Brezza

Hey mate, I'm happy to talk you through what i've got setup! I've got 1000cc injectors, 2 x intank pumps (mounted in the stock cradle), 2 x fuel lines running from the pump to the fuel rail, the fuel rail has been modified to take a bigger single line (just to keep std looking), the twin lines merge into a single fatter line just before the bigger fuel filter. the twin pumps have their own separtate power supply. i had all the work done by Shaun @ Boostworx, my car was the first car he's setup like this so it kinda was a ginnea pig. but its worked out well, had a few teething problems at the start but its all going good. i've got 370rwkw which is where you're at now on PULP but i've got my STD intercooler holding me back and STD cams. I wanted my car to look as near to stock under the hood as possible, appart from the Autech style catch can there is nothing bleeding obvious under the hood (thats the way i like it) the tune isnt too aggressive either. but the fuel setup could flow much more power. Drop me a PM with any questions you might have.

Still for sale

That's a good one!

Fuel pump will add no more power, i've got walbro pumps in my GTR. they're smaller than the bosch ones and are good for 350rwkw std fuel reg doesnt need changing ever! i've got mine still running 1000cc injectors with twin fuel pumps and e85. i dont understand why people get FPR's IMO here is what you should do if you haven't done already 1. 3in exhaust at minimum, also look at upgrading front pipe 2. K&N air filter for airbox or pods 3. remove boost restrictor to run 14-15psi this should get you up to 250kw 4. Upgrade ECU (Nistune is good value and i'm running it in my car) this should get you 250-280kw 5. upgrade injectors to 660cc or more & fuel pump with a tune you should be able to get around 300kw at this level you'll be around the max of your turbos, you could choose to push them hard with AFM's but it gets pretty $$$ either Nismo's or Z32's

I think i got a set of these c spanners from Mazdat from memory they were $20 express posted to my house!

Still for Sale

I looked into these when i was doing my e85 conversion. but like BeerBaron said with the base fuel pressure being over 40psi i was going to run 25psi of boost pushing fuel pressure to over 65psi. i have 1000cc injectors on e85 so it needs quite a bit of fuel flow. i went the twin walbro pumps mounted in tank, running a second fuel line down the car and merging into a single -8 feed into the rail i think from memory? i dont get any issues with flow running two fuel pumps. I've also had them setup to a direct feed from the battery so they get full voltage.

reson for selling?

Are these sold?

I've spoken to a few people with 3L RB's and they've had much bigger gains on E85 due to the higher compression of the 3L. One bloke was telling me how the 26 doesnt have as high compression as the SR's or the RB30. so therefore the 26 can't take as much advantage of the knock resistance of the fuel. I've had minimal top end gains in my GTR going to E85, only really made gains in the midrange. but i did get it tuned on a hot day and it still made good power. the STD intercooler is probably holding me back. Am getting it tuned this Thursday, hopefully it will be a little cooler and get some better figures. the tuner tuned it on the richer side just in case it leaned out too much in colder weather. So hopefully with a cooler day and leaner AFR's i can get a little more out of the car? Have been running E85 for just under a month and going back to get the fuel filter changed. the mechanic said that my tank looked to be pretty clean when installing the twin pumps intank. so i dont think that the fuel filter would be too dirty. i might just change the fuel filter this time and if its still pretty clean i will just do it after another 6 months or so. I've noticed that on E85 my oil has been looking much cleaner? has anyone else experienced this? on PULP the oil used to start to look darker, but on E85 is still looks fairly fresh.

660cc Injectors to suit RB26 fuel rail Rochester Type injectors. Cost me $660 to buy and $100 to modify to suit rail. Will sell for $500 Ran these in my GTR for 1 year, only changed them for 1000cc injectors for e85 Good injectors, never had any dramas with them. Pulled some good power with them. Perfect for a GTR wanting to get in the 300+kw range on PULP Had these running on my GTR @ 18psi with STD AFM's and got 320rwkw then when i upgraded to Nismo AFMS' i ran 22psi and got 350rwkw Still had headroom for more power PM me Located in Glenelg, SA Willing to post for extra

660cc Injectors to suit RB26 fuel rail Rochester Type injectors. Cost me $660 to buy and $100 to modify to suit rail. Will sell for $500 Ran these in my GTR for 1 year, only changed them for 1000cc injectors for e85 Good injectors, never had any dramas with them. Pulled some good power with them. Perfect for a GTR wanting to get in the 300+kw range on PULP Located in Glenelg

Count me in!

At what level did you run out of puff with the std GTR intercooler? I had mine tuned on e85 and gained bugger all top end, only 5rwkw, and that was pumping more boost into it. Granted it was tuned on a bloody hot day, 35+ degrees. the intake temps were quite high. and the tuner gave the car long breaks inbetween runs. the midrange is wild now and it pulls over 500nm of toque. so its fairly punchy. I'm going to take it back someday and get it tuned again on a cooler day just so he can tidy up the tune as he left the top end a little rich just incase it was a cold night and the mixtures leaned out too much. rather be safe than sorry. I've been looking around for a FMIC but finding one that will flow 400kw is quite $$$ I'm not too keen on getting a cheapie like cooling pro and finding that its no good and i've wasted my money by getting one that doesnt flow aswell or has a severe pressure drop. It becomes a very expensive task to get a 2.6L motor over the 350rwkw mark. i've been told that the big gains are to be made in the midrange on e85 rather than top end, is that correct?

I'll get another printout with the AFR on the graph, i'm going down there on saturday to have the fuel tank sender unit looked at and maybe replaced. I didnt even think of asking for a printout of the AFR's on the graph I think it may have been bumped when they were fitting the fuel pump or it may be caught on something? Can definitely smell the e85 on boost and when at the lights. i like it!

Got the GTR back the other day, It runs pretty well, Had a little bit of trouble with the pump wiring because the relay wouldn't switch the pumps on and it would stall when i was driving. Now that's all fixed its all good. It makes 355rwkw on 24psi a little low, was expecting more like 380rwkw at that boost level. but it was a hot as day, about 35 degrees and on the dyno the air intake temps were high. Its running rich too for safety, around 11.0:1 AFR the tuner told me he'd rather me be down on power rather than blowing the motor when the air is cooler and the car leans out too much. There is a fair bit of timing put into the tune, its got over 500nm of torque and adjusting the timing more didnt have any effect so he left it. Is it true that e85 gains more power when run a little leaner? something like 12.5:1 or leaner? I'm going to take it back there when the weather is a little cooler and get the mixtures leaned out a little more. I remember my old tune being on pump fuel something like 10-10.5:1 so its only a tiny bit leaner on e85 I've read that there is a fine line where a fair amount of power can be gained between 11.5:1 to 12.5:1 on the same boost. So i'm hoping that when the mixtures are leaned out i'll get to the power figure i want. Also i think the std GTR cooler would've been struggling to work efficiently in the weather we've had. Ah well, at least i know in the hot weather i can still put lots of power down, midrange is where i gained a lot of power, around 35kw because the graph seemed to tabletop in up in the revs will post up graph when i can find it

how reliable were the dyno runs with this cooler? others dont seem to have such high numbers?

+1 for getting the 2.5in section replaced. On my WRX years ago the owner had a terrible exhaust on it, pieces were 3in, some still had stock mufflers and resonators. it was all welded together horribly and the dump pipe had a big dent in it from where it was bent into shape. after i had the catback section replaced the car was louder, but still didnt gain any power because of the dent in the front pipe. this dent was quite big and was definitely restricting it. The exhaust bloke said its like when you step on a garden hose, the amount of water that comes out the end is less because it cant flow past the restriction of your foot on the hose. moral of the story, had the dent fixed, welded in a new 3in section and gained power all over the power band.

Just got off the phone with the mechanic. The second Walbro pump is fitted inside the cradle, the second pump has been connected to the std return line and he's in the process of making up a new return line. the fuel tank lid has had an extra feed into it for this return line. The std fuel rail is going to be modified for a second feed also. And the pumps still need to have a separate wire run from the battery to ensure enough they're getting enough power. It seems to be all coming along nicely, hopefully it can be finished off tomorrow and tuning can start to happen if all goes well. Fingers crossed there is no leaks Hopefully have it back before the weekend

I highly doubt it would be an exhaust restriction. If power is a table top then its the injectors. I remember before i did my AFM's i was running 18psi and it was around 310rwkw, and the top part of the curve was a table top. but after i got the Nismo's pumped another 3psi and the top end fattened up heaps, midrange was same but all the power was gained it the topend just because of the extra boost and the AFM's for not being maxxed out like the std ones. i have a 3in exhaust and make 350rwkw. i still have the same 3in exhaust and am getting the car tuned on e85 and aiming for 380-390rwkw

Just do injectors and retune This will give you enough fuel to actually pump a decent amount of boost through the turbo's to get them to run really nice! i find they really come alive with 20+ psi through them. You would be running the std injectors at their max at that level. you've got some good hardware there. it just needs more fuel supplied

Also you're not going to get good response on -5's compared with other smaller turbos. IMO they're not a laggy setup, but definitely not super responsive. i did however notice a difference after the rebuild, the response picked up a fair bit probably because the old motor was too tired?

Leave the stock airbox, i made 350rwkw with one. My GTR has pretty much the same mods as you appart from bigger injectors. Next thing to do is injectors and retune. Do you have the z32's on the std airbox or are they still std AFM's? With that boost you should be much higher than 300rwkw Get Injectors and retune, should give good results. Also new coilpacks if you want to replace them before you have issues, i went yellow jackets and they work fine! about half the price too!

Dropped the GTR off today!! The plan is bigger fuel line, second intank pump and 1000cc injectors. hopefully it doesnt take too long. Will post up results of the tune on e85 when its finished.

My spark plugs are fairly new in the GTR, only been in there for around 4 months now? I suppose I'll just have to wait and see how it goes on the dyno and see how far it can go before getting miss from the spark plugs. Will keep in mind about going a hotter plug Cheers for clearing it up about the fuel filters, i might just give it a little while and just change it if its easy enough after a few tanks?