. If you factor in even just 20% (that's a guess, don't believe me), then do the math. For a comparably equipped Turbo setup putting down 280 to the wheels, the S/C would have to be putting down MUCH more at the crank.