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NEED GOOD OPINIONS! CHEVY 400sbc!

 
bore.coon.chevy
I love my Chevy Chevette!
Posts: 11
Joined: 04/13
Posted: 04/15/13 07:52 PM

hey guys, i just bought a 72 longbed chevy and im currently rebuilding a 400 to drop in it, im going to make a hot rod out of this truck to just take to cruise nights and drive to tha strip. i really need help picking a good cam for this motor to make it have the most choppy idle possible but still one that will ive a good amount of low end torque. and any opinions on how i can make this motor a beast please let me know! thanks
                                         justus merrill  

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swaluda
V-6 Camaros rule!
Posts: 71
Joined: 11/12
Posted: 04/15/13 09:04 PM

Comp Cams, Ring up Youtube, and punch in Comp Cams. The guy gives you a rundown on all of them. Make sure your heads are friendly with your cam choice or you wont be happy,   Stan  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 04/15/13 09:46 PM

Low end torque and monster choppy idle are mutually exclusive, you can't have both without having monster cubes.  
68scott385 68scott385 68scott385

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pepsi1
I mow my lawn and find Chevys
Posts: 1718
Joined: 09/11
Posted: 04/15/13 10:35 PM

bore.coon.chevy

We need to know the following?

What trans. if an automatic what stall speed is the torque convertor?

How tall are your Rear Tires. (Makes a difference on what your final gear number is).

Then we can do some research for your cam.

Bob  

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 04/16/13 11:56 AM

Icon Quote68scott385:
Low end torque and monster choppy idle are mutually exclusive, you can't have both without having monster cubes.

+1 Scott.   its one or the other.     more info is needed.  

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bore.coon.chevy
I love my Chevy Chevette!
Posts: 11
Joined: 04/13
Posted: 04/16/13 01:55 PM

alright it is an automatic, but i am clueless of the stall speed, is there anyway i can find that out easily? and the rear tires are 27 in. tall.
                                                        Justus Merrill  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 04/16/13 02:01 PM

Which automatic?

Pan Id

1 = aluminum Powerglide
2 = th200(metric), th200c(metric)
3 = th250, th250c, th350, th350c, th375b
4 = th375c, th400, th475, 3L80, 3L80hd
5 = th200-4r
6 = th700-r4, 4L40, 4L60e
7 = 4L80e
c = lock up torque convertor
e = electronic/computer controlled

...and since we're talking automatics...

Transmission Dimensions

If the truck is stock, the transmission is either a th350 for small block applications or a th400 for big block applications.  
68scott385 68scott385 68scott385

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 04/16/13 02:29 PM

And...

http://www.crankshaftcoalition.com/wiki/General_Motors_transmissions

...about 1/2 way down the page is where I got the info I posted above.  
68scott385 68scott385 68scott385

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bore.coon.chevy
I love my Chevy Chevette!
Posts: 11
Joined: 04/13
Posted: 04/16/13 02:59 PM

i would definitly say the trans would be stock. so th 350  

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skyeking
I mow my lawn and find Chevys
Posts: 2738
Joined: 08/09
Posted: 04/16/13 04:54 PM

A 230 cam with about 510/1000"  should be the way to go...Good luck..  
skyeking

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bore.coon.chevy
I love my Chevy Chevette!
Posts: 11
Joined: 04/13
Posted: 04/16/13 06:53 PM

thank you i sure appreciate it.  

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 04/16/13 07:12 PM

what kinda pistons are you running?   what kinda heads?   compression ratio?   rear gear ratio?    
   the more info you can provide, the better. Wink

   the 280 cam will sound nice at an idle, but without some rear gear, its not gonna be a fun driver down low.  JMO.  

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xFourLeaf
V-6 Camaros rule!
Posts: 62
Joined: 01/13
Posted: 04/16/13 09:30 PM

When it's all said and done i hope it sounds like this.


https://www.youtube.com/watch?v=VrM-qNsfzuQ  
xFourLeafxFourLeaf

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bore.coon.chevy
I love my Chevy Chevette!
Posts: 11
Joined: 04/13
Posted: 04/19/13 09:44 AM

id sure like it to sound like that, ...this motor is stock on the inside, i wanna get maximum horsepower out of this motor so what is the first step i should take?  

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 04/19/13 11:21 AM

first, id go through the bottom end.  make sure everything is in good shape.  put new bearings in if everything checks out o.k.   lose the dish pistons and get some flat-tops for street use.   invest in some good aftermarket aluminum heads if theyre in the budget.   weld your pick-up to the oilpump so it doesnt come loose.   get a good double roller timing chain.    some roller rockers will free up a few ponies.   gonna want a good aluminum, dualplane intake for the street.   gasket match your intake and heads.  
    couldnt hurt to pick up a book on hotrodding small chevys too.  might give you some more ideas?     just tossing some ideas out there.   do you have a certain budget you would like to keep it under?  

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