Posted by Aaron Bunch on Apr 18 2017
This excellent article is from our friends over at Forced Performance. It is written for 4G63 owners, but it 100% applies to all CT series upgrades. We use Valvoline VR-1 Race oil in all of our personal MR2's.
So for the cliffs notes crowd out there, here is the summary: Do not use Mobil1 10w30 or any other “on highway” GF-4 oil in your 4G63 motor with any high output stock appearing turbo. Use a suitable racing oil designed for high film strength and heavy pressure loading such as Brad Penn, Joe Gibbs, Valvoline VR1, Amsoil Racing oil or Royal Purple racing oil. Also remember that racing oils are detergent free and need to be changed frequently.
(I need to add a note that not all Royal Purple or Amsoil oils offer race level protection)
Posted by Aaron Bunch on Feb 9 2017
Starting with a 100% bone stock MR2 (do those still exist anymore?).
We are also going to assume you have recently up to date maintenance. So no 150,000 mile timing belts, no knocking, no overheating, no puking oil. No smoking. A few drips of oil here and there are acceptable (sometimes I think MR2 means "leaks oil" in Japanese).
Step 1: Full Tune Up
The stock ignition system is really good on a 3SGTE. You will find lots of old articles about cap/rotor wear etc. Those were wrong. We routinely make over 700whp on basically stock ignition systems, and field tons of "help me" calls about malfunctioning aftermarket coil on plug systems. Coil on plug systems are available, but require stand alone EFI and additional hardware. That adds up to money that could be put to good use elsewhere.
ATS sells a full tune up kit here (for 91-92) or here (93+). The included NGK plugs are pre-gapped a little bit too big. They will work for stock applications just fine, but we suggest dropping the gap down to .028 inches. While you are changing the spark plugs you should take the extra time to do a compression test. This is a good basic indicator of piston/ring condition. You are looking for 140-185 psi of compression. And it's very important that they are all within 5% of each other. Compression testers are available at your local autoparts store for under $30.
Step 2: Let It Breathe
Your car will be louder now. If you are not comfortable with a louder than stock car then sell it and go buy a hybrid. Removing breathing restrictions is fundamental to making power. There are some quiet exhausts occasionally available on the market, but everything will be at least slightly louder than stock.
Intake: You've got a few choices here. You can go with an Apexi bolt in open element air filter like here. They flow great and still filter well. Or you can make your own with parts off ebay. Be sure you have the skills and patience to make a bracket, otherwise your filter will beat itself to death on the fuel filler pipe, quickly develop a hole, and no longer filter. Filters from HKS, Blitz foam, and Greddy Airnex should be avoided.
What a cheap freebie? Take the stock air box base, cut or drill more openings, specifically on the front and outside sides. Remove the stock air bladder from the firewall and reinstall with a new genuine TOYOTA air filter. Be careful to leave enough base material that it can still be bolted down. This flows great, and filters as well as OEM.
Exhaust: The $199 Ebay dual muffler dual tip exhaust flows awesome. We have seen 800whp from these before. Seriously. The bad news is that they are LOUD, especially when combined with downpipes and larger aftermarket turbos. The Berk exhaust does not flow as well, but is much quieter. TCS occasionally offers two exhausts: a quiet SP style exhaust that looks like a 3" version of stock. This is my favorite. It's difficult to make it fit perfectly, but it is quiet and flows reasonably well. The other TCS is the 3.5" dual muffler, dual tip, it's beautiful and BOLD (read: loud).
Downpipes: I'll get to those later. An exhaust can be changed out in about 2 hours at home. A downpipe takes 2-3 times that amount of time. I will also note that adding performance exhaust parts like a downpipe or a 2.75" b-pipe in front of a stock muffler is dumb. There is almost no gain in power because you still have a big restriction at the end. ATS Throttle Body Inlet–hey, it's my page I can push my own products if I want–The 1991-1992 cars NEED this. It's a 4-5 horsepower gain. Want proof that it helps? Well the 1993-1995 cars have a redesigned throttle body inlet that mirrors ours.
Step 3: Cooling
You have three choices (for now) based on budget. There is almost ZERO natrual...
Posted by Aaron Bunch on Oct 4 2016
International Shipping Update: USPS has lost nearly $8000 of our merchandise in the last 90 days. This is a staggering loss to a small company like us. We can no longer ship USPS daily for items over $200. Items or order totals over $200 have to be hand delivered to the post office and additional insurance purchased. Because of the extra time and costs involved we have to raise our international shipping prices. We apologize and thank you for your understanding.
Posted by Aaron Bunch on Apr 11 2016
NEW Clutch Pedal Rebuild kits and OEM Clutch Master Cylinders available in the Drivetrain/Clutches section under parts.
Posted by Aaron Bunch on Jan 27 2015
The new tech at ATS is also a great videographer: https://www.youtube.com/watch?v=QvVQotvAMq8 John came out from Lubbock, TX to have us tune his car in 2014. Luckily he brought along a collection of cameras. We had such a good time and were so pleased with the results (both of the car and the video) that John joined ATS Racing as a full time technician in January 2015. John did an amazing job making ATS look more like a professional shop and less like a junk yard (no easy feat, notice he has to point the camera at the ceiling a bunch, haha). His reactions to riding in his own car after our tuning, and to riding in my car at ~750whp are priceless. The rest of us at ATS are anxious to see what John comes up with for our next video project. Thanks and stay tuned.
Posted by Aaron Bunch on Nov 27 2014
BLACK FRIDAY SPECIALS are now LIVE. These will be available through SUNDAY. Don't miss out.
Posted by Aaron Bunch on Jul 3 2014
Unfortunately ATS Racing has to institute a return policy. You cannot expect to order parts for your car show/event and then return them afterwards for a full refund. We are implementing a 15% restocking fee on normally stocked ATS items. Any items with non-stocked or specialty components are a 20% restocking fee (i.e. turbo kits, pistons). Any custom items such as special compression ratio pistons, 3S pistons above 86.5mm bore, Big Bore 88mm pistons, custom work, tuning, is non-returnable. Returned items must be sent in as-new condition. Please make eligible returns within 60 days of your original purchase. We apologize to our loyal customers and ask for your understanding.
Posted by Scott McClendon on Dec 10 2013
ECUMaster PNP EMU added to Inventory! This is a great little ECU we have been putting through the wringer for the last few months. If you are looking for a good simple ECU that just does the job, then this is the ECU for you! If you want one with all the bells and whistles, then this ECU has that as well!
Posted by Aaron Bunch on Jan 4 2013
Check out our new COOL TOOLS section under Engine parts. We plan to load it with some of our favorite specialty tools.
Posted by Scott McClendon on Dec 3 2012
ATS Racing is proud to now be using My Shop Assist http://www.myshopassist.com/ For scheduling and tracking current projects. It allows us to keep our customers up to date on their projects, and gives us a much better idea of scheduling both for customers and technicians.
Posted by Scott McClendon on Sep 12 2012
The ATS Racing phone system is currently being repaired. If you have urgent requests or questions please feel free to e-mail us at email@example.com. If you need Aaron or Scott specifically, please e-mail either firstname.lastname@example.org, or email@example.com. Sorry for the inconvenience.
Posted by Scott McClendon on Jul 30 2012
Who says you can't drift an MR2? Hugo Soto, one of customers from Spain just sent this video to us...
Hugo Drifting MR2
Hugo is running an ATS 2.2L Stroker, ATS GT3071 turbo kit, Apexi Power FC ECU.
Posted by Aaron Bunch on May 30 2012
On 5/30/2012 at 11:20am ATS was struck by lightning. Everyone is OK, but our phone server has been damaged. We are working on a replacement, but phones will not be working until further notice. Please e-mail us at firstname.lastname@example.org or my personal address at email@example.com
Posted by Scott McClendon on Sep 7 2011
Shipping Estimate now available in Shopping Cart.
Posted by Scott McClendon on Sep 7 2011
ATS Top Mount Turbo Manifolds and Downpipes IN STOCK! Ready to ship. Buy now! Boost tomorrow!
ATS Top Mount Manifolds
Posted by Aaron Bunch on Aug 21 2011
Air Filters and Intakes added to the Parts page. Choose 3.5 or 4" intakes for your MR2.
Posted by Aaron Bunch on May 11 2011
ATS Racing will be closed until May 17th. We are attending MR2 Spring Fling in Orlando, Florida. See you there!
Posted by Aaron Bunch on Apr 7 2011
Phones at ATS Racing are working again.
Posted by Scott McClendon on Jul 14 2010
Posted by Aaron Bunch on Sep 1 2007
joins ATS Racing full time
Posted by Aaron Bunch on Jun 14 2007
Horsepower from just changing your oil? Yes!!read more
Posted by Aaron Bunch on Dec 22 2006
Posted by Aaron Bunch on Nov 26 2005
Posted by Aaron Bunch on Sep 22 2005