193heads

Hello guys this is my first post on this forum
Here's what I have stock 350 roller block that came in my 1987 firebird formul 350. 193heads ported headbytes style, an edebrock eps intake ported to felpro 1205, edelbrock 600cfm carburetor, hooker shorty headers ported to 1 1/2 inches, comp cam magnum 280hr cam 0.525 lift and 224 duration @ .50 lift. The y pipe is that junk flow tech for now into some hooker muffler. For now. Thanks guys

AlkyIROC

150-300hp

If you really want to know the HP, put the engine on a dyno.

If you have the total weight of the vehicle including the driver plus the MPH it will do in a 1/4 mile, HP can also be closely calculated.

The 193 casting is a truck head designed for torque and an operating range below 4000 rpm.

That's a lot of camshaft. Have you checked piston to valve clearance? Have the heads been set up for that much lift? Recommended valve springs, retainer to valve guide clearance etc? Roller rockers? A big cam like that should also be uses 2.02/1.60 valves.

1-1/2" headers are very restrictive for 350 and larger unless used strictly as a street engine and that's a little too much cam for a basic street engine.

In the end, you can slap together any combination of parts but that doesn't mean the parts will all work together to be efficient in making power etc. It will run but not perform as well as a properly put together engine.

Don't be disappointed if performance isn't what you expected. At least it still going to be better than a 305.

193heads

Thanks for the reply. I know the 193heads are off a truck. I just wanted to give porting a pare of heads a try. The valve seal to retainer is. 680 so the .525 lift is fine. The piston to valve clearance or pv I still have to check. But that has mostly to do with cam duration: not lift. And setting as it's below 230 @ .50 of lift it should be fine. But I'm going to check anyways.
Like I said the heads are ported headbytes style. Have a look at him on YouTube the guy is great help with diy guys. Also the porting on the hooker headers are the inside diameter.they're the same 1 5/8Hooker shorty headers everybody else runs, Just ported out to be larger inside become there welded from the inside off the header flang. Any ways I have over 22 hours of porting on these heads plus a 4 angle valve job. 191 heads came in this car so basically the same heads. So maybe 150/300hp out of an engine that's rated at 210hp with no headers worse heads and way smaller cam. May be off a bit. Or alot..

Fast355

iTrader: (2)

I feel you will be over 300 hp and maybe 380-400 lb/ft of tire smoking torque. I generally use a Crane 272H10 or Comp Hi Energy 268 for this setup. 1 1/2 primaries are also not an issue until you get up over 350 hp.

193heads

Thanks for the reply fast355.

193heads

I just had my cousin run my build on desk top dyno. 362@5000, 415@4000 as soon as I get this beast running I'll have to find a chassis dyno.

RS Chris

Please tell me you didn't have that clown do your heads. He does notoriously bad and sloppy work.

193heads

sofakingdom

iTrader: (1)

Yeah, just mention anything about swirl-port heads, he'll jump right in there and tell you what you want to hear. Mention anything about "van" and all of a sudden it becomes Heaven's ultimate gift to man.

Go on hallucinating that he's telling you something even randomly related to reality, then weep when you take it to the track or the dyno.

Fast355

iTrader: (2)

Put down the bong! Quite honestly just about everyone that has run the swirl ports in the application I have suggested them has LOVED them for what they are. Most of these cars running a stockish setup have 2.73/3.08 gears and the lowest stalling torque converters known to man with transmissions that only shift 4,000-4,500 rpm at wide open throttle. Until you rebuild the whole car and ditch most of the stock crap, the swirl ports do quite well. Dyno Don ported a set of 193s and put down something in the neighborhood of 250 RWHP with only a LT1 cam and a stock TPI setup. There was another guy thats name escapes me that had a very mild cam in a TBI 350 from a Caprice or a Truck that ran well into the 13s in the 1/4 with the swirlies.

D_Smith87

Any cfm numbers on the heads? In stock form a tbi head can support like 325 horse at peak power levels due to its 170 cfm intake ports, if you had your heads flowed on a flow bench i could get you a real life ball park estimate