Quote:
Originally Posted by WSSix
There's also the possibility of running a LSx PCM on the SBC. www.eficonnection.com has the setup.
It really can get confusing to decide which EFI system to utilize. I personally am in favor of the LSx PCM whenever possible. None of the aftermarket systems come close to having the level of investment in them that GM put into the LSx PCM. However, do you need all that the LSx PCM has to offer to achieve your goals? I've built EFI systems utilizing a L98 SD PCM. It worked great and this was just a few years ago. So, yeah, it gets confusing and difficult to decide.
What I would recommend is that you focus on achieving your power goals properly and reliably first. After all, EFI is not needed in order to achieve your power goals. Then, I would decide which EFI system to go with. Just factor the extra cost of EFI on the LSx engine into the initial cost since chances are you'll buy a pullout that has a perfectly adequate PCM already there.
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Thanks for the link and the info. Just want to point out a few things with my build to help with more info.
I guess I shouldn't have really stated power as an overall goal. It'd be nice to have 700whp but I'm not 100% set on it, I'm not trying to hit a 1/4 mile goal or dyno # goal. This will be a street/road course/autocross car.
It sounds like you're suggesting that going EFI on the SBC will not take the same initial cost as going EFI on an LSx setup, why? The LSx will already have what's needed on the motor itself and the rest would be the same as going EFI on the SBC, no? Fuel lines, tank, pump, etc. Or am I missing something here? I don't want to run an external pump from the tank, so I'll be getting a new tank for that.
Now I'm actually leaning towards having someone re-tune my SBC and Carb setup and doing all my underbody first. I want bolt on subframe/suspension front and rear. Thinking of doing that first since I have an already decently solid SBC build. I think it's just not tuned correctly for it's new location (GA vs CA)
Oh and I do plan to run a GM ECU not an aftermarket/standalone unit. From the tuners I've spoken with I see no need to go aftermarket, both for N/A and boost applications.