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2.3 Whipple efficiency question
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<blockquote data-quote="04GTMustang" data-source="post: 16408847" data-attributes="member: 91468"><p>Thanks for writing up all that, interesting to read. You probably were overspinning/slipping with the more aggressive setup and didn't make more. Interesting to hear about the 2.3 inlet, I guess they did it right with that setup.</p><p></p><p>My tuner (very well respected, Pete Johnson from NH) always comments on how much this little 2.3 can do. He sometimes forgets and thinks it's a 2.9! Not sure if it's just a freak on my car, or what the deal is, but it's consistently 20-30 whp more than an equivalently modded 2.3 TVS car that he sees, and more torque too. Granted, as you crank up the power and have E85 or better fuel, the 2.9 would walk away with it. I've asked him about this before and he seems to think it just might be a limitation of the blower (the drop in boost, that is). Hard to say.</p><p></p><p>Speaking from experience and what I've observed over the years (and however obvious this is about to sound), fuel mods don't give you more power, they simply allow you to make the power that your engine is set up for. If my fuel system was the restriction here, I would have made the same amount of power on that colder day with more boost <strong><u>at a LOWER RPM</u></strong>. The far more efficacious conditions allowed me to make more observed power at the same RPM as the warmer day, but STD correction made them show the same power. If it was a fuel restriction, I would have gone lean before the end of the pull, and made the same 696 but at a lower RPM because of the higher boost, and the Fkin density altitude that day was <strong>-3000. Holy shit!</strong></p><p><strong></strong></p><p>So no, there wasn't a fuel restriction here. All of my dyno pulls, before and after LT's at over 18PSI has shown this 1psi dip after 4500 that seems to level off by the end of the pull. <strong>I was thinking an intake/blower restriction because that boost line doesn't continue to drop off like typical belt slippage. </strong>But who knows, maybe it is slipping just a tad. Just bought a griptec and a roush tensioner to see if that does the trick. I'd do a RPM belt too, but considering it's a very mild case of boost loss, I'd think these two changes would definitely fix the problem.</p><p></p><p>I'm open to any other opinions, however.</p></blockquote><p></p>
[QUOTE="04GTMustang, post: 16408847, member: 91468"] Thanks for writing up all that, interesting to read. You probably were overspinning/slipping with the more aggressive setup and didn't make more. Interesting to hear about the 2.3 inlet, I guess they did it right with that setup. My tuner (very well respected, Pete Johnson from NH) always comments on how much this little 2.3 can do. He sometimes forgets and thinks it's a 2.9! Not sure if it's just a freak on my car, or what the deal is, but it's consistently 20-30 whp more than an equivalently modded 2.3 TVS car that he sees, and more torque too. Granted, as you crank up the power and have E85 or better fuel, the 2.9 would walk away with it. I've asked him about this before and he seems to think it just might be a limitation of the blower (the drop in boost, that is). Hard to say. Speaking from experience and what I've observed over the years (and however obvious this is about to sound), fuel mods don't give you more power, they simply allow you to make the power that your engine is set up for. If my fuel system was the restriction here, I would have made the same amount of power on that colder day with more boost [b][U]at a LOWER RPM[/U][/b]. The far more efficacious conditions allowed me to make more observed power at the same RPM as the warmer day, but STD correction made them show the same power. If it was a fuel restriction, I would have gone lean before the end of the pull, and made the same 696 but at a lower RPM because of the higher boost, and the Fkin density altitude that day was [b]-3000. Holy shit! [/b] So no, there wasn't a fuel restriction here. All of my dyno pulls, before and after LT's at over 18PSI has shown this 1psi dip after 4500 that seems to level off by the end of the pull. [b]I was thinking an intake/blower restriction because that boost line doesn't continue to drop off like typical belt slippage. [/b]But who knows, maybe it is slipping just a tad. Just bought a griptec and a roush tensioner to see if that does the trick. I'd do a RPM belt too, but considering it's a very mild case of boost loss, I'd think these two changes would definitely fix the problem. I'm open to any other opinions, however. [/QUOTE]
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