best performance mod for your $$$ - Page 3 - Toyota Yaris Forums

ozmdd · 09-28-2009, 01:00 PM

Quote:

Originally Posted by curik

Guys, speaking about cheap mods, what do you think of installing this DaviesCraig EWP (Electric Water Pump) kit on the yaris? This kit can handle up to a 3.0L engine and can be digitally controlled (optional, sold separately), or otherwise run with the stock thermostat. Price wise I found some on ebay around the AU$180 mark (about 150US??). There is an instruction sheet provided and it looks quite DIYable..

Some of the benefits running EWP are:
- increased fuel economy (one less sob sapping the engine power)
- more power to the wheels (they claim 10kw (~13hp) on a V8 Holden)
- desired coolant temp can be preset (with the optional digital controller)
- can be set to run even after the engine is off (on track days)

https://www.daviescraig.com.au/Image...07-12-2007.pdf

This is VERY interesting to me. Tamago, got any thoughts?

ozmdd · 09-28-2009, 01:03 PM

BTW - to answer the original question, i think the 3-best performance mods, based on bang-for-buck and within the range of the average budget are: lightened/underdrive pulley, axle-back exhaust and air intake swap, in that order.

PETERPOOP · 09-28-2009, 01:13 PM

underdrive pulley/ 1zz throttle body/ NOS

Tamago · 09-28-2009, 01:13 PM

better tires, an aggressive alignment, and rear swaybar. skip the power mods, unless you're doing forced induction or nitrous, it's a waste of money /hp

ozmdd · 09-28-2009, 02:21 PM

Ooh, yes, I forgot the sway bar (rear). Such a good investment.

LittleRed · 09-30-2009, 11:15 PM

Quote:

Originally Posted by brycedudley

i don't know alot about car's and will probably have to have whatever performance mod's done by a shop... but i am just wondering what i should get that is going to get me the most power/speed gain for my $$$. any suggestions?

The best thing ive ever bought for the yaris is a AFE cold air intake..it made an amazing difference in mine as well as using 91 octane gas and putting fuel system cleaners in it on a regular basis..it does give it a slight growl..but a satisfying one...you can do it yourself..its very simple..and cost about 150.00..totally worth it.... alot of bang for your buck

*Astroman* · 09-30-2009, 11:45 PM

Weight reduction is the cheapest. It also depends on your budget. Check out the classifieds, I purchased a used AEM intake and lowering springs, saving about $400 (the price of the springs alone if I had bought them new.) Forced induction/nitrous would be the way to go if you have the money. I went with intake, header, exhaust, pulleys and it shaved just under 2sec off my quarter mile time WITH removing the seats, spare & tools.

magilla · 10-14-2010, 10:29 AM

how much does 07 stock hatchy weight?

hatchbackkid82 · 10-14-2010, 11:26 AM

like 2300 lbs

ilikerice · 10-14-2010, 02:24 PM

Quote:

.it made an amazing difference in mine as well as using 91 octane gas

correct me if im wrong, but i dont think it really matters with stock 1nz engine if you put 87 or 91 octane in your tank. a stock 1nz has low compression anyways and has no real gain in power other than burns cleaner. i know as a crx owner for a decade that the stock 1.6L sohc wont produce any hp from 91 octate to 87. i personally think its more frame of mind that u put something that someone else uses thats tuned for it so u think the cars is quicker, but its really not..
i know this goes true with crx, but i could be wrong with the yaris, if im wrong i will convert to 91 octate today

ROCKLAND TOYOTA · 10-14-2010, 02:34 PM

Quote:

Originally Posted by ilikerice

correct me if im wrong, but i dont think it really matters with stock 1nz engine if you put 87 or 91 octane in your tank. a stock 1nz has low compression anyways and has no real gain in power other than burns cleaner. i know as a crx owner for a decade that the stock 1.6L sohc wont produce any hp from 91 octate to 87. i personally think its more frame of mind that u put something that someone else uses thats tuned for it so u think the cars is quicker, but its really not..
i know this goes true with crx, but i could be wrong with the yaris, if im wrong i will convert to 91 octate today

the NAYSAYERS will be all over this one as this has been touch upon one too many times.

DO A SEARCH on this topic and see what comes up..........

cali yaris · 10-14-2010, 02:41 PM

Quote:

a stock 1nz has low compression anyways

one correction. 10.5:1 is fairly high compression, not low. I'm guessing CRX compression is even higher?

SimTronik · 10-14-2010, 07:35 PM

Hey, was reading the thread since beginning, not sure what a underdrive pulley does. Looking for something that will lower RPM at constant speed...

*tk-421* · 10-14-2010, 08:49 PM

Quote:

Originally Posted by SimTronik

Hey, was reading the thread since beginning, not sure what a underdrive pulley does. Looking for something that will lower RPM at constant speed...

An underdrive pulley does exactly the opposite. The engine revs are a lot more now that I have it on.
You may want to look into throttle controllers instead, since you can basically control the throttle response any way you want, and thus have better control of RPMs at constant speeds.

SimTronik · 10-14-2010, 09:46 PM

Thanks mister.

jcemitte · 10-15-2010, 01:57 PM

This OP clearly did not read the performance primer... lol

mario98c · 10-15-2010, 04:26 PM

The best performance mod for $$$ is nitrous! /thread

cali yaris · 10-15-2010, 05:17 PM

re: #44 and #45:

rpm vs speed is a function of the transmission ratio and tire diameter.

It has nothing to do with the crank pulley, or a throttle controller, or anything else.

09-30-2009, 11:45 PM	#7
Astroman Modded Moderator View User's Garage Drives: 07 Toyota Yaris, 71 Galaxie Join Date: Mar 2007 Location: Wenatchee, WA Posts: 3,670	Weight reduction is the cheapest. It also depends on your budget. Check out the classifieds, I purchased a used AEM intake and lowering springs, saving about $400 (the price of the springs alone if I had bought them new.) Forced induction/nitrous would be the way to go if you have the money. I went with intake, header, exhaust, pulleys and it shaved just under 2sec off my quarter mile time WITH removing the seats, spare & tools. __________________ Please visit my online store for computer stuff and Official Yarisworld decals!

10-15-2010, 04:26 PM	#17
mario98c Drives: Toyota Yaris Sedan 09 STD Join Date: May 2009 Location: Puerto Rico Posts: 1,227	The best performance mod for $$$ is nitrous! /thread __________________

10-15-2010, 05:17 PM	#18
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	re: #44 and #45: rpm vs speed is a function of the transmission ratio and tire diameter. It has nothing to do with the crank pulley, or a throttle controller, or anything else. __________________ 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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09-28-2009, 01:03 PM	#2
ozmdd Reluctantly Crouched... Drives: 2008 Yaris HB M/T Join Date: Oct 2008 Location: DFW, TX Posts: 867	BTW - to answer the original question, i think the 3-best performance mods, based on bang-for-buck and within the range of the average budget are: lightened/underdrive pulley, axle-back exhaust and air intake swap, in that order.

09-28-2009, 01:13 PM	#3
PETERPOOP View User's Garage Drives: 08 white liftback Join Date: Oct 2008 Location: Oahu Posts: 3,674	underdrive pulley/ 1zz throttle body/ NOS

09-28-2009, 01:13 PM	#4
Tamago View User's Garage Drives: UZJ100 Join Date: Dec 2006 Location: Off Grid Posts: 4,916	better tires, an aggressive alignment, and rear swaybar. skip the power mods, unless you're doing forced induction or nitrous, it's a waste of money /hp __________________ Been a long time messing with cars..

09-28-2009, 02:21 PM	#5
ozmdd Reluctantly Crouched... Drives: 2008 Yaris HB M/T Join Date: Oct 2008 Location: DFW, TX Posts: 867	Ooh, yes, I forgot the sway bar (rear). Such a good investment.

10-14-2010, 10:29 AM	#8
magilla Drives: yaris hatch back Join Date: Oct 2010 Location: manchester nh Posts: 23	how much does 07 stock hatchy weight?

10-14-2010, 11:26 AM	#9
hatchbackkid82 Drives: . Join Date: Apr 2007 Location: . Posts: 1,828	like 2300 lbs

10-14-2010, 07:35 PM	#13
SimTronik Machinist View User's Garage Drives: Yaris sedan 2010 Join Date: Sep 2010 Location: Sts-Anges, Quebec, canada Posts: 198	Hey, was reading the thread since beginning, not sure what a underdrive pulley does. Looking for something that will lower RPM at constant speed...

10-14-2010, 09:46 PM	#15
SimTronik Machinist View User's Garage Drives: Yaris sedan 2010 Join Date: Sep 2010 Location: Sts-Anges, Quebec, canada Posts: 198	Thanks mister.

10-15-2010, 01:57 PM	#16
jcemitte View User's Garage Drives: 09 yaris sedan Join Date: Jul 2010 Location: visalia ca Posts: 99	This OP clearly did not read the performance primer... lol