ZZP s1 cams w/ big fuel lobe + PORT INJECTION = enough fuel for 80 lb/min?

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12-11-2013, 04:00 AM

#26

taintedred07

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My lnf is going to be for the street mostly and would like to stay on e85. I know most people can get away with cams, injectors, 5th injector, and upgraded lpfp for around 600whp. I just want a fuel system that will handle whatever I throw at it and I don't hear anybody using the stock manifold for port injection.

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12-11-2013, 06:12 AM

#27

SKY888

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Quote:

Originally Posted by Matt M

For max power on an LNF, it is typically best to start mixing in race gas rather than running E85 only. The reason is due to the injection window. With DI, you can make more power by running a shorter injection pulse even when the resulting afr is exactly the same. For example, if your IDC is 40%, even if you are not getting any misfires, you will make more power if you run larger injectors and get the IDC down to 35%. When we were going for max power on my car, the di injectors were at 40% and the 80lb 5th injector was maxed. I ran 3000psi fuel pressure at high rpms and kept lowering the ethanol percentage as I raised the boost. With C16 used to dilute the ethanol, we were down to ~55% ethanol and an overall octane of more than 110. This allowed the fuel system to supply enough to get the job done.

thanks for the info Matt.

since my car will no longer be daily driven (only weekend drive...and occassional track)..........I decided to go all C16 fuel on both tanks, instead of E85.

race tune: C16
street tune: 93 octane

this way, its easier maintenance for fuel system in the long run. And no issues starting the car on a cold day here in New England

Plus we only have one E85 station where I live (40 mins away without traffic)

I may not even reach the track (2.5 hours away) even with full tank of E85, lol.
With our 1 year old, my wife won't allow me storing any drums of fuel/alcohol in our attached garage, which I fully understand.

I talked to RC injectors, and asked if their injectors are E85 compatible, and they told me they are "compatible", but told me that it will be wise to drain the E85 every week, and flush it with regular pump gas.

Anyways, I won't be losing the cooling ability of E85............since I will still use my water/meth kit spraying pre-TB on my set-up (both tunes).

I just just buy c16 at the track, and drive to track and home with 93 octane.

With this set-up, it will not really be costly, and I have a peace of mind that I get consistent fuel.

Last edited by SKY888; 12-11-2013 at 06:31 AM.

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12-11-2013, 06:16 AM

#28

SKY888

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Quote:

Originally Posted by taintedred07

I don't hear anybody using the stock manifold for port injection.

zzp did stock manifold for port injection a year or so ago. I am not sure what controller they used.

BTF (solstice) did this 3 years ago.
greaseyjockey (solstice) also did this 3 years ago.
They both used microsquirt to control the fueling of their secondary fuel rail/port injectors

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