vortech supercharger fuel supply

[mr. xcesve]

Hi everyone,

I am in the process of a frame off on my '55 210. I bought a Shafiroff 406 small block for it, a tremec 600, and yes, a vortech V1 T Trim underhood supercharger to propel my street driven car from the 12's deep into the 11's. Anyhow, I seek wisdom on fuel system supply. I was wondering if 3/8" aluminum tubing would be adequate for a supply line to the carb. I am planning on also running a 3/8" return line back to the tank. Fuel pump is a Holley "Blue" pump, with a Fram cannister filter before it. (15 PSI capable, and there is a boost referenced fuel press reg) I am shooting for about 6-8 Lbs boost, probably 600 rwhp. to give you an idea. Car is being primered today in the shop (after a year of metalwork) and should be back together for spring. check it out: http://www.chop-shopcustoms.com/current_work/55Chevy_Danek/55Chevy_Danek.htm

[the4x4pig]

3/8 is prob fine though I would check with vortech and or holley. I'd rather have too large fuel line than too small.

[Dave R]

I run a YS trim V-7 (just above the T trim) on a 347 with -10 feed and -6 return lines and dual pumps. Then again, I'm looking at around 15-18 psi of boost too.

The 3/8 line would be OK provided you're not at full throttle a whole lot and the pump or pumps you use can push the fuel. I don't remember what the holley's do but you would probably need to have a pump capable of 70-80 psi at about 260 lph for around 600 hp. Bigger would be better. I'm only looking at 650rwhp and run twin (parallel) pumps of that caliber and I'll be feeding each cylinder bank with it's own pump soon enough.

I'm assuming you're intending to reve it up around 6500 or so? Any more and you will definitely want more fuel.

If it were me, I'd go 1/2" with a 3/8 return. I need to upgrade my return soon.

Good luck.

Dave

[Old Buzzard]

"Fuel pump is a Holley "Blue" pump, with a Fram cannister filter before it. (15 PSI capable, and there is a boost referenced fuel press reg) I am shooting for about 6-8 Lbs boost, probably 600 rwhp."

I'd suggest a visit to this site, before you use a Fram filter. The Robb Mc filters are what I use.. They flat work, and have sufficient micron rating and flow, to handle your engine requirements. [The Fram may create flow restriction, when used as a pre-pump filter.] Pre-pump filters are generally in the 40 to 100 micron size, to catch the "boulders", with a 10 micron at/near the engine, as a final filter.
Robb also has some trik fuel pumps, that you may want to look at.
Lastly, I think that the Blu pump will be on the ragged edge. Forced induction engines tend to have a higher BSFC, and thus need more fuel/hp. IE: we use .62#/hr for forced, and .5 for N/a apps.
IE: at 600rwhp, the FWHP is going to be near 700.[Fuel system requirements are calculated using FWHP, not RWHP.]
@ 700, the engine will require .62x700 = 434# fuel/hr. The pump will have to operate at base pressure, + boost, so be sure any pump you choose, will provide the volume at the psi the system will actually see.
I use the same size return as the supply. I also make sure that the return is as far away from the pick up as possible.
1 last suggestion: Monitor the fp, and BE sure it keeps up w/ boost, # for #...
http://www.robbmcperformance.com/products/dowels.html

My story, and I'm stickin w/ it!!:D