GTRPWR Forums  

Go Back   GTRPWR Forums > General > Tech Discussion > DIYs


Reply
 
Thread Tools Display Modes
Old 12-16-2009   #1
Zacho
GT30RB
 
Zacho's Avatar
 
Join Date: Jun 2009
Location: Edmonton
Posts: 700
My Ride: RB25 "Lexus"
iTrader: (0)
Default DIY: Vipec Rb20/25/26 Install

Here is my guide to installing your pnp ECU in a RB25 ecu case. Note, the rb25/26 cases have their differences so the install on a 26 may differ.

What you'll need:

Soldering Iron
Solder wick
Phillips screwdriver
A drill bit larger than your vacuum line
Patients

Anyways,

Start out by removing the 4 screws on each side of the ECU. One is each corner.


Open!



Now there are 4 screws holding parts of the circuit board up. Remove them.



Once those are out, flip your ECU over and you will find these little shits. They are filled with solder so you can't get your screwdriver in them.



There are six of these.



To remove them, use some solder wick (cheap, simple and effective) to suck the solder out. Careful not to hold the iron on for too long, you can potentially lift circuits off the board if you heat them up too much. If your stock ECU is pooched, then it won't matter. I plan to keep mine just in case.



Now you need to drill one hole for the hose for the MAP sensor. It is the farthest right that I drilled. You will be able to slide the USB cable into the slot already there for the LED to shine through.



Here is where I slid the USB cable through, like I said. Before you assemble the ECU, put on a very long vacuum line and ziptie it on the MAP sensor. Don't overtighten it, doesn't need much to hold it on.



Bolt the covers back on.






I will note to anyone looking to purchase this, Cam at lightspeed was very pleasant to deal with. I called him about a year ago regarding this ECU, and ended up spending my cash on other things. I called him a year later and within 15 seconds of the call he knew who I was.

I will continue this once I am back with my car, and start it with the vipec.
Zacho is offline   Reply With Quote
Old 12-16-2009   #2
mcfly
KPGC10
 
mcfly's Avatar
 
Join Date: Jun 2009
Location: Vancouver
Posts: 3,213
My Ride: 20B cosmo
iTrader: (4)
Default Re: DIY: Vipec Rb20/25/26 Install

well that appears pretty easy.
whats the internal map sensor good for
__________________
If you're not first you're last

mcfly is offline   Reply With Quote
Old 12-16-2009   #3
Zacho
GT30RB
 
Zacho's Avatar
 
Join Date: Jun 2009
Location: Edmonton
Posts: 700
My Ride: RB25 "Lexus"
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

It is. I figured I'd show just how easy it is instead of someone paying 100+/hr shop labor.

2.5 bar absolute, more than I will need.
Zacho is offline   Reply With Quote
Old 02-01-2010   #4
Zacho
GT30RB
 
Zacho's Avatar
 
Join Date: Jun 2009
Location: Edmonton
Posts: 700
My Ride: RB25 "Lexus"
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

Some updates for this thread.

For RB20/25 users ----
Because these never came with any sort of intake air temperature sensor, you will have to install the provided sensor before the throttle body, but after the IC (preferably). The thread is a 1/8 NPT on the sensor, if you want to drill/tap the hole yourself start with a 11/32 hole. Then use your 1/8 npt tap to make a few threads for the sensor. My IC piping is on the thicker side so getting 3 threads on it wasn't an issue. Sealed it with a very minimal amount of teflon tape.

Once you have the sensor in, now you must wire your IAT to communicate to the ECU. You have the option of running new wires from the ECU to the sensor, or use existing wires off the MAF sensor to eliminate running new wires/re pin ECU. Whatever way you choose, you will need a ECU pin to use on the output "AN Temp 2" (pin 36 on ECU). I took this pin from the stock boost solenoid as I am not using it any longer. One wire must go to this "AN Temp 2" pin, and the other must be an ECU ground. No polarity on the sensor.

Looks like this when completed.



RB26 users ----
You should be able to remove your OEM sensor, thread in the ViPEC sensor and swap plugs on your existing harness. Since the OE pin on the ECU for the RB26 IAT sensor is "AN Temp 2", this will work perfect. Once again, sensor does not have a polarity.
Zacho is offline   Reply With Quote
Old 02-02-2010   #5
Rapier46
RB-X GT2
 
Rapier46's Avatar
 
Join Date: Jan 2010
Location: mcflys anus
Posts: 1,691
My Ride: mcflys mom
iTrader: (2)
Default Re: DIY: Vipec Rb20/25/26 Install

how much was the vipec itself? i need something to tune my GTR.
__________________
GTRPWR enthusiast.

Quote:
Originally Posted by jimbojones View Post
There are NO mount points on my N1 downpipe. Therefore, there never was a heat shield to remove.
Rapier46 is offline   Reply With Quote
Old 02-02-2010   #6
Allan74
Banned
 
Join Date: Jan 2010
Posts: 0
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

Quote:
Originally Posted by Zacho View Post
2.5 bar absolute, more than I will need.
I am a little unclear about the Vipec's built-in MAP.....

Is it an actuall 2.5 BAR MAP sensor ? or will it measure 2.5 BAR of boost (meaning it's actually a 3.5 BAR Sensor ?).
Allan74 is offline   Reply With Quote
Old 02-02-2010   #7
BNR32
RB20DE
 
BNR32's Avatar
 
Join Date: Sep 2009
Location: Ft. Mac, Alberta
Posts: 49
My Ride: 1990 Skyline GT-R
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

Don't quote me on this but I'm pretty sure its 2.5 bar total (so 1.5 for boost )
BNR32 is offline   Reply With Quote
Old 02-02-2010   #8
Zacho
GT30RB
 
Zacho's Avatar
 
Join Date: Jun 2009
Location: Edmonton
Posts: 700
My Ride: RB25 "Lexus"
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

2.5 bar absolute, so thats over 1 atm. So about 21.7 psi. More than I will need.

Vipec does offer 3,4 and 5 bar sensors. Or run a different one, whatever works.
http://www.vi-pec.com/page_files/sensors.htm

The ECU's from what I understand recently went up a bit, but they now include everything. I got a deal on mine that I don't think I can post, but they now are 1750 I believe with everything you need.
Zacho is offline   Reply With Quote
Old 02-03-2010   #9
Allan74
Banned
 
Join Date: Jan 2010
Posts: 0
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

How many 0-5v inputs do you have available, that are 're-assignable' ?
Allan74 is offline   Reply With Quote
Old 02-04-2010   #10
Rapier46
RB-X GT2
 
Rapier46's Avatar
 
Join Date: Jan 2010
Location: mcflys anus
Posts: 1,691
My Ride: mcflys mom
iTrader: (2)
Default Re: DIY: Vipec Rb20/25/26 Install

my question? cost? and what about getting it tuned also?
__________________
GTRPWR enthusiast.

Quote:
Originally Posted by jimbojones View Post
There are NO mount points on my N1 downpipe. Therefore, there never was a heat shield to remove.
Rapier46 is offline   Reply With Quote
Old 02-04-2010   #11
Allan74
Banned
 
Join Date: Jan 2010
Posts: 0
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

Quote:
Originally Posted by Rapier46 View Post
my question? cost? and what about getting it tuned also?
$1700+ CAD, Exclusive tuning @ Lightspeed in Red Deer.
Allan74 is offline   Reply With Quote
Old 02-05-2010   #12
Zacho
GT30RB
 
Zacho's Avatar
 
Join Date: Jun 2009
Location: Edmonton
Posts: 700
My Ride: RB25 "Lexus"
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

I'll double check the inputs tomorrow. Some are digital, some are analog etc so I'll make sure.

Yes, the 1700-1750 range for everything you need. Here is my gripe about getting this ECU tuned. With its autotune feature, I just have a feeling Cam would spend an hour using autotune to get a reasonable map, then just spend 30mins/hour fine tuning it and be done. But I never purchased this ECU intending to have someone else tune it.

Even just experimenting with the autotune now for my rpm<1500 it is retarded easy. Set target AFR, hold on cell...done.
Zacho is offline   Reply With Quote
Old 02-13-2010   #13
Paradis
RB20DE
 
Paradis's Avatar
 
Join Date: Feb 2010
Location: Red Deer
Posts: 29
My Ride: HCR32
iTrader: (0)
Default Re: DIY: Vipec Rb20/25/26 Install

That stuff is just the tip of the iceberg for the ViPEC. So many features and fun to be had with using that ECU
Paradis is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -7. The time now is 02:51 AM.


Design By: Miner Skinz.com
Powered by vBulletin®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.