I am considering a front accumulator tank due to a rear-mounted cell with a belt-driven fuel pump. Or, may relocate the cell in front of the pump. I expect the "Roughly Square" S-10 will run in the 6.20 range, 1/8 mile. Around 1.35 60'
For those of you running this setup, let me hear from you. [PS, APD Methanol carb]

I have three door cars with rear cells and belt drive pumps. My vega being the fastest at 1.27/5.77 we have no problems even running 1/4 mile. I choose to filter after the pump for better supply to the pump.

Larry I have a 1.5 gallon front surge tank on the s10 but I am running Ron's Injection not a carb. It was the best option for me because I did want the extra weight out in front of the radiator, plus the expense of building the mount for it
I know several running internal bypass belt driven pumps with a rear mounted tank and alky carb without any problems. If you can keep the pump at or below the bottom of the tank so it gravity feeds I cant see a problem. I would run a #10 line from the tank to the pump and make sure the tank is well vented

I also have an 3 quart Moroso accumulator mounted between the crankshaft and the radiator. I had to reduce the length of the belt drive mandrel (vacuum pump and alternator belts) to clear the tank. It was actually a puzzle figuring out the correct shims, bolts, belt sizes and brackets to get everything to line up again.

Not a lot of fun, but everything lines up.

Bob

This has been argued few time here. I am in the front tank needed. Maybe other have gotten by w/o most being carb. Not sure why different but seems carbs don't need it.

I burned up two pumps on my nova before I installed front tank. Never had problem afterwards.

I do believe if have pump mounted low and below tank level it helps too.

option 3, put the pump in the back and run a cable to drive it. (pretty pricey) https://www.alkydigger.net/cat...man_Cable_Drive.html

quote:

Originally posted by wideopen231:
Not sure why different but seems carbs don't need it.

Because carbs have bowls that give it lag time if the pump slows slightly or has a small hiccup. Lots of people running belt drive pump with tank in the back and carburetor. You do need to really pay attention to not having restrictions to the pump.

quote:

Originally posted by CURTIS REED:

quote:

Originally posted by wideopen231:
Not sure why different but seems carbs don't need it.

Because carbs have bowls that give it lag time if the pump slows slightly or has a small hiccup. Lots of people running belt drive pump with tank in the back and carburetor. You do need to really pay attention to not having restrictions to the pump.

I Had two pumps go bad with rear tank, No restriction between pump and tank if anything had too big of line for need. I figure carbs have less demand on pump and take on less fuel which keeps pump wet even if hiccup as stated.Injection on other hand has more flow although good amount returns.If hiccup pump can have dry spell and at 4000 pump rpm minor amount of time could start wear since fuel is only thing lubricating it.

Never had bracket car with data logger till now and not sure a small dry spell would even show. I do think having return to bottom of pump would be good idea also. Can not say about other pumps but know Enderle have always been bad about eating cover if go dry at all.

larry no matter how many have pumped from the rear my opinion is build a custom cell to fit in front.when i do this i can normally find all the aluminum i need at jennings for pennies.that way you can build it to fit the space you have.no fuel issues that way

Put tank up front….

Motor does not care if it is a small surge tank up front or full size tank up there if it is designed right. With a belt driven pump the fuel tank (Surge Tank)should be in front and up higher if possible. On some cars like front engine dragsters or altereds it may not be possible to put tank up higher than the pump. It will still work just not optimum. Some people have used rear mounted tanks with mechanical pumps up front and it worked for them, others were not so lucky. The further away you get from optimum more likely you are to have problems so may as well design it right to start. I believe the surge tank should be large enough for all the fuel for one run plus about half again or more for safety factor. I would put a baffle on the return line inside the surge tank. You can have larger tank in back and and smaller fuel pump to keep surge tank full.

Even with electric pumps they do better at pushing fuel than sucking. So it is best to have pump lower than pump and behind the tank.

For both mechanical and electric pumps usually better to have filter after the pump so it does not create and restriction or suction.

What ever you are working on Carb, injection, surge tank or what ever I firmly believe you need a return type system so fuel pump runs at lower pressure and moves more volume of fuel. This keeps fuel cooler and uses less energy and does not burn up pumps as quickly. Very possibly why WIDEOPEN burned up 2 electric pumps may have been Deadheaded?

It really all comes down to what you want. Looks like you are wanting to keep the Tank (and Weight) in the rear and still have optimum fuel to motor. So do you put a surge tank up front with a full size tank in back and electric pump to feed surge tank or simplify system and move it all up front and deal with the weight problem? Part of decision there would be what you already have as far as tank, pump and lines, weight distribution, how much room you have and how complicated or simple you want it to be.

Thanks to everyone for the feedback. At this time, my plan is a three-gallon cell in front and a small radiator. I have enough room for both. The core support opening area is 31 x 17, so I can work something into there. Also, I have the complete APD fuel system, all new, fuel log, return style regulator, pump, and carb. When speaking with Troy Morgan, who has a Monte Carlo that lifts its wheels nicely, runs in the 6.10s range, his data logger showed a slight dip in fuel pressure at the top of the wheelie. Adding a surge tank cured the issue. I expect the "Roughly Square" S-10 to wheelie, so it's best to correct this before it becomes a problem.

IMO look at it this way. It is just insurance. could save from having issue is upside. If not looking to cut every once there is no down side.

quote:

Originally posted by CURTIS REED:

quote:

Originally posted by wideopen231:
Not sure why different but seems carbs don't need it.

Because carbs have bowls that give it lag time if the pump slows slightly or has a small hiccup. Lots of people running belt drive pump with tank in the back and carburetor. You do need to really pay attention to not having restrictions to the pump.

Correct. Works fine with most carb applications though I don't know about +1000 hp apps.
An MFI with a lag, drop, air gulp is a bad day.
In both cases a front mount tank eliminates any question and allows G forces to help keep the pump packed.

Dave, I agree. Front mount tank is the BEST way.