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Old 05-22-2012, 12:18 PM
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turning a 350 into a 383 stroker

hi I need help guys I'm trying to make a 350 a 383 stroker but I dnt know were to start..its only goin to be on the street no drag racing or anything..I wanna know what all do I have to do from top to bottom and im not looking to spend alot of money but i know its not goin to be cheap either but i would like to go the cheapest but decent route and please be detail when you reply..if it helps any I'm in tampa bay area fl n its goin in a cutlass that's set up for a small block already with a grand national rearend b&m floor shifter that's for a 4sp trans so if you guys can help me out I would appreciate it sio much..

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Old 05-22-2012, 12:40 PM
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Quote:
Originally Posted by jperry90
hi I need help guys I'm trying to make a 350 a 383 stroker but I dnt know were to start..its only goin to be on the street no drag racing or anything..I wanna know what all do I have to do from top to bottom and im not looking to spend alot of money but i know its not goin to be cheap either but i would like to go the cheapest but decent route and please be detail when you reply..if it helps any I'm in tampa bay area fl n its goin in a cutlass that's set up for a small block already with a grand national rearend b&m floor shifter that's for a 4sp trans so if you guys can help me out I would appreciate it sio much..
This is one of the most common questions asked on here, type "383 stroker" into the search bar near the top of the page and start reading. Tons of information is available on this site. You just have to do some researching.
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Old 05-22-2012, 01:29 PM
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Assuming your 350 block is rebuildable you can plan on about $1800+/-
to build a decent 383 short block.
Find a good local auto machine shop and get a quote from them.

IF you only ave a limited amount of money to spend this may not be your best path to better performance.

EG if you have a crappy set of cylinder heads now, you will still have crappy heads with a 383. And very limited power-performance gain for $1800ish spent.
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Old 05-22-2012, 01:32 PM
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ok that's not as much as I thought it would cost..and what do I need the machine shop to do??
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Old 05-22-2012, 01:41 PM
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Quote:
Originally Posted by jperry90
ok that's not as much as I thought it would cost..and what do I need the machine shop to do??
If you have to ask that...... Everything including hold your hand.

There is some extra cost specific prep labour to build a 383

Block oil pan rail hand clearancing. Sometimes the bottomof the cylinder barrels in the block too.
Possible connecting rod bolt head clearancing (depends on what rods you use)
(and or small base circle camshaft)
The crank will need balancing. The cheap 383 kits do not have a balanced crankshaft.
Sometimes the crank supplied on common "383 stroker Kits"
is not perfect and needs to be reground to get it right.

Rotating assembly in block mock up check measurement and Block deck cutting to get the desired compression ratio and piston deck clearance @TDC is extra time and labour.


Often people pick the wrong 383 engine kit with the wrong compression ratio cause its cheaper. ya it matters. Depending on the heads used.

64cc heads need a -12cc dished 383 piston. the 383 kits with flat top pistons use a 70+cc cylinder head.
Don't goof it up if using 64cc heads. Excessive compression ratio is not your friend.

Most good shops know how to do all this, but you will pay more to build a 383 than a 350. Why...because it is more additional work and takes longer to do.

You can go screaming fast with a 350 based combo.
If you got crappy heads now don't expect blazing performance with them on a 383.

Last edited by F-BIRD'88; 05-22-2012 at 01:58 PM.
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Old 05-22-2012, 02:01 PM
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Would machine shop costs top the price of buying a ready to build 350/383 block from Summit ?$651.95 at the moment reduced to $629.95
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Old 05-22-2012, 02:09 PM
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Or a BluePrint Engines BP3830 - BluePrint Engines GM 383 C.I.D. Short Block Stroker
@ $2,095.00

Sift through this lot at Summit could be better than some of the machine shop nightmares Iīve read about.
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Old 05-22-2012, 02:18 PM
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Quote:
Originally Posted by malc
Would machine shop costs top the price of buying a ready to build 350/383 block from Summit ?$651.95 at the moment reduced to $629.95
Remember this is just the block.
The cylinders may need further final honeing to fit the pistons.
The decks are probabily cut a bit to straighten them but may need further decking if
a specific deck clearance is desired . EG: "O decked"

The basics are done but getting the specifics right ( deck clearance , compression ratio, piston to wall etc is not included)

There is a big difference between a throw together motor and one built right.

YOu need to take this up with the guy actually building the motor.

Building a done right 383 that will actualy make power is not that cheap.
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Old 05-22-2012, 02:20 PM
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ok yea I know that its diff kits I just saw a kit on ebay for almost 900 it was for a .030 which is the bored I was goin with now with that kit what work will I have to do to my block or what otha machine work will be needed??what else would I have to do after I buy the 383 kit that fits my build..
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Old 05-22-2012, 02:25 PM
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Iīd go for a long block then if I didīnt have the heads etc.
You also get a warranty.
BluePrint Engines GM 383 C.I.D. Stroker Base Budget Stomper Crate Engine with Cast Iron Heads $2,595.00.
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Old 05-22-2012, 02:27 PM
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What are you actually trying to achieve? Performance level?

What are you working with now? (engine, , heads ,,gear ratio etc etc) A 383 may not be your best bet.
You can do a lot in other critical areas for $1800. to get more performance.
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Old 05-23-2012, 12:26 AM
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well I'm willing to spend more than 1800 and I'm willing to buy what ever I have to so I can build a 383..I'm only lookin for about 400hp and I can get just about any part that I need for cheap..I can get any engine block that you guys tell me is the best to use because I seen some people sayin a 400 is better to build then a 383 so what do you think I should do just let me know and I would write everything down you tell me and start on my build and post pics of it as I go..I got access to a couple 400 blocks and a couple 350 block so which way should I go and if you know just about every part I need let me know and I will buy it and get started on the build..
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Old 05-23-2012, 02:12 AM
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Just how much experience do you have to build a motor ?
I ask because you need so much what do I need info before you start.
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Old 05-23-2012, 02:24 AM
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If you can get hold of a virgin (non-bored) 400 block then I would build a 406....which is a .030 over 400. A lot simpler to build for a new guy and a good running 406 will outrun a good running 383.
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Old 05-23-2012, 05:36 AM
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malc

well I never really messed with old skool cars I'm use to working on newer cars but I hear that old skool cars are easier to work on..and I know some of the parts I needed to start on the 383 I just don't know everything that's y I was asking what all will I need to make sure I'm not missing anything because I wanted to get everything rite the first time from the oil pan on up to the carb..
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