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SVTPerformance's Chain of Restaurants
The Distillery
Dual 465’s and E85
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<blockquote data-quote="JeremyH" data-source="post: 15856116" data-attributes="member: 160292"><p>Maxing injectors has a lot more factors than you would think ( type of power adder/bsfc, rpm range, fuel temperature, displacement, compression, ethanol percentage etc). One of the bigger factors often overlooked is boost level. If you running 20psi of boost to get 850rwhp you will have a lower duty cycle than if you have to run 30psi of boost to get the same 850rwhp as the injector has to work harder to deliver the right amount of fuel and over come boost in the manifold.</p><p></p><p>When picking out injectors, guys don't often account for going static or the fact that you can never really effectively operate the injector at max advertised flow. Most go static in the 91-93% duty cycle range. So for safety, its a good practice to shoot for 80% duty cycle range max when using a calculator to give you 10% overhead. So basicly you should calculate no more than 80-90% of the advertised flow rate tops right off the bat.</p><p></p><p>To add more data to the thread, I maxed 1000cc's on e85 at 800rwhp with a 3 bar base pressure (43psi) at 18lbs of boost on my personal car. Also seen 1300's max at 930rwhp on one setup, they were sold to upgrade and then made 1050rwhp on the next car at the same base pressure. In other words results vary, sometimes wildly.</p><p></p><p>Also something to keep in mind, the original 1300's actually actual flowed in the mid 1200cc range, where as the newer ones now called 1300X's flow in the mid to low 1300cc range.</p></blockquote><p></p>
[QUOTE="JeremyH, post: 15856116, member: 160292"] Maxing injectors has a lot more factors than you would think ( type of power adder/bsfc, rpm range, fuel temperature, displacement, compression, ethanol percentage etc). One of the bigger factors often overlooked is boost level. If you running 20psi of boost to get 850rwhp you will have a lower duty cycle than if you have to run 30psi of boost to get the same 850rwhp as the injector has to work harder to deliver the right amount of fuel and over come boost in the manifold. When picking out injectors, guys don't often account for going static or the fact that you can never really effectively operate the injector at max advertised flow. Most go static in the 91-93% duty cycle range. So for safety, its a good practice to shoot for 80% duty cycle range max when using a calculator to give you 10% overhead. So basicly you should calculate no more than 80-90% of the advertised flow rate tops right off the bat. To add more data to the thread, I maxed 1000cc's on e85 at 800rwhp with a 3 bar base pressure (43psi) at 18lbs of boost on my personal car. Also seen 1300's max at 930rwhp on one setup, they were sold to upgrade and then made 1050rwhp on the next car at the same base pressure. In other words results vary, sometimes wildly. Also something to keep in mind, the original 1300's actually actual flowed in the mid 1200cc range, where as the newer ones now called 1300X's flow in the mid to low 1300cc range. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
Dual 465’s and E85
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