Quote:
Originally Posted by pokey1
When I was running a carb I had the engine on a dyno and just by adding the 1" spacer on the RPM and not changing anything else there was a 20 hp difference. I always used the 1" after that on the RPM.
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That's a pretty significant difference. I've never seen that much on an RPM air gap intake with a 1" open. Usually single digits, 7-8-9hp.
The most gain I've seen with a spacer is dad's engine with the Victor intake, using a 2" tall super sucker (4 hole taper spacer) it picked up 18 HP.
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