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1957 Chevy 9" swap HP Loss?
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<blockquote data-quote="swampratt" data-source="post: 2912861" data-attributes="member: 15054"><p>I have felt 10HP difference on the street and the track.. but this 1.57 HP was not felt.</p><p>I hear ya on the multiple passes.</p><p>I make a minimum of 3 passes each time I dyno it.</p><p>I made 3 yesterday playing with timing. Different air temps will sometimes require a different total timing to see max HP .</p><p>as you know and jetting will need played with also.</p><p></p><p>Every time on the dyno I check HP at 35 total timing and 38 total and this time i dialed in 38 for starters then took some out and then added more than 38.</p><p></p><p>This engine has never changed more than 3 Hp with timing changes.</p><p>It is pretty happy overall.</p><p>Especially for an all iron gen 1 with a carb and around 11:1 compression.</p><p></p><p>MoBoost has a 57 2 door that beat this car by a little over a length.</p><p>His is going to swap an LS into it.. his current aluminum head 350 made 260 HP at the wheels, 4 speed stick car.</p><p>The hearsay is 400 at the wheels with the LS. and 11.50 ET</p><p>I will need to step up my game.</p><p>I have 1 turbo and some large 76cc casting 993 heads. I need to play with.</p></blockquote><p></p>
[QUOTE="swampratt, post: 2912861, member: 15054"] I have felt 10HP difference on the street and the track.. but this 1.57 HP was not felt. I hear ya on the multiple passes. I make a minimum of 3 passes each time I dyno it. I made 3 yesterday playing with timing. Different air temps will sometimes require a different total timing to see max HP . as you know and jetting will need played with also. Every time on the dyno I check HP at 35 total timing and 38 total and this time i dialed in 38 for starters then took some out and then added more than 38. This engine has never changed more than 3 Hp with timing changes. It is pretty happy overall. Especially for an all iron gen 1 with a carb and around 11:1 compression. MoBoost has a 57 2 door that beat this car by a little over a length. His is going to swap an LS into it.. his current aluminum head 350 made 260 HP at the wheels, 4 speed stick car. The hearsay is 400 at the wheels with the LS. and 11.50 ET I will need to step up my game. I have 1 turbo and some large 76cc casting 993 heads. I need to play with. [/QUOTE]
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