383 Possibility?
08-02-2009, 01:44 PM
#1
Launching!
Thread Starter
Join Date: Aug 2008
Posts: 252
Likes: 0
Received 0 Likes
on
0 Posts
383 Possibility? Is it possible to make my 98 LS1 a 383? I read that my year block can only be honed .005" and you have to hone to .010"? I already found a forged rotating assembly kit from texas speed for $1,800. I plan on using a MS3 cam would this cam clear the connecting rods with a 4.00" stroke? Finally does anyone know how well the MSD ignition box would work with this 383 crank, because I have read about people having problems with aftermarket cranks and the MSD.
Thanks
Thanks
08-02-2009, 05:52 PM
#3
Well, first off let me start with that I am not an expert concerning the engine blocks. With that being said, im not sure who told you that .005" is the most that you can do, but 3.905 is the most common bore used for the 383 rotating assembly. 3.898 is stock so .007" hone...practically nothing.
As far as PTV you should be completely fine. The MS3 was meant to clear stock pistons, and likely if you purchase a rotating assembly from texas-speed the pistons will have some sort of valve reliefs built in. Since texas speed carries both why not call and ask? Also ask a local shop to look at the block for the whole honing part...youll need to anyways.
And the MSD I havent the slightest clue.
As far as PTV you should be completely fine. The MS3 was meant to clear stock pistons, and likely if you purchase a rotating assembly from texas-speed the pistons will have some sort of valve reliefs built in. Since texas speed carries both why not call and ask? Also ask a local shop to look at the block for the whole honing part...youll need to anyways.
And the MSD I havent the slightest clue.
08-03-2009, 12:58 AM
#5
Why would you want to use a msd ignition box? The stock igntion system would be fine with new plugs and wires. Im pretty sure the block needs to be honed out a little bit to fit the 383 and its defintly a good idea to have a machine shop clean it up as far as that year block being different i havent heard about but i would call texas speed since you are ordering parts from them they are very help anyway.
08-03-2009, 01:09 AM
#6
TECH Fanatic
iTrader: (9)
Join Date: Nov 2006
Location: Fresno, California
Posts: 1,985
Likes: 0
Received 0 Likes
on
0 Posts
Search man.
You cant bore an LS1 like the blocks of old. 3.905 is generally accepted as the max safe bore size. throw a 4 inch stroke crank and you have a 383.
From the sounds of it your LS1 isnt heavily modded? Id say don't stroke yet, use that money to buy the best heads you can possibly afford (ahem mamo AFR's) and then get a cam to match those heads, not cam first. do a good H/C build and you will probably make more power than a stock 241 headed 383.
You cant bore an LS1 like the blocks of old. 3.905 is generally accepted as the max safe bore size. throw a 4 inch stroke crank and you have a 383.
From the sounds of it your LS1 isnt heavily modded? Id say don't stroke yet, use that money to buy the best heads you can possibly afford (ahem mamo AFR's) and then get a cam to match those heads, not cam first. do a good H/C build and you will probably make more power than a stock 241 headed 383.
08-03-2009, 11:26 AM
#7
Search man.
You cant bore an LS1 like the blocks of old. 3.905 is generally accepted as the max safe bore size. throw a 4 inch stroke crank and you have a 383.
From the sounds of it your LS1 isnt heavily modded? Id say don't stroke yet, use that money to buy the best heads you can possibly afford (ahem mamo AFR's) and then get a cam to match those heads, not cam first. do a good H/C build and you will probably make more power than a stock 241 headed 383.
You cant bore an LS1 like the blocks of old. 3.905 is generally accepted as the max safe bore size. throw a 4 inch stroke crank and you have a 383.
From the sounds of it your LS1 isnt heavily modded? Id say don't stroke yet, use that money to buy the best heads you can possibly afford (ahem mamo AFR's) and then get a cam to match those heads, not cam first. do a good H/C build and you will probably make more power than a stock 241 headed 383.
Trending Topics
08-03-2009, 08:08 PM
#8
Launching!
Thread Starter
Join Date: Aug 2008
Posts: 252
Likes: 0
Received 0 Likes
on
0 Posts
Why would you want to use a msd ignition box? The stock igntion system would be fine with new plugs and wires. Im pretty sure the block needs to be honed out a little bit to fit the 383 and its defintly a good idea to have a machine shop clean it up as far as that year block being different i havent heard about but i would call texas speed since you are ordering parts from them they are very help anyway.
08-03-2009, 11:37 PM
#10
TECH Fanatic
iTrader: (9)
Join Date: Nov 2006
Location: Fresno, California
Posts: 1,985
Likes: 0
Received 0 Likes
on
0 Posts
Id definitely recommend that you read around here ALOT more before you buy anything. You need to figure out what is out there and what you want from the car. Dont just look at LS1tech either. there are other sites out there (like hardcore) where alot of what is taken for gospel here is not so highly regarded.
08-04-2009, 12:04 AM
#11
take my word like zmonster said get u a good set of heads and a cam to match it before stroking it! i had a 383 with set ot tsp 5.3 stage 2.5 heads and a cam ground for those heads and u could feel the power restriction!!!! and as far as block ive tried all year models and cracked all year models but i was pushing a lot of nitrous down it throught LOL!
08-04-2009, 02:55 AM
#12
14 Second Truck Club
iTrader: (6)
Join Date: Sep 2002
Location: Bossier City, LA
Posts: 2,343
Likes: 0
Received 0 Likes
on
0 Posts
I did alot of research on the bore topic before ordering stuff for my 98' LS1 block. The 97-98 sleeves aren't as thick as the later blocks. The max safe bore is 3.903" on a 98' block. I think a few people on here have taken it to 3.905", but I'd rather be safe than sorry. I got the Mahle pistons (-6cc Valve reliefs) and Scat Rods for Texas Speed, good sponsor!
Btw, 383 make awesome torque down low and in the midrange! Especially with the F13!
Btw, 383 make awesome torque down low and in the midrange! Especially with the F13!
08-04-2009, 06:01 PM
#13
Launching!
Thread Starter
Join Date: Aug 2008
Posts: 252
Likes: 0
Received 0 Likes
on
0 Posts
I did alot of research on the bore topic before ordering stuff for my 98' LS1 block. The 97-98 sleeves aren't as thick as the later blocks. The max safe bore is 3.903" on a 98' block. I think a few people on here have taken it to 3.905", but I'd rather be safe than sorry. I got the Mahle pistons (-6cc Valve reliefs) and Scat Rods for Texas Speed, good sponsor!
Btw, 383 make awesome torque down low and in the midrange! Especially with the F13!
Btw, 383 make awesome torque down low and in the midrange! Especially with the F13!
08-05-2009, 08:26 PM
#14
the biggest thing u will run in to is getting a 3.903 piston with out buying a expensive custom build. i may be wrong but i dont remember seeing a shelf build 3.903. 3.905 is a common shelf piston.
08-06-2009, 01:52 PM
#15
Is it possible to make my 98 LS1 a 383? I read that my year block can only be honed .005" and you have to hone to .010"? I already found a forged rotating assembly kit from texas speed for $1,800. I plan on using a MS3 cam would this cam clear the connecting rods with a 4.00" stroke? Finally does anyone know how well the MSD ignition box would work with this 383 crank, because I have read about people having problems with aftermarket cranks and the MSD.
Thanks
Thanks
These blocks aren't paper thin and fragile as delivered from the general. Just set it up with a 3.905 or 3.910 (also common) and don't give it another minutes thought....you will have zero reliability issues.
Hope this helps....
-Tony
Last edited by Tony Mamo @ AFR; 08-06-2009 at 02:01 PM.
08-06-2009, 02:14 PM
#16
...Good words Tony, but also, you might want to think about just getting a short block 383 from texas speed instead of building one. It sounds cheap the way you are doing it, but once you get the labot into it, its gonna cost you pretty close to an assembled forged 383 that TSP has already. Cuz if your going to stroke it, then you dont want to go with pistons that arent forged. Just food for thought...
08-10-2009, 12:47 AM
#17
Launching!
Thread Starter
Join Date: Aug 2008
Posts: 252
Likes: 0
Received 0 Likes
on
0 Posts
...Good words Tony, but also, you might want to think about just getting a short block 383 from texas speed instead of building one. It sounds cheap the way you are doing it, but once you get the labot into it, its gonna cost you pretty close to an assembled forged 383 that TSP has already. Cuz if your going to stroke it, then you dont want to go with pistons that arent forged. Just food for thought...
08-10-2009, 09:24 AM
#19
TECH Regular
iTrader: (1)
Join Date: Aug 2006
Location: Mi
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
Eagle was making a forged stock LS1 bore size piston when we did my 383 back in 07. This would require only a very light hone (cylinder clean up) and would allow for the expansion of the forged pistons in the cylinder. Obviously this will be a 382,thus you will lose a "whole" one cubic inch.
08-10-2009, 07:56 PM
#20
Launching!
Thread Starter
Join Date: Aug 2008
Posts: 252
Likes: 0
Received 0 Likes
on
0 Posts
The man already stated that he needed to pay for the cylinders to be bored (honed) and the rotating assembly can be purchased as balanced unit.
Eagle was making a forged stock LS1 bore size piston when we did my 383 back in 07. This would require only a very light hone (cylinder clean up) and would allow for the expansion of the forged pistons in the cylinder. Obviously this will be a 382,thus you will lose a "whole" one cubic inch.
Eagle was making a forged stock LS1 bore size piston when we did my 383 back in 07. This would require only a very light hone (cylinder clean up) and would allow for the expansion of the forged pistons in the cylinder. Obviously this will be a 382,thus you will lose a "whole" one cubic inch.