Dslayer9009

Ok, im new to this forum making. im building a 383 stroker for my 82 camaro. i have about half of the new parts for the engine and im having trouble with the rest.

First things first this is what i have: 350 block 4 bolt main
scat 5.7 I-beam rods
Scat Series 9000 Cast Pro Comp Stroker Lightweight Crankshafts 3.75 stroke, internal balanced
and i have a summit cam and lifter kit Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 284/284, Lift .480/.480, Chevy, Small Block, Kit
I plan on getting AFR 180cc Eliminator Aluminum Heads. 64cc exhaust runner. 2.02 intake valve and 1.6 exhausst valve
Holly 650 double pump mechanical secondaries
Weiand intake

Second thing: i plan on having a street/strip car that runs on pump gas so i want a 10:1-11:1 compression ratio. is that an ok cam to have or what kind of duration and lift should i have out of a cam?

Third thing: any suggestions to change carbs or heads or anything. its ganna be in front of a 700r4 tranny and 3:73 posi rear end.

never built a engine before so i just want to make sure i have all my parts blend together the way they should for max performance. thanks for everyones suggestions.

DeltaElite121

Big mismatch. That cam needs to go if you intend on making any real optimization for a good set of heads. Don't buy any more parts until you do some thorough reading with a budget and goal in mind. This probably sounds condescending but do they take it that way as that is me giving you an honest answer. LOTS of ways to waste money with cars.

Dslayer9009

thats ok. ive never built an engine before and ive done alot of research. obviously not enough lol.

Red Devil

Oh... my...

Might I suggest, purely for your own sanity's sake, that you attempt a typical engine build first? Jumping into the wonderful world of building engines.... a 383 just isn't the place to start. Not unless you have an abundance of cash, in which case, I'd farm out the build.

Night rider327

iTrader: (13)

I wouldn't go over 10.5:1 compression on our pee water fuel.

AFR is great heads, but for a 383 I would go with the 195cc port heads

That cam has to go. Very old profile, leaves a lot of power behind, not the right match for your parts, etc.

I can't recommend a cam un till I know for sure what compression and heads you go with, but I will say I would look at a dual pattern cam with 5-8* split in duration, LSA in the 108 - 110 range, and get lift way up. Closer to .600" the better with heads as good as the AFR, and you .050" lift duration should be much bigger... In the 235-250 range (again can't say for sure until I know which heads and compression you pulled the trigger on)

I would also use a 750 cfm carb on this one for sure

And put at least a 2800-3200 rpm stall converter in with it.

Dslayer9009

Thank you Night rider327. i was going to go with 180cc heads because then i dont need a bigger carb for the extra flow and because after research alot of people say they get more horse in the 2-5000rpm range and that was what i was looking for.
Are BluePrint Aluminum heads cheaply made? i always see complete ready to go blueprint engines for sale i didnt know if that was another knock off chinese part or if thats something worth looking in to
And i understand now when people say the cam is the last thing you get for your engine. i planned on putting a 3-3500 stall converter in it also.

i think a 10:1 compression is what im ganna shoot for. im not trying to shoot down anyones suggestions i just need input from people that have done many engines before.

Night rider327

iTrader: (13)

IMHO stay away from cheap brand heads and heads you have not heard of much.
Heads is the #1 place in your engine to make the biggest power/gains. I tell everybody spend half of your engine budget on your heads and you will get great results.

Only aftermarket alum. heads I really recommend are AFR, Brodix, Dart, Pro filer, RHS, jegs house brand (made by pro filer) and summit house brand (made by Brodix).

I run Brodix IK 200cc heads on my 355, my dad runs Brodix IK 180cc heads on his 337 (.060" over 327)

When doing your research on head sizes keep in mind that engine size, compression, and stroke will change how the same head acts. The 383 is a big engine with a longer stroke. The longer stroke is gonna make more torque at all RPM levels from idle to peak point vs. a 350. The 383 ci. size can take, and needs more head.

180cc heads on a 383 will hold you back, that's the size you would want on a mild 350-355 engine.

Think about the port size on stock heads.
L98 alum heads are 156cc,
vortec 350 truck heads are 170cc.

The cam is the major thing that 'sets' your powerband.
I mean it all does, from the stroke, bore, compression, size, heads, etc but the cam will have the most impact on the powerband.

HINKSON AUTO

I have run 180CC SHP Dart heads on 383's with great results, A Marine build a few months ago it was only 9.1 compression and the cam was on a 112 Lobe sep. It still made 479 torque and 452 horse. That being said Same engine with those heads 10:8 compression same .573 lift HR on a 108 Lobe sep you might have seen low 500 horse and 500 ish on the torque.

Here is that build.
https://www.facebook.com/cncblocks.n...28320384014477

I would go with a HYD roller lifter cam at a minimum and use lifters with a .750 wheel not lifters with a .700 wheel

If you are only going to run .480 lift cam go with a 180 heads

If you go with a cam near .600 lifter either a 180 or a 195 runner head would be a good choice.

If it were my build the 6.000 rod 383 seem to work the best, lighter pistons, less rod angel, less friction ETC.

Some key advice don't cheap out on machine work in the end it will cost you torque and HP.

Go to a shop that know there way around performance engines and have good equipment, Line hone, square deck to zero and most import IMHO is plate hone with a good hone. I have seen more guys spend good money on bad because a performance engine was build at the local jobber shop they did not have the proper equipment to do the job right in the end there money was wasted.

On rods make sure you buy the Scat stroker rods with the 7/16 bolts so you wont need a reduced base circle cam.

Good luck on your build
Carl

2005Impalla

I think the 180 heads with the cam you chose would be fine and make a lot of torque if you’re looking for a street motor, but I would switch to a vacuum secondary 750 carb and I think the 195 heads would make a little more HP as well as allow for a larger cam in the future if you wanted more power later.
How much HP you looking for?
If your 383 kit has forged piston and your looking to build a hot street/ strip motor that your not going to drive a lot I would run a larger head like there 195 heads or something else in the 200cc range. I would also get a cam with about 10* more degrease of duration and a little more lift, .500+ and a 750 double pumper carb with a single plane intake. Keep your compression around 10:1, I would not run 11:1 on pump gas unless you’re going to run a cam with around 114 LSA and I would not run a 114 LSA. Look for something in the 108-110 LSA range.

Are you looking at building a 450 HP+ motor or a mild daily driver with a lot or torque.

Dslayer9009

ok i found some really nice heads that i want they have 225cc intake runners would that be too much for the single plane intake and a 750 carb? do you guys think i need a bigger carb with that much head? haha.

in my research ive done i am going to run a 750 holly double pumper on a weiand stealth intake. power band is from idle-6800. the intake is already set i just wanted to know if a 750 will be enough.

Night rider327

iTrader: (13)

225cc heads are getting really big for a street 383. That's gonna move the engine into a class all together.

You will need more cam, carb, compression, stall, gear, exhaust.

Myself, if doing a 225cc head 383, it would be 11:1, 250/260 range @.050 mech. roller cam, 850 or so carb, 4000-4500 stall, 4.10 min gear, 1-3/4" or 1-7/8" tube headers, dual 3 or 3.5" pipes

Dslayer9009

thats what i was thinking, the heads are 200cc and then 225cc. and for some dumb reason the 225cc heads are cheaper by almost 100 dollars and im like wtf? i thought itd be too much, i just needed some more input. ill stick with 200cc