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> What have we done to improve 5s mpg?, Anything you've done to get better mpg out of your 6g
post Aug 14, 2011 - 9:21 PM
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ricochet1490



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My initial thoughts on this would be to make some clear (as to not detract significantly from the look of the car) body panels to improve aerodynamic efficiency... but I have a separate thread for that http://www.6gc.net/forums/index.php?showto...mp;#entry928769

I post here however to discuss engine mods. Any ideas or thoughts on this? I was thinking of maybe advancing the ignition timing a bit to burn hotter, increase hp and hopefully mpg, but idk. Does a good CAI help? or a larger O.D. exhaust? What have you guys done?


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post Aug 16, 2011 - 11:56 AM
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spolski07



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lightweight flywheel will remove a lot of the rotational mass. this will raise your MPG a ton


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post Aug 16, 2011 - 12:59 PM
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stephen_lee



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QUOTE (spolski07 @ Aug 16, 2011 - 11:56 AM) *
lightweight flywheel will remove a lot of the rotational mass. this will raise your MPG a ton


only during accel will it matter. steady speed and uphill it will make no difference


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post Aug 16, 2011 - 5:24 PM
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ricochet1490



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QUOTE (stephen_lee @ Aug 16, 2011 - 12:59 PM) *
QUOTE (spolski07 @ Aug 16, 2011 - 11:56 AM) *
lightweight flywheel will remove a lot of the rotational mass. this will raise your MPG a ton


only during accel will it matter. steady speed and uphill it will make no difference


exactly correct. city mpg would improve, but steady cruise on flat highway would be negligible.

So where are we exactly with what can be done? exhaust could go either way.
Improved intake - only if tuned correctly and you stay out of the extra power
advancing timing - viable, to what extent we don't know
has anyone made any mods and tested at all? This weekend I am going to advance the timing to 14deg before top dead. I'll report what I find, as it shouldn't take me more than a week or so. like I said. I'm doing A LOT of highway driving lol.


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Posts in this topic
- ricochet1490   What have we done to improve 5s mpg?   Aug 14, 2011 - 9:21 PM
- - RabidTRD   Anything that helps the car breathe better increas...   Aug 14, 2011 - 9:27 PM
|- - ricochet1490   QUOTE (RabidTRD @ Aug 14, 2011 - 10...   Aug 14, 2011 - 9:38 PM
|- - richee3   QUOTE (RabidTRD @ Aug 14, 2011 - 9:2...   Aug 14, 2011 - 9:41 PM
- - stephen_lee   the biggest increase in MPG comes from a lighter f...   Aug 14, 2011 - 10:03 PM
- - Smaay   Turbos do NOT increase MPG, in fact they hinder it   Aug 15, 2011 - 1:10 PM
|- - KAOS   QUOTE (Smaay @ Aug 15, 2011 - 12:10 ...   Aug 15, 2011 - 1:37 PM
- - bloodMoney   Or you can do what Richee did and just swap in a B...   Aug 15, 2011 - 1:12 PM
- - jordisonjr   ^ No kidding. And boost doesn't help the fact ...   Aug 15, 2011 - 1:59 PM
|- - ricochet1490   QUOTE (jordisonjr @ Aug 15, 2011 - 1...   Aug 15, 2011 - 4:31 PM
- - azian_advanced   in terms of exhaust diameters for ideal flow, this...   Aug 15, 2011 - 7:34 PM
|- - ricochet1490   QUOTE (azian_advanced @ Aug 15, 2011 - 7...   Aug 15, 2011 - 7:51 PM
- - azian_advanced   it would reduce hp actually but not by much. whil...   Aug 15, 2011 - 9:38 PM
- - ricochet1490   i could envision that after a certain point, press...   Aug 15, 2011 - 10:05 PM
- - azian_advanced   advanced timing will gain hp at higher revs so thi...   Aug 15, 2011 - 11:01 PM
- - stephen_lee   smaller static displacement = less air/fuel req...   Aug 16, 2011 - 9:18 AM
- - spolski07   lightweight flywheel will remove a lot of the rota...   Aug 16, 2011 - 11:56 AM
|- - stephen_lee   QUOTE (spolski07 @ Aug 16, 2011 - 11...   Aug 16, 2011 - 12:59 PM
|- - ricochet1490   QUOTE (stephen_lee @ Aug 16, 2011 - 12...   Aug 16, 2011 - 5:24 PM
- - jlspec   Ok finally did some testing of MPG for my 99 vert....   Sep 7, 2011 - 4:19 PM
- - ricochet1490   I have never seen 35 under any circumstances, but ...   Sep 7, 2011 - 5:23 PM
- - jlspec   Yeah, the first trip I took gave me 35 mpg which I...   Sep 7, 2011 - 7:53 PM
|- - ricochet1490   QUOTE (jlspec @ Sep 7, 2011 - 7:53 P...   Sep 7, 2011 - 9:30 PM
- - CaliJeff   Basic stuff to help is what you would do for a tun...   Sep 16, 2011 - 7:56 PM
|- - kamax   QUOTE (CaliJeff @ Sep 16, 2011 - 6:5...   Sep 21, 2011 - 3:52 AM
- - bloodMoney   ^ This. I put 1200 miles on the car this past we...   Sep 20, 2011 - 9:10 PM
|- - ricochet1490   QUOTE (bloodMoney @ Sep 20, 2011 - 10...   Sep 20, 2011 - 9:57 PM
|- - richee3   QUOTE (bloodMoney @ Sep 20, 2011 - 9...   Sep 22, 2011 - 4:35 PM
- - bloodMoney   Yea its a MT.   Sep 22, 2011 - 4:20 PM
- - bloodMoney   Yup Yup. You know I'd take it in a heartbeat,...   Sep 22, 2011 - 8:29 PM
- - NYp8tBaller07   keep it as stock as you can and try to reduce some...   Sep 22, 2011 - 10:03 PM


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