950cc enough? e85

[thisdsm]

Are 950's enough for e85? Mods are in my profile. I want reassurance before I drop it off at RRE for a complete dyno tune. Thanks in advance.

 

[hubz91talontsi]

Depends on your horsepower goals.. 450s are enough for e85 if youre only making 150hp

 

[viperlp01]

Its hard to say until the dyno starts running but I was MAXXING out my 850s on E85 and about 25psi on an HX35(around 47ish lb/min). These questions are too hard to ask but I have been seeing some great deal on injectors recently. 300 bucks for 1450s is really hard to beat.

 

[thisdsm]

That was a fast reply! My goals are to pretty much go as far as my fuel pump can take me. Once that becomes an obstacle then that's it. Which I believe the 255 max's out at around 550????

Its hard to say until the dyno starts running but I was MAXXING out my 850s on E85 and about 25psi on an HX35(around 47ish lb/min). These questions are too hard to ask but I have been seeing some great deal on injectors recently. 300 bucks for 1450s is really hard to beat.

Yes that is why I wanted to make sure Im not at 100% idc with the 950's I have now. Prices are really cheap for bigger injectors, so if my 950's aren't enough I'd like to go bigger now, than later.

 

[TurboAnything]

From the ECMlink knowledge base.
E85 Air Flow Support Chart:

This chart outlines the approximate max airflow which can be supported for a given duty cycle and injector flow rate on E85. 43.5psi base fuel pressure is assumed.

Injector Size 100% IDC(lbs/min) 80% IDC (lbs/min) Global (E85)
390cc 21.80 lbs/min 17.44 lbs/min Not a good idea
450cc 25.15 lbs/min 20.12 lbs/min Not a good idea
550cc 30.74 lbs/min 24.59 lbs/min Not a good idea
580cc 32.42 lbs/min 25.94 lbs/min Not a good idea
650cc 36.33 lbs/min 29.07 lbs/min Not a good idea
660cc 36.89 lbs/min 29.51 lbs/min Not a good idea
680cc 38.01 lbs/min 30.41 lbs/min Not a good idea
720cc 40.24 lbs/min 32.20 lbs/min -6.9%
750cc 41.92 lbs/min 33.54 lbs/min -10.6%
780cc 43.60 lbs/min 34.88 lbs/min -10.4%
850cc 47.51 lbs/min 38.01 lbs/min -21.1%
880cc 49.19 lbs/min 39.35 lbs/min -20.2%
950cc 53.10 lbs/min 42.48 lbs/min -29.4%
1000cc 55.89 lbs/min 44.72 lbs/min -33.0%
1150cc 64.28 lbs/min 51.42 lbs/min -41.7%
1200cc 67.07 lbs/min 53.66 lbs/min -44.1%
1600cc 89.43 lbs/min 71.55 lbs/min -58.1%
1850cc 103.41 lbs/min 82.72 lbs/min -63.8%

 

[wkmitsu]

For E85 you need injectors 30% larger than you would for normal fuel. So figure out what size injector you would need without E85 and do this:

Ex.

Say you would need a 650 cc injector not using E85.

650 * 0.3 = 195

650 + 195 = 845

So you would go with at least an 850 cc injector in this case.

 

[thisdsm]

From the ECMlink knowledge base.
E85 Air Flow Support Chart:

This chart outlines the approximate max airflow which can be supported for a given duty cycle and injector flow rate on E85. 43.5psi base fuel pressure is assumed.

Injector Size 100% IDC(lbs/min) 80% IDC (lbs/min) Global (E85)
390cc 21.80 lbs/min 17.44 lbs/min Not a good idea
450cc 25.15 lbs/min 20.12 lbs/min Not a good idea
550cc 30.74 lbs/min 24.59 lbs/min Not a good idea
580cc 32.42 lbs/min 25.94 lbs/min Not a good idea
650cc 36.33 lbs/min 29.07 lbs/min Not a good idea
660cc 36.89 lbs/min 29.51 lbs/min Not a good idea
680cc 38.01 lbs/min 30.41 lbs/min Not a good idea
720cc 40.24 lbs/min 32.20 lbs/min -6.9%
750cc 41.92 lbs/min 33.54 lbs/min -10.6%
780cc 43.60 lbs/min 34.88 lbs/min -10.4%
850cc 47.51 lbs/min 38.01 lbs/min -21.1%
880cc 49.19 lbs/min 39.35 lbs/min -20.2%
950cc 53.10 lbs/min 42.48 lbs/min -29.4%
1000cc 55.89 lbs/min 44.72 lbs/min -33.0%
1150cc 64.28 lbs/min 51.42 lbs/min -41.7%
1200cc 67.07 lbs/min 53.66 lbs/min -44.1%
1600cc 89.43 lbs/min 71.55 lbs/min -58.1%
1850cc 103.41 lbs/min 82.72 lbs/min -63.8%

Thanks!