I was gonna suggest an article about building two budget 500 HP GM small blocks; a 350 with a large roots blower running low boost of 5 psi or less, and a naturally-aspirated 383. I wanted to know how the costs and performance of each compared, but the Big Power from a Little Blower article in the September issue covered the first option very well, even though it uses a small blower. It sure seems like it would be hard to beat the torque curve produced by that set up, but I'd still like to see what you can get from an unblown 383 for about the same cost.
is 5 grand really cheap anymore?
I mean sure...I could go out and drop 13k on one of those SBC 454's...but thats ludicris.
A budget build in my book is half of that 5k cost....so about 2500-2600....I know that can be done.Id just like to see how theyd do it.
cheap out all the parts one can.try building a 500hp beast from swap meet parts...thatd be cool.
500 HP Super Chevy 383ci High School Hot RodAFR Street 195 CNC Competition Heads9.4BG Silver Claw 750 Carb. with 75/83 JetsMSD 85551 Distributor 36° TimingComp Cams 12-433-8 Hyd Roller Cam1 3/4" Headers93 Octane Pump Gas
ya a parts bin engine that wouold be cool but you'd have to go to alot of swap meets in your state and make some flyers of stuf your looking for
on that list. that would be your only option of what your looking for
could you give me an estimate on what the crank horse power and torque would be for this combo, me and my dad are building this, it is a present to me from him, and he picked out the parts but only has a vague idea of what it will put out and i just wanted to know if you could tell me a little more specific. hanks
1979 chevy 350 bored .040 over
dart pro 1 200 cc heads with the .550 lift spring kit
probe forged full floater pistons 10.7:1
eagle cast crank
h-beam rods forged all balanced (crank, rods, pistons,)
lunati 07103 cam flat tappet
edelbrock victor jr port matched intake
quick fuel tech 750 cfm double pumper
crane 1.5 full roller rockers
1 5/8 headers
25% underdrive pulleys (march)
Mallory hyfire VI cd ignition box
comp 9000 mallory distributor w/o vacuum advance
some other things that wont make hp are pioneer flex plate and balancer, 8 qt oil pan, he also bought a performer nitrous plate system but he wont tell me what it is capable of, i believe 100 hp or so.
all on 93 octane gasoline
First you need to look up the cam spec's yourself and list the spec's, second you need to have your facts straight-it's a flat tappet hyd, not a flat tappet, wasted time looking it up in the wrong catogory of the cam catolog. Now if you look at the examples of 383 given, the difference between most of them is the cam. So looking at your cam-
I had a similar setup on a 350, with no overbore and about 10:1 compression, in a '68 Camaro. I didn't get it dynoed, but with the headers open, 4.11 gears, and using 8" M/T slicks it ran a best of 12.27 at 114 mph. The trans was a TH400 with a B&M Tork Master 3000 torque converter.
The cam I had was a Lunati with close to the same specs as yours. Mine was a Bracket Master II 00012 hydraulic flat tappet. Duration @.050 IN/EX: 246/246, with .515"/.515" valve lift and a 108 lob separation angle. With the 1.6 Crane roller rockers I was using the lift came out to .549". The heads were TrickFlow with 195cc intake ports. Intake was an Edelbrock Performer RPM and the carb was only a 600cfm Carter AFB, with a 1" spacer under it. I also modified the ports on the heads and intake manifold to match the gaskets, but the Victor Jr. and 750 carb you're using would've been a better match to my heads and cam.
With all the overlap from the 108 sep angle, the cam was pretty radical, and plenty of cam for a 350 that was driven on the street. That's the reason I kept the carb and intake small, but you'll have better top end power than mine with your setup.
Check the exhaust port size on your AFR heads. I think you'll need bigger headers for those ports. Probably 1 3/4, or at a minimum try to open up the ports on the 1 5/8 header flanges to match the AFR exhaust ports.
With the .040 over, bigger carb, and the Victor Jr., your motor should be a strong runner. In my '68, that would've put it in the 11's for sure.