Big2Bird

Anybody used one of these? They are C.A.R.B. certified. Would make life much simpler.

https://www.msdperformance.com/produ...tbi/parts/2900

Shark Racer

I'm running it.

https://www.corvetteforum.com/forums...post1596347426

As said, I prefer having the computer control timing. It made for a much smoother experience. I'm at the point now where most things are better than they were with the carb. Cold starts, A/C at idle, high gear cruising. It's been long enough now without a carb that I don't even really remember what was better.

It's the best way to get electric fan control and an IAC so A/C engagement doesn't completely bog down your setup like it does w/ a carb+idle stop solenoid.

Let me know what you'd like to know. I did the entire install myself, nose-to-tail. OK, I didn't weld in the O2 bung.

Big2Bird

You ditched the EGR, correct?

lionelhutz

I guess if you need CARB certification. Otherwise, I would pick the Holley Sniper system ahead of this one. Sniper is Holleys new EFI system offering so they are still putting development resources towards it to expand the product line.

Big2Bird

CARB is a must. It is what it is.

Shark Racer

No, I'm running it. There's a ported source on the MSD throttle body you can use for it and EFE.

If I was chasing the latest and greatest, I'd _at least_ be running a crank trigger, COP and port injection. TB EFI wouldn't be a consideration but, like Big2Bird, my creativity is shackled by CARB.

All said and done though, I frequently question not going with a BAR'd LS swap.

lionelhutz

Call Holley and find out if they are CARB certifying the Sniper TBI.

I was believing that Holley was building the MSD EFI systems, but don't know for sure.

Big2Bird

At this point, that would double the price of what I want to do. I think a 383 with this Atomic unit might be the trick.
1 flash for drive, and one flash for Kalifornia.

Shark Racer

Yeah, it really was more of a personal anecdote for me, and related to my note about TPI, crank trigger, etc. When I did the 400SB in this car I didn't have EFI. Now, atomic EFI + feedback ignition system + fuel system + 400SB, it would have been a bit cheaper to do an LS. Oh well, it still looks fairly OEM on a hood pop and will blow the doors off quite a few cars.

The only thing I do for smog is drop the base timing so it will pass the timing check. No need to change AFRs or anything like that. Shoot for stoich (14.7) at idle and cruise. A little richer at idle if you need to, since you're not at idle for the test anyway. They shouldn't be hitting WOT during the test, so the max power AFR doesn't need to be changed.

Big2Bird

Where did you put the pump? (I haven't read any paperwork yet).

Gale Banks 80'

Yes MSD has been swallowed up by the Holley Jugernaught. And like the Accel System it will continue until somebody decides otherwise. And then all the valuable parts and service will be thrown out never to be seen again.

Shark Racer

Regarding fuel systems, the EFI system is pretty standard fare.

I went with a return-style system. I used an Aeromotive Phantom setup, to the right of the fuel sending unit on top of the tank. PTFE lined AN-6 hoses run the original route of the fuel lines.

For venting, I'm using the charcoal canister. The Vent port on the Phantom bulkhead is plugged.

I mounted the filter and regulator (also Aeromotive) to the floorboard. I've since moved the regulator and want to relocate the filter back to the passenger rear frame rail - it's too noisy and the floorboard acts like a subwoofer cone from fuel pump pulses.

Essentially, my system goes:
Tank output->short section of line with coupler->filter -> MSD port (front, I think) -> injectors -> other port (rear?) -> regulator -> short section of line with coupler -> tank return.

The OE sending unit output and return are capped and clamped.

I did use the Atomic fuel pump power line to power the EFI pump and routed it along the lines in its own bit of conduit.

Big2Bird

Did the referee make you keep the smog pump?

Shark Racer

I didn't go to a ref - for CARB exempt parts you shouldn't have to.

My car has the federal emissions label - no AIR pump. It's a good point, though - if you need to use an AIR pump, you'll need to make find a way to move the AIR inlets between your cat and O2 sensor, like a modern car. Unfortunately, the stock inlets will trick the O2 sensor into thinking your car runs lean.

Street Rat

FWIW my good friend installed this on his built 455 Pontiac.

He has some run-on issues but other than that he is very happy with the set up.

And I'm jealous.

cv67

That is gold in Ca wish I had one for my Camino
Driving without an airpump is grounds for an impound now
Guy I know still has my old one wont sell it back.

OldCarBum

I've been looking at this system and the sniper as well. I'm smog except so I'm leaning towards the sniper.
Since my plan is to replace my fuel tank anyway my plan is to put the pump in the tank.
Makes me a bit nervous but I haven't heard of anyone having issues and figure that's where all the new cars have the fuel pumps.

Shark Racer

If you come up w/ some kind of solution you'll be good to go.

The Holley Hydramat concept seems pretty cool, though I haven't researched it as I'd already sunk cash into Aeromotive by the time it was announced.

The fuel pump side of things is pretty easy. Running the lines was annoying.

OldCarBum

Thanks, I've been bending my own tubing for years. For me that will be the easy part.

Shark Racer

I should have had you do mine.

I went with PTFE lined braided hose, run in the channels of the original setup.

My research and best judgement after having done this would suggest that you will have to have a junction somewhere around the rear frame kickup if using hardline. You likely can't make those angles with the body in place.