MKCPerformance.com

Tonight I had the pleasure of Open Source tuning a very nice 2005 Subaru Imprezza WRX with stage 2 modifications and a street tune. First we rolled her on the dyno to get a baseline of where it’s at, and then started to dial in the tune even more. After just a few pulls on the dyno she was dialed in for the current setup. Injector duty cycle’s were in the low 90 percentile and boost was at 14.5psi peak, tapering to 12psi at redline.

The car tuned out very well and picked up 14 peak HP and 5 peak LB/FT of torque. In the meat of the graph it picked up as much as 20-25 HP and 8-12 LB/FT of torque. This was all from dialing in the AFR’s and Ignition Timing on the same amount of boost. I would have went higher if there was adequate fueling.

After coming back from the street tune, the customer and I had the opportunity to discuss what avenue to pursue next as far as modifications are concerned. Ultimately, the car needs more fuel to increase the boost.

Since this car is a daily driver, I suggested a mod path we did for another local 2004 WRX. This consisted of a 2007 WRX STI Topfeed fuel rail setup, STI Injectors, STI Topmount, and VF43 Turbo; along with a Walbro 255lph fuel pump and Re-Tune. Here is a comparison of the graph after tonight’s tune vs. the 2004 WRX with the 2007 mods mentioned above. The 2004 was on 18psi as well.

If you would like to check out the customers page with more pictures of the car, please Click Here

The owner of this car came to us a while back after returning from military leave. The car wasn’t building oil pressure, and he wasn’t sure what the problem was, so we meticulously looked over the car and tore it down for a re-build. We sent the block and cylinder head out to a local machine shop. The cylinder head was sent out for a pressure check and to make sure the surface was not warped. Some valves were bent and subsequently replaced. The block was also sent out for a pressure check, along with a check for sunk sleeves, and hot tank to clean out any foreign material from the oil passages.

When putting everything back together some area’s of the build were of concern for us that we wanted to update. For one, the intercooler piping was made from stainless steel and some of the bends and welds weren’t very well thought out. Second, some of the old pipes bends were very abrupt that would hinder flow compared to the new piping.

We have since updated this section of piping with new mandrel bent aluminum piping that we use in all of our turbo builds here at MKC. Here’s a comparison of the old cold side intercooler piping vs. the new aluminum pieces.

And here is the hot side of the intercooler piping, this one had a large section that was smashed flat to clear the steering rack; which it was actually resting on. The new piping clears the rack very nicely now and flows better as the integrity of the tubing wasn’t sacrificed for clearance.

Here’s is the culmination of the build and tuning, putting out over 500whp on 91 octane and 16psi; and over 600whp on Q16 and 25psi. This is all on a single walbro High Pressure 255lph fuel pump and PTE 1000cc injectors.

If you look closer, later in the graph in the upper RPM’s it started to lean out as the fuel pump was done flowing. We turned the boost down for the Q16 tune for a much safer tune on the current fuel system. The customer will be returning for a new fuel and ignition system upgrade for more power very soon, as he is currently getting the transmission and rear end taken care of.

We are just putting the final touches on the MoTec m800 install. Watch this post for pics!

-Chad

During Planning.

Final Mock up. Wires are Mil-spec and we used Raychem heatshrink for the entire install. This is a top notch MoTec M800 install.

We currently have the following sensors installed for datalogging purposes:
MAP – Manifold Absolute Pressure
TPS – Throttle
CLT – Engine Coolant Temp
CHT – Cylinder Heat Temp
AIT – Air Intake Temp, just before the throttle body
OT – Oil Temperature in the Oil Pan
FP – Fuel Pressure
OP – Oil Pressure
VSS – Driven Wheel Speed Sensor

we will be addding more sensors as we go like exhaust back pressure, crankcase pressure, radiator pressure, non-driven wheel speed, etc. to get the car quicker and more reliable while we continue to push the limits.

This past weekend MidwestEvos.com celebrated their 2nd birthday here with a AWD Dyno Weekend and Car show. Along with the Evo’s, was a few members from KCSubaru.com who came to help celebrate the birthday bash. It was an excellent turnout with people travelling from all over the midwest to attend. During the car show Scott from MWE.com gave out awards for multiple different categories like

Here are the pictures from the event.

 

Dyno Graphs soon! I’ll update this post with them tonight or tomorrow!

We look foward to next years event!

We just changed NachO’s setup on 7/24/2009, We have sold and installed about 10 of these fuel pumps already.

For NachO’s 2004 SRT-4 we were using a modified walbro 255 pushing into the bosch 044 fuel pump. Kicking the Bosh 044 pump on at 5psi via a low side driver from the AEM EMS. Exactly like a hobbs switch would work. This was wired to a waterproof fusible link and 40 amp relay using mil-spec wiring for total reliability.

We have since changed to 2 044’s, one in the tank and one inline. And both are running full time now, as pushing thru one 044 is too much of a restriction for the fuel pressure we are running; 70psi base pressure.

Bosh 044 installed inline on a SRT-4

Bosh 044 installed intank on a SRT-4

The walbro was ditched for this reason too as the system is running a total of 100psi of fuel pressure during the end of 3rd and all of 4th gear (~30psi of boost).

Walboro 255 on the Left and the Bosh 044 on the right. Notice a difference?

Our Friends over at Jays Racing had ths to say about the Bosh 044:

Capable of providing 300 LPH free flow and 200 LPH at 5 bar (or 72.5 psi) for up to 685 BHP. In comparison, the Walbro GSS341 255 “high pressure” fuel pump can support 390 BHP Note: Values calculated at 12V, 3 bar (43.5 psi) base fuel pressure, 2 bar (29 psi) boost pressure, 1:1 fuel pressure regulator ratio.

We can install the Bosh 044 in just about any other type of car we work on, Turbo Hondas, Evo’s, STi’s, 3000GT’s. This fuel pump is as universal as they come.

Feel free to check out pics of the 044 in tank on the 2004 SRT-4 and in-line also. Click Here for more pics

-Chad

After the initial tune was done for Megan’s’ STI using the “Draw-Thru” intake tube, it was having a very tough time holding a steady idle. It would like to wander quite a bit, especially for a car with drive-by-wire it was especially difficult to keep happy. This car was pulling 21 to 22 inches of vacuum at idle and would play havoc on the Tial 50mm Q-BOV, even with the highest rated spring Tial offers; and with a “Draw-Thru” MAF setup this causes very rich conditions and poor idling due to the to too rich of an air/fuel mixture.

The optimal solution was to use the Perrin Performance “Blow-Thru” Intercooler Pipe. This positions the MAF sensor further up the stream of the system and puts it in the intercooler ipe just before the throttle body and after the Tial Q-BOV. The proper modifications were made for the Tial Q-BOV to fit where Perrin has it set up for their BOV, we simply cut the flange off and welded on the Tial 50mm flange in it’s place.

I made some modifications to the pump gas tune before firing the car up, as some tweaks to the tune need to be made to the ECU with a flash rather than live tuning; like DBW throttle and idle settings. After firing the car up with the new MAF placement some quick tuning of the MAF scaling at idle was done. The live tuning option of the Cobb Accessport V2 with the Race Tuner software really makes it a quick process without having to make a change, connect the green connectors, and then flash it. The car was re-tuned for WOT and drive-ability as well for both pump gas and E85, as this new MAF placement required it. With this mod we were also able to get more resolution from the MAF sensor all together, which resulted in more horsepower and torque throughout the power-band.

We will have complete pics of the new MAF set-up posted soon, keep an eye on Megans Customer page for the latest images and Media on this build

-Chad

Well I had a little time yesterday to focus back on one of my personal projects. I recently picked up another Evo 8 and was planning to use it as a daily driver, this was a previously wrecked and re-built salvage title car which I purchased for a steal. After going over the car with a fine tooth comb and knowing that I’m an anal OCD bastard, I decided to make the new Evo 8 the Drag Evo and my original 2003 Evo with less than 20k on the chassis which was a no brainer. The paint, interior, suspension, and overall look of my original Evo was much better suited for a daily driver.

I’ve had both motors and drive train out of both cars for a little bit now, so this made it much easier to install the go fast modifications. Here’s the current list of items being installed:

Kelford 272 Camshafts
Fidanza Cam Gears
ARP Headstuds

Injector Dynamic 1000cc Injecors
AMS Fuel Rails
Aeromotive Fuel Pressure Regulator
AMS fuel system with dual Walbro 255’s in parallel with -8 feed line

Magnus Evo Cast dual rail Intake Manifold
Ported Stock Throttle Body with 3” Wiggins Clamp
10.5cm turbo from a 2005 Evo 8
Buschur Racing 4” Race I/C
MKC Custom I/C Piping and Tial 50mm Q-BOV
MKC Custom Air Intake for both Speed Density and MAF

Exedy Triple Carbon Clutch with HD PP
TRE upgraded Evo 8 Transmission
TRE T/Case with Evo RS Diff

Will be tuned with both the Stock ECU and ProEFI, as I will be switching back and forth for testing purposes.

Stay Tuned

-Chad

 

WOW!

Wrap Factory set us off! Check out the new Hot Rod CRX look.

We are currently working on a new look for the SFWD Civic. Looks like MKC is going to show big for IFO. better get your tickets now!

We have a few more updates for later today! Well over 500 pictures now hosted on this blog, of all sorts of builds and cars. If you haveany requests please let us know!

-NachO

 

When this build first started we knew we would need much more fuel than the stock injectors and fuel pump would allow.

As with most boosted builds these day’s they start with a Walbro 255lph High Pressure fuel pump.

With our experience of tuning some high HP cars on E85 fuel, we knew the Walbro can only flow enough for ~450whp. We decided to mod the pump, this is nothing more than bypassing the pressure relief in the pump which is around 75psi of fuel pressure, which gives a little more headroom past the out of the package Walbro fuel pump.

Along with this we installed Injector Dynamics 1000cc injectors along with Perrin Performance’s Top Feed fuel rail kit. The fuel rail kit is a nice addition to give even flow across all 4 cylinders, as the factory setup has typically given a lean condition to cylinder 4.

The injectors are something we have been pushing here for the last few months since we received and tuned our first set. The linearity of them is unmatched it seems, and the dynamic flow testing at various fuel pressures is unheard of.

These have an injector dead time or injector latency from 40psi to 100psi fuel rail pressure in 5psi increments, they also have them for 43.5psi as well which is typical fuel rail pressure on most OEM vehicles.

This just covers the basics of this fuel system, if you would like more information, please call the shop at (913) 432-8468 or stop by! In the next few installments wewill be talking about some of the other details on this build up.

Chad

What do you do when the lady says, I wanna go fast?

So with a tip of the hat and some plied wisdom we have been putting in some long hours to finalize the build on a beautiful 2007 Subaru WRX STi.

It’s been a pleasure working with Megan to take this car to another level. Our planning sessions with Megan lead her to the Perrin Performance GT3076r Rotated Turbo kit, .82 AR. From there we usually inform and suggest some very well balanced supporting mods to ensure a safe and tune-able build.

Along with the turbo kit, we installed:
Perrin’s Stealth Black Front Mount Intercooler kit,
Cold Air Intake for rotated turbo kit,
Tial Blow off valve. Megan wanted black to match her new Winkle black Perrin intake piping.

For the extra fuel we installed:
MKC Performance modified Walbro 255lph fuel pump
Perrin Top Feed Fuel Rail kit.
Injector Dynamic 1000cc High Impedance Injectors

Over the next few days I will be talking about each part of this Perrin kit and how we obtained our fantastic final results!

Chad

After some long hours and tons of help from Jason Siebels, owner of ProEFI, who was in town over the weekend; We successfully were able to get a honda running on the Pro128 box.

This also required the use of a cam gear driven REF/SYNC sensor. We have been using a T1 Race Development kit, that worked wonderfully on the AEM EMS setup. This is a hall effect sensor which is a much cleaner and stronger signal compared to the magnetic sensors in the factory distributor. What is custom for this setup is we needed to either remove 6 magnets from the current cam gear we have, which uses 12 magnets; Or get a new cam gear with 24 magnets on it. We opted to get a new gear as the resolution would not be as good with a 6 magnet gear vs. a 24 magnet gear, and called on Tony @ T1 to take care of us. What this means is we would have a REF point every 120* of crank rotation with a 6 magnet gear vs. 30* with the 24 magnet gear, this is very crucial when we plan to turn the RPM’s north of 11k.

I’ll have some images up very soon along with dyno numbers and time slips!!

 

Thanks again Jason, you are the man!!!

Chad Charlton

We’ve added some new blog pages.

Dyno Graphs – Guess what this is for?

Events – Car club Dyno days, Race events, general announcements

Touchy Tuner – The bossman found out about our little blog project and said “I WANT ONE!” check here for information on the brand new hotness!

You Pick it – Need parts? Check here! we may have it on one of our pick and pull lot cars! Call Ryan for details 913-432-8468

As with any page on our blog, feel free to subscribe and get E-mail updates on any new content.

This is the First post for the MKC Blog. So you all get to look at the glory of a 30R

All I wanna know is how many HP is this mod worth?