383
383
10-13-2007, 09:36 PM
#4
3rd Gen Tech Moderator
Join Date: Jun 1999
Location: Orange County, CA
Posts: 780
A 383 in an LT1 is not a big deal to make pass the smog test. Just make sure your headers are CARB approved with the EO number. Pick a mild camshaft, something in the 220-230 intake duration with 112-114 LSA, pair it with a good set of heads like AFR's or Trick Flow's, and find someone to do the custom tuning in the PCM (I can do 92-94 LT1's), and you're in business.
11-07-2007, 12:10 AM
#6
Registered User
Join Date: Oct 2002
Location: Orange Kounty, Kalifornia
Posts: 2,277
Good advice. With the cam, watch the overlap. On a 350, 48 degrees of overlap is the edge of the safe zone. You can get higher with good programming on a dyno.
On a 383, stay below 56 degrees of overlap. If the cam is lopey, then the smog guys get really nervous so keep the idle up.
LS2s are running 6.0s which is a 383 (different engine) but the displacement shows it is possible to pass smog and those are stock. If you've got the money, go for a 383.
www.lnrengine.com is a very good place to go.
On a 383, stay below 56 degrees of overlap. If the cam is lopey, then the smog guys get really nervous so keep the idle up.
LS2s are running 6.0s which is a 383 (different engine) but the displacement shows it is possible to pass smog and those are stock. If you've got the money, go for a 383.
www.lnrengine.com is a very good place to go.
Last edited by Wild1; 11-07-2007 at 12:13 AM.
11-13-2007, 03:35 PM
#7
Registered User
Join Date: Aug 1998
Location: Los Angeles, CA
Posts: 1,384
Good advice. With the cam, watch the overlap. On a 350, 48 degrees of overlap is the edge of the safe zone. You can get higher with good programming on a dyno.
On a 383, stay below 56 degrees of overlap. If the cam is lopey, then the smog guys get really nervous so keep the idle up.
LS2s are running 6.0s which is a 383 (different engine) but the displacement shows it is possible to pass smog and those are stock. If you've got the money, go for a 383.
www.lnrengine.com is a very good place to go.
On a 383, stay below 56 degrees of overlap. If the cam is lopey, then the smog guys get really nervous so keep the idle up.
LS2s are running 6.0s which is a 383 (different engine) but the displacement shows it is possible to pass smog and those are stock. If you've got the money, go for a 383.
www.lnrengine.com is a very good place to go.
Derek @ LNR built my 383. Reasonable prices and the guy is very knowledgeable.
-B
Thread
Thread Starter
Forum
Replies
Last Post