Well I sold my last one. And now its time to build what I wanted all along.
Shooting for a 383 ~600 hp and 10.5:1 to 11:1 compression
Ive already got a nice clean 4bolt main block. A th400 and misc other parts laying around.
Going with an eagle forged crank, and eagle forged H-beam rods. Some Forged speed pro pistons (+3.40 cc)
Also have a brand new MSD 6al igniton system for the car.
Now begin my questions, feel free to help out. Ill be reading up as I post here too.
As far as heads I was going to go with AFR 1068's (227 cc intake, 80cc exhaust, 65cc combustion chambers, 2.10 and 1.6 valves). Scorpion 1.5 ratio full roller rockers. Crower stud girdles.
And thats about all I have figured out completely. I have a few ideas for cams, but nothing set in stone, going to talk to the guys at bullet cams before i set my mind. Probably somewhere around 225 int dur at .050 and 265 exh dur at .050 with about 540 int lift and 563 exh
Now my main questions are, What intake manifold should I be looking at, could I use an Edelbrock Super Victor (http://www.summitracing.com/parts/ed...make/chevrolet) or should I go all out with AFR's Polymer (http://www.summitracing.com/parts/af...make/chevrolet) or other ideas? That and I have no idea what kind of fuel pump to use to feed this thing. Any input will be greatly appreciated. Or if you know where theres a decent Iroc roller near upstate ny.

 

Also plan for a cage. And debating with myself on doing a mini tub...

 

Anyone wanna chime in? Also don't know what size tires I should be running, or if a minitub is really needed...

 

Are your cam specifications listed correctly? The listed specifications are too low on lift and the intake duration is too small to make the 600 HP you want.

 

Those are just numbers I pulled from camquest. I havent talked to bullet yet.

 

what do you guys think, a 600hp 383 followed by a built th400 all backed by a s60, Do I need a cage? or can I get away with subframe connectors(inner and outer), watts link, STB and some kind of brace over the shock towers as well?

 

Where are you planning to drive this thing? The street? No way a track is gonna let you race without a cage. No way that thing is gonna be fun to drive on the street... have fun paying for race gas for street cruising...

 

Wasnt going to use race gas. And yeah was going to be a street legal car. Been batting around the idea of just supercharging it rather than having a huge cam... But Idk much bout boosting anything.

 

600hp is a lot for a factory block. You'll have wring it pretty high to hit 600hp naturally aspirated. You'd be a lot better off buying a 454 or something, it will probably be cheaper in the end.

 

You won't hit 600 NA hp unless you've got a really unfriendly motor. 550 is potentially doable, but you better have the perfect setup. 460-520 is more realistic in a street/strip combo, 410-450 being on very friendly street 383 builds. Oh, and that TH400 will rob some power as well.

600 is a big number. Most people can barely handle 400 hp.. Sounds great till the car nearly makes you crap your pants every time you barely put your foot on the gas... Not so fun to drive in traffic then, heh.

 

I've driven cars with about 450hp. All in all 400 doesnt scare me. 600 might, but there is only one way to find out. As far as streetable-ness, it'll only be used to show it off. Maybe a weekend ride or something. Also want to show these import idiots around here what real ***** are and how to build a car right. So I am looking to build something over the top, something no one else around here would do. Hence the 600hp small block chevy. Ive just got to run numbers on what a NA motor would cost over say a 383 with a 671 blower. Im pretty much dead set on it being a 383, Ive wanted one as long as I can remember. If I do go blower, I have some learning to do. all I know is how to build is a high compression NA. I know nothing about blower cams or anything related to that really..

 

blowers, turbos, and prochargers are cool and offer awesome power.. but for the amount spent - I'd take a NA 434 SBC, BBC stroker, or LS1/2 any day of the week. Anyone can make power with forced induction. If you're wanting to show up the competition, the best way to do it is to beat them WITHOUT a crutch.. not with one.

 

My original line of thought was something along those lines... Its just recently Ive been looking at blowers.... Thats where the idea for having a 383 with a huge cam in it came into effect. Then again, no one around here supercharges anything. Its mostly people with turbos, installed like ****. Make no mistake no matter what I end up doing, I am going to make it clean. And Id rather not do a BBC or LS swap because everything that doesnt have a turbo either has a bbc or an ls, theres a good reason for that and I respect the power both can make. But still. A nice,clean, caged, powerful IROC would be what I am aiming for.

 

Done some more thought and research on this... I think it may be better to use a 871...Still in the dark on what carbs though, Two holly ultra double pumper 650's too much or not enough? And do I have a shot in hell in fitting this under a 3" cowl? Tried finding pics of other cars but still not to certain... Ideas on distributors what for this as well... Was going to use a 6al system originally. should I keep my compression ratio a little lower, say 9.5:1 or 10:1 instead of the 11 I wanted? I dont plan on Running more than 10psi. I think with a fully forged engine it'll be sweet. Was talking with one of the few engine gurus I vaguely know, he said with a 383, afr 1068's, a 871 at 10psi and a cam like comp cams 290as-14 (.540 intake lift and .563 exhaust, dur @.050 int 255 ext.265) I should be making over 600hp closer to 680.. Anyone wanna agree or disagree?

 

If you want to fit something under a small cowl or even better the stock hood, go turbo. If you want to make serious power and still be able toa ctually drive it, turbo's are hard to beat. take zz3iroc 's car. Turbo TPI 350... thing is insanely fast and looks completely stock.

 

Yeah... I actually want to stay away from turbos and prochargers. Just a personal thing.

 

well the more and more I think about it and start to plan it out, a blower is just too much for a thirgen that I'd build. So I think Ill finally settle with 550ish hp 383. Anything over 500 is sweet but the bigger the better. back to a few lingering questions then "Now my main questions are, What intake manifold should I be looking at, could I use an Edelbrock Super Victor (http://www.summitracing.com/parts/ed...make/chevrolet) or should I go all out with AFR's Polymer (http://www.summitracing.com/parts/af...make/chevrolet) or other ideas? That and I have no idea what kind of fuel pump to use to feed this thing." And any guesses on what size tires I should be running?

 

Just cos them idiots drive imports doesn't mean they can't make the same power as you are hoping/going to make. It would cost a buttload more cash, but they don't care. Also they have no qualms about using one of those crutches you mentioned above.

With that being said, a 500 hp 383 is very doable n/a. Throw some NOS on it and you can make that magical 600 number plus some and you won't have to spin it so high.

I have a question tho. Why just build a 383? Why not opt for a dart shp block and build yourself a nice 421 or 434? An engine that size would really make better use of those 227 heads.

 

Since you all like the 434's so much, im trying to learn about them. http://www.dartheads.com/products/sh...l-block-3.html
is a good block to start with no? Particularly Part number 31161211

 

Be careful if you go with really big strokes because with some rod lengths and pistons you end up with a wrist pin through your compression rings.... not really the most ideal scenario for a 100k mile street car engine. Im sure some can make them work fine, but I've just always heard iffy things about it.

Building from a 400 block, even if it's only a 400, is a great idea, though, I think. Its only 17 more cubes than a 383, but the 4.125 inch bore will be a lot easier to make power with than a 4.000 bore. Of course a 454 will be a LOT easier than that. As long as you dont mind at least a small cowl and are willing to figure something out with the headers, the bbc swap is pretty easy. With an NA setup, the more cubes you get the easier it gets to make power and the easier it is to make power without having to hit 7000 RPM.

 

Yeah but I dont want the weight from a big block up there, might not be too much more than a full 434. But Im not putting a big Block in this. I want a small block. Any help with advice on 434's is appreciated though. Like I said Im just figuring out these things, im not even sure what kind of power i can expect out of one lol.