EFI Logics - Customer Reviews / Testimonials

At EFI Logics, we pride ourselves in making the customer our #1 priority. We built our reputation from the ground up, helping enthusiasts build the car of their dreams while not sacrificing reliability or driveability to inflate ego's. Our customers reviews tell the history of the service we provide, and the cars we build. Some of the reviews you read, are posts made on public internet forums to other enthusiasts discussing thier experience with us, others are just emails sent in. Either way, we listen to our customers, and hope that by reading this page, it entices you to check out what EFI has to offer for you and your ride.

If you would like to submit a review, please email us using our contact form: EFI Logics

I've had the pleasure and privilege of training various tuners/calibrators across the U.S., and a few in Japan as well. Every once in a while you run into someone that impresses you. Chris Kiewert is one of those persons that impressed me a few years ago when we first met. He was always open to discussing ideas, never made assumptions, seldom got into those pissing matches that tuners tend to thrive on, and he always treated his customers and their vehicles with respect. If he thought he was pushing things with the tune he would explain the possible consequences to the customer and would allow them to make the choice to continue or to back off to keep things safe. He did not let the dyno queens compromise his personal experiences and beliefs. Enough of kissing his a**. The whole reason for this post was to wish him the best on his new endeavor, EFI Logics.

Christian (Lead Calibrator / Trainer) - Cobb Tuning / Blog

Well, I just hit 100,000 miles on the STi today. I figured its a perfect time to write a review on the car. This car puts a smile on my face every time I drive it. I could not be happier with how it has held up.

No track days, just alot of spirited driving and commuting. Maintenance/repairs - 1 set of brake pads so far, still stock rotors. Replaced clutch at about 93,000. All fluids done as scheduled. Mobil 1 5-30 has been used since I owned the car and I burn about a quart every 5000 miles.

The good: this car still pulls like a beast and hits 21psi (according to the Defi). It has held up surprisingly well considering its driven all year and is parked outside.

I was tuned by Chris (formerly from XX Tuning) at around 60,000-70,000 2 years ago. This past summer (at about 98,000) I had the car put on another dyno just to see what she was making and the numbers were almost identical. The guys at hudson historics said it was pretty amazing and a testament to the quality tune and meticulous maintenance. Just a little proof that if you treat a car well it will return the favor.

PartySub - IWSTi
(Edited for length)

I owe Chris my first born..

Well, I finally have the cobra where I have always wanted it. The HP/TQ is right in the area that I wanted, the car is VERY streetable, idle fluctuation is non-existent, and stalling issues are a thing of the past.

Chris did an AMAZING job with the tune, to say the least. He spent 45 min on the idle/stalling issues alone. I think we both knew at the exact same moment, that he had gotten the bugs out. I know it sounds odd, but that was probably the happiest moment I had with the damn car since I owned it.

After an entire year, the car was idling the way it should. The cobra netted 508 rwhp and 463 rwtq on the Mustang Dyno.

Mike N.- '97 Mustang Cobra
(Edited for length)

Today I drove to Bethel to get my car tuned by Chris. I've taken my car to 3 different shops in CT and dealing with Chris at EFI is defintely the best experience I've had getting my car tuned. He didn't make me wait around all day and he tuned the car perfectly, just the way I told him I wanted. After the ride home, of course, I'm an even more satisfied customer. For a stock turbo sti she pulls hard! Thanks again Chris for an awesome job!!!

Bruce E. - '07 STi Limited

First and foremost, I would like to thank the exceptionally wonderful people at EFI again for the care they gave my car. They didn't just exceed "amazing customer service," to me, they've redefined it! They are friendly, knowledgeable, and extremely competitive in all aspects of all the businesses they work in - but some adjectives that almost seem like they were created especially for them are "dedicated perfectionists."

Chris - thank you so much for diagnosing my car, tuning the devil into it, and for being such a perfectionist with the tune. I think that if I had every last one of your vast tuning skills, i would fall short of creating a tune like the one you provided me with because of the amount of patience you have. It really showed what kind of guy you are when you decided to cancel your plans to stay and finish my car (and save me another trip on something that had nothing to do with them). I am proud to be running your tune(s) right now, elated at the part throttle driveability the car now has, the gas mileage, and just the overall feel to the car. I can't say enough, how happy I am with the way you fixed it up. Hopefully one day soon, i can come back up there and enjoy a beer with you guys!

To make a very long story short, my car had developed an injector problem, and needed a tune to "freshen her up." Chris and Jack fixed her up right, then Chris tuned the hell into it. car runs strong, but better yet, acts like the most civilized car fresh off a showroom floor when it's at part-throttle. I couldn't be happier with the car right now.

Jason O. - '04 STi
(Edited for length)

My brother and I both own '07 Corvette Z06's. I talked him into getting it protuned at a shop as Chris tuned my STi as well. Chris did an excellent job with the tunes. You guys are top notch. I'll be in touch.

Ed -
'07 Corvette Z06
'06 Subaru STi
( Edited for length and multiple posts combined)

What can I say? Forget the GT500 or GT500KR. This is the car Ford should have build as the next Cobra. For my purposes, nothing beats the combination of Kenny-Bell and EFI Logics.

I use the car for commuting, getting groceries, going to the mall and taking my 87 y.o. mom to the doctors. I want it to last for years. I intend to do the club drag days just to see what the numbers are but this is not going to be a hole-shot car for Friday night or a weekly racer at LVD.

What I wanted was rock-solid, safe, dependable, instantaneous mind-bending power in a car I drive every day during the season when it doesn't rain. And that's what I got: an ocean of torque-on-demand with no fuss. the HP numbers aren't insanely ridiculous but the timing is just 16* on 93 octane with an 11.5 A/F.

What's hard to express is the feeling. this thing rocks! at 4000 rpm in third @ 65 mph, I am sitting on top of 21.8 lbs of boost and a ton of torque. When I step on the throttle everything happens real fast. the poor factory 10 lb boost gage is like an on-off switch: it just flicks to the peg. the tach is at redline almost before my foot hits the floor, the rear wheels spin a tiny bit hitting fourth and then the car just lifts up and catapults forward. I get off the gas immediately and the speedometer is sliding back down thru 110. the cars that were in my rear view mirror are gone and I have to brake hard because I'm overtaking traffic up ahead at an alarming rate.

I was worried about traction on the highway but the heat cycled 315 Nitto's and 10.5" wheels seem to hook real good. Slamming it to the floor in third or fourth produces a tiny spin but no real loss of traction or control. I think all the work Jack at EFI did on the suspension really pays off here (frame connectors, solid bushings everywhere, Kenny-Brown tire rods and torque brace, QA1's, etc.)

This car is just amazing. Boost is flat at 21.8 from 3900 all the way to 6100. IAT is only 108* at redline. And now its going to rain all week. oh well, that's OK. because I AM ONE REAL HAPPY CUSTOMER. My thanks to everyone at EFI.

Bill M. '03 Mustang Cobra

Just got back from my tune today with Chris. It was quite a haul, 4.5 hrs there 4 hours back. Worth every minute though. Chris was very thorough and explained what was going on every step of the way. I ended up with exactly what I wanted, a solid and semi conservative tune for my 07. If your anywhere around the area, don't even bother searching any further. Give Chris a call and set up your appointment.

Ed H. ' 07 STi

Heres the story-
About a year ago my car started acting up and has had a surging idle. I decided to ditch my TwEECer and tune so I brought it in to EFI for a tune just to find a bad MAF, so I replaced it with a new SCT uncalibrated MAF. The second time on the dyno, it seemed to have a bad fuel pump, so I sent the fuel pump back to aeromotive for a rebuild. After this the car would still not make a full pull. We got to talking with people and was told not to run an uncalibrated MAF on a fox , so now that Pro-M is back in business I was able to send my MAF back to get fixed. With the new MAF in place, the car seemed to run much better. The next trip back to the dyno ended up with us pushing the car off, because it would not start. It sounded and acted like the starter had died, but replacing it didn’t fix the problem. I traced the problem down to a bad engine ground. At this point the car is running and idling the best it ever has, so it was back on the dyno where we were disappointed, because around 3000 RPM the car was losing spark. We pulled a couple plug wires and they basically fell apart in our hand. These were brand new taylor wires, so I called taylor and they sent me a new free set. So after all these headaches we come to yesterday. The car is now TUNED and making pretty good power, however I need a clutch.

So, I can now drive and enjoy my car! I'm so excited. Right now the car is making around 536rwhp and 610rwtq and the AF is right on. Once I get a clutch we will be turning the boost up a little more. Many Many Many thanks go to Chris at EFI for helping out and getting the car back on the road.

Thanks again Chris for all your time and help! Chris at EFI Rules!!!

Mark - '93 Twin Turbo Mustang
(Edited for length)

My Dad I brought his GT500 down to Chris today for CAI and tune with the new pulley. Chris had the car tuned in two pulls and the results were 535rwhp and 536tq, and that's with stock exhaust. The car is an animal and runs incredible with better than stock driveability.

All and all couldn't have had a better day. The ride home was a blast and the weather turned out to be perfect. Thanks again Chris for incredible service and outstanding work, my father will be a customer for life.

Jamie P. '08 Shelby GT500

Got tuned by Chris @ EFI. He smoothed out the boost, made it come on a lot quicker, and stay on longer. He used a new Autocross specific map he's been working on as the shop cars are dedicated road racers meant for top end power. Spent at least 1.5 hours on the dyno and then went for a cruise where he made a few minor tweaks. All in all, we started around 11:15am or so and finished up a bit after 2 pm. Chris said it was one of the highest wtq stock turbo 06's he's tuned. Definitely worth the 8 hour round trip drive.

Mechie3. '06 Subaru WRX
(Edited for length)

11/14/08 efi tune here. (305/325). First off, Chris accommodated for my time from showing up a little late. Then he was very focused in getting the absolute best tune out of my car given my mods and whatnot. The tune fixed some bucking and surging issues i had on top of smoothing out the ewg i just installed. Not to mention the extra power from my last tune with him. Overall the car pulls amazingly for a daily driver and I absolutely love my sti more now because of Chris' magic. Great surrounding atmosphere, cool new shop, and quite possibly the best tuner around. I will keep coming back to EFI whenever I need and if your thinking about going then I highly recommend it. Whether your a daily driver looking for some extra mpg, or a track/race setup, then go to EFI! BTW, Chris will answer any of your questions as he very informative and caring about your needed or performed tune and even making sure that you enjoy it afterwards. Thank you once again Chris!

John Lucas - '07 STi

Chris is one of the best tuners that I have talked with via PM. He's a really nice, logical, talented guy - unlike a lot of other 'professional' tuners who are basically there to just make money (and don't really understand how to tune).

Tim "Wolfplayer" - '04 STi
(Moderator / ECU Tech / IWSTi)

I visited Chris at EFI and asked him how I can get 340whp and to paraphrase he said "18g ebay TMIC/injectors for 325 whp on his MUSTANG Dyno..which reads 10 or 15whp less. This is the route I am going to take with Chris next spring. By the way his new shop in Bethel Ct is very nice and it is coming together beautifully. Chris had Jack do the install on my Bilstein set up and I am very satisfied. Jack did a great job super clean shop too. We did a few dyno pulls and all is good under the hood. If you are in the Tri-State area go to EFI they are nice people and everyone knows their reputation.

Carl R. - '04 STi

Brothers,
There are precious few times in life when one receives what one pays for...there are even fewer times, and you know what I mean, when one receives more...I feel strongly compelled to share it with others.

Am I gushing?...yep, and if you ever go there you'll know why. Now to the point...
I've seen the these guys at the tracks, shared asphalt with them, and they know how to prepare an STI for the grind. Chris spoke with me about what I'd be doing with the car...drag, street, track? I answered autox and roadcourse.
The road-course use dictated a conservative tune, as 20 minute track sessions demand more safety than 12 second drag pulls. With that decided, off to the dyno...

My mod list:
- 06 STI with the following mods:
- Fram AirHog airfilter- That's right, AirHog...K&N doesn't have an animal mascot so they lose out
- Prosport Header with included uppipe
- Perrin catless downpipe
- APS 3" exhaust
- Snow Performance water/meth injection kit with MAF controller
- 2/3 meth...1/3 water - easy to measure with gallon containers for my 12L tank
- Cobb V2 Accessport with Stage 2 tune

That's it. Not a whole heck of alot of engine stuff, but enough for some fun...

Baseline of Cobb Stage 2 (not tuned):
280hp at 5300 rpm
300tq at 3600 rpm

The tuning started...several pulls later he was done:
320hp at 5300 rpm
380tq at 3350 rpm

What is most surprising, besides the peak gains, is the area "under the curve" and how the curve shifted very much to the "left".

-At 3000 rpm the numbers went from 200tq to 320tq = +120tq
-At 3200 rpm the numbers went from 220tq to 370tq = +150tq

I don't spend much time under 4K rpm on the roadcourse, but autocross puts me down in the low 3K rpm range at times...I wonder how an extra 150tq coming out of corners is going to affect my times....(insert ****-eating grin here)

Without needing to say it, the car feels quite transformed and I am very pleased.

I have quite a bit of data from a couple of roadcourses and I'll compare my pulls with a VBox PerformanceBox (GPS based) to see "real-world" differences...more to follow.

Short story -
This is the place where I will bring my car when something needs to be done that I can't do myself. I will drive the hours to get there, I'll pay the towing fee to get my car there...and I'll be happy to do it.
I highly recommend Chris's tuning kung-fu.

Be good,
TomK