Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Classifieds
Media
New media
New comments
Search media
Log in
Register
What's New?
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More Options
Advertise with us
Contact Us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Hobbies & Interests
Gearheads
Edelbrock carbs Carter AFB LS tuning.
Search titles only
By:
Reply to Thread
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="swampratt" data-source="post: 3074813" data-attributes="member: 15054"><p>Friend brought over his Chevelle Pro street with the 31x18.5 tires and 489" BBC</p><p>Pro comp 320cc heads with 262-272@ .050 camshaft 2500 stall 12" converter Yea that is what I said.</p><p></p><p>Anyway he has the dual 4 tunnel-ram tall one and 2 750 edelbrock #1407 carbs ..10.5 compression. 100 octane and a lot of nitrous.</p><p></p><p>Now he did not run it with nitrous as I told him bring it to me and I will tune it .</p><p></p><p>It was all stock inside the carbs.</p><p>Major bog off idle and even at 3000 rpm punch it and stumble and carry on.</p><p>He thought it was rich as plugs were black.</p><p>Fresh build less than 50 miles..cold plugs also.</p><p>Changed plugs to 1 step hotter.</p><p></p><p></p><p>Checked too see if metering rods stayed down at idle?</p><p>Yes.</p><p>Do they bounce up quick when you tip the throttle ?</p><p>NO.</p><p></p><p>Swapped the orange spring to silver and they stay down at idle and instantly jump up.</p><p>Test drive.----Way better zero stumble.</p><p>2 changes.</p><p></p><p>I felt some shudder I thought it was tire shake but it felt different.</p><p></p><p>Got back home pulled a couple plugs.. white and clean.</p><p>Replaced 71-47 rods with 65-37 rods.</p><p></p><p>No more shudder and much more throttle response and more power .</p><p>I told him go add more jet and see if it likes it as plugs are still snow white.</p><p></p><p>OK this is what got me. BBC rectangular port heads 2.25-1.88 valves 320cc runners and the low too me compression (cranking psi 165)</p><p>262-272 @ .050. Tight lash Solid roller.</p><p>I was thinking sluggish off the line .</p><p>NOT AT ALL blip the throttle at 1500 and and it responds like a motorcycle engine, instant revs.</p><p></p><p>I stuck a 252@ .050 in a 355" and expected saggy bottom end but it revved like a KZ1000.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3074813, member: 15054"] Friend brought over his Chevelle Pro street with the 31x18.5 tires and 489" BBC Pro comp 320cc heads with 262-272@ .050 camshaft 2500 stall 12" converter Yea that is what I said. Anyway he has the dual 4 tunnel-ram tall one and 2 750 edelbrock #1407 carbs ..10.5 compression. 100 octane and a lot of nitrous. Now he did not run it with nitrous as I told him bring it to me and I will tune it . It was all stock inside the carbs. Major bog off idle and even at 3000 rpm punch it and stumble and carry on. He thought it was rich as plugs were black. Fresh build less than 50 miles..cold plugs also. Changed plugs to 1 step hotter. Checked too see if metering rods stayed down at idle? Yes. Do they bounce up quick when you tip the throttle ? NO. Swapped the orange spring to silver and they stay down at idle and instantly jump up. Test drive.----Way better zero stumble. 2 changes. I felt some shudder I thought it was tire shake but it felt different. Got back home pulled a couple plugs.. white and clean. Replaced 71-47 rods with 65-37 rods. No more shudder and much more throttle response and more power . I told him go add more jet and see if it likes it as plugs are still snow white. OK this is what got me. BBC rectangular port heads 2.25-1.88 valves 320cc runners and the low too me compression (cranking psi 165) 262-272 @ .050. Tight lash Solid roller. I was thinking sluggish off the line . NOT AT ALL blip the throttle at 1500 and and it responds like a motorcycle engine, instant revs. I stuck a 252@ .050 in a 355" and expected saggy bottom end but it revved like a KZ1000. [/QUOTE]
Insert Quotes…
Verification
Post Reply
Forums
Hobbies & Interests
Gearheads
Edelbrock carbs Carter AFB LS tuning.
Search titles only
By:
Top
Bottom