Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

383 stroker, worth it?

Thread Tools
 
Search this Thread
 
Old 10-23-2007, 05:33 AM
  #1  
TECH Fanatic
Thread Starter
 
Thule's Avatar
 
Join Date: Jul 2006
Location: reykjavík, iceland
Posts: 1,843
Likes: 0
Received 0 Likes on 0 Posts

Default 383 stroker, worth it?

my lil angry 346.. is just.. not big enough,

like i have mentioned in some posts here i want a big cube block, (LSX/408/402)

but its just to expensive to build another motor when i am not even finished building the 346,

thats why i started thinkin about buying a stroker kit, and some big cam like Trex/ms4/vindicator,

is it worth the 3k it would cost me? i should be around 420ish rwhp N/A on my current H/C/I set up, (stageII ls6's 59cc 226/226cam fast90/90 and more)
Old 10-23-2007, 06:30 AM
  #2  
Internet Mechanic
iTrader: (17)
 
BlackScreaminMachine's Avatar
 
Join Date: May 2005
Location: Wallingford CT
Posts: 9,831
Likes: 0
Received 2 Likes on 2 Posts

Default

Had a bud with a Rapid Motorsports 383, it wasnt n2o built but he still sprayed it to easy mid 10's no prob. Thats with a th400, 400ish stall on a moser 12 bolt. Quite a fast car.
Old 10-23-2007, 08:36 AM
  #3  
TECH Fanatic
iTrader: (26)
 
Michael02hawk's Avatar
 
Join Date: Feb 2005
Location: Rochester, NY
Posts: 1,155
Likes: 0
Received 1 Like on 1 Post
Default

I love my little 'ol forged LS6/383 block! Dyno numbers in my sig are outdated, more like 480/450 (estimated) now. Great Hp and lot sof torque.

Select a good head/cam package with your build, tune it right and enjoy it.
Old 10-23-2007, 08:39 AM
  #4  
10 Second Club
iTrader: (1)
 
PewterZ28's Avatar
 
Join Date: Mar 2002
Location: St.Louis, MO
Posts: 1,088
Received 0 Likes on 0 Posts

Default

You'll definitely need a bigger cam that is designed for the bigger cubes. That's what I recently found out when I bumped up to a 383 stroker but kept the same cam.
Old 10-23-2007, 09:22 AM
  #5  
On The Tree
iTrader: (8)
 
dmiz0420's Avatar
 
Join Date: Aug 2006
Location: N. Va
Posts: 182
Likes: 0
Received 1 Like on 1 Post

Default

420 rwhp is awefully low for a 383. Aim higher, if you dont get at least 500 rwhp out of it there's a problem...

good rule of thumb is 1.5 hp/ci, if you can't get that your not trying.
If your 346 made 475 rwhp would you still spend $2-$3k on a stroker assembly?
Old 10-23-2007, 10:30 AM
  #6  
TECH Fanatic
iTrader: (26)
 
Michael02hawk's Avatar
 
Join Date: Feb 2005
Location: Rochester, NY
Posts: 1,155
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by dmiz0420
420 rwhp is awefully low for a 383. Aim higher, if you dont get at least 500 rwhp out of it there's a problem...

good rule of thumb is 1.5 hp/ci, if you can't get that your not trying.
If your 346 made 475 rwhp would you still spend $2-$3k on a stroker assembly?
Well - I dont completely agree, or did you mean to say flywheel hp instead of rwhp? Either way, everyone has their own set of goals.

For me, low/mid range power outweighed the peak numbers.
I also wanted a combination that would be a decent daily driver, of course that is subjective too.
Old 10-23-2007, 11:26 AM
  #7  
TECH Fanatic
Thread Starter
 
Thule's Avatar
 
Join Date: Jul 2006
Location: reykjavík, iceland
Posts: 1,843
Likes: 0
Received 0 Likes on 0 Posts

Default

i got a 226/226 585 112LSA cam in my motor now,

the 420rwhp is around what i am making at the moment, and for me that is just not enough,

thas why i was thinking about a stroker kit,

isin't the ms4 big enough for a stroked motor? or should i go bigger?

what amount of cain could i expect?

thanks all
Old 10-23-2007, 12:58 PM
  #8  
TECH Fanatic
iTrader: (26)
 
Michael02hawk's Avatar
 
Join Date: Feb 2005
Location: Rochester, NY
Posts: 1,155
Likes: 0
Received 1 Like on 1 Post
Default

Last year I had been running the TR224/114 cam in my 383 with AFR 205 heads. I was putting down 425rwhp. It was fun...but I agree, it wasnt enough.

My winter project was to upgrade the cam. I called Tony Mamo with AFR, and he suggested their 234/238 cam, I choice to keep the 114lsa.

With an updated tune...well, you see my numbers. I'm happy with the setup now. Sure, I still could have gone with a larger cam, since my pistons already have reliefs in them, we even measured clearance, and I do have some to spare. I think my next project would be do get the heads milled.
Old 10-23-2007, 01:15 PM
  #9  
Banned
iTrader: (19)
 
Bryan @ Speed Inc.'s Avatar
 
Join Date: Jun 2005
Location: chitown
Posts: 1,879
Likes: 0
Received 0 Likes on 0 Posts

Default

you should get a cam that is designed for a bigger cubed motor, not just grab a popular big cam that's made as a max effort cam-only 346.

speed inc has quite a few stroker grinds. their SS2 cam is a very street friendly cam that has made impressive horsepower/tq.

http://www.ls1speed.com/catagory.cfm...in%20/%20Heads
Old 10-23-2007, 01:20 PM
  #10  
TECH Fanatic
iTrader: (7)
 
GMmexican's Avatar
 
Join Date: Jan 2006
Location: San Jose, CA
Posts: 1,607
Likes: 0
Received 0 Likes on 0 Posts
Default

go with a custom stroker grind, its not worth it IMO using a cam desgined for 346ci....your not getting the most out of the extra cubic inches
Old 10-24-2007, 06:06 AM
  #11  
TECH Fanatic
Thread Starter
 
Thule's Avatar
 
Join Date: Jul 2006
Location: reykjavík, iceland
Posts: 1,843
Likes: 0
Received 0 Likes on 0 Posts

Default

part of the reason for i want to do this is that i want to reuse my patriot stageII ls6 heads, 59cc, they should be good with the stroker kit?

how much has to bore the cylinderblock for the 383 kit?
Old 10-24-2007, 12:08 PM
  #12  
9 Second Club
 
CodeRed2000SS's Avatar
 
Join Date: Jan 2006
Location: Kinston, NC
Posts: 457
Likes: 0
Received 1 Like on 1 Post
Default

i got a ms4 in mine, put down 450 at the wheels, with 5.3 heads
Old 10-24-2007, 12:22 PM
  #13  
Banned
iTrader: (10)
 
edcmat-l1's Avatar
 
Join Date: Jul 2006
Location: Va Beach
Posts: 4,782
Likes: 0
Received 4 Likes on 4 Posts
Default

383, AFR205s, Fast 90, pretty mild cam. Something like a 239/243 .615 on a 113+3.
Its all in the heads, cam choice, and of course the tune.
This was also with a road race safe 12.6:1 or so, and 26 degrees of timing up top.

Old 10-24-2007, 03:34 PM
  #14  
12 Second Club
iTrader: (1)
 
chrisdacarnut's Avatar
 
Join Date: Sep 2006
Location: Norman, OKLAHOMA
Posts: 157
Likes: 0
Received 0 Likes on 0 Posts

Default

That afr is nice and flat!
Old 10-24-2007, 04:17 PM
  #15  
On The Tree
iTrader: (5)
 
LS7jUnKiE's Avatar
 
Join Date: Sep 2007
Location: Tampa, Florida
Posts: 164
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Thule
part of the reason for i want to do this is that i want to reuse my patriot stageII ls6 heads, 59cc, they should be good with the stroker kit?

how much has to bore the cylinderblock for the 383 kit?
a honing is needed to 3.905 inches, the main increase is in the stroke bumping it up to 4.00 inches.
im pretty sure if you dont hone the bore then you end up with 382ci.
Old 10-24-2007, 05:53 PM
  #16  
TECH Fanatic
Thread Starter
 
Thule's Avatar
 
Join Date: Jul 2006
Location: reykjavík, iceland
Posts: 1,843
Likes: 0
Received 0 Likes on 0 Posts

Default

interesting!

i want an lsx block.. its just so damn expensive, maybe this is it for me
Old 10-24-2007, 08:18 PM
  #17  
Staging Lane
 
McLeod's Avatar
 
Join Date: Feb 2006
Posts: 70
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by edcmat-l1
383, AFR205s, Fast 90, pretty mild cam. Something like a 239/243 .615 on a 113+3.
Its all in the heads, cam choice, and of course the tune.
This was also with a road race safe 12.6:1 or so, and 26 degrees of timing up top.

That graph looks familiar. I think I know that guy.
Old 10-24-2007, 10:28 PM
  #18  
TECH Apprentice
iTrader: (24)
 
Goldfinger911's Avatar
 
Join Date: Jul 2007
Location: Sumner, WA
Posts: 319
Likes: 0
Received 0 Likes on 0 Posts

Default

You are exactly correct. ( I think)
Actually, according to Cartek, even with the 3.905 hone, you are at 382ci with a 4" stroke? They have a 383 offering that is a larger bore and shirter stroke. (Does anyone know for sure?)
Either way, a 383/382 is a great 500whp package +/-. Killer midrange and top end too. My car had the worlds worse tune and did close to 500whp. Specs are in sig.

Originally Posted by LS7jUnKiE
a honing is needed to 3.905 inches, the main increase is in the stroke bumping it up to 4.00 inches.
im pretty sure if you dont hone the bore then you end up with 382ci.

Last edited by Goldfinger911; 10-24-2007 at 10:44 PM.
Old 10-24-2007, 10:52 PM
  #19  
TECH Addict
iTrader: (34)
 
Websy21's Avatar
 
Join Date: Jun 2007
Location: Alberta, Canada
Posts: 2,346
Likes: 0
Received 1 Like on 1 Post
Default

Like the above states, get a 383 built and cam/heads matched. If you got the dough for some nice heads and fast 90/90 port matched 500rwhp would be no prob and nothing to sneeze at. They are torque monsters too, I've always wanted a 383 on the other hand I am getting a 408 built right now
Old 10-24-2007, 11:02 PM
  #20  
10 Second Club
iTrader: (35)
 
JRracing's Avatar
 
Join Date: Feb 2005
Location: Indiana boy
Posts: 4,174
Likes: 0
Received 0 Likes on 0 Posts

Default

A 383 stroker kit is a 3.905 piston, 6.125 rod and 4.00" crank. I have a 383 kit I just bought.


Quick Reply: 383 stroker, worth it?



All times are GMT -5. The time now is 09:56 AM.