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Corvette
Corvette Performance
Weird Dyno Result
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<blockquote data-quote="Jr. Corvette" data-source="post: 222981" data-attributes="member: 1906"><p>Hey guys. Just got my car dyno'd again today and there's quite the difference. On my baseline dyno it made 340ftlbs and 300hp at the rear wheels. That's 70ftlbs more torque at the wheels than the other dyno.</p><p></p><p>More importantly though we sorted out a big issue. We were getting a lean pocket at 3500 rpm which made a similar dip like my first dyno. After trying a few things, Tim from Dale Adam's suggested my inline filter could be causing the problem because it has a brass element. We removed the element from the filter and ran it again and low and behold that dip was gone and the car had an increase of 23rwhp at it's peak! There are still some little lean and rich pockets here and there but we believe that a single plane intake could sort that out and improve the car further. At the end of the day it made 338ftlbs and 325hp at the rear wheels. That equates to about 385hp and 400ftlbs at the crank which is right were it should be (just like the super Chevy build). That also confirms that this engine will really perform once I get a supercharger. Hopefully our dollar improves one of these days and I can. Maybe you guys can let me know if you hear of a used or broken V3 vortech that I could fix and bolt on<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />.</p><p></p><p>Here are some pictures of my first, fifth and sixth dyno pulls. We were still mucking with some settings on the sixth pull and it developed some rich and lean spots but 5th is the smoothest. I also forgot how to put my fuel injection setup into a closed loop while I was there so the unit kept changing numbers on us. However, the single plane should make it easier for the EFI to manage the fuel and those areas will improve.</p><p></p><p>Thanks again for all the input on this thread. I'm really happy that I could get those issues sorted out and find some more accurate numbers. It really goes to show that dyno tuning can help you find problems you didn't even know existed and help you improve upon your tune further.</p></blockquote><p></p>
[QUOTE="Jr. Corvette, post: 222981, member: 1906"] Hey guys. Just got my car dyno'd again today and there's quite the difference. On my baseline dyno it made 340ftlbs and 300hp at the rear wheels. That's 70ftlbs more torque at the wheels than the other dyno. More importantly though we sorted out a big issue. We were getting a lean pocket at 3500 rpm which made a similar dip like my first dyno. After trying a few things, Tim from Dale Adam's suggested my inline filter could be causing the problem because it has a brass element. We removed the element from the filter and ran it again and low and behold that dip was gone and the car had an increase of 23rwhp at it's peak! There are still some little lean and rich pockets here and there but we believe that a single plane intake could sort that out and improve the car further. At the end of the day it made 338ftlbs and 325hp at the rear wheels. That equates to about 385hp and 400ftlbs at the crank which is right were it should be (just like the super Chevy build). That also confirms that this engine will really perform once I get a supercharger. Hopefully our dollar improves one of these days and I can. Maybe you guys can let me know if you hear of a used or broken V3 vortech that I could fix and bolt on:). Here are some pictures of my first, fifth and sixth dyno pulls. We were still mucking with some settings on the sixth pull and it developed some rich and lean spots but 5th is the smoothest. I also forgot how to put my fuel injection setup into a closed loop while I was there so the unit kept changing numbers on us. However, the single plane should make it easier for the EFI to manage the fuel and those areas will improve. Thanks again for all the input on this thread. I'm really happy that I could get those issues sorted out and find some more accurate numbers. It really goes to show that dyno tuning can help you find problems you didn't even know existed and help you improve upon your tune further. [/QUOTE]
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Corvette
Corvette Performance
Weird Dyno Result
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