[SBCDOWNUNDER]

350Chev- Can anyone help on a horsepower estimate? for
350Chev- Can anyone help on a horsepower estimate? for
-sbc 350
-0.040" overbore
-ACL flat top cast pistons, 9.0:1 compression (Australian Fuel is of Low Octane Type), Moly rings
-Stock conrods
-Stock 2-bolt crankshaft
-Clevite Bearings
-Balanced Bottom End
-307 heads, very mild port polish / cleanup
-fuellie 2.02" int 1.6" exh valves, valvespring tension unknown
-Crow valvesprings(tension unknown), Crower collets and retainers
-Mellings High Volume Oil Pump
-1.5:1 Roller Rockers
-ACL Monotrque Head Gaskets
-Stock pushrods
-Cam Dynamics 0.465int 0.488 exh, .050" dur 224 int, 234 exh, adv. duration 290 int, 300 exh, Hydraulic Tappets
-Holley Street Dominator Intake Manifold, Match Ported
-650cfm holley mechanical secondaries
-MSD Billet Distributor, with Blaster 3 Coil
-Top Gun Race Series 10mm Leads
-Holley Blue Electric Fuel Pump, with Surge Tank Setup and Regulator
-Pacemaker Headers
-Rollmaster Double Row Timing Chain
-K & N air filter

Any estimates on how much power I could probably expect?
Cheers,
sbc downunder

[NathanK79]

I'd need more info on the heads, but I'd guess at the most around 300 or 350 at the flywheel if it's tuned right. Only a dyno will tell.

[SBCDOWNUNDER]

Thanks for your reply mate. Unfortunately, I don't know what year the heads were manufactued, but I know a light deburing was carried out of all factory casting, and the exhaust and intake chambers have been opned up a little. CC figures are also unknown. What would perhaps be an economical head upgrade you would recommend for someone with a low budget like myself? I was hoping to perhaps look at 280KW, as at the moment, my estimate was around about 350hp / 260kw also.

Cheers

[NathanK79]

First off--just out of curiosity--is KW kilowatt. That makes sense, but I wan't prepared for that. Oh well, I learned something new. Anyways, an economic way to get some ponies would be to have a three or four angle valve job done. I've even heard of a five. This will greatly improve flow where it's needed most, when the valve is shrouding the port. Also, if the valves will handle it without binding, you can squeeze some more lift out of your valvetrain with some descent 1.6 rockers(but you just bought the 1.5's). However, the most economic purchase you can make for performance out of the box is a set of Edelbrock Aluminum heads. They're ready to go and they're around 900 bucks, so 1800 pounds....is that right? I thought a pound was about two dollars American. To tell you the truth though, I'd stick with the heads you've got and see where they get you. I didn't realize what work was done on them before. You will be happy with the valve job though. Later on. Good luck.

[SBCDOWNUNDER]

Thank You for your help. Much appreciated. Will take your advice strongly. And your money conversion is about spot on.

Thank You, and Good Luck in you're future.

P.S. KW does stand for Kilowatt in this case.