Okay, I'm only 18 going into college but right now I have a dream and I'm starting to wonder if it will be possible. I want to take an 87 or 88 Iroc and drop in a 383 with dual 4 bbl carbs. I'm still learning a lot right now and even if i had the money, I don't have anywhere near the knowledge to start. So before I start to build my dream too large, I'm curious about its possibilty. I want a car that can break 9s on the quarter mile continuouosly. How possilbe is my dream? I know that there is a lot more to this than just the engine such as suspension and all but if i work the suspension and everythign like that, does the 383 have capability to put the power out to make 9s?

 

Also, this will all be naturally asperated.

 

all naturally aspirated? You could probably do it cheaper with FI or a single carb then the dual carb thing. It is very possible to get that speed. I see people with 350's doing it all the time. The big thing to realize, is that when your car is consistantly going low 9's, you dont really have much of a street car left, you have a race car. Terribly inefficient to drive. VIrtually no street manners, need race gas, maintanence, and just basic streetability. YOu would do better to get yourself a car to drive and a car to run 9's.

 

lj hit the big key. Naturally aspirated consistant 9's and streetable hardly belong in the same sentence. Unless, of course, that is what you want. Then by all means, go for it. Also, naturally asprirated 9's won't be cheap. Race heads (such as 18° designs), solid roller, and forged 4340 are names you need to become familiar with. So I think right now, the biggest thing you have do do is determine, how much streetablity are you willing to comprimise in order to go fast? Also, no need for dual carbs atop of a big single plane intake. If you look at all the high end single planes (single planes, not the tunnel rams), all the GOOD high end ones are single carb, usually a 4500 series Holley. The designs of todays high end race single plane intakes are too good to warrant a dual carb setup, unless you are in this for the "wow" factor from looks as well as the "wow" factor from going fast.

On a side note, around here, we have an old Mustang that runs consistant low 11's that occasionally hits the streets. At idle, it sounds like my old Caprice when it diesels down. It's kind of cool.

 

You could go 9's with a 305 if you tried hard enough and had a light enough car. If you could get down to like 2700-2800lbs all you'd need is 600HP or so to run into the 9's. Making a 600HP N/A motor isn't too hard if you got the cash BUT you'll more than likely be kissing "streetability" away. Then again, it'll still be able to go down the street it'll just cost you an arm-and-a-leg in fuel and spark plugs. One of my friends has a car that was running 9.90's last year on motor with a 383. His car weighs like 2800lbs, the motor has 14:1 compression, extremely ported Brodix Track 1 heads with huge valves, Super victor intake, 850 Holley HP (flows over 1000cfm), and a nasty custom ground solid roller from Crane which has somewhere in the 280* @ 050 duration. 4.56 gears, 29.5x11.50 slicks, powerglide trans, 5500+ stall. His exhaust was only 1 3/4" headers and 3" dual exhaust into Flowmaster 1 chambers. This year hes getting a custom set of headers with much bigger primaries and I think 3.5" duals. Car should be WELL into the 9's on motor. On top of that, hes gotta fogger that'll definately throw him into the 8's... All this from a car thats registered, tagged, insured, AND driven around town. One time he filled up the 15 gallon fuel cell and drove it around until the fuel ran out just to test it out and see if it'd overheat, break, or anything else when run for prolonged periods of time.... It passed the test and even got like 8mpg!

Now on the other hand, I know quite a few cars on pump gas small block running well into the 9's with a power adder. 90% of them being low 11 second N/A motors that get sprayed into the 9's.

 

OKay, I'm happy to hear that this goal isn't impossible. To answer a few questions, yes, i plan on having myself 2 Irocs (okay, so I'm a little greedy. ) The first will have the 383 (my race car) and the other will be my street car with a 350.

I like the idea of dual carbs because of the looks plus i wanted to get a larger intake manifold, one of the weiand that will put it up through the hood.

Since this will be my track car, i'll be gutting most of it and putting in just the needed. Hopefully keeping the weight very low.

If 9s are decently easy (but expensive) on a track-only 383, how fast can you get a 383 that won't be costing a fortune. Where can a garage mechanic get a 383 down to? I only want 9s becuase i like the way of breaking out of double digits but how low could a person go?

 

Have you ever even been 12's? Its nice to dream about what you want but think realistically all the time, money, experience, and skill it takes to go 9's. If every 18 year old kid could build/buy a 9 second car there would be a lot of dead 18 year olds

 

actually this isn't a dream for any time soon. I'm planning to start this when i'm about 30. I need some experience and lord knows i would end up dead with a 9 sec car, i know that. I'm just starting college so i can barely afford to do any work to my 305. but I'm just looking to get information right now.

 

11's, high tens are more realistic for a street car imho... I know there are ppl that run 9's NA, but not very streetable at all.

 

Again the 383 will only be a track car. Iplan to have a different car for street use.

 

ur nuts

 

why?