[jhein]

Originally Posted by JLMounce

Yeah that's typically why they are run, for the accident based issues.

I'd talk with Tanks Inc about it. I don't know much about them, but it seems like a basic hobs switch, these are commonly run in various applications. Is it possible that the people having issues have them installed in such a way that the issue is presenting itself?

My question is how far do you want to go with this? If the only thing you're worried about is a bit of cranking if the car sits for a while, but otherwise you don't have any fuel starvation issues with your mechanical pump, is the juice worth the squeeze here?

My personal preference, but if my car has sat for a couple weeks and there's no risidual oil on the bearings, I don't mind a bit of cranking to get some oil flowing through the engine.

I don't know but people have suggested that even if I don't have any obvious starvation, it's still happening. I don't know if that only matters for someone who is racing or if would have any noticeable effect in a street only car like mine. So you are running a mechanical pump? I had you pegged for a in-tank guy.

[JLMounce]

Originally Posted by jhein

I don't know but people have suggested that even if I don't have any obvious starvation, it's still happening. I don't know if that only matters for someone who is racing or if would have any noticeable effect in a street only car like mine. So you are running a mechanical pump? I had you pegged for a in-tank guy.

No, I run a FiTech system with an in-tank pump. The EFI controls everything having to do with the fuel system. If the engine stalls, the fuel pump is shut down.

And yes, while you may not "notice" fuel starvation, that doesn't mean it's not happening. There are rich and lean thresholds that the engine will run under. It's possible that your system provides enough fuel that the engine doesn't nose over, but without a wideband, you can't really tell if the engine is singing WOT at 5000rpm while having a 14-15:1 AFR either.

But my point is that if it's not broke, why fix it? If you wanted to move to EFI, you'd pretty much be forced in this direction. If your intention is to keep the carburetor, there's less of a need here, especially if you aren't having any fuel starvation issues.

[Jay S]

I think the Red Holley street pumps are quieter than they use to be. The higher pressure Blue and Black pumps are still noisier though. I would not put a Carter pump to feed a Robbmc, the Carter is a little smaller pump than a Holley. The Holley Red matches up better to the Robbmc.

I have check valves to bypass the Carter pump, which is a kit you can buy. The Carter pumps seem to have the vanes not draw in as easily as the Holley’s for running on just the Mechanical pump.

I just helped a friend put on a Holley Red in series with Carter strip/street Mechanical pump. His electric pump is just on when he arms the NOS system. Otherwise it runs on the mechanical pump all the time, it has 3/8 line, 550+ HP.

[jhein]

Originally Posted by JLMounce

No, I run a FiTech system with an in-tank pump. The EFI controls everything having to do with the fuel system. If the engine stalls, the fuel pump is shut down.

And yes, while you may not "notice" fuel starvation, that doesn't mean it's not happening. There are rich and lean thresholds that the engine will run under. It's possible that your system provides enough fuel that the engine doesn't nose over, but without a wideband, you can't really tell if the engine is singing WOT at 5000rpm while having a 14-15:1 AFR either.

But my point is that if it's not broke, why fix it? If you wanted to move to EFI, you'd pretty much be forced in this direction. If your intention is to keep the carburetor, there's less of a need here, especially if you aren't having any fuel starvation issues.

And that's the thing. With no O2 sensor I have no idea. Plus you guys all correctly predicted the future with the 18' wheels and suspension. As you now have said, maybe soon I'll have a sniper TBI sitting on top of a Torker II or something like that.

[R 70 Judge]

Originally Posted by jhein

And that's the thing. With no O2 sensor I have no idea. Plus you guys all correctly predicted the future with the 18' wheels and suspension. As you now have said, maybe soon I'll have a sniper TBI sitting on top of a Torker II or something like that.

Modifying your car to the way you want it is the fun part of this hobby! I think a Holley sniper would be great. I’d choose a northwind over a Torker II though. You can still use the shaker with the northwind btw. You just need that drop base deal.

[Singleton]

Originally Posted by jhein

I don't know but people have suggested that even if I don't have any obvious starvation, it's still happening. I don't know if that only matters for someone who is racing or if would have any noticeable effect in a street only car like mine.

My GTO, (in signature), had the 550 RobbMc mechanical pump for several years with no noticeable fuel supply issues. Also used the RobbMc 1/2" tank pick-up along with 1/2" lines.
About two years ago. frustrated with the same issue you're describing with the empty fuel bowls, I decided to ditch the mechanical pump and went with the Tanks Inc setup with the in-tank 450lph pump and 1/2" supply and return. Used a cheap quickfuel bypass regulator plumbed-in after the carb, no hobbs switch.

I didn't expect any performance gains, since the car ran really strong on the street with the M&H drag radials, 495cid, 4sp, 4.10 gears. But after the electric pump install I was shocked at how quicker the engine pulled to redline. Like I said before, it ran great on the mechanical pump, but there was a noticeable difference after the Tanks Inc set up.
So the dry fuel bowl issue is solved and a slight fuel starvation issue that I didn't know about is also solved. And if I decide to go EFI, most of the components are already in place

[jhein]

Originally Posted by Singleton

My GTO, (in signature), had the 550 RobbMc mechanical pump for several years with no noticeable fuel supply issues. Also used the RobbMc 1/2" tank pick-up along with 1/2" lines.
About two years ago. frustrated with the same issue you're describing with the empty fuel bowls, I decided to ditch the mechanical pump and went with the Tanks Inc setup with the in-tank 450lph pump and 1/2" supply and return. Used a cheap quickfuel bypass regulator plumbed-in after the carb, no hobbs switch.

I didn't expect any performance gains, since the car ran really strong on the street with the M&H drag radials, 495cid, 4sp, 4.10 gears. But after the electric pump install I was shocked at how quicker and stonger the engine pulled to redline. Like I said before, it ran great on the mechanical pump, but there was a noticeable difference after the Tanks Inc set up.
So the dry fuel bowl issue is solved and a slight fuel starvation issue that I didn't know about is also solved. And if I decide to go EFI, the components are already in place

That's great info. Thanks.