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Gearheads
An interesting upgrade for some older vehicles.
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<blockquote data-quote="swampratt" data-source="post: 3083266" data-attributes="member: 15054"><p>Even my 350 and 455 olds and buicks in stock low compression form ran much better on 91 octane.</p><p>I can pull timing back and run 87 with my 350's but I like to drive like i stole them.</p><p>The added compression is great for building low end TQ and very snappy throttle response.</p><p>I have my 350's at 10.87 actual compression I built one with 11.9 and it was happier than a 10.5 compression 350 I built with a larger cam.</p><p></p><p>The difference was the 54cc chamber of the high compression build was less detonation sensitive.</p><p>Most small chamber heads are ..This is why I like the 305 heads or take .060" off the old 64cc heads.</p><p></p><p>One better would be to run the 1996 vortec head it continued a few more years after 96 but it is a good power making head.</p><p>Excellent chamber and intake runner.. ex side sucks.. but that is to be expected.</p><p></p><p>300Hp is almost not worth building one. the 268H will make 375HP easy.</p><p></p><p>I want TQ and I want a lot of it everywhere. that is why I build them the way i do.</p><p></p><p></p><p>Yes sir 300HP is very simple to get in a 350"</p><p>And you are right the 350 will be a huge jump in power.</p><p>1978 305 with 2 barrel carb 145 HP at 3800 rpm 245 ft lbs torque at 2400 rpm.</p><p></p><p>1978 350 with 4 barrel carb 170 HP at 3800 rpm 270 ft lbs torque at 2400.</p><p></p><p>Those were dismal days.</p><p></p><p>I have got used to my 350's and have driven new trucks with the 5.3 lS and hate the lack of towing power.</p><p>I built a 327" 9.5 compression for my 47 dodge..disappointed is an under statement .</p><p></p><p>I just pulled a 385" stroker out of it with almost 12:1 compression . and the engine before that was a 350" with nearly 11:1</p><p></p><p>the 327 ran good from 4000-7500+ not worth a crap for a work truck.</p><p>So yea go cubes if it is heavy and you plan on working it.</p><p></p><p>The truck now is getting 355" the 327 will be mothballed for a while.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3083266, member: 15054"] Even my 350 and 455 olds and buicks in stock low compression form ran much better on 91 octane. I can pull timing back and run 87 with my 350's but I like to drive like i stole them. The added compression is great for building low end TQ and very snappy throttle response. I have my 350's at 10.87 actual compression I built one with 11.9 and it was happier than a 10.5 compression 350 I built with a larger cam. The difference was the 54cc chamber of the high compression build was less detonation sensitive. Most small chamber heads are ..This is why I like the 305 heads or take .060" off the old 64cc heads. One better would be to run the 1996 vortec head it continued a few more years after 96 but it is a good power making head. Excellent chamber and intake runner.. ex side sucks.. but that is to be expected. 300Hp is almost not worth building one. the 268H will make 375HP easy. I want TQ and I want a lot of it everywhere. that is why I build them the way i do. Yes sir 300HP is very simple to get in a 350" And you are right the 350 will be a huge jump in power. 1978 305 with 2 barrel carb 145 HP at 3800 rpm 245 ft lbs torque at 2400 rpm. 1978 350 with 4 barrel carb 170 HP at 3800 rpm 270 ft lbs torque at 2400. Those were dismal days. I have got used to my 350's and have driven new trucks with the 5.3 lS and hate the lack of towing power. I built a 327" 9.5 compression for my 47 dodge..disappointed is an under statement . I just pulled a 385" stroker out of it with almost 12:1 compression . and the engine before that was a 350" with nearly 11:1 the 327 ran good from 4000-7500+ not worth a crap for a work truck. So yea go cubes if it is heavy and you plan on working it. The truck now is getting 355" the 327 will be mothballed for a while. [/QUOTE]
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