Jump to content
SAU Community

Recommended Posts

Injectors are reaching their limit for E85, I upgraded my fuel pump tihs week from a walbro 255 to 400 to handle the E85. More of a bandaid till i have the $$ for a full external setup.

255 fuel pump was maxing out with the car makeing 405hp and a mix of 70% pump98 and 30% E85. to get the full benefits of e85 it needed changing

With the Haltech sensor i can now run any blend of pump to E85 i like and the tune will change accordingly.

Yep that is fair enough man! I went through all the same stuff.... Went from a 34GTR pump to 1x044 internal but maxed it out at 350kw and now have 2x044 external and a lift pump etc... They are staged through the Haltech so that both pumps arent working flat out all the time, it is a VERY impressive setup made by JEM.

And yep, i run the Haltech/Zeitronix flex fuel setup too! You will love it.

Hopefully i will! Worst part for me is E85 isnt readily available around me. Ive bought a 200L Barrel of sucrogen E85 and thats what the car was tuned on. Fuel Economy is what I'm interested in. how long does a tank last you? as in a day out at powercruise/powerplay?

Im also interested to see what gains i would get from high mounting it and externally gating it.

Edited by SCR48

Hopefully i will! Worst part for me is E85 isnt readily available around me. Ive bought a 200L Barrel of surgeon E85 and thats what the car was tuned on. Fuel Economy is what I'm interested in. how long does a tank last you? as in a day out at powercruise/powerplay?

Im also interested to see what gains i would get from high mounting it and externally gating it.

Mine isnt a good indication as we have had some injector issues causing all sorts of drama's, it is NOW finally sorted and was meant to be on the dyno yesterday but am still waiting.

I have got around 400km off a tank on light cruise on E70 BUT i have also got 220km off a tank in full thrash mode so mine isnt the best indication as yet! I should be able to give you a firm answer in a couple of weeks tho :)

I would imagine if you maintain the 24psi you would get nearly the same result as me IF you have similar cams or around 345kw without cams..... That is what i have seen in my experiance anyway :)

In terms of Powerplay etc you should go through the whole day with no issue on E85 as you arent holding full boost for long periods

hey man if you have problems with the 400 intank i would go twin 255 intanks i had a 400 in mine making same power on only 18psi, the 400 shit it self and we found going the twin 255 pumps there is alot less current draw on the pump wiring the wiring was getting very hot, i also put a relay to the pumps

Injectors are reaching their limit for E85, I upgraded my fuel pump tihs week from a walbro 255 to 400 to handle the E85. More of a bandaid till i have the $$ for a full external setup.

255 fuel pump was maxing out with the car makeing 405hp and a mix of 70% pump98 and 30% E85. to get the full benefits of e85 it needed changing

With the Haltech sensor i can now run any blend of pump to E85 i like and the tune will change accordingly.

Very surprised by overall gains


fwiw nismo intank can flow enough for most unopened 25 applications

What sort of flow do they have? I've seen them on some decent power cars but never knew what they were really capable of?

My fuel system is old school pumps but an epic setup!

I believe they are rated to about 275 LPH but actually reach those claims at real world voltages and boost pressures, unlike the walbro that does it at higher voltage without boost pressure. At least that's what my mechanic at the time explained it as. I've had a walbro on my old car's rb25 setup, and on this car, and I now have a Tomei one, and the Tomei one far outflowed the walbro on the like-for-like setup.

My tuner tested my current one in front of me by pulling off the fuel rail feed and letting the pump feed the fuel into a measuring cup for 30 seconds to extrapolate the flow it could produce for my current e85 setup (since it needs more volume) and it was sufficient for the power aims I'm going for.

But I reckon if I was shooting 350+ like yours Mat, I'd need a massive jump in fuel system setup. Kind of like reaching the limit of stock turbo power and having massive expenditure to go to the next level. But I'm yet to see another single swimmer pump outperform it as a drop in for stock.

I believe they are rated to about 275 LPH but actually reach those claims at real world voltages and boost pressures, unlike the walbro that does it at higher voltage without boost pressure. At least that's what my mechanic at the time explained it as. I've had a walbro on my old car's rb25 setup, and on this car, and I now have a Tomei one, and the Tomei one far outflowed the walbro on the like-for-like setup.

My tuner tested my current one in front of me by pulling off the fuel rail feed and letting the pump feed the fuel into a measuring cup for 30 seconds to extrapolate the flow it could produce for my current e85 setup (since it needs more volume) and it was sufficient for the power aims I'm going for.

But I reckon if I was shooting 350+ like yours Mat, I'd need a massive jump in fuel system setup. Kind of like reaching the limit of stock turbo power and having massive expenditure to go to the next level. But I'm yet to see another single swimmer pump outperform it as a drop in for stock.

I had the option to stay at the power level and keep the fuel system as the limiting factor BUT i needed head room incase of issues etc..... Mainly for safety SO i took the leap and went all out with the system as i knew this car would be with me for as long as i can physically drive it ;)

It was dissapointing to find once it was done the turbo was out of puff and i gained 5kw :P lolz.... But with all things, that will be temporary for sure! The car hasnt managed to stay in one configuration for long and i dont see this setup staying for too long either, i DO however know its nearly perfect so any change will be minor :yes:

nismo overengineer / under rate their equipment...

my car made 325rwkw on e85 with nismo 555cc injectors @ 92%

as far as i'm aware no one else has come close with 555's

Hahaha bet you were loving the smell and power ;)

With only one or two ppl in the car it awesome, hoever had to drive up the coast with 4 ppl and a heap of shit in the boot so it was weighed down a lot and the motor really had to work..

nismo overengineer / under rate their equipment...

my car made 325rwkw on e85 with nismo 555cc injectors @ 92%

as far as i'm aware no one else has come close with 555's

Wow that's interesting, were yours definitely yellow top Nismos? I can't help but think mine would have struggled to do that.

Wow that's interesting, were yours definitely yellow top Nismos? I can't help but think mine would have struggled to do that.

genuine nismo 555cc bought from nengun in 2007/8

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • As far as I can tell I have everything properly set in the Haltech software for engine size, injector data, all sensors seem to be reporting proper numbers.  If I change any injector details it doesnt run right.    Changing the base map is having the biggest change in response, im not sure how people are saying it doesnt really matter.  I'm guessing under normal conditions the ECU is able to self adjust and keep everything smooth.   Right now my best performance is happening by lowering the base map just enough to where the ECU us doing short term cut of about 45% to reach the target Lambda of 14.7.  That way when I start putting load on it still has high enough fuel map to not be so lean.  After 2500 rpm I raised the base map to what would be really rich at no load, but still helps with the lean spots on load.  I figure I don't have much reason to be above 2500rpm with no load.  When watching other videos it seems their target is reached much faster than mine.  Mine takes forever to adjust and reach the target. My next few days will be spent making sure timing is good, it was running fine before doing the ECU and DBW swap, but want to verify.  I'll also probably swap in the new injectors I bought as well as a walbro 255 pump.  
    • It would be different if the sealant hadn't started to peel up with gaps in the glue about ~6cm and bigger in some areas. I would much prefer not having to do the work take them off the car . However, the filler the owner put in the roof rack mount cavities has shrunk and begun to crack on the rail delete panels. I cant trust that to hold off moisture ingress especially where I live. Not only that but I have faded paint on as well as on either side of these panels, so they would need to come off to give the roofline a proper respray. My goal is to get in there and put a healthy amount of epoxy instead of panel filler/bog and potentially skin with carbon fiber. I have 2 spare rolls from an old motorcycle fairing project from a few years back and I think it'd be a nice touch on a black stag.  I've seen some threads where people replace their roof rack delete with a welded in sheet metal part. But has anyone re-worked the roof rails themselves? It seems like there is a lot of volume there to add in some threads and maybe a keyway for a quick(er) release roof rack system. Not afraid to mill something out if I have to. It would be cool to have a cross bar only setup. That way I can keep the sleek roofline that would accept a couple bolts to gain back that extra utility  3D print some snazzy covers to hide the threaded section to be thorough and keep things covered when not using the rack. 
    • Probably not. A workshop grade scantool is my go to for proper Consult interrogation. Any workshop grade tool should do it. Just go to a workshop.
    • In my head it does make sense to be a fuel problem since that is what I touched when cleaning the system. When I was testing with the fuel pressure gauge, the pressure was constantly 2.5 bar with the FPR vacuum removed. When stalling, the pressure was going up to 3.0 bar (which is how it should be on ignition).
    • ECUtalk pages don't mention they support the ABS computer (consult port has more than one CAN), so you might just need a different scan tool. But, I would expect ABS is a different light to the brake warning/handbrake light, do you see an ABS light come on for a few seconds when you turn the key from ACC to IGN? But since you said: I'd have a look at the ABS sensors in the rear hubs to make sure they are not damaged, disconnected etc.
×
×
  • Create New...