My one and only goal with the Cruze Challenge project is to finish. Finish building. Finish the event. Finish as close to the top of two specific areas. You know Finish.
In order to finish as high as possible in the autocross and drags I want to run maximum possible boost, which means I will need a LOT of fuel to accommodate that, and higher octane as well, so E85.
The Cruze uses an EV14 pencil injector. As luck will have it there are inexpensive 60 and 70lb real Bosch and Denso injectors remanufactured.
So how do I determine what I REALLY will need on a 1.4L engine running 20psi, E85? If I decap a set of 70lb injectors am I asking for trouble?
The only problem I've really ever heard about decapping injectors is they don't all always end up with flow rate, people say you have to usually get a handful of injectors, decap them, then find the ones that flow the same. Also sometimes the spray patterns can get less than ideal after being decapped. I'm not expert as I haven't done it but these are the watch-outs that I've heard of
If you are starting with 70lb injectors, that should be good for e85 and boost on a small motor. I would suggest starting there and changing them when you find you need them.
Most people running decaps get a couple sets, decap them all and have them cleaned/flow checked. I think both Calvin Nelson and Twisted Builds did DIY arduino flow benches a couple years ago. That's another project I have all of the parts for but haven't had the drive or time to finish. Check the two links below for more injector info
FB Decap Injector Group
Injector Size Calculator
In reply to RacetruckRon :
Wow a fb page for that. Interesting. We did it back in 2002 with our challenge car.
QuasiMofo (John Brown) said:
So how do I determine what I REALLY will need on a 1.4L engine running 20psi, E85? If I decap a set of 70lb injectors am I asking for trouble?
Really all it comes down to is how much power you want it to make, there are lots of fuel injector calculators online where you just punch in the desired power, # of injectors, and fuel type and it spits out an injector size. 70 lb/hr should do 350 crank hp on E85.
https://deatschwerks.com/pages/fuel-injector-calculator
