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1957 Chevy 9" swap HP Loss?
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<blockquote data-quote="swampratt" data-source="post: 2912516" data-attributes="member: 15054"><p>I busted the stock GM rear end in my '57 4 door car and I had a 9" Ford in the back yard that was 1" wider.</p><p>The Ford 9" is now in there and all hooked up with new axle bearings , new seals and new brakes. </p><p></p><p>A 3.5" diameter driveshaft replaced the 2.75" stock one. As it needed to be 1.25" longer to fit correctly.</p><p></p><p>I will be heading to the rear wheel dyno today to see if I lost any power from the swap.</p><p>They claim the 9" ford is a power robber.</p><p></p><p>Abel racing will dyno it (MoBoost) </p><p><a href="https://www.facebook.com/AbelRacing/" target="_blank">https://www.facebook.com/AbelRacing/</a></p><p></p><p>This has been on the dyno many times testing intakes and carbs and timing curves and I think my last pass was 245 or 247 Wheel HP.</p><p>I want to hit Thunder Valley soon during test and tune to see If the ET has changed. Last pass was 14.4?</p><p>350" with flat tops and 1.84-1.50 valves in GM cast iron heads with 268H flat tappet cam on a 112 LSA TH 350 transmission</p><p>Cast iron GM Qjet intake and Cast iron Ex manifolds Qjet carb, 2 1/4" exhaust.</p><p>Nothing special.</p></blockquote><p></p>
[QUOTE="swampratt, post: 2912516, member: 15054"] I busted the stock GM rear end in my '57 4 door car and I had a 9" Ford in the back yard that was 1" wider. The Ford 9" is now in there and all hooked up with new axle bearings , new seals and new brakes. A 3.5" diameter driveshaft replaced the 2.75" stock one. As it needed to be 1.25" longer to fit correctly. I will be heading to the rear wheel dyno today to see if I lost any power from the swap. They claim the 9" ford is a power robber. Abel racing will dyno it (MoBoost) [URL]https://www.facebook.com/AbelRacing/[/URL] This has been on the dyno many times testing intakes and carbs and timing curves and I think my last pass was 245 or 247 Wheel HP. I want to hit Thunder Valley soon during test and tune to see If the ET has changed. Last pass was 14.4? 350" with flat tops and 1.84-1.50 valves in GM cast iron heads with 268H flat tappet cam on a 112 LSA TH 350 transmission Cast iron GM Qjet intake and Cast iron Ex manifolds Qjet carb, 2 1/4" exhaust. Nothing special. [/QUOTE]
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1957 Chevy 9" swap HP Loss?
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