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
An interesting upgrade for some older vehicles.
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: 3083180" data-attributes="member: 15054"><p>I assume the 305 is still running just smoking?</p><p></p><p>Use the 305 heads way better than any 76cc head from the gm line from factory.</p><p>Toss them onto a 350 with 268H comp cam or lunati cam and have 350HP 350"</p><p>That same cam in a 305 with 9.5 compression and bowl porting will reward you with 300HP.</p><p></p><p>Bring me the 305 heads and I will show you how to port them.</p><p>Something else i experimented with on those GM iron heads was to open the pushrod pinch.</p><p></p><p>I ported a set and left the intake face and pinch alone. thinking smaller cross section on this particullar build would result in more MPG and i used a very small 260H cam.</p><p>MPG was not there my opened up runner heads and larger 268H got 4 MPG better.</p><p>Same everything except head intake runner and cam.</p><p></p><p>Yes the strokers will run circles around the 350. but you build a 383 and stick 76cc non ported heads on it and you got nuffin.</p><p></p><p>That engine in the jegs link is a terrible set up. cam with that duration and 8.0 compression.</p><p>I can see some sad low speed pulling power and probably not real good MPG.</p><p></p><p>I ran the 224@ .050 cam many times and it liked to swing to 6900 rpm with a conservative tune.</p><p>My 218@ .050 makes max HP at 5700RPM with 1.84-1.50 valves in 305 heads.</p><p>Will twist past 6500rpm lickity split.</p><p></p><p>Old engines are getting hard to come up with a good one.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3083180, member: 15054"] I assume the 305 is still running just smoking? Use the 305 heads way better than any 76cc head from the gm line from factory. Toss them onto a 350 with 268H comp cam or lunati cam and have 350HP 350" That same cam in a 305 with 9.5 compression and bowl porting will reward you with 300HP. Bring me the 305 heads and I will show you how to port them. Something else i experimented with on those GM iron heads was to open the pushrod pinch. I ported a set and left the intake face and pinch alone. thinking smaller cross section on this particullar build would result in more MPG and i used a very small 260H cam. MPG was not there my opened up runner heads and larger 268H got 4 MPG better. Same everything except head intake runner and cam. Yes the strokers will run circles around the 350. but you build a 383 and stick 76cc non ported heads on it and you got nuffin. That engine in the jegs link is a terrible set up. cam with that duration and 8.0 compression. I can see some sad low speed pulling power and probably not real good MPG. I ran the 224@ .050 cam many times and it liked to swing to 6900 rpm with a conservative tune. My 218@ .050 makes max HP at 5700RPM with 1.84-1.50 valves in 305 heads. Will twist past 6500rpm lickity split. Old engines are getting hard to come up with a good one. [/QUOTE]
Insert Quotes…
Verification
Post Reply
Forums
Hobbies & Interests
Gearheads
An interesting upgrade for some older vehicles.
Search titles only
By:
Top
Bottom
