an le2 head/cammed 383 with say about a 125 wet shot, right now i have a single 255 walbro( still in the box) but when i throw n2o into the mix am i asking too much of the single in tank pump?

i can get my hands on a new areomotive a1000 pump for cheap, should i grab it or is it total overkill? i dont care about noise/not being stock looking or anything

oh and also i have svo #30 injectors, will they be big enough that i wouldn't have to upgrade? i plan on spinnin it to about 65-6700 but no higher

 

You size your injectors for normally aspirated flywheel HP. A rough guideline is that the minimum injector you should consider is flywheel HP x 0.07. Example:

500 flywheel HP x 0.07 = 35 #/HR.

If you are running a wet kit, it doesn't affect the injector size. The spray nozzle supplies the extra fuel. The pump does have to meet the total requirements though. Can't estimate minimum fuel pump size without knowing total HP.

 

right thats what i meant, injector size for just the engine sorry for wording that weird

so if we estimate im looking at 600-650 fwhp, is that pushing it on a single 255?

 

Sounds like my last years combo. I made 500hp flywheel....415RWHP thru a moser 12 bolt and stall.

I had 36# injectors and with a 75 shot they didnt get about 76% dutie cycle.

I would say get some 42s to be safe. Also you will be pushing the limits of the single 255, do 2 intanks like i am doing

Jay

 

thanks jay rich,

rather then buy another pump ill probably just return mine and pick up that a1000 ($150) NIB and just make a custom like fuel setup with all stainless line

 

I made 700rwhp with a 255 in-tank, stock lines and regulator. It is a big enough pump.

Rich

 

A 42 #/HR injector will not support 650 HP at the flywheel (at least not at the flow rated pressure). Minimum to consider would be about 48 #/HR.

As far as the pump, 255 LPH converts to 65.5 gallons/HR = ~405 #/Hr. Since 650 HP will take a max of 325 #/HR, you will have sufficient cushion with the 255 LPH pump to allow for a 20% recycle at max fuel demand. Just make sure the pump is rated to flow the 255 LPH at 43.5psi or more.