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The Terminator
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2.3 Whipple efficiency question
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<blockquote data-quote="04GTMustang" data-source="post: 16408291" data-attributes="member: 91468"><p>Hey fellas,</p><p></p><p>I was studying some of my dynosheets and noticed my 2.3 Gen II Whipple running a 2.875" upper with a 100 mm idler and a belt in good shape is making around 19.5 psi and sometimes a bit more (as high as 20.5+) depending on weather. It always seems to drop one full pound of boost regardless of what the max # is that day by the end of the pull. I've never noticed any slipping, but was thinking that this level is basically starting to reach the max efficiency of the 2.3 Whipple.</p><p></p><p>I have a JLT RAI, I believe an accufab model SBTB, stock whipple non-crusher inlet, long tubes to 3" x-pipe w/ high flow cats. Stock intercooler, stock motor, stock lower pulley.</p><p></p><p>Has anyone else seen this trend on this blower? I'm wondering if it's slipping a little at the top, and have been seeing those Griptec pulleys popping up which I'm tempted to try. Here's two different pulls in different weather conditions. See the boost line in that yellow color how it starts drop at 4500 and settles off at 5700ish.</p><p></p><p>EDIT: I measured the graph that didn't show the final boost at the end of the pull, it was 19.7#, so each pull loses about 1-1.2 PSI at the top.</p><p></p><p>[ATTACH=full]1637043[/ATTACH] [ATTACH=full]1637044[/ATTACH]</p></blockquote><p></p>
[QUOTE="04GTMustang, post: 16408291, member: 91468"] Hey fellas, I was studying some of my dynosheets and noticed my 2.3 Gen II Whipple running a 2.875" upper with a 100 mm idler and a belt in good shape is making around 19.5 psi and sometimes a bit more (as high as 20.5+) depending on weather. It always seems to drop one full pound of boost regardless of what the max # is that day by the end of the pull. I've never noticed any slipping, but was thinking that this level is basically starting to reach the max efficiency of the 2.3 Whipple. I have a JLT RAI, I believe an accufab model SBTB, stock whipple non-crusher inlet, long tubes to 3" x-pipe w/ high flow cats. Stock intercooler, stock motor, stock lower pulley. Has anyone else seen this trend on this blower? I'm wondering if it's slipping a little at the top, and have been seeing those Griptec pulleys popping up which I'm tempted to try. Here's two different pulls in different weather conditions. See the boost line in that yellow color how it starts drop at 4500 and settles off at 5700ish. EDIT: I measured the graph that didn't show the final boost at the end of the pull, it was 19.7#, so each pull loses about 1-1.2 PSI at the top. [ATTACH=full]1637043[/ATTACH] [ATTACH=full]1637044[/ATTACH] [/QUOTE]
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