another question about the kits? for 383..

[1991chevykid]

ok i started in mind with the pro 1 series but i was looking at the iron eagle series too.. Which would you suggest the iron eagle or pro 1 series with 200cc runners?
whats the difference besides the prices...

[Dart Vader]

I'll have to consult our techs on that one. First, though, I'll need some more info on what you are buidling.
Cam, compression, maximum rpm, intake, headers, torque convertor, gear ratio, vehicle weight, use.
Let me know and I'll run it past our guys here. :D

[1991chevykid]

cam: Beast Hydraulic Cam
1800-6000 RPM Range
288/298 Adv. Duration
444/467 Gross Lift

compression: shooting for 10-1

maximum rpm: 6500max

intake: with the kit (dual plane)

headers: depends on the kit...

torque convertor:

gear ratio: questionable

vehicle weight: around 4000Ibs

use: street/strip

(you know something i can get my self in trouble just cruzin around town lol)

im just getting in to this project and theres alot of possibilities for the small block
so not positive on all these things that you asked for but if thats not enough info tell me i can get more...

i know i prolly sound like an idiot not knowing all this stuff but im really hoping to learn from this project and with a little help from you guys i think this project will turn out awesome and fun all at the same time...

[Dart Vader]

An idiot would have built the engine without asking questions. ;)
That's what the boards are here for!
I talked to one of our techs about this and he tells me that you will get great power from either head. The aluminum Pro1s will obviously cut your weight down a bit, but you are going to get really strong performance out of the Eagles also.
So, really it's a preference thing, but unless the extra weight is really important to you (The iron 200cc heads are about 52 lbs and the pro1s are about 23 lbs) you will save some cash on the Iron Eagles.
Hope this helps!

[1991chevykid]

it does and thanks...

[lun40119]

If it were mine, I personally would use the iron head for one big reason. The iron head will be lots more durable. I had a set of Sportsman II heads all through high school. I had them on 6 different small block variations until just recently, I removed them, and sold them to my little brother who will be getting his drivers license in a couple months. I replaced mine with a set of Pro 1's cause I am done tinkering with that engine. Time to start over with something bigger. Those heads have been to h**l and back. The have fallen off benches and over heated. My girlfriend now my wife once called and asked me how hot was too hot, and then told me the sport comp guage I had was broke because it was PEGGED. A quick check for cracks and back on they went. You might actually make a little bit more power with the iron heads, becuase of the heat factor too.

[1991chevykid]

yeah i was leaning towards the iron heads because of the heat issues i think they would last a little longer and the saving the money thing...

this is actually my first project.... and i hope its a great 1
i got 2 350 blocks that im gonna be building off of but the first one that im building now is going into my truck...

[want-a-be]

Do you have your rotating assembly yet? If not then you ought to go with the 383 imo. Spend the extra $$$ to have it internally balenced. Worth the extra I think. I've never done a back to back test but I've been told that the iron over the Aluminum is worth somewhere around 30-40 hp. With the Iron heads might keep around 9.5-1 compression cause of bad gas . Unless your going to run only E85. Then you can bump it a bit.

Do yourself a favor and try to keep your lobe seperation around 112 degrees for vacuum at idle. Don't buy a budget cam they can only cause troubles for you. I like cam-motion they have always done me right. I'm thinking of trying Mike Jones at www.jonescams.com on a customers race engine . Might try him also.
Feel free to pm me here with any other questions

Good luck, Don

[Awesome Bill]

If your doing a 350 and your auto is 4000 lbs, use the s/r 165 cc heads with the smaller combustion chamber. A 200 cc head is way to large, a 180 would be my max as is with our 383 street heat version we sell. If you were doing a 383 stroke engine then 180 would be my choice and 200 would be pushing it. A heavy car like that need torque no hp. A high hp engine will most likely need a ton of gear and converter, will not recover quickly in the shifts and be slower than a torque monster that will require less gear and converter and be easier on parts all the way around and when the tranny is shifted, the engine will be more apt to pull right back up hard. Big headed sbc don't run very well unless they are fully equipped to maximize their potential. Single plane intake, large carb, cam, converter, etc. We are talking about a 4000 lb auto. Either way, your not an idiot, your doing what you should. gather information then purchase 1 time. Steel heads are my pick also.

[1991chevykid]

i appreciate all the information you guys are giving me...
it honestly is making me more confident in starting this project...
heres what my vehicle is that this engine is going in since i haven't said anything about it...
1991 chevy 1500 silverado, shortbed, regular cab
stock engine is a 350 with a 5-speed (Very nice by the way)
(it stock will run 80mph shifting in to 4th)
i know that that really doesnt mean anything but running down the highway and seeing a ricer (no offense to anyone) and them running right next to me and me shifting down and smoking them is pretty fun...