timing 383 stroker motor

Old 04-22-2010, 05:39 AM
  #1  
nightbird
Junior Member
SHOW GUEST
Thread Starter
 
Join Date: Mar 2010
Posts: 3
Default timing 383 stroker motor

hello ,,can anybody tell us the proper timeing on these stroker motors..We ran 2 of these motor last year ..we never felt we ever had timeing right .normal 350 is times 4-8 BTC these stroker motor wont even begin to run at that .there may simply be a problem with our timeing marks..but can seem to put a finger on it .. ..these motor are running flat top pistons or 150 dome ..500-550 lift cams .We ran 26*total and accually burnt pistons
nightbird is offline  
Old 04-22-2010, 06:29 AM
  #2  
ccperf721p
Senior Member
SENIOR BUILDER
 
Join Date: Nov 2008
Location: Phoenix AZ
Posts: 116
Default

34 to 36 degrees of total timing is where you want to be.
ccperf721p is offline  
Old 04-23-2010, 03:15 AM
  #3  
TS1955
Senior Member
DYNO OPERATOR
 
Join Date: Aug 2007
Location: Lost Creek, WV
Posts: 533
Default

If you are "burning" pistons you might check your jetting too. JMO

TS1955
TS1955 is offline  
Old 05-15-2010, 10:10 AM
  #4  
andybyrd
Senior Member
MASTER BUILDER
 
Join Date: Mar 2009
Posts: 151
Default

if your not sure about your pointers. get you a screw in piston stop and turn you engine over by hand and then you can get perfect top dead center and set your pointers then. they cost only around $12.00 for the comp ones. Good luck Andy
andybyrd is offline  
Old 08-29-2010, 11:21 PM
  #5  
altune
Senior Member
MASTER BUILDER
 
Join Date: Oct 2003
Posts: 144
Default

Most small blocks I have built run 32-38 btdc
if not using a fixed distributor, need to take the engine to 3500 rpm to set total ignition timing.
look for jumping of the timing to make sure your distributor gear / cam gear have no , or little movement.
what fuel are you running? Static compression ?
Al
altune is offline  
Old 09-02-2010, 06:06 PM
  #6  
traysvega
Member
JUNIOR BUILDER
 
Join Date: Jun 2003
Posts: 87
Default

I've built several sbc 383 or bigger and depending on heads cam and compression 34-38 degrees is the norm.My current 388 likes 38 total.
traysvega is offline  
Old 09-15-2010, 07:18 AM
  #7  
spib
Senior Member
RACING JUNKIE
 
Join Date: Jan 2006
Location: EastWenatchee,WA
Posts: 887
Default

my 385, has cnc 210 afr heads, 13.1 comp and runs at 33.5 fixed
spib is offline  
Old 08-14-2011, 11:35 PM
  #8  
mechanicmike57
Junior Member
SHOW GUEST
 
Join Date: Jun 2009
Posts: 3
Default

mine loves 36 deg
mechanicmike57 is offline  
Old 08-24-2011, 07:39 AM
  #9  
cncmotorsports
Senior Member
MASTER BUILDER
 
Join Date: Apr 2003
Location: Brookings South Dakota
Posts: 244
Default

32-38 degrees on most all small blocks
cncmotorsports is offline  
Old 06-01-2012, 08:18 PM
  #10  
burgessdg
Junior Member
JOURNEYMAN
 
Join Date: Aug 2007
Posts: 25
Default timing

Definitely have a concern if you ran 26 degrees total and burned pistons. If your 26 degrees was accurate, you were running very lean and that's what burned the pistons up.

As far as the timing, I read an article by Smokey Yunick 40 years ago. He said the way to set your timing is to bring it up to detonation under load and power and then back it off 2 degrees. The man was a genious. That is pretty close to what the computer does on your daily driver. It is obviously much harder on a motor with a solid cam and headers, etc.

I used this method when I was a kid working in a garage in the early 70's. Some cars I would advance up to 8 degrees (at idle) higher than the manual specified. Between that and a little carb tuning. I would guarantee 2-3 MPG increase from their best MPG with my tune. In a 2 year period, I never had one come back that didn't shake my hand and thank me.

I have used that method ever since on non-computer controlled ignitions. I have gone as high as 40 degrees total on both small and big-blocks, but I would not go higher. Never burnt a piston. Higher octane, obviously you can get more timing.

If it's an automatic, the method is easy. Brake torque it in the stall/garage. jack the timing up in 2 degree intervals until it starts pinging. Back it down 1 degree at a time until no ping, and then back it down 2 degrees more for a safety margin. On a stick, you need to take it out, check for pinging at low speed and 4th gear.

Haven't raced in years, but I have a stock '69 427/390 vette. Normally run 93 octane unleaded with octane booster and lead replacement additive (not real lead). When I get a chance, I get some race gas and mix it 50/50. I can get another 3-4 degrees on timing with that and it obviously runs better, not that it runs bad with the unleaded.

Some might read this and think it's foolish. I can tell you it's worked for me for 40 years.

Good luck
burgessdg is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service