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#1
08-28-2007, 10:09 AM
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Falling off at launch...
..to follow up on other post, here is problem. At dead stop, in 1st car launches real good, up to about 5000, shift to 2nd, no problem, shift to 3rd, falls on it's face at about 4500, let off, hit it again, takes off. All this time was thinking I didn't have enough fuel, so I borrowed an electric pump and replumbed fuel lines. It did this with current Q-jet and I put a Holley 3310, same results. Now I find out from a friend that it may be to much pressure on Q-jet. Currently using a Holley 12-837 http://store.summitracing.com/partde...5&autoview=sku without a regulator. Gonna "rig" fuel pressure gauge up front to check pressure when car starts falling off. Thoughts? Kel
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'69 Pontiac 400 YA, .060 over, stock crank, 10.2:1 comp, CAT H-beam rods, HS 1.65 rockers, Crane cam 248/252 660 lift, Edelbrock 72cc heads ported 300 cfm, Performer RPM Intake, Ruggles 800 cfm Q-jet, Summit 140 gph electric fuel pump, 12 bolt 4.10 posi, 200-4R, Transgo HD shift kit, 2800 stall, aluminum radiator, 2" MadDog Headers, DMH 3" cutouts. 12.51 et @ 111 mph 
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