25 replies to this topic

[The Chubby Chaser]

I finally got a single turbo setup for my x90!


Here is the setup I plan on running:

-Driftmotion rebuilt 60 trim ct26
-HKS 256/256 cams
-JDM 2J 440cc Injectors
-R33 GT-R Fuel Pump
-Gizzmo Intelligent Boost Controller
-Power FC w/ Hand Controller

I contacted Touge Works, the tuning division of Touge Factory in Chicago, and said I wanted to get the car tuned for 350-400hp with this setup. They replied back that 440s won't be big enough to meet my goal. I have read that the stock 370s maxed out are good for 420hp. I have also seen 1JZs make over 400hp with 440s.

So, should I trust the tuner, or tell them they are fucking stupid and have it tuned with the 440s?

[JimmyHoffa]

I wouldn't bet on 370s being safe at 400 rwhp. They might do it pushing your duty cycle above 90% and with your fuel pressure jacked to the moon but it would not be good practice.

According to the standard injector sizing calcs you should have 525cc/min flow to safely fuel 400 hp at 80% duty cycle. You can probably hit 400 with 440s, but if you're going to do it, you might as well do it right the first time and at least get a set of 550s for extra peace of mind. It's not like they cost as much as a new bottom end.

[bippu]

If an injector kicks into static (which is a strong possibility) kiss your engine goodbye.

That being said, I would tune it for you with 440cc, I just wouldn't run it past 85-90% fuel duty, and I would set a fuel cut just incase you decided to be a dumbass and try to run more boost.

Also depends on how rich your tuner wants to run the car. I don't like running cars pig rich because it's inefficient and washes out the rings.

[aphxero]

As a tuner id go 550. As a cheap ass I'd do the 440. But srsly, 440 is okay for 350. 400 not so much. And how are you controlling boost with that setup? What's your ecu?

[The Chubby Chaser]

I will be using a Gizzmo IBC and Apex'i Power FC.

[bippu]

As a tuner id go 550. As a cheap ass I'd do the 440. But srsly, 440 is okay for 350. 400 not so much. And how are you controlling boost with that setup? What's your ecu?

I ran 380whp on my GS with the stock 440cc injector...through an auto.

Like I said, it depends how rich your tuner wants to run your car.

[aphxero]

Like you said... I never said it wasn't doable I just gave my personal outlook if it were on my dyno. Personal tunes are a whole lot different than customer tunes. IMO, the guy at tf isn't being unreasonable he's being smart.

[The Chubby Chaser]

I will be using a stock Nissan R33 GT-R fuel pump. The RB26DETT uses 444cc injectors stock. I am basing my setup off of single turbo 1JZ setups found in the link below. A lot of them are running this fuel pump.

http://www.japanese-...ory/toyota.html

According to the calculators, I should be able to safely run ~325hp with 440s. That's not too shabby.

[Mats]

I'm making over 500hp with 700cc injectors and aeromotive stealth pump.

I maxed out 550cc injectors (95% duty cycle) making 450hp. Honestly i would recommend you going with 550 right off the bat and be safe.

[The Chubby Chaser]

Thanks for all the good info, gents.

Skitzo, the current pump in my x9 is 15 years old and still pumping strong. I plan on testing the GT-R pump before I put it in. A part isn't junk just because it is OEM, old, and from a certain company. I have seen several cars run stock Nissan Z32 pumps without issue. The GT-R was pretty much Nissan's cream of the crop. This is clearly a budget build. I'm using a rebuilt CT26 for f#ck sake.

I got offered a set of Blitz 540cc injectors for $250 plus shipping and paypal fees. Apparently they, "flow better than stock 2J 550cc injectors". What do you guys think?

[Mats]

i though 2j's had 440?

[The Chubby Chaser]

JDM 2J's have 440s. USDM 2J's have 550s.

[Stephen]

regardless of what injectors you buy, invest in taking them to a reputable injector flow tester.

most injectors won't actually be fully equal across the board, especially used ones. getting them tested and then adjusted to match is a really good idea.

[The Chubby Chaser]

According to every post above, you should run the 650s.

[bippu]

I have multiple customer cars that are running reliably 400whp with 440cc injectors. Like i said earlier, it depends how rich your tuner wants to run the car. And no, my personal tunes aren't very different than a customer tune.

And FYI, i would trust a 15yr old OEM fuel pump over an Aeromotive stealth pump anyday. 3 of the 4 a1000's I sold last year failed. American made junk.