08-11-2020, 11:20 PM | #1 |
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N55 Dorch Stage 2 Full E85?
Hey guys, I have read so many mixed answers on this one i'm confused.
Can a F32 N55 run full E85 with a dorch stage 2 HPFP with a stock lpfp? Thanks!
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08-12-2020, 01:24 AM | #3 |
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Correct should have asked the question better
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08-12-2020, 08:24 AM | #4 |
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I'm wondering the same. Still on the fence on the Dorsch or PI. Multiple scenarios including full e85 as you mentioned. For me 650hp, I want to run at least e50 but I don't want to run on the edge of the HPFP capability either.
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08-12-2020, 11:39 AM | #5 | |
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He ran over 600whp with E40-E50 but he did have meth on top i believe. According to dorsch website, they say 500whp on full E85. I think that's a safe/conservative estimate to leave you with a little more headroom on the HPFP so you dont get crashes if its cold outside or something. I am not aware of anyone here who has pushed over that with a dorsch stage 2 on full E85 so if you dead set on 600+ with full E85 you might be the one to test the limits. I also think that going to 600+ on full E85 might be at/beyond the limit of the LPFP as well. Personally I think that if you want to go full E85, getting the stage 2 HPFP, keeping stock LPFP, and getting a nice safe tune for low 500s whp is the way to go... put less stress on everything, not worry about being at the limit of hardware, and keep engine/trans alive for a long time. Just my opinion though, your car and $$$ |
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08-13-2020, 05:30 AM | #6 |
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i have a dorch stage 2.. you can not run full e85 withouth the lpfp becoming a problem.
e70ish, yeah sure.
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08-13-2020, 11:04 AM | #7 |
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08-13-2020, 12:30 PM | #8 |
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Now I am lost, so if you run full E85 and make 475-500WHP will the LPFP cause issues or only bottleneck if you push further?
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08-13-2020, 12:37 PM | #9 | |
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I dont suppose anyone knows the lph rating of the OEM LPFP? |
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08-13-2020, 01:03 PM | #10 |
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no idea.. im at like 20.1 psi
if i dont back off the ethanol to around e70 i will get a fuel pressure crash.. thats after multiple revisions and talking to dorch. seems the lpfp wont support a maxed maxed out system.
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08-13-2020, 01:45 PM | #11 | |
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Do you have any datalogs of trying to run E85 or successfully running E70? It's too bad we dont have a LPFP pressure sensor. |
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08-13-2020, 02:24 PM | #12 | ||
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anything about 6k and thenboost drops hards. like 14 to 15psi.. oem turbo cant keep up. thats with no leaks and a turbosmart diverter. im shifting at 6k to 6200ish tops
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08-13-2020, 06:59 PM | #13 | |
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08-13-2020, 07:20 PM | #14 | ||
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best i did on e30 was 12.08 or .04 or something
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08-14-2020, 03:15 AM | #15 |
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Well I don't mind getting a new LPFP. My worries are I heard stage 2 LPFPs causing issues with stock ekp module, to be specific they are fuel-it.. would a spool stage 2 still have this issue? or would just be going stage 3 with a hobbs switch be the best option?
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08-14-2020, 09:36 AM | #16 |
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Generally yeah that tends to be an issue with upgraded LPFP. There is an upgraded EKP available. Forgot the company, but its $500-600 IIRC.
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08-14-2020, 01:50 PM | #17 |
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will all stage 2 pumps have this issue? I'd rather buy the stage 3 than buy a new EKP..what are the chances a stage 3 pump could fail with a hobbs?
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08-14-2020, 01:51 PM | #18 |
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Wait what? Are you saying you want to get an even bigger LPFP? The issue is basically with the amount of power the LPFP can draw and overheating the EKP.
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08-14-2020, 01:59 PM | #19 | |
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Stage 3 LPFP(fuel it) from my understanding is a OEM LPFP rebuilt to be fully e85 compatiable with a secondary pump so it takes no additional draw on the EKP unless above 15psi, The secondary pump activates with a hobbs switch at about 15psi. So secondary pump will only be active in WOT I assume. I think that will solve the EKP issue but I am just curious to know if that would be a viable long term solution?
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08-14-2020, 02:31 PM | #20 | |
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