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04-11-2014, 09:41 PM
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#1 |
 
Drives: '10 Yaris HB Join Date: Dec 2010
Location: Austell, GA
Posts: 23
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hi comp piston question
Just curious, has anyone ran 11.5 to1 pistons on an other wise stock motor? If so were there any notable gains? Currently running a megan header and a custom intake and was wondering if higher compression pistons and a piggy back will make power worth the cost.
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04-12-2014, 12:31 AM
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#2 |
ULTIMATE
Drives: 07 Yaris Turbo Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
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Just that and tuning? The gains probably don't justify the cost of the build + tuning. Just a guess.
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Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific. |
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04-12-2014, 07:36 AM
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#3 |
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Drives: '10 Yaris HB Join Date: Dec 2010
Location: Austell, GA
Posts: 23
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The only thing I really have to pay for is the pistons and the piggy back, which is a huge help on this. I can have the car professionally tuned for nothing and the install I can do. The tuner actually suggested just doing an emanage ultimate because it was the only piggyback that allowed timing to be advanced. With it installed he could retune the car to run on premium and, inconjuction with the parts i have already ,possibly get gains that way.
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04-12-2014, 02:03 PM
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#4 |
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Only Happy When it Rains
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too many other ways to make or free up power before going for that. Kind of extreme unless you were doing a full on race style build.
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Colin Chapman disciple |
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04-12-2014, 06:47 PM
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#5 |
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Banned
Drives: 1nz-fe Join Date: Apr 2014
Location: usa
Posts: 39
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no gains will be noticeable on that considering a stock 1nz-fe is 10.5:1 so with only one margin of increase on compression without doing much else will just be a waste for your efforts. To increase compression without putting in good cams and valve train to support it is otherwise useless. You will be needing to increase RPM to get some gains which will require the CAMs and Valve train.
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04-12-2014, 10:35 PM
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#6 |
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Drives: '10 Yaris HB Join Date: Dec 2010
Location: Austell, GA
Posts: 23
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Thanks for the feed back everyone. Correct me if I am wrong, but JUN cams are our only choice for cams other than regrinds right?
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04-12-2014, 11:16 PM
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#7 |
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Banned
Drives: 1nz-fe Join Date: Apr 2014
Location: usa
Posts: 39
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That's correct. Never run regrinds, especially for daily use.
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