EFI SBC vs LS Motor - Lateral-g Forums

redefined · #1 12-22-2013, 11:32 AM

Thanks for the info guys, didn't know that about the ProCharger, good to know!

It sounds like I might end up going turbo after all. Those other style chargers introduce a decent amount of heat/soak issues due to their placement for the style driving I do, sounds great for 1/4 mile though but I don't do that except for fun with friends. I'm for sure not chasing any 1/4 numbers though I'd much rather spend my time on the street and road courses.

Sounds like for what I want I do just need to go ahead with an LSX style swap and well my built 350/tranny.

Good info! I'll look more into the comparison of procharger vs turbo setup now.

I've very familiar with what would need to be done to the motor, especially for the type of driving and power, but had no clue of that ProCharger and the way it reacts. We'll see if I decide to built the motor or not for whatever I decide. After this research I'd been thinking of doing everything else, other than the motor, first. Mini-tubs, front and rear subframes etc. Decisions decisions!!

Thanks!

**GregWeld** · #2 12-22-2013, 11:39 AM

That "heat soak" issue you mention certainly hasn't played out in the last few Corvettes and Cadillacs that are running factory roots style blowers.

Quote:

Originally Posted by redefined

Thanks for the info guys, didn't know that about the ProCharger, good to know!

It sounds like I might end up going turbo after all. Those other style chargers introduce a decent amount of heat/soak issues due to their placement for the style driving I do, sounds great for 1/4 mile though but I don't do that except for fun with friends. I'm for sure not chasing any 1/4 numbers though I'd much rather spend my time on the street and road courses.

Sounds like for what I want I do just need to go ahead with an LSX style swap and well my built 350/tranny.

Good info! I'll look more into the comparison of procharger vs turbo setup now.

I've very familiar with what would need to be done to the motor, especially for the type of driving and power, but had no clue of that ProCharger and the way it reacts. We'll see if I decide to built the motor or not for whatever I decide. After this research I'd been thinking of doing everything else, other than the motor, first. Mini-tubs, front and rear subframes etc. Decisions decisions!!

Thanks!

redefined · #3 12-22-2013, 11:49 AM

Quote:

Originally Posted by GregWeld

That "heat soak" issue you mention certainly hasn't played out in the last few Corvettes and Cadillacs that are running factory roots style blowers.

For road courses or 20-30min track sessions? Is this the new LS9 motor you're talking about?

**GregWeld** · #4 12-22-2013, 11:59 AM

Quote:

Originally Posted by redefined

For road courses or 20-30min track sessions? Is this the new LS9 motor you're talking about?

LS9 or LSA -- either one.

redefined · #5 12-22-2013, 12:15 PM

Quote:

Originally Posted by GregWeld

LS9 or LSA -- either one.

Ya, won't be going with one of those motors though heh

uxojerry · #6 12-23-2013, 07:59 PM

At 500fwhp it would be cheaper to do a 383 rotating assy, port the heads/intake and buy a FAST 2.0.

At 700rwhp you need to go LS, and be prepared to spend some money. Another option for 700rwhp is a BBC.

redefined · #7 12-23-2013, 08:37 PM

Quote:

Originally Posted by uxojerry

At 500fwhp it would be cheaper to do a 383 rotating assy, port the heads/intake and buy a FAST 2.0.

At 700rwhp you need to go LS, and be prepared to spend some money. Another option for 700rwhp is a BBC.

While a BBC is sexy sounding I'm not sure I want the weight. If I do swap the motor I'll 100% go fuel injection too.

TheJDMan · #8 12-24-2013, 05:38 PM

I agree a BBC would be too heavy. The real issue is which EFI system. Holley, FAST, MSD, who makes the best throttle body EFI? They all just keep getting better.

obengston · #9 12-24-2013, 06:12 PM

Quote:

Originally Posted by TheJDMan

I agree a BBC would be too heavy. The real issue is which EFI system. Holley, FAST, MSD, who makes the best throttle body EFI? They all just keep getting better.

This question is in my opinion, comes down to who you ask. Reason I say that is I researched the same thing for months and had good/bad on all of them. Its really coming down to looking at what they all do, and put all the inputs together and chose your poison. I have the Fast 2.0, because I loved what I read. Its has been a small challenge so far to get it to being that "Plug and Play" as advertised, but right now its working good (didn't say great/awesome), but hopefully with more time it will be. Thats my 2 cents.

**WSSix** · #10 12-25-2013, 08:32 AM

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.