I'm running trick flow 185 cnc heads with a b303(would like to eventually change to an f cam). Pulls very hard on 6 psi, plan on going to 10 psi within a few weeks and taking it to the track to see what it'll do!
Keith Black hypereutectic Dome pistons 10.7 to 1 compression .060 over Holley 670cfm Street Avenger ProStar Aluminum heads 60cc chamber 210 intake runners 2.02 in 1.60 ext Comp Cams "Big Muther Thumper" .491 intake .476 Exh
What kind of hp estimates or ETs are you guys runnin? I know when Im bildng a motor i like all the info I can get.
Mine is a VERY fun 265 hp at the wheels at 5000 rpms, 280 ft/lbs from 3500 on up to 6000 (on a dyno with video to prove it ) So my estimate is 350-ish hp on the engine. Those are electrical hiccups on the torque curve, so ignore them.
Mine ran 13 flat @ 107 in the 1/4, pump premium, street tires, exactly the way I run it on the street. Top speed is 146 mph @ 6500 rpms
Mines an Isky solid lifter cam, Edelbrock heads, Holley 750 HP carb. Probe pistons and Eagle rods. Runs high 11's-low 12's depending on the weather.
should be around 400hp with single 4V not sure what the 2x4 will do, may drop it down but don't care looks sweet should sound good ran similar set up and ran best of 11:92 1/4mile
Just FYI: you've got the carbs on backwards for a 2x4 If they're not oversized, it'll do fine. Twin 390's will do you..
You lost 85 hp through the drivetrain? My combo is in my sig (and yes, I wish I still had my AFR 185s...)
From My understanding the small block 2x4 intake was designed to run carbs forward there also been dyno studies running carbs both ways resulting in hp and torque lost when carbs were facing the rear only 427 low rise ran revearse
You don't lose "25%" through the drivetrain. If that were true, a 1000 horsepower engine would lose 250 horsepower while a 100 horsepower engine would lose only 25 horsepower. There is definitely a loss between the crankshaft and the rear wheels, but to put a specific percentage on it that applies to all cars is totally inaccurate.
You'll have to wind the pee out of that 289 combination to reach 400 hp. Back in the early 70s a friend of mine ran a very similar setup. 289 with HiPo heads worked to within an inch of their life, Shelby LeMans cam and 2x4 bbl 660 center squirters, headers, big exhaust. Not long after getting it running he jumped on it and pulled the pinion gear right out of the differential, twisted the driveshaft like a pretzel, and broke three ears off of the T10...
