I almost bought a 600 CFM carb today... Should I buy another... Possiable 700 or 750?

 

type of carb?? Vacuum secondaries would be good, dont overlook the quadrajet they are a good carb for the street and can be bought real cheap. I wouldnt go beyond 750 cfm the 600 maybe a little small.

 

not a desktop dyno but, comes in pretty handy http://www.virtualengine2000.com/Calculator.exe ... Sick

 

Where do you get that program, and how much does it run?

 

You can get the program at Jegs or Summit for under 20 bucks. The best heads for a 383, dollar wise, are the Dart IE 210cc runner, 72cc chamber, 2.02/1.60 setup. About $800 or so for the pair. You'll need a cam with at least 225/235 @ .050 and a 750 carb. Compression about 10-1 and a good single plane intake with a 1" spacer. It should make 400 very, very easy, For all of You about to jump down My throat about the single plane, The stroke will make up any low end torque problems. The 750 is better for this size engine ( Air usage ) than a 600 or 650. Those work great on 300 inch motors or on trucks. I've done many, many 383's and have tried all kinds of combonations, this will run great.

 

I think it was around $100.00 comp cams puts it out it is an interesting program and very helpful in alot of aspects but it does not take the place of experience, as an example you could put in a 1000 cfm carb for the 383 and show a hp increase we all know for this application the carb is to large so you need to use common sense with it. It also "has" some other features that can to be activated$$$(I didnt do it) . After playing around with it for a few years thoughI feel it was well worth the money .

Here is a link http://www.proracingsim.com/desktopdyno.htm

 

I would go with a 750 holley, it works well with almost any 350 and has never failed me. I'm looking for a set of heads myself and so far it looks like the best are Dart iron platinum heads. But i'm still searching.

 

dd dyno is $74.95 at summit http://store.summitracing.com/partde...5&autoview=sku

The Dart platinum iron eagles are 215 or 200 (in the range we are talking about) they are good heads for the price there are a few things to consider 1) they are heavy more than stock cast iron 2) with the new style iron eagles pay close attention to pushrod clearances to the intake exhaust runners they are very close, 3) aluminum heads will tolerate a higher compression ratio on pump gas 10 to 10.5:1 iron heads are 1 point down from this. Cost wise for the performance iron eagles are hard to beat.

 

Don't forget to mention that you need BS composite gaskets to use aluminium heads on an iron block, where as with iron heads, they expand equally with the block, and so no composite is needed, and any decent gasket will do. I've always liked copper for head gaskets, due to it's ability to make a decent strength gasket with a very thin guage, and you can only use it for like metal heads and blocks.