injector size for e85
12-06-2014, 07:21 AM
#1
Staging Lane
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injector size for e85 I have stock lq4, turbo cam, and bws475. Considering using e85. Fuel injector calculator say that 850 flywheel hp need 80lb injectors, which is at 90%. 80's are a lot less than 96's. Don't think I will exceed 850 hp(crankshaft) with stock bottom end. Anyone with any experience with this?
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64c20 (02-02-2023)
12-06-2014, 02:29 PM
#5
Check out Deatschwerks injectors. They come with all GM data for tuning and are a high quality injector that is very competitively priced. I run there 90lb LS3 injector on E85 with great success!
12-06-2014, 02:55 PM
#7
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12-06-2014, 06:03 PM
#9
Interesting
I'm running ID1000's at 56 base. Approx 110lb/hr at this pressure.
IDC is right at 102% per the HPT data logs.
I am running rich at 11.1:1 AFR.
Boost is 15 psi.
Holley 1800 pump and reg.
3400lb car at 145+ mph, whatever that works out for hp.
I am not so sure the holley pump is up to the task of 1100 hp on E85 unless larger injectors are used. Much less 80 pounders.
I did test the pump and reg for pressure vs boost thru 82 psi. The system maintained 1:1 rise.
No clue on flow at that pump pressure.
Ron
I'm running ID1000's at 56 base. Approx 110lb/hr at this pressure.
IDC is right at 102% per the HPT data logs.
I am running rich at 11.1:1 AFR.
Boost is 15 psi.
Holley 1800 pump and reg.
3400lb car at 145+ mph, whatever that works out for hp.
I am not so sure the holley pump is up to the task of 1100 hp on E85 unless larger injectors are used. Much less 80 pounders.
I did test the pump and reg for pressure vs boost thru 82 psi. The system maintained 1:1 rise.
No clue on flow at that pump pressure.
Ron
12-07-2014, 05:21 AM
#12
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I could purchase a set of 80#ers or found a set of 95#ers Delphi's which are low impedence. (similar prices). Planning on wiring up a microsquirt harness, so, could I just use resistors and go with the 95#ers? Only knowledge I have of these resistors is from the megamanual. Has anyone used these with success?
12-08-2014, 12:55 PM
#15
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Interesting
I'm running ID1000's at 56 base. Approx 110lb/hr at this pressure.
IDC is right at 102% per the HPT data logs.
I am running rich at 11.1:1 AFR.
Boost is 15 psi.
Holley 1800 pump and reg.
3400lb car at 145+ mph, whatever that works out for hp.
I am not so sure the holley pump is up to the task of 1100 hp on E85 unless larger injectors are used. Much less 80 pounders.
I did test the pump and reg for pressure vs boost thru 82 psi. The system maintained 1:1 rise.
No clue on flow at that pump pressure.
Ron
I'm running ID1000's at 56 base. Approx 110lb/hr at this pressure.
IDC is right at 102% per the HPT data logs.
I am running rich at 11.1:1 AFR.
Boost is 15 psi.
Holley 1800 pump and reg.
3400lb car at 145+ mph, whatever that works out for hp.
I am not so sure the holley pump is up to the task of 1100 hp on E85 unless larger injectors are used. Much less 80 pounders.
I did test the pump and reg for pressure vs boost thru 82 psi. The system maintained 1:1 rise.
No clue on flow at that pump pressure.
Ron
12-08-2014, 01:21 PM
#16
If you don't spend the money on larger injectors, you'll have to spend the money on more fuel pump. You have to add boost pressure to your base pressure. To take 80's to 850+ on E85 you'll need 90ish psi of total fuel pressure. From what I've seen the Holley 1800 won't even operate at those pressures.
3 inline 255HP walbros or 2 intank 450 walbros would be the cheapest options.
3 inline 255HP walbros or 2 intank 450 walbros would be the cheapest options.
12-08-2014, 08:27 PM
#17
Me and a buddy of mine were talking about this today because I am REALLY out of injector (Well, and pump too) on my car, but honestly cannot afford to throw someone $1000 for a premium set of injectors. Right now I am on twin 255's, e85, and 80# siemens, 56psi base pressure with 1:1 rise. My car is pushing an ungodly amount of IDC (130%), and obviously leaning out past that point. I know I am at the end of my pumps too, however, with monitoring fuel pressure during WOT, the pressure does not drop off yet.
Long story short though, I am looking to do Walbro 450's and crank up the base pressure until I am back in the low to mid 90's IDC. I wonder what the mechanical "limit" of the 80# injectors are pressure wise before they start have problems operating. Anyone know which member it was that cranked up his base pressure and was at 850whp on e85 and 80# injectors?
Long story short though, I am looking to do Walbro 450's and crank up the base pressure until I am back in the low to mid 90's IDC. I wonder what the mechanical "limit" of the 80# injectors are pressure wise before they start have problems operating. Anyone know which member it was that cranked up his base pressure and was at 850whp on e85 and 80# injectors?
12-08-2014, 08:52 PM
#18
Me and a buddy of mine were talking about this today because I am REALLY out of injector (Well, and pump too) on my car, but honestly cannot afford to throw someone $1000 for a premium set of injectors. Right now I am on twin 255's, e85, and 80# siemens, 56psi base pressure with 1:1 rise. My car is pushing an ungodly amount of IDC (130%), and obviously leaning out past that point. I know I am at the end of my pumps too, however, with monitoring fuel pressure during WOT, the pressure does not drop off yet.
Long story short though, I am looking to do Walbro 450's and crank up the base pressure until I am back in the low to mid 90's IDC. I wonder what the mechanical "limit" of the 80# injectors are pressure wise before they start have problems operating. Anyone know which member it was that cranked up his base pressure and was at 850whp on e85 and 80# injectors?
Long story short though, I am looking to do Walbro 450's and crank up the base pressure until I am back in the low to mid 90's IDC. I wonder what the mechanical "limit" of the 80# injectors are pressure wise before they start have problems operating. Anyone know which member it was that cranked up his base pressure and was at 850whp on e85 and 80# injectors?