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SVTPerformance's Chain of Restaurants
The Distillery
How far would 60lb injectors get me on E85?
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<blockquote data-quote="JeremyH" data-source="post: 15881392" data-attributes="member: 160292"><p>There in lies the potential problem regardless of power. Injectors are static in that last 90-100% range (order to pulse comes before previsouly pulse closes so injector is basicly staying open causing increased flow variance from loss of pulse timing control, ie varaince in tolerances of the spray tip nozzle and valve clearances) The real problem here is overall air/fuel ratio from all cylinders in the bank or together can look fine and safe, but your at the mercy of your 8 injectors static flow variance, a set of 8 injectors nominally has 5-6% static varaince from the manufacturer, can be more.</p><p></p><p>I see static highs and lows all the time on my flow bench when testing injectors. What it boils down to is some cylinders are running leaner and some are richer than others, you might be ok, you might be not, again not worth the risk imo. This happened to my buddies setup stroker setup, pushes more power on the injectors than should have been, afr looked good on the dyno and then couple smacks on the street with real load and he melted holes in 2 pistons.</p><p> </p><p>When I flowmatch sets of 8 I order 5-6 sets or more. I static flow test them and look for varaince and then split them out into groups that match within 1%. Then from those groups I do dynamic testing and run them though the rpm range 3 times and then record flow. From those static matched groups I then match up sets of 8 that are within 1% varaince for dynamic flow through the rpm range. When you buy a set of flowmatched injectors this is what your getting to ensure all cylinders are running the same through out the operation range. </p><p></p><p>Something to keep in mind as you push more power and push injectors. Good thing is most companies do his matching on their custom injectors now, but it does drive up price.</p><p></p><p>As far as pumps at your level its still easily handled in returnless so its your call. Most common upgrade is dropping 2 of the aftermarket ford gt sueprcar pumps in the hat. Those with your bap and wire upgrade is plenty of fuel on that blower.</p></blockquote><p></p>
[QUOTE="JeremyH, post: 15881392, member: 160292"] There in lies the potential problem regardless of power. Injectors are static in that last 90-100% range (order to pulse comes before previsouly pulse closes so injector is basicly staying open causing increased flow variance from loss of pulse timing control, ie varaince in tolerances of the spray tip nozzle and valve clearances) The real problem here is overall air/fuel ratio from all cylinders in the bank or together can look fine and safe, but your at the mercy of your 8 injectors static flow variance, a set of 8 injectors nominally has 5-6% static varaince from the manufacturer, can be more. I see static highs and lows all the time on my flow bench when testing injectors. What it boils down to is some cylinders are running leaner and some are richer than others, you might be ok, you might be not, again not worth the risk imo. This happened to my buddies setup stroker setup, pushes more power on the injectors than should have been, afr looked good on the dyno and then couple smacks on the street with real load and he melted holes in 2 pistons. When I flowmatch sets of 8 I order 5-6 sets or more. I static flow test them and look for varaince and then split them out into groups that match within 1%. Then from those groups I do dynamic testing and run them though the rpm range 3 times and then record flow. From those static matched groups I then match up sets of 8 that are within 1% varaince for dynamic flow through the rpm range. When you buy a set of flowmatched injectors this is what your getting to ensure all cylinders are running the same through out the operation range. Something to keep in mind as you push more power and push injectors. Good thing is most companies do his matching on their custom injectors now, but it does drive up price. As far as pumps at your level its still easily handled in returnless so its your call. Most common upgrade is dropping 2 of the aftermarket ford gt sueprcar pumps in the hat. Those with your bap and wire upgrade is plenty of fuel on that blower. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
How far would 60lb injectors get me on E85?
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