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

    • Howdy friends, So another weird one today, I was looking into replacing some broken clips holding the front grille for the R32 GTR (part number 01553-03831), and noticed the brackets which are supposed to hold the grille in place were also missing 😑. I do recall seeing this issue many years ago, but didn't fix it at the time. A quick look on eBay and I was able to find the genuine brackets, along with all the screws which suited the headlights (part numbers 26042-08U05,26092-08U05). Happy days!....  Once they arrived however there was an extra nut in the packaging which implied that there should also be a bolt or a stud, and sure enough, after a bit of searching I found this thread from 2013, and @Ants clearly shows a stud should be present. Reading around a bit more, it's possible the headlights on my car are the "povo pack" headlights as mentioned by @funkymonkey in this thread way back in 2008. This could explain why the studs are missing on my set of headlights. Looking at the headlight diagram I wasn't able to see a suitable part number for the stud itself. The headlight did indeed have a recess that looked like it would accept a stud, but interestingly no thread or anything obvious how the stud would be affixed to the headlight, I suspect it may have been glued in, press fit, or melted into the plastic at the factory. Another member may be able to clarify if they happen to have a genuine set of N1 headlamps. The only thing we have to work with within the recess is a keyway which likely is there to prevent the stud from rotating within the recess. In any case, back to 3D printing, I put together a model which acts like a pug with a friction fit inside this recess, making use of the keyway so it doesn't rotate while tightening a bolt. Printing in TPU will allow it to slightly swell making a nice snug fit without cracking the part. I've designed the adaptor it to accept an 20 mm M6 bolt (stainless with a cap head in my case), as opposed to the standard M5 stud and I made use of the standard galvanised split washer that came with the genuine brackets from Nissan. Once the bolt and screws were all in place, giving the bracket a gentle shake gave the classic "shaking the car" feeling, very solid, which gives me confidence this is going to be able to hold on much better than the janky solution which seems to have been here for the past decade or so. Overall I'm really pleased with how this turned out and maybe there are more people out there running these headlights without a centre stud at all! Link to the freely available model on Printables: Click here Regards, Sean  
    • Hey everyone, This is my first post apart of the introduction. I tried searching a bit on the forum but couldn't really get a straight answer. I got the car to my mechanic as I felt it being weak. It seems that it was missing on two cylinders due to the injectors. I had all my injectors clean and the car runs much better. The mechanic also confirmed my suspicions that the cat is clogged and needs to be tackled asap. The cat rattles a bit and the hot exhaust warning frequently lights up when driving after getting the injectors clean. In my introduction I was asked about what modification I might be interested in and mentioned a cat delete. From what I was told, this is not really beneficial on the RB20DE and there are more cons than pros.  Could perhaps anyone give some suggestions on what the best course of action would be since the current cat is toast and needs to be removed/replaced anyway? I can also sometimes smell a strong smell of fuel, but I'm not sure if this is related.
    • Hope the cans went down well at least 
    • 255 can't go wrong with the price.
    • When I was replacing my pump due to being stranded in the wrong state, I went with the Deatschwerks 320lph kit. It is a direct plug in to the stock wires, harness, everything. It comes with a plug... but you can plug the OEM plug directly into this thing. https://justjap.com/products/deatschwerks-dw300-fuel-pump-nissan-s13-silvia-r32-r33-r34-skyline-c34-stagea?currency=AUD Downside: Won't actually flow that much on boost if you want to push it on E85, but it's comparable to the 040/255 etc. Little more actually.
×
×
  • Create New...