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Cobra Forums
2013-14 Shelby GT500
Who has a VMP Gen3 TVS
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<blockquote data-quote="Justin@VMP" data-source="post: 16170037" data-attributes="member: 18468"><p>I would have like to have seen results with a 2.7 or 2.8 pulley on the VMP Gen3. I think you would have been a whole lot happier. The 2.65 has a different boost curve than the 2.3...the 2.3l is actually done around 3-4k, it hits pretty hard right there, boost falls off, and comes back. The 2.65, when spun just a little bit hard, comes on strong and then just keeps pulling with no boost drop off. It's hard to compare peak vs peak when the curve shape is different. If poor quality fuel is an issue I actually like the gen3 better because it does not hit peak boost at torque peak where you are most likely to knock. A 3.6l KB that is under-spun to deal with boost/timing limits on 91 oct will have the same loss of average power that you complained about with our gen3, but you went E85 with the KB, so its hard to draw any true comparison IMO.</p></blockquote><p></p>
[QUOTE="Justin@VMP, post: 16170037, member: 18468"] I would have like to have seen results with a 2.7 or 2.8 pulley on the VMP Gen3. I think you would have been a whole lot happier. The 2.65 has a different boost curve than the 2.3...the 2.3l is actually done around 3-4k, it hits pretty hard right there, boost falls off, and comes back. The 2.65, when spun just a little bit hard, comes on strong and then just keeps pulling with no boost drop off. It's hard to compare peak vs peak when the curve shape is different. If poor quality fuel is an issue I actually like the gen3 better because it does not hit peak boost at torque peak where you are most likely to knock. A 3.6l KB that is under-spun to deal with boost/timing limits on 91 oct will have the same loss of average power that you complained about with our gen3, but you went E85 with the KB, so its hard to draw any true comparison IMO. [/QUOTE]
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2013-14 Shelby GT500
Who has a VMP Gen3 TVS
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