DNAST1

Can someone please explain to me whats makes a 402 a 402, 383, a 383 and so on!? Too many configurations

ss rally red

iTrader: (8)

It has to do with engine bore size and crank stroke lenght in a nut shell.

SmokeySS

iTrader: (7)

I'm sort of a noob here but first you have to bore the block. You make each cylinder larger in diameter - therefore adding displacement (making the higher numbers you posted like 383 and higher). But you'll have to get at least a new crank and pistons and connecting rods. And that's all that I know, I think I covered the basics but I'm sure there are a few more things to it.

ty_ty13

iTrader: (42)

or course with larger cubes youll need a larger cam.... a better flowing intake and TB and a good set of heads... and some large (1 7/8) headers...


one thing leads to another and strokers cost a good deal of time and money...

mainly money.... but it just takes time to pull the motor.... hone it... put it back together... wait on parts..... wait on more parts.... break something on install.... wait again.... do you see a pattern...

1CAMWNDR

iTrader: (21)

389.....4.135" bore with a stock 3.322" stroke .

Beast96Z

iTrader: (21)

3.622 is the stock stroke. There are many configurations to strokers for the LS-1's. We have so many diffrent blocks to work with, like the stock block, stock LS-2 block, Darton sleeved blocks, C5-R blocks, 6.0L blocks, and re-sleeved LS-2 blocks. Each block has it's limitations on bore size, so each one serves it's own purpose. Here are some diffrent configurations:
1. Stock block honed with a 4.00" stroker crank shaft = 383 "All Stroke".
2. Stock block honed with a 4.125" crank= 396 All Stroke.
3. Stock LS-2 block honed with a 4.00" crank= 402 cubes
4. Stock LS-2 block honed w/4.125" crank =414 cubes
5. Darton block w/4.125 bore and 4" crank = 427 cubes
6. Darton block w/4.125 bore and 4.125 crank= 441 cube
*You can change bore sizes on the Darton to make diffrent cubes.*
7.The C5-r block carries the 4.125 bore, so it is the same as the above Darton numbers.
8.6.0 block w/ 4.030 bore and 4" crank = 408 cubes
9.6.0 block w/ 4.030 bore and 4.125 crank= 422 cubes.
*Max bore on the 6.0 block is 4.060 if the block passes sonic testing*
You could also use a 4.250 stroke crank if you wanted even bigger numbers, but the rod angle starts to get bad and causes alot of side loading. You can also use stock cranks in some of the above blocks and get 387's and so forth, but these would be "All bore" motors. The all bores tend to make more peak HP, whereas the "all strokes" tend to make lots of low- end torque.

gollum

iTrader: (1)

Nitrous Oxide is cheaper than cubic inches and can be safe if installed properly. Allthough I would love to own the big cubic inch 427 ls7 Vette.

cyphur

iTrader: (10)

nitrous is also off and on. the motor is always there

SiL3NtXWS6

iTrader: (17)

Nitrous + stroker

Cal

iTrader: (1)

My vote is for an all-bore 383, stock LS1 stroke aluminum motor with forged rotating assmebly and nitrous as a backup measure. Shift it at 7200 rpm . .

ty_ty13

iTrader: (42)

im not familiar with boring or stroking ...i can just imagine the work and time...

but can you make a 383 with just a longer crank stroke.... meaning.. not having to bore the cylinders any?
or what if you did a little boring and a little longer crank....

what would be the advantages and disadvantages to the two i mentioned?

1CAMWNDR

iTrader: (21)

DOH!! Typing lessons ...........

Joel_SS

iTrader: (8)

Yes, put a 4.00 crank in it.. stock LS1 with a 4.0 crank = 383

cyphur

iTrader: (10)

Almost. You need to bore it out .005 and then throw a 4" crank in there.

3.905 bore + 4" stroke = 383 stroker.

Beast96Z

iTrader: (21)

If you have a brand new block that dosen't require a hone, then you can use just the stroker kit. If the block is used, it will require a hone of .005 or so. My 383 was honed to 3.905 w/a 4" crank. Stoking a motor does require new rods and pistons. Most just buy the complete kit.

ty_ty13

iTrader: (42)

i dont under stand... why does it matter if its new or not determine wether it needs a bore of .005 to make a 383 stroker?

Beast96Z

iTrader: (21)

If your block is new and has a factory hone on it, you will have a stock bore size of 3.898". This coupled with the 4" stroke will give you a 382. If your block is used, you need to hone it so the new piston rings will seat. When you hone, you make the bore larger which adds more volume to the cylinder, thus making it larger by 1 C.I.. Therefore the 383.

FIREHAWK #07

iTrader: (1)

overall which is better.... more stroke, or more bore????

ty_ty13

iTrader: (42)

you just opened a can of worms...

ty_ty13

iTrader: (42)

gotcha.... have to smooth things out for the used block to make the rings seal...