OK the motors coming out soon, any suggestions on fuel tank modification for 500+ HP motors.
I have early 71 with aluminum fuel tank
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install a bigger filler neck!
lol.................
George
lol.................
George
Seriously,
1/2" tubing or hose from the tank to a high volume mechanical fuel pump. At least 3/8" tubing or hose on the discharge of the pump to the carb, splitting into 2 separate Fram G15 fuel filters, one for each fuel bowl (Holley or Demon). Remove the small fuel filters from the inlets of the carb.
Tubing is preferred over hose, it provides less restriction to flow, use as little hose as possible. Only smooth bends in the tubing, no 90 degree fittings.
The fuel pump needs to flow at least 45 gph at 4.5 psi at 6000 engine rpm, to support 500 bhp. This is different than the free flow rating.
Some of the vendors should have a banjo fitting to replace the plug on the bottom of the tank, which will give you a method to connect the 1/2" hose to the tank. Let me know where you find the banjo fittings, I need one too.
George
1/2" tubing or hose from the tank to a high volume mechanical fuel pump. At least 3/8" tubing or hose on the discharge of the pump to the carb, splitting into 2 separate Fram G15 fuel filters, one for each fuel bowl (Holley or Demon). Remove the small fuel filters from the inlets of the carb.
Tubing is preferred over hose, it provides less restriction to flow, use as little hose as possible. Only smooth bends in the tubing, no 90 degree fittings.
The fuel pump needs to flow at least 45 gph at 4.5 psi at 6000 engine rpm, to support 500 bhp. This is different than the free flow rating.
Some of the vendors should have a banjo fitting to replace the plug on the bottom of the tank, which will give you a method to connect the 1/2" hose to the tank. Let me know where you find the banjo fittings, I need one too.
George
I have looked but not seen any fittings on the tank bottom. seems like maybe welding a fitting in the tank bottom would be better than the top fuel draw. Only draw back is it may pick up more debris than a top draw. Thats where a good filter may be beneficial between the pump & tank in addition to the ones mention by George.
Three filters may be restricting the fuel delivery a little to much.
Has anyone else did any fuel pick up or tank modifications there are a lot of 500 HP Panteras out there.
Im going to use the mechanical pump instead of a electric unit.
Three filters may be restricting the fuel delivery a little to much.
Has anyone else did any fuel pick up or tank modifications there are a lot of 500 HP Panteras out there.
Im going to use the mechanical pump instead of a electric unit.
George - And what would your recomendation be if your motor is making 600-650 hp?
MICRO-CONTROLLED GAS GAGE LINEARIZER This article was published in the POCA newsleter last year. I contacted the engineer that wrote the article, and purchased the unit. If you modify the sending unit you will get a full reading from E to F. and the gauge will be linear. It works great, nice to know exactly how much gas I have. Just an idea.
Mark,
The pump will pass small debris with no problem, it isn't designed to operate with a filter on the suction, I think a filter IS a good idea for the first tank or two, just to catch all the stuff that has collected in the tank over 30 years, but after the first couple of tanks of gas remove the suction filter.
Of course, if you remove the tank from the car, you can just flush the tank while it's out and then you won't have to install a filter on the pump's suction at all.
Chris, 650 bhp will need a pump that can flow at least 55 gph at 4.5 psi at 6000 rpm. I always suggest a mechanical pump for safety's sake, plus they are quieter, take up less room and there are no plumbing hassles.
The plumbing can remain much the same as I explained it to Mark, but I would suggest you use 1/2" tubing on the outlet of the pump to where it splits to feed the individual carb fuel bowls, rather than the 3/8" tubing I suggested to Mark.
Holley sells a better variety of pumps for the Windsor motor than for the Cleveland, plus there are NASCASR pumps available from Carter for the Windsor motor.
your friend on the DTBB, George
The pump will pass small debris with no problem, it isn't designed to operate with a filter on the suction, I think a filter IS a good idea for the first tank or two, just to catch all the stuff that has collected in the tank over 30 years, but after the first couple of tanks of gas remove the suction filter.
Of course, if you remove the tank from the car, you can just flush the tank while it's out and then you won't have to install a filter on the pump's suction at all.
Chris, 650 bhp will need a pump that can flow at least 55 gph at 4.5 psi at 6000 rpm. I always suggest a mechanical pump for safety's sake, plus they are quieter, take up less room and there are no plumbing hassles.
The plumbing can remain much the same as I explained it to Mark, but I would suggest you use 1/2" tubing on the outlet of the pump to where it splits to feed the individual carb fuel bowls, rather than the 3/8" tubing I suggested to Mark.
Holley sells a better variety of pumps for the Windsor motor than for the Cleveland, plus there are NASCASR pumps available from Carter for the Windsor motor.
your friend on the DTBB, George
This Cleveland pump will work on a 650 hp engine. (155 gph @4.5 psi).
http://www.robbmcperformance.com/15001/45301.html
http://www.robbmcperformance.com/15001/45301.html
Robb,
both Mark & Chris are involved with stroker motors based on a Windsor block. I don't believe you offer a Windsor pump, hence my Holley & Carter recommendation.
I can assure you I will steer owners building up "Cleveland" motors in your direction. I like to support manufacturers who develope products for the Cleveland engine any way I can.
George
both Mark & Chris are involved with stroker motors based on a Windsor block. I don't believe you offer a Windsor pump, hence my Holley & Carter recommendation.
I can assure you I will steer owners building up "Cleveland" motors in your direction. I like to support manufacturers who develope products for the Cleveland engine any way I can.
George
Couple things I might add.
What about a small in line strainer before the pump right out of the gas tank for a permanent installation because as us Mechanical Backrounded people know pumps push not pull, so a strainer is less restrictive then a filter. I learned a big enough piece of debris could jamb and ruin a electric pump. As we know on big pumps in industrial applications we use what is called a suction diffuser. This devise is a strainer which filters out debris which could damage a pump impeller and AIR BUBBLES. A small inline strainer with a pet cock to perge out the dirt is what I have run on my race cars.
That Mechanical Pump for the Cleveland is great, but is there any motor out there that could flow 155 gph ??? Sounds like I could use that on the heating system in my house, ? LOL
3. With those flows 4.5psi at 55 or 155GPH 1/2 ID tubing is a lot of fuel.
My 2 cents ? 1/2 ID from the tank to the pump, 1/2 from the pump to the regulator then split it to 3/8 to each side of the carb. Plenty of Petrol. Like George Said " install a bigger filler neck!"
Ok one more thing I have been meaning to try " Stainless steel on all the lines. There is a product called SWADGELOCK we use in our industry. Real nice stuff. Check it out. We use it on Gases and Purity applications. Not sure of the ups and downs of Stainless on a Automobile ?
Ron
What about a small in line strainer before the pump right out of the gas tank for a permanent installation because as us Mechanical Backrounded people know pumps push not pull, so a strainer is less restrictive then a filter. I learned a big enough piece of debris could jamb and ruin a electric pump. As we know on big pumps in industrial applications we use what is called a suction diffuser. This devise is a strainer which filters out debris which could damage a pump impeller and AIR BUBBLES. A small inline strainer with a pet cock to perge out the dirt is what I have run on my race cars.
That Mechanical Pump for the Cleveland is great, but is there any motor out there that could flow 155 gph ??? Sounds like I could use that on the heating system in my house, ? LOL
3. With those flows 4.5psi at 55 or 155GPH 1/2 ID tubing is a lot of fuel.
My 2 cents ? 1/2 ID from the tank to the pump, 1/2 from the pump to the regulator then split it to 3/8 to each side of the carb. Plenty of Petrol. Like George Said " install a bigger filler neck!"
Ok one more thing I have been meaning to try " Stainless steel on all the lines. There is a product called SWADGELOCK we use in our industry. Real nice stuff. Check it out. We use it on Gases and Purity applications. Not sure of the ups and downs of Stainless on a Automobile ?
Ron
For quality fuel and oil filters, check out Pure Power filter lines. I recently purchased one of their oil filters and am VERY pleased.