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Author Topic:   383 or 355
hoosier transplant
Dirt Maniac

Total posts: 104
posted October 22, 2004 02:40 PM  
I don't mean to start an argument on this subject, it's just that I am not a motor man. I will have to pay to have my motor redone. I'm curious as to what I should do during this winter. I currently have a 383. Our rules dictate 360 and smaller can run any carb and run at 3000 pounds, or 360 and larger must run a 4412 and weigh 3200 pounds. I just started running dirt this year(actually only ran less than 1/3 of the season) and the car came with a 750 carb so I just went ahead and ran it because I didn't figure I would be in contigent any way and they only tech the first four cars. I plan on freshening up the motor and was thinking of going to a 355. My feelings are that a two barrel just won't properly feed a good 383. Am I right or wrong. I can get it back to a 355 with good parts for about $2000. If I keep it at 383 I would need to buy a $550-600 4412. I still would have to get the 383 freshened up on top of the carb cost. I did finish in the top four once and won a heat race and don't want to go out next year with a car that's not legal and get dq'd. Thanks for any and all replies.

Istock66
unregistered Total posts: 104
posted October 22, 2004 05:21 PM           send a private message to hoosier transplant   Edit/Delete Message   Reply w/QuoteBBBBBB
383 easy choice, for now since you have it but
I would build a 406 next time.

Dont think you need to spend that on a 500 carb though, just buy a junker and send it to Kinetic performance..

sixwillwin
Dirt Freak

Total posts: 493
posted October 22, 2004 06:57 PM  
two barrel will have no problem feeding a 383. two barrel classes here run ever size CID engine you could imagine. Dont cheap out on the carb, get a good one.

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hoosier transplant
Dirt Maniac

Total posts: 104
posted October 22, 2004 07:58 PM  
Thanks for the comeback. Since I'm not a motor builder I wasn't real sure which way to go. I have gotten a lot faster due to chassis setup and now I think I might become a contender and just wanted to be sure I was legal in case I get that first win on dirt. Thanks again and have a great day.

rico 08
Dirt Forum Champ
Total posts: 1139
posted October 23, 2004 07:04 AM  
I'd run a 355...200 lb weight advantage and alot bigger carb.

Istock66
unregistered Total posts: 1139
posted October 23, 2004 01:31 PM           send a private message to rico 08   Edit/Delete Message   Reply w/QuoteBBBBBB
I stated my opinion allready above, but I have more time to say why now..

1. Can you even get your car raceable at 3000lbs?? Mine isnt. It would only have 50 rear wt, and I run 55-60 the latter being dry slick. For dry slick im at 3350 or so. My class rules are 3100 after the race. But I also noticed when running the higher rear that contact from other cars doesnt even budge my car..

2. If you calculate a number per cubic inch like say 8.4 that gets you pretty close to 3000 for a 355, well a 383 by that ratio would have to weigh 3217, and a 406 3410.... that shows that their penalty on 200 over for a larger motor isnt too good, the 406 is way under wt.

3. as for running a 2 barrel, Ive ran a tricked out 2 barrel plenty of times against 650-750 dps. and never felt I was giving anything up. Actually the 2 barrel seemed better often times on my own motors over my 650dp.

4. If you put a custom cam in a 383\406 with a 2 barrel holley it will be plenty of power for you.


All of this doesnt matter if your car isnt raceable at 3000 anyways!!!!!!!

hoosier transplant
Dirt Maniac

Total posts: 104
posted October 23, 2004 02:37 PM  
Istock 66, I understand what you're saying about weight. I don't know if I could get it down to 3000 any way; didn't stop to think of that. As far as the cam, can you give me an excellent cam specs to go to. And I was thinking if I stayed with the 383, of trying a stageI 4412. Good idea or not? Thanks to everyone for their input. In this sport I don't think anyones ideas are necessarily right or wrong-just that it works best for them.

rico 08
Dirt Forum Champ
Total posts: 1139
posted October 23, 2004 04:30 PM  
1.My car weighs 2980...it's very raceable
2.hard to spin?That's a nice benifit of a really heavy car...but the downside is that it makes the tires work harder,yes it will work but a good handling lighter car usually will be faster,more forgiving(tires won't go away)and cheaper to build(motor wise).But hey if you've got alot of money to blow get it up to 65% or more rear wt and drop in a 430+ small block with custom everything to put out some ponies with that small carb...but i was assuming from your post you were on a budget..moving on

hoosier transplant
Dirt Maniac

Total posts: 104
posted October 23, 2004 05:05 PM  
Rico, I don't have a lot of money to blow, that's why I'm asking questions now. My motor is a 383 now, so what I need to do is talk with my motor builder to see what it will cost to freshen up this motor and also what it will take to make it run good with a 4412 carb. If I was starting from scratch my decision would probably be different than what I'll decide at this time, with these circumstances. I haven't decided one way or the other right now, because both sides(355 or 383) have very good thoughts about what is better. Thanks again and everybody have a great day.

Istock66
unregistered Total posts: 104
posted October 23, 2004 06:31 PM           send a private message to hoosier transplant   Edit/Delete Message   Reply w/QuoteBBBBBB
Rico was attacking me for pointing out the obvious, and thinking I was rebutting against him I guess.

Anyways I race a leaf spring car and it will not work with less than 54 rear wt, and 58 on dry slick. period. Ive got 1000-1800 in all 4 of my 406's, and they all can be bought if Im in the top 4 for $425.00.

Call charles at camcraft for a cam.

Send a stock junk 4412 to KP on this forum and have him tweak it. If your rules allow opening it up have him do that, if not have him do the max he can do to it.

I run a cam from charles, and a kp carb. they are awesome people with good products and service...

rico 08
Dirt Forum Champ
Total posts: 1139
posted October 24, 2004 07:40 AM  
I wasn't attacking you at all..just stating my opinion from my experience.

hoosier transplant
Dirt Maniac

Total posts: 104
posted October 24, 2004 07:52 AM  
Rico, I didn't take your comments as an attack and there difinitely is no hard feelings at all. I don't have alot of money and that is why I'm trying to get other driver's thoughts on this before I spend my hard earn money and later say "I should have checked into this area first". I know that this is a dream but I would like to get it "right" the first time, or at least "righter". Thank you and everyone else that have voiced their opinion and I will take all into consideration before I do make my decision.

dgb
Dirt Full Roller

Total posts: 70
posted October 26, 2004 08:07 AM  
here's my two cents. -If your bottom end would be able to take advantage of the increased RPM potential of the bigger carb, then take the small cubes and big carb and wind it up more. If stock rods and cranks are limiting you to less than 6500 or so anyway, then the two barrel carb isn't going to hurt you too much. I think the small motor with the big carb is a better combo, but unless the competetion is turning big time RPM, I think you'll keep up okay with a 4412.

[This message has been edited by dgb (edited October 26, 2004).]

stockcar5
Dirt Forum Champ
Total posts: 578
posted October 26, 2004 11:19 AM  
go with the cubic inches and add some lead! i had to race once this year under a 3000lbs rule and i ended up with 55% rear. adding weight isnt gonna hurt much since you'll have a little more power.
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[This message has been edited by stockcar5 (edited October 26, 2004).]

    

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