Can you help with 383ci engine build?
02-06-2012, 06:55 AM
#561
- 1986 Original Owner -
Paul, As I said via PM, I used the lightweight checking springs instead of a solid or modified lifter:
This is the pattern I got at 7.350:
Should be about right when head gasket thickness is taken into account.
A few reasons mine needs longer pushrods than yours, not the least of which is the small base circle cam.
Sounds like you are nearly there, congrats.
Should be expecting my tools back soon then!
This is a great thread with lots of good info.
This is the pattern I got at 7.350:
Should be about right when head gasket thickness is taken into account.
A few reasons mine needs longer pushrods than yours, not the least of which is the small base circle cam.
Sounds like you are nearly there, congrats.
Should be expecting my tools back soon then!This is a great thread with lots of good info.
02-06-2012, 07:31 AM
#562
Burning Brakes
Thread Starter
I do not have any vacuume screws at this moment.
RHS spark choice
Street: http://www.summitracing.com/parts/ZEX-82003-8/
Race:http://www.summitracing.com/parts/RHS-82216-8/
02-06-2012, 07:35 AM
#563
Burning Brakes
Thread Starter
Sounds like you are nearly there, congrats. Should be expecting my tools back soon then!
Should be expecting my tools back soon then!
Your tools are now packed and ready to go back
Thank you for the tools
02-06-2012, 09:00 AM
#564
Team Owner
One of the better plugs I have found are the Autolite platinum # AP3924
02-06-2012, 03:41 PM
#565
- 1986 Original Owner -
03-01-2012, 04:50 PM
#567
Burning Brakes
Thread Starter
Wow, you beat me to it again!
Pushrods just arrived and am about to fit them in to the engine.
What OIL do I need to break-in my engine?
Pushrods just arrived and am about to fit them in to the engine.
What OIL do I need to break-in my engine?
03-03-2012, 07:01 PM
#568
Burning Brakes
Thread Starter
Pushrods are fitted, lash adjusted engine is filled up with oil and lube up with 50+ oil pressure.
So far, so good.
About to fit the flywheel and would like to check if I need to use ‘Star lock washers’ when I am using ARP bolts with blue loctite
So far, so good.
About to fit the flywheel and would like to check if I need to use ‘Star lock washers’ when I am using ARP bolts with blue loctite
03-21-2012, 05:52 PM
#569
Burning Brakes
Thread Starter
So, to conclude this thread:
After a sleepless night and feeling sick, the engine has been successfully run in, tuned and tested
We have used Edelbrock 1406 carburettor (http://www.summitracing.com/parts/EDL-1406/) with timing set at 35*@4500 RPM and long tube headers.
Max power 457 @ 5500RPM
Max torque 481 @4300RPM
I was going to test my short headers to find out how much difference in power there is, however the shop owner just shook his head in laughter and talk me out of using them.
In his words: You have built a fantastic street engine, why on earth would you want to kill it with your toy, shiny short headers?
Time to buy new long headers!
Anyway, here is the video, enjoy:
http://www.youtube.com/watch?v=zV_FV...&feature=share
and pics:
After a sleepless night and feeling sick, the engine has been successfully run in, tuned and tested
We have used Edelbrock 1406 carburettor (http://www.summitracing.com/parts/EDL-1406/) with timing set at 35*@4500 RPM and long tube headers.
Max power 457 @ 5500RPM
Max torque 481 @4300RPM
I was going to test my short headers to find out how much difference in power there is, however the shop owner just shook his head in laughter and talk me out of using them.
In his words: You have built a fantastic street engine, why on earth would you want to kill it with your toy, shiny short headers?
Time to buy new long headers!
Anyway, here is the video, enjoy:
http://www.youtube.com/watch?v=zV_FV...&feature=share
and pics:
Last edited by C3Paul; 03-21-2012 at 06:04 PM.
03-21-2012, 06:20 PM
#570
Safety Car
I was going to test my short headers to find out how much difference in power there is, however the shop owner just shook his head in laughter and talk me out of using them.
In his words: You have built a fantastic street engine, why on earth would you want to kill it with your toy, shiny short headers?
Time to buy new long headers!
In his words: You have built a fantastic street engine, why on earth would you want to kill it with your toy, shiny short headers?
Time to buy new long headers!
Im going to reply with this above knowledge everytime!
03-21-2012, 07:41 PM
#571
Race Director
I expected it to pull to 6000. Nice flat torque curve? I can't read the dyno sheet on the video. 481 ft lbs @ 4300 is awesome.
Last edited by 63mako; 03-22-2012 at 08:50 AM.
03-21-2012, 08:29 PM
#572
Burning Brakes
Thread Starter
EDELBROCK PERFORMER SERIES 600 CFM, ELECTRIC CHOKE CARBURETORS
CALIBRATED FOR FUEL ECONOMY
Designed for small-block and small displacement big-block engines, these carbs are recommended only for stock to Performer level applications. They are not recommended for use on RPM or Torker II intake manifolds. Match with an Edelbrock Performer or Performer EPS manifold and other brands of similar design. Calibrated 2% leaner than #1405. Includes both timed and full vacuum ports for ignition advance. Comes with: Metering Jets - Primary .098, Secondary .095; Metering Rods - .075 x .047; Step-Up Spring - yellow (4" Hg). Use our Carb Stud Kits #8008 or #8024 if needed, see Installation Items. For auto trans throttle lever adapters and more, see Tuning Accessories.
Anyway here is the chart:
Last edited by C3Paul; 03-21-2012 at 08:38 PM.
03-21-2012, 09:32 PM
#574
Race Director
Yes, the 600 carb is choking the motor from that flattening out you see at 4800-4900 rpm up and affecting power below that. It is jetted lean as well. Any A/F ratio info on the dyno runs? You will do better at the bottom end if the distributor timing is all in at 3000 RPM instead of 4500 (easy fix with weaker dist springs). It should pull hard to 6200. Might have another 30-40 hp with the right carb and jetting. You need a 750 with a roller 383. Here is a sizing chart I have found to be reliable. Figure 6500 RPM redline with your beehive springs.
http://holley.com/applications/Carbu...bSelection.asp
This would be good.
http://holley.com/0-80770
http://holley.com/applications/Carbu...bSelection.asp
This would be good.
http://holley.com/0-80770
Last edited by 63mako; 03-21-2012 at 09:50 PM. Reason: added carb link
03-22-2012, 12:48 AM
#575
Team Owner
I always thought about running a 600 or 650 on my 383. I'm very good at tuning the EDL carbs. The book only shows limited A/F ratio choices. Years ago I made a spread sheet giving the area of flow with rod and jet combinations
03-22-2012, 07:14 AM
#576
Safety Car
No matter what rod you put in it your only getting 600 CFM of air.
03-22-2012, 07:54 AM
#578
Le Mans Master
How about an updated, final list of components? I was going to try to follow 29 pages of posts, but I'm too old.... I'll die before I finish.
03-22-2012, 08:13 AM
#579
Team Owner
03-22-2012, 08:16 AM
#580
Burning Brakes
Thread Starter
I really do not want this to turn in to why we did or did not use this or that carburettor.
On a paper my engine has the potential to deliver, however lots of engines deliver even more on paper than mine, but in reality they do not and therefore we used the Edelbrock 1406 carb.
I am very happy with my first ever engines build.
It runs and is outperforming my expectations at 425/425.
It appears that this engine with suitably matched carburettor and headers has the potential to deliver even more.
If it doesn't not a big deal! I am happy!!!
This is the Dyno read out:
On a paper my engine has the potential to deliver, however lots of engines deliver even more on paper than mine, but in reality they do not and therefore we used the Edelbrock 1406 carb.
I am very happy with my first ever engines build.
It runs and is outperforming my expectations at 425/425.
It appears that this engine with suitably matched carburettor and headers has the potential to deliver even more.
If it doesn't not a big deal! I am happy!!!
This is the Dyno read out:
Last edited by C3Paul; 03-22-2012 at 10:28 AM.