Velocity stack testing!, Been playing on the dyno again! |
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Velocity stack testing!, Been playing on the dyno again! |
Jake Raby |
Nov 9 2004, 04:29 PM
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#1
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Yep,
Remember the posts about URY and his "too tall" stacks?? I decided to post the data from my latest engine combo as i try to find the perfect stack arrangement for it.. Guys wanting a cheaper, reliable TIV engine will love this one because it has a ton of torque and awesome smoothness. It does NOT have ported heads, so its almost 1,000.00 cheaper than some of its bigger brothers and makes torque very similar, but does not have the RPM range.. Ultimate daily drivin, short shiftin, 901 abusin power- plant.. Anyway, look at these plots and descriptions for this engine here http://www.shoptalkforums.com/viewtopic.php?t=80579 I plan on replicating this exact test on the next 10 engines I dyno and see how port work and cam changes effect the results. The results from this engine do not follow suite with my earlier findings, but almost all those tests were done on high revvin engines.... |
Jake Raby |
Nov 10 2004, 12:40 AM
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#2
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
absolutely... We are fighting with SCCA right now about the manifold situation... The Pierce manifold is still too tall for high revs and it is not the correct size under the butterfly for a 40mm carb, its like 48-50mm!
everything changes when the manidfold length changes, the CB manifold is a great street manifold, so I'm using it for the base for the testing.. I'll have 4 production engines to test this on very soon, as well as manifold length.. |
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