FURBY LOC"S

So currently trying to build a 1000+ whp car c7 z06 and trying to get inputs of what you guys think is a best relaible option for 1000+whp fuel system
tunner is thinkinng on using acm prospeed ecu ,dual pumps, injectors, etc but using the port injection as primary fuel system instead of the factory fuel sytem what you guys think? Or what have you guys done?

Jeff V.

The combustion chamber is optimized for direct injection, so I can't imagine it'd be a good idea to try to get rid of that...

RickHoppe

The ZR1 uses the same direct port injection setup as the Z06 but adds port injection to get the extra horsepower.

FURBY LOC"S

that's what I was kinda thinking

djnice

I have seen a couple port injection systems out there and they came out before GM created the LT5. I think they are secondary rather than primary. Here is one for example.
https://www.corvetteforum.com/forums...di-limits.html

MCK_Z06

What Jeff said. port injection is normally installed as a secondary system on these cars.
On mine under normal driving conditions it only runs on the DI system.

Once I get into boost or a certain RPM under load the port injection kicks in to help out the DI system.
Same thing when I run Ethanol, the DI system needs help as you open the throttle up and require more volume.
I personally would not set my car up the way your are describing. It would require twice the tuning time I would imagine because you are trying to replace what's already working with something else.

spinkick

Katech just came out with a fuel pump that can support your 1000 hp motor without secondary port injection. Hopefully @katechJason will give me a finders fee

Poppacapp

I saw that. Pricing seems way out of bounds and on the verge of gouging though.

Darkknightz07

It's similar in pricing to the better port injection systems I have seen. I am planning on upgrading my OEM pump and injectors soon to support a 2.9 Whipple. Now that Katech just released this I am going to have to do more homework and possibly stop by there to check it out.

Poppacapp

Yes.. similar pricing. I am sure they could be cheaper though. Similar to the rear spindle fiasco. Initial vendor offered at huge price.. anither option hits and all of the sudden they are now half price. You think they are losing money now? Nope...

Darkknightz07

Agreed. It is definitely a huge price to pay, especially considering you'll need bigger injectors to support that amount of fuel flow. My only point was if leaving the OEM pump alone and adding this standalone pump and replacing the injectors is more reliable and supports 2k hp versus keeping OEM pump and adding a port injection system I would probably go with this DI kit. We will see where pricing goes, but I am still leaning towards a lingenfelter pump and injectors (as long as I see satisfactory results with a 2.9 blower).

"BoneStock"

Im doing a whipple 2.9 with weapon x spi kit. I think the katech stuff is over 8k in parts where the spi kit is 5k.

spinkick

I think we michigan guys may be a bit biased haha

Darkknightz07

Biased for sure. I ended up ordering the Katech Xtreme DI kit (2800 PSI)... Planning on testing the stock blower on 100% E85 no meth and then eventually swapping on the Whipple. Will get back to you with results!

C5-VERT

There is a reason GM went with SECONDARY port injection on the ZR1. Keep in mind leaving your stock DI alone keeps the car working efficiently, easier to tune, and reliable. The secondary port injection ONLY kicks in including the low side auxiliary system only when boost > (x) PSI. Meaning the car drives just like stock around town, then the secondary fuel system + port injection kicks in ONLY when needed. That sounds perfect in my opinion. If stock fuel system parts need replacing, you replace with factory ones, not very $$ upgraded ones. 30% DI injectors aren't cheap. Neither is a larger DI high side pump. Leave those alone, get a low side system (I got a WeaponX it's very high quality and good for 1500 wheel), you already have the ProSpeed ACM sold you (much cheaper than new I might add with boost control, etc), get some FIC 1000cc injectors ($800), manifold w/ bungs, then get it tuned. You will come out much cheaper going that route and can fuel more than what you ever ask for. Port Injection the sky's the limit, go with a larger FIC injectors = more HP. You, however, will be limited with 30% larger DI injectors and a larger DI high side pump. Not to mention to make that work you need a larger fuel lobe on cam that's not cheap either...