05-23-2024, 12:50 AM | #1 |
Drives: Camaro ZL1 2018 Join Date: Apr 2020
Location: Ukraine
Posts: 18
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Injectors and HPFP variety
I am running stock bottom end LT4 with +38% fuel lobe cam together with Maggie 2650 on top. My pulleys are stock (90mm) upper and 15% lower. In addition to that I have all the supportive mods: 103mm TB, Rotofab Big Gulp CAI and DSX aux pump.
Currently, my car is tuned for 93 octane, but I would like to add some E (probably E50-60, not going to run full E85) to get some cooling and more power. As I understand, in order to do this I have 3 ways:
My goal is to keep the build as simple and clean as possible, so I lean towards the injectors plus HPFP combo. I do understand that in terms of budget it isn't the most wise and efficient choice, but I have to consider the installation complexity as well, since in my country we don't have so much experience and expertise with these engines. Taking all above mentioned into account I would like to ask you guys to educate me a bit regarding the injectors and HPFP variety. From what I currently see there are a few options for injectors and HPFP: Injectors
I've made some investigation and discovered that there are different variations of combos available, for example - FIC +30% with LPE Big Bore, XDI + 70% with LPE Big Bore etc. Which combo from the above list would be the best? What are your suggestions? Would any of the above-mentioned combos handle E50-60 for my build spec? |
05-24-2024, 08:00 AM | #2 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,953
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I would probably go with the +50 and LPE HPFP. If you do the +30, then they run out of headroom before the LPE HPFP, If you do the +65, the LPE HPFP runs out before the 65's. Hence why LPE probably offered 52% injectors with their pumps for years. I have tuned 3 cars with LPE HPFP and +65's with 38% cam lobes, and the HPFP starts to get unstable when the injectors still have plenty of room left. Thes are 950+whp cars running E60-70.
I would say with DI only fueling plan on E50-60 and don't worry about trying to run more. It's all you need anyway, just have to blend which isn't a big deal.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
05-24-2024, 08:22 AM | #3 | |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 5,125
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Quote:
Great info as always King.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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05-24-2024, 07:33 PM | #4 | |
Drives: 19’ ZL1 A10 / 16’ C7Z M7 Join Date: Apr 2021
Location: Fort Wayne, IN
Posts: 288
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05-24-2024, 09:34 PM | #5 | |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 5,125
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Quote:
__________________
2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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05-25-2024, 07:09 AM | #6 |
Drives: Camaro ZL1 2018 Join Date: Apr 2020
Location: Ukraine
Posts: 18
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Thank you for the valuable info, guys! Really appreciate it!
Just to clarify: +65% injectors are those offered by XDI, right? I currently see only +70% offered by XDI and Katech. I assume they are the same. Also, what is the approximate difference between E50, E60 and E70? I think that at some point (maybe E60) there isn't much difference in comparison with going full E? |
05-25-2024, 07:50 AM | #7 | |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 5,125
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Quote:
I’d guess guess it probably takes a good 10-15% more fueling capacity to run E85 instead of E50. E50 gets you virtually all of the benefits of E85 but less fuel system strain. Great if you can run full E though.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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05-25-2024, 08:46 AM | #8 | |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,953
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Quote:
I would say 15whp difference on most builds under 1000whp going from E50 to 80.
__________________
2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
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