hey guys i know the LNF is direct injected and mainly the only fuel mods right now are the zzp 5th injector kit and cam with bigger fuel lobe. What i want to know is or correct me if i am wrong. IF WE get a bigger lpfp right and increase the pressure to the HPFP do we inturn force more fuel into the motor when the hpfp opens? or is it regulated anyway, i ask because the soltice has the same motor and there is a fuel pump avail for them but if we all can not get another hpfp i think my theroy may be right with increasing the pressure to the hpfp, but once again i am speculating please correct if i am wrong.

 

Once you start pumping more from the hpfp the lpfp will need to be upgraded as it wont keep up with the supply but simply inctrasing what the lpfp supplies will not increase what the hpfp puts out

 

Yes, you will need an upgraded in-tank fuel pump. There's a few pumps available, the aeromotive 340lph stealth is one. Walbro also makes a 400lph fuel pump. Both of these fit in the stock fuel pump housing. The 340lph will support up to 800hp.

 

^^^ okay i read on zzp website the aeromotive doesnt fit well and they do not warranty if something goes wrong i was looking at the perf autowerks intank fuel pump they make for the soltice it supports 700hp and it fits on our cars as well. they want $180 i believe, i just thought y consent of the fuel system was solid TY for clearing it up..

 

yes, but the problem lies with the HPFP/ Cam Lobe design and fuel injectors..

just so you know - the Aeromotive 340lph fuel is ONLY for 87-93RON gas [regular unleaded street gas], not to be used/mixed with any "E" blended fuels i.e: e47 or e85 or any other "Ethanol" blended fuels.. the pump wasn't designed to work with "Ethanol" fuels.. that's why Aeromotive or even ZZP isn't providing warranty claims if the 340lph pump was used with ANY Ethanol in the system/tank.. my claim last month with Aeromotive got denied, b/c I used the pump with e85.. lost $180 bucks down the drain..

so, when looking for a LPFP make sure the pump is either approved for regular Unleaded street gas or Ethanol Gas or a combination of both fuels..

 

Thats weird. I could have sworn I read somewhere that the stealths have an E85 warranty.

 

They will warranty your pump on e85 if its not due to filter clogging. Just read it directly off the site.

 

This is what you want for e85...

DW300 Fuel Pump Tech | DeatschWerks.com

 

think im goin to go with the perfautowerks 700hp supported fuel pump. soltice owners swear by it and seems to do them wonders.

 

I can't find much info on this pump. Like what its configuration is of inlet to outlet, what you have to do to make it work in our stock housing, etc. etc....I mean it looks like it will work but who knows until someone becomes the guinea pig...

 

I'm not bashing Aeromotive, but they should come out with a better filter from the start, or even label the pump in the box with the "required filter replacement procedure"..

not everybody is going to change the filter on the pump after every 10 hours of use.. i though the same thing about Aeromotive having a warranty on e85, but i was wrong.. what killing the pump when using e85, it is being clogged and it causes the pump to overheat and the overheating is whats killing the pump..

FAQ: 340-stealth-fuel-pumps

9.) Q: Can the 340 Stealth Pump be used safely in e85 and how much HP will it support?
A: E85 fuel has become a viable option for street performance enthusiasts in recent years. It has some very significant pros, and equally significant cons, to consider. It does provide higher octane, and lower charge air temperatures, and is especially popular in forced induction applications, permitting more aggressive combinations of boost, compression ratios and tuning. It is also less costly per-gallon than high-octane racing gasoline. That said, fuel usage increases 30-35% to support equal HP, somewhat offsetting the lower cost and requiring the HP rating of all fuel system components, including and especially the HP ratings of the fuel pump and fuel injectors, be reduced by 30-35%.

A crucial consideration regarding whether or not to run E85 is its tendency to rapidly and frequently contaminate and clog/block fuel filters, resulting in significant flow restrictions, which in turn may damage the engine and/or cause premature fuel pump failure. The reasons for filter contamination problems with E85 include:

E85 is an alcohol based fuel, and alcohols are hygroscopic (attract and absorb water from the atmosphere), which can accumulate in and clog fine filter elements.
E85 is an agriculturally produced fuel and, being a byproduct of plant material, there have been indications some of this “bio-mass” can accumulate in, and clog fuel filters.
E85 has very strong solvent properties, like many alcohol based liquids, which will act to strip accumulated debris and residues from transport and storage containers, and the inside of fuel tanks and fuel lines, which in turn accumulate in, and clog fuel filters.

Aeromotive has conducted extensive testing of the 340 Stealth Pump in E85 fuel, achieving 1,000 plus run hours of service life operating at 60 PSI and 13.5 Volts. In testing, it was found a filter service interval that gave good fuel pump service life required a new, down-stream filter be installed every 10 run-hours. It is vital to understand that a blocked filter creates severe flow restriction of pump output, building excessively high operating pressure between the pump and the contaminated element. If the Stealth 340 is allowed to run in this environment, operating pressures between pump and filter can exceed 90 PSI, creating extreme current draw and reduced cooling flow, resulting in rapid failure of the fuel pump motor assembly.


"WARNING: If you plan to run E85 fuel you must be prepared to install proper filtration, and maintain it as frequently as every 10 run-hours. If not, Aeromotive does NOT recommend you the use of E85 with the 340 Stealth Fuel Pump. Aeromotive’s new product warranty assures the purchaser their 340 Stealth Pump will be free from defects in material and workmanship for one year from the date of purchase. Fuel pump failure caused by clogged/blocked fuel filters is not the result of any defect in the pump itself, and is not covered under this warranty."

 

im still stuck between running E47 amd str8 E85 as of yet but i kno for sure for gas mileage purpose i will have 1 e47 tune, it would be wonders to have atleast a 5gallon fuel cell with 116 race gas but i have no clue how to run it so e47 and perf autowerks pump is fine my goal is 540whp daily driven.

 

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