Hi, borrowed a bit of money ($1500) and was wanting to get bigger injectors and a tune would like a few suggestions please on what you guys have done? My power goal would 300wkw. I dont have enough money for turbo upgrade i really only have enough money for injectors/tune/bigger fuel pump. And where to take it to in Brisbane to get all this done. Thanks
If you want 300rwkw on standard turbos you need 1000cc injectors, flex sensor, nistune and e85. And a bigger budget. Best advice pay back that loan and start saving!
ok, so if i get more cash what would be the best way to go about getting around 300wkw? should I keep the stock turbos and go e85?
E85 is the only way you're going to see 300rwkw on stock turbos. I recently set up a car to run e85 and it made 299.9rwkw on stock turbos. If you want me to quote you for something similar shoot me a PM. It's running what's called a flex tune meaning that he can fill up with 98 or e85 and the ECU adjusts the tune accordingly. Manual turbos are a must -I don't believe auto turbos would hit the same boost level.
High flowed turbos with 740cc injectors and a tune on 98 should see similar peak power to E85 on stockies for somewhere around the same price point. Which is 'better' depends on your needs and plans for the future. E85 pros: more torque for the power, whatever kit you get now is going to be very future proof, suitable for big turbos later on. Cons: You need to get E85 and if/when you have to fill up with 98 you have to drain it or use it up to get back to that power level Highflows on 98 pros: Will always have that power on tap even when traveling. Fewer aftermarket gizmos needed to be installed in the engine bay. Cons: with E85 added later on you can make mid to high 300s but beyond that you'll need to upgrade the turbos again so not super future proof. For the same peak power you'll have less torque down low so wont feel like it pulls as well as the E85 option.
The car above that made 299.9kw has a bde top feed conversion, 3" catback exhaust, front mount intercooler, nistune and 20psi. ..factory dump pipes. On manual turbos ofcourse. A good setup would be, Manual turbos 2.5" catback highflow cats 3" split dumps Upgraded smic's 1000cc injectors - preferably top feed Selin dual maf Nistune e85 and 20psi That would produce around 310-320rwkw if your turbos are in half decent condition. Or just read my sig
All good and relevant info as usual BUT I think the biggest point is cost and ease of install. With nistune having flex capabilities now there's no need for draining tanks/switching tunes etc and all of the parts can be fit without pulling the motor or any serious dis-assembly. Entry level high flows and nismo 555s will set you back like $2500. I can do bolt-on top feed rails, 1000cc injectors, flex sensor and fittings for about $1750. Having find a couple of these now e85 gives much better return on investment.
Yeah, don't need to drain it to swap fuels but if you want that power level back after having 98 in it you need to run the tank right down, not a problem that everyone will care about but if E85 isn't common in his area and he wants to take it to a track and have the full 300kw it will need some extra planning. When you said bigger budget I assumed it was a bit over $2k for the kit, to beat your quote would need to be second hand turbos or a good deal on the injectors. When availability isn't an issue E85 is definitely the more appealing choice but it isn't the undisputed winner yet.
Can't argue with a 300kw bolt on option with better response and a set of aftermarket dumps would increase that to around 310-320rwkw. Not to mention they have a bit more boost left in them. Hypergear Highflows are $1700 + shipping, and to go E85 on highflows you'd need 1000cc injectors at a minimum....740 won't cut it as they are borderline on factory turbos.
If your budget is 1.5k then 300kw is out of reach 4 now!!! Do the basics dumpipes/injectors/manual boost controller/nistune... Whatever you can really! My Advice: Don't go overboard on injectors as you will be chewing too much petrol even when you idling. Specially if it is your daily ride, and I assume it will be. With stock turbos/intercoolers I wouldn't be going above Nismo 555's E85 has 33% less energy content than 100% gasoline. So you need to compensate for 33% by installing bigger injectors to give it enough fuel... By installing bigger injectors for E85 and running 98 (daily ride) will not be so efficient as big injectors are spitting so much fuel when they don't need to!!! idling/peek traffic/cursing... Only advantage is when you floor it... but how often you do it? When you do all supporting mods for bigger turbos/injectors, you can always sell your Nismo's and go bigger!
No point putting 555s in, they are too small for E85 and there's really no need to change the factory injectors if staying on 98. Seeing as the OP wants 300rwkw, he WILL need E85 on factory turbos to produce that figure and he WILL need 1000cc injectors at a minimum. My zed on 1000cc injectors hits 70% duty cycle on high boost with a ethanol content of 71%, this figure will be slightly higher on 85%. To the OP, give that money back and start saving.
With the dyno I posted above there's no discernible difference in low-load driveability or fuel economy compared to previous tune on 98RON and standard injectors. It probably sounds like I'm pushing a barrel but honestly the results are consistent and repeatable; e85 conversion is your best bang for buck in terms of upgrades. Again with the dyno above you're seeing about 269rwkw on 20psi on 98 (same as it made with standard injectors and a tune). On e85 it makes 300rwkw at the same boost level. It's great stuff -have a look at what is being achieved with other platforms on relatively stock builds.
Would be interesting to find out. I suspect will be mostly timing. But how much? Will be pumping the extra 30+% fuel but Lambda should still be around the same for both fuels.
From engineering standpoint you wouldn't wanna run your stock injectors at 100% duty cycle. Thus why you need 555's. For the guys that are not familiar with the subject: Reason why you don?t wanna run injectors at 100% duty cycle is that you don?t burnout injector coils, and running them at 100% duty cycle you will eventually (I can?t guesstimate how long that will take to happen but it will). And yes you can alter your fuel pressure ratios dropping the injector duty cycle a bit, but I don?t wanna go there just yet? Let?s run some figures first... For the power of: 402RWHP or 300RWKW On the 6cylinder turbo engine Fuel pressure of 46PSI (stock fuel pressure regulator) Injector Size Required: Injector duty cycle 80% (safe) Fuel Type cc/min lb/hr Gasonline 590.05 56 E85 767.07 73 ---------------------------------- Injector duty Cycle 85% (Safe) Fuel Type cc/min lb/hr Gasonline 555.34 53 E85 721.94 69 AND NOW FIGURES FOR: Altered Fuel pressure ratio @ 62.5PSI And altered Injector duty cycle @ 95% (Danger zone) Fuel Type cc/min Gasonline 426.28 E85 554.16 From the figures above I?m safe to say that you can run Nismo 740cc at 85% duty cycle on E85 and archive 402HP, or even 555?s in ?I would call it extreme conditions?, but I wasn?t talking about E85 at all? For the power of: 356RWHP or 266RWKW ------------------------------- Stock Injectors type1 370cc For the power of: 356RWHP or 266RWKW Altered Fuel pressure of 62.5PSI And altered Injector duty cycle @ 95% (Danger zone) Fuel Type cc/min Gasonline 377.5 E85 Not supported By my calculations you need to alter your fuel pressure to 62.5PSI and run 95% duty cycle to archive 266RWKW with stock injectors. The main thing most people look at when considering upgraded fuel injectors is flow. For newbies: Flow is the amount of fuel that passes through the injector per minute. For example, a 1000cc injector puts 1000 cubic centimeters of gasoline into the engine at peak flow. That?s a Litre every minute at full throttle per injector at 100% duty cycle. 6 Cylinders = 6 Litres per minute!!! In essence, fuel economy goes out the window when the pedal is to the floor. Therefore, matching the proper injector to your specific application is a MUST. This is where planning ahead comes into play, knowing how much power your car will be using and pairing it to the correctly sized injector. If you go overboard when selecting injector size, your wallet might suffer just as much as your engine if the injectors were undersized. I won't comment on ability of stock turbos to flow enough air needed for 400HP as I'm not quite sure they are able to... A bit long and boring but here it is ....
